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The use of extraction methods to assess the immobilization of metals in hardening slurries

Paweł Falaciński Małgorzata Wojtkowska
Archives of Environmental Protection | 2021 | 47 | 3 | 60-70 | DOI: 10.24425/aep.2021.138464
Keywords hardening slurry cut-off walls sewage sludge thermal treatment immobilization of metals
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Abstract

In Poland, in recent years, there has been a rapid accumulation of sewage sludge – a by-product in the treatment of urban wastewater. This has come about as a result of infrastructure renewal, specifically, the construction of modern sewage treatment plants. The more stringent regulations and strategic goals adopted for modern sewage management have necessitated the application of modern engineering methodology for the disposal of sewage sludge. One approach is incineration. As a consequence, the amount of fly ash resulting from the thermal treatment of municipal sewage sludge has grown significantly. Hence, intensive work is in progress for environmentally safe management of this type of waste. The aim of the experiment was to evaluate the possibility of using the fly ash that results from municipal sewage sludge thermal treatment (SSTT) as an additive to hardening slurries. The article presents the technological and functional parameters of hardening slurries with an addition of fly ash obtained by SSTT. Moreover, the usefulness of these slurries is analyzed on the basis of their basic properties, i.e., density, contractual viscosity, water separation, structural strength, volumetric density, hydraulic conductivity, compressive and tensile strength. The research on technological and functional properties was carried out, the aim of which was to determine the practical usefulness of the hardening slurries used in the experiment. Subsequently, leaching tests were performed for heavy metals in the components, the structure of the hardening slurries. An experiment showed leaching of hazardous compounds at a level allowing their practical application. The article presents the potential uses of fly ash from SSTT in hardening slurry technology.
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Authors and Affiliations

Paweł Falaciński
1
ORCID: ORCID
Małgorzata Wojtkowska
1
  1. Warsaw University of Technology, Faculty of Building Services, Hydro and Environmental Engineering, Warsaw

Mobile forms vs the total content of thallium in activated sludge

Bożena Karbowska Włodzimierz Zembrzuski Joanna Zembrzuska
Archives of Environmental Protection | 2022 | 48 | 3 | 21-27 | DOI: 10.24425/aep.2022.142686
Keywords sewage sludge mobility thallium
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Abstract

Sewage sludge from municipal wastewater treatment plants is currently a serious environmental problem, given its diversity due to the variability of time and heavy metal content. Current research on the monitoring of heavy metals is based on the determination of Pb, Cd, Hg, Ni, Zn, Cu and Cr. This makes any thallium content data difficult to access. The study estimated the degree of contamination of sewage sludge with thallium. The sludge samples came from a sewage treatment plant located in Poland. The results are presented for the total concentration of thallium and its mobile forms. These samples were analyzed by differential pulse voltammetry. The results showed that the average thallium content was 0.203 μg/g and its mobile form was 0.025 μg/g. The conducted research shows that almost 13% of thallium from sewage sludge can be gradually released into the environment.
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Authors and Affiliations

Bożena Karbowska
1
ORCID: ORCID
Włodzimierz Zembrzuski
1
ORCID: ORCID
Joanna Zembrzuska
1
ORCID: ORCID
  1. Poznan University of Technology, Faculty of Chemical Technology, Poland

Fecal sludge management: Insights from selected cities in Sub-Saharan Africa

Emmanuel Alepu Odey Bodjui Olivier Abo Abdulmoseen Segun Giwa Zifu Li
Archives of Environmental Protection | 2019 | vol. 45 | No 2 | 50-57 | DOI: 10.24425/aep.2019.127984
Keywords sanitation fecal sludge sludge management West Africa urban environment
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Abstract

Recent studies have shown that over half of the world’s population lives in urban areas, with the number of people living in slums growing by over 20 million per year and people living in urban areas lacking access to adequate sanitation. This study presents a review of the challenges facing fecal sludge management (FSM). A globally relevant issue in developing urban centers, especially in selected developing countries in West Africa was discussed. Some key findings of the review are that effective sanitation in developing areas depends on the chain of services and that one of the largest problems in sanitation is FSM. This study presents the initial steps toward understanding the main issues involving FSM in developing cities of West Africa. Results are intended to be used as a support for decisions on policies, strategies for FSM, and investments for improved treatment facilities in the region. The study suggests that governments and private sector organizations should develop adequate measures for handling fecal sludge.

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Authors and Affiliations

Emmanuel Alepu Odey
Bodjui Olivier Abo
Abdulmoseen Segun Giwa
Zifu Li

Water and sewage sludge co-digestion: characteristic of the process and its possible applications

Justyna Łucja Górka Małgorzata Cimochowicz-Rybicka
Archives of Environmental Protection | 2019 | vol. 45 | No 1 | 84-91 | DOI: 10.24425/aep.2019.126424
Keywords water treatment sludge sewage sludge co-fermentation biogas disintegration dewatering
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Abstract

The article describes problems related to intensification of energy production at a sewage treatment plant. The authors analyze anaerobic co-digestion of sludge from a water treatment plant and sewage treatment plant. The authors proposed a methodology of the research and analyzed the preliminary results, which showed that co-digestion of sewage and water sludge enhanced biogas production. The authors hope that the results of the study will provide a basis for development of methodology for sludge control and disposal.

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Authors and Affiliations

Justyna Łucja Górka
Małgorzata Cimochowicz-Rybicka

Investigation of Ceramics Admixtured with Waste Sludge from Lead Electroplating

Tadeusz Stefanowicz Małgorzata Osińska Stefania Napieralska-Zagozda
Archives of Environmental Protection | 2000 | vol. 26 | No 3 | 137-149
Keywords ceramics admixture electroplating sludge lead
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Abstract

Clay was admixtured with 1, 2, 3 and 10% of waste sludge precipitated from lead electroplating fluoroborate electrolyte. The sludge contained, besides 60.7% of lead, 3.7% of fluorine. Small standardized ceramic bricks were burnt at 980°C and then tested for physical and mechanical features (contraction, water soaking, freeze resistance, compressive strength) and for leaching with water saturated with carbon dioxide. The tests showed that 1% of added sludge did not change properties of ceramic bricks and leaching of lead and fluorine is not hazardous, while the larger admixtures result in spoiling of quality features. On burning fluorine is emitted to exhaust gases.
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Authors and Affiliations

Tadeusz Stefanowicz
Małgorzata Osińska
Stefania Napieralska-Zagozda

Energetic efficiency of the combined ORC and gas turbine installation powered by the anaerobic sewage sludge stabilization system

Robert Matysko
Archives of Thermodynamics | 2018 | vol. 39 | No 4 | 71-83
Keywords ORC Sludge biogas gas turbine
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Abstract

The present paper describes a cycle, which may be applied in sewage treatment plants as a system to convert biological waste into process heat and electricity. In sludge stabilization processes anaerobic fermentation acts as the source of methane, which can be used then to generate heat and electric current in gas turbines. Products of high-temperature oxidation can be utilized in organic Rankine cycles to generate electric power. Waste heat is used for heating the fermenting biomass. Energy balance equations mentioned in the thesis: organic Rankine cycle, regenerative gas turbine engine, anaerobic sludge stabilization system.

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Authors and Affiliations

Robert Matysko

Removal of Octyl Phenol Ethoxylate (OPE) Using Processed and Unprocessed Industrial Biological Waste Sludge

Ali Rıza Dinçer İbrahim Feda Aral
Archives of Environmental Protection | 2021 | vol. 47 | No 1 | 53-60
Keywords Waste Sludge Adsorption Octyl Phenol Ethoxylate Pyrolyzed sludge
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Abstract

This study investigated the Octyl Phenol Ethoxylate (OPE) removal potentials of raw and treated industrial treatment sludges (ITS) at different pH. Experiments were conducted in a set of 500 ml Erlenmeyer flasks, into which OPE solutions of 300 ml with different initial concentrations (50–300 μg/l) were added into. Adsorption of Octyl Phenol Ethoxylate from an aqueous solution into ITS105 (T=105°C), ITS300 (T=300°C), ITS600 (T=600°C) and ITS450 (pyrolyzed, T=450°C) was carried out at a room temperature. The OPE adsorption rate increase in the treatment sludge processed at 600°C. As opposed to the sludge treated at 105°C, the adsorption rate decreased as the concentration increased. The reason for this was that the porous structure was degraded at 600°C, and the surface charge balance was disrupted. ITS300 had a lower adsorption capacity for Octyl Phenol Ethoxylate removal than ITS105, ITS600 and ITS450 (pyrolyzed). The treatment sludge pyrolyzed at 450°C conformed with the Freundlich isotherm at pH 4 (R2=0.94) and pH 7 (R2=0.89). The treatment sludge heat-treated at 600°C conformed with the Freundlich isotherm at pH 4 (R2=0.97), pH 7 (R2=0.98) and pH 10 (R2=0.99). Additionally, for ITS600, the Brunauer, Emmett and Teller (BET) isotherm was valid at neutral pH. The OPE adsorption coefficient for ITS600 at pH 4 and pH 7 was calculated as 1.05 L/μg and 1.083 L/μg, respectively. According to the BET isotherm (for ITS600) the qm values at pH 4 and pH 7 were respectively 8.21 μg/g and 2.92 μg/g. The temperature of the adsorption value obtained with the Temkin isotherm showed that the interaction between the OPE and the adsorbent substances was not a chemical or ionic interaction but probably a physical interaction.
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Authors and Affiliations

Ali Rıza Dinçer
1
İbrahim Feda Aral
1
  1. Namık Kemal University, Çorlu, Tekirdağ-Turkey

Preliminary Study of Hot Mix Asphalt Containing Water Treatment and Sewage Sludge

J.G. Bastidas-Martínez J. Camapum De Carvalho L.C. Lucena M.M. Farias H.A. Rondón-Quintana
Archives of Civil Engineering | Vol. 66 | No 1 | 225-240 | DOI: 10.24425/ace.2020.131785
Keywords Water treatment sludge sewage sludge mineral filler hot mix asphalt
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Abstract

Throughout the world, considerable quantities of water treatment sludge (WTS) and sewage sludge (SS) are produced as waste. This study assessed in the laboratory, the possibility to use both waste products when they are incorporated as filler at 1% with relation to the total mass of a hot mix asphalt - HMA. To this end, both waste products were initially reduced to ash through a calcination process. Resistance tests under monotonic load (Marshall and indirect tension tests), and cyclic load (resilient modulus test) were applied on mixes that contained WTS and SS. Besides, moisture damage (modified Lotmman test), and abrasion (Cantabro) resistance were assessed. An analysis of variance (ANOVA) test was performed in order to verify if the results are statically equal or not to those of the control HMA. As a general conclusion, it is reported that both materials show a resistance increase under monotonic load and higher stiffness under cyclic load (cohesion) when they are incorporated into the mix as filler despite the fact that the asphalt content used was less than the control mix. However, some problems are observed associated with moisture damage resistance, and friction wear (adherence).

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Authors and Affiliations

J.G. Bastidas-Martínez
J. Camapum De Carvalho
L.C. Lucena
M.M. Farias
H.A. Rondón-Quintana

The Influence of the Doses of Waste Activated Sludge on the Content of PAHs in the Ryegrass and Soil

Stanisław Kalembasa Beata Wiśniewska Mariusz Kluska
Archives of Environmental Protection | 2004 | vol. 30 | No 2 | 115-120
Keywords waste activated sludge hydrocarbons ryegrass
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Abstract

The concentration of hydrocarbons in the yield of dry matter in ryegrass depended upon the sludge dose. The highest concentrations of hydrocarbons in ryegrass were found in a control object. In objects fertilized with waste activated sludge the highest concentration of hydrocarbons was found in ryegrass with 20% ofwaste activated sludge. After a two-year experiment, the highest concentration of hydrocarbons was found in the control object. In soil materials fertilized with waste activated sludge the concentration of hydrocarbons grew along with the sludge dose.
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Authors and Affiliations

Stanisław Kalembasa
Beata Wiśniewska
Mariusz Kluska

The Influence of the Doses of Waste Activated Sludge on The Content of Pahs on The Ryegrass and Soil

Anna Kiepas-Kokot Anna Iwaniuk
Archives of Environmental Protection | 2004 | vol. 30 | No 2 | 115-120
Keywords waste activated sludge hydrocarbons ryegrass
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Abstract

The concentration of hydrocarbons in the yield of dry matter in ryegrass depended upon the sludge dose. The highest concentrations of hydrocarbons in ryegrass were found in a control object. In objects fertilized with waste activated sludge the highest concentration of hydrocarbons was found in ryegrass with 20% ofwaste activated sludge. After a two-year experiment, the highest concentration of hydrocarbons was found in the control object. In soil materials fertilized with waste activated sludge the concentration of hydrocarbons grew along with the sludge dose.
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Authors and Affiliations

Anna Kiepas-Kokot
Anna Iwaniuk

Inactivation of Escherichia Coli during Composting Process of Organic Wastes with Sewage Sludge

Beata Szala Zbigniew Paluszak
Archives of Environmental Protection | 2010 | vol. 36 | No 2 | 57-63
Keywords Escherichia coli composting sewage sludge
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Abstract

The aim of the study was to estimate the effect otthe composting process in the container technology Kneer on E. coli inactivation. The bacteria placed in the special carriers were introduced into the composted material. The elimination rate of E. coli differed depending on both the carriers· location in the biomass and the thermal conditions. The most effective hygienization, nr the material was noticed in summer - after 48 h in the middle layer, 6 days in the top layer and 10 days in the bottom layer. In spring and autumn, the bacteria survived the longest in the bottom layer - 85 and 45 days, respectively. Apart from the high temperature, the research points out the action of other factors such as competition, antagonism and antibiosis.
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Authors and Affiliations

Beata Szala
Zbigniew Paluszak

Sludge-derived biochar: A review on the influence of synthesis conditions on environmental risk reduction and removal mechanism of wastewater pollutants

Ming Yi Lv Hui Xin Yu Xiao Yuan Shang
Archives of Environmental Protection | 2023 | vol. 49 | No 2 | 3-15 | DOI: 10.24425/aep.2023.145892
Keywords adsorption sludge biochar AOPs co-pyrolysis
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Abstract

In the context of resource utilization, the applications of waste biomass have attracted increasing attention.Previous studies have shown that forming biochar by heat treatment of sludge could replace the traditional sludge disposal methods, and sludge biochar is proved to be efficient in wastewater treatment. In this work, the pyrolysis, hydrothermal carbonization and microwave pyrolysis methods for preparing sludge biochar were reviewed, and the effects of different modification methods on the performance of sludge biochar in the synthesis process were comprehensively analyzed. This review also summarized the risk control of heavy metal leaching in sludge biochar, increasing the pyrolysis temperature and use of the fractional pyrolysis or co-pyrolysis were usually effectively meathods to reduce the leaching risk of heavy metal in the system, which is crucial for the wide application of sludge biochar in sewage treatment. At the same time, the adsorption mechanism of sludge biochar and the catalytic mechanism as the catalytic material in AOPs reaction, the process of radical and non-radical pathway and the possible impacts in the sludge biochar catalytic process were also analyzed in this paper
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Authors and Affiliations

Ming Yi Lv
1
Hui Xin Yu
1
Xiao Yuan Shang
  1. Shenyang University of Chemical Technology, China

Dynamics of Size Changes of Selected Groups of Microorganisms in the Soil Fertilized with Municipal Sewage Sludge

Agnieszka Wolna-Maruwka
Archives of Environmental Protection | 2008 | vol. 34 | No.1 | 89-99
Keywords soil sewage sludge plants microorganisms
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Abstract

Przedmiotem dwuletnich badań było poznanie dynamiki rozwoju wybranych grup drobnoustrojów (mikroorganizmy oligotroficzne, kopiotroficznc, proteolityczne, celulolityczne, rozpuszczające fosforany) w glebie nawożonej komunalnymi osadami ściekowymi. Celem przeprowadzonego doświadczenia było wyjaśnienie możliwości zachwiania równowagi biologicznej gleby, przejawiającej się wzmożonym i długotrwałym rozwojem analizowanych grup drobnoustrojów w glebie, po wprowadzeniu do niej materii organicznej w formic osadów ściekowych, w różnych dawkach. W doświadczeniu zastosowano cztery obiekty badawcze: kontrola-gleba + NPK, 2 Mg s.m. osaduha+rok' + NPK, 4 Mg s.m. osadu-hal-rok' + NPK oraz 8 Mg s.m. osaduhatrok' + NPK). Fosfor i potas stosowano przedsiewnie pod orkę, natomiast azot: część przedsiewnie i drugą część pogłównie. Osady ściekowe stosowano przedsiewnie. Poletka glebowe, na których przeprowadzono badania obsiano żytem odmiany Wibro (2003 r.) oraz obsadzono ziemniakami odmiany Bila (2004 r.). Wykazano, że zastosowane dawki osadów ściekowych nic wpływały istotnie statystycznie na namnażanie się mikroorganizmów glebowych. Na podstawie przeprowadzonych analiz mikrobiologicznych stwierdzono, że w badanym okresie (2003-2004) liczebność oznaczonych grup drobnoustrojów ulegała wahaniom, zależnym od terminu pobierania próbek glebowych. Próbki glebowe, niezbędne do przeprowadzenie analiz, pobierane były w lenninach związanych z kolejnymi fazami rozwojowymi roślin. Kolejnym czynnikiem wpływającym na dynamikę rozwoju mikroorganizmów glebowych był gatunek rośliny użytej w doświadczeniu. Żyto uprawiane w 2003 r. stymulowało rozwój większości grup drobnoustrojów (mikroorganizmów oligotroficznych, kopiotroficznych, proteolitycznych, rozpuszczających fosforany). Z kolei ziemniaki w okresie rozwoju generatywnego ( 16.07- 28.08.2004) spowodowały silniejszy rozwój mikroorganizmów celulolitycznych.
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Authors and Affiliations

Agnieszka Wolna-Maruwka

Leaching of PAHs from Fly Ash - Sludge Blends

Czesława Rosik-Dulewska Urszula Karwaczyńska Tomasz Ciesielczuk
Archives of Environmental Protection | 2008 | vol. 34 | No 3 | 41-47
Keywords ash sewage sludge PAH leaching
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Abstract

This work presents results of the release of polycyclic aromatic hydrocarbons (PAH) from granules composed of fly ashes, which are the product of hard and coal combustion and sewage sludge. 3 types of granulates by a weight ratio of ash to sludge 3:7 and 1: 1 were used. The research of PAH leaching was conducted within a simulated period of 24 months, with the examination of PAH washing out every three months. The highest amounts of PAH (297 - 330 μg/kg dw.) were obtained_from granulates containing 7 parts by weights of sewage sludge (3 times higher in comparison with the granulate containing ash and sludge in ratio of I: 1 ). The maximum PAH release from all the examined granulates took place in the 9th month of the research. Benzo(k)fluoranthene revealed the highest fraction (67.4-76.0%) of all examined compounds.
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Authors and Affiliations

Czesława Rosik-Dulewska
ORCID: ORCID
Urszula Karwaczyńska
Tomasz Ciesielczuk
ORCID: ORCID

Impact of reduced straw content on the sewage sludge composting process

Robert Sidełko Bartosz Walendzik Małgorzata Smuga-Kogut Beata Janowska Kazimierz Szymański Anna Głowacka Aleksandra Leśniańska
Archives of Environmental Protection | 2020 | vol. 46 | No 4 | 70-77 | DOI: 10.24425/aep.2020.135766
Keywords sewage sludge composting humification process
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Abstract

The main objective of presented research work was the assessment of the impact of reduced straw content, as organic carbon source, on the course of sewage sludge composting process. During the research work performed in industrial conditions, the composting process going in periodically overturned windrows differing in proportion of dehydrated sludge, straw and structural material being 4:1:1 and 8:1:2 respectively, was observed. The consequence of increase of sludge concentration with relation to straw was decrease of C:N ratio in the input material from 11.5 to 8.5. The following parameters were analyzed as indicators for the assessment of the composting process: contents of fulvic acids (FA), humic acids (HA), lignin, cellulose and hemicellulose as well as absorbance in UV/VIS (λ=280, 465 and 665 nm) range. The results obtained have indicated that the increase of sludge content extends the elevated temperature (T>50°C) period from 42 days to approximately 65 days. Our tests did not confirm that limitation of straw content added to sewage sludge had any adverse effect on the course of composting. PI index (HA/FA), which qualifies the compost as mature in the first case – No 1, exceeds limit value of 3.6 on the 83rd day whereas, in the second case No 2, on the 48th day.
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Authors and Affiliations

Robert Sidełko
1
Bartosz Walendzik
1
Małgorzata Smuga-Kogut
1
Beata Janowska
1
Kazimierz Szymański
1
Anna Głowacka
2
Aleksandra Leśniańska
1
  1. Koszalin University of Technology, Poland
  2. West Pomeranian University of Technology Szczecin, Poland

Research on the possibility of using sludges from washing dolomite and limestoneaggregates in the building ceramics technology

Ewelina Kłosek-Wawrzyn Anna Bugaj
Gospodarka Surowcami Mineralnymi - Mineral Resources Management | 2018 | vol. 34 | No 4 | 65-82 | DOI: 10.24425/122590
Keywords thermal analysis washing aggregate sludge limestone sludge dolomite sludge building ceramics
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Abstract

Washing is very popular technological operation removing clay particles from aggregates. The amount of mineral washing sludges increases. Besides filling the excavations, there is no common method of their utilization. The usage of sludges from washing aggregates in building ceramics might be environmentally friendly way to utilize them.

This paper presents laboratory research on two type of sludges: from dolomite and limestone aggregates washing. Selected properties of sludges such as water content, particle size distribution (sieve and areometric method), chemical composition (XRF), mineral composition (XRD), thermal properties (STA/EGA, dilatometry, heating microscopy) and stability of fired materials during steam exposure were determined.

It was found that dolomite sludge contains more clay minerals and less carbonates, it is more finely grained than limestone sludge. Limestone sludge has large fluctuations in water content and has high content of potentially hazardous calcite grains. During heating up to 1300°C of both dried sludges decarbonation and sintering take place. Dolomite sludge softens, melts and flows below 1300°C. After firing sludges at 1000°C material made of limestone sludge is not resistant to steam.

The obtained result suggests that dolomite sludge can be used in building ceramics technology without processing as main component of ceramic mass. Limestone sludge have to be ground before its application in building ceramic materials. Results suggest that it can not be used as the main raw material in ceramic masses, but only as an additive.

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Authors and Affiliations

Ewelina Kłosek-Wawrzyn
Anna Bugaj

Seasonal changes of ciliates in activated sludge (wastewater treatment plant „Bieławin”, Chełm)

Monika Tarkowska-Kukuryk Tomasz Mieczan Wojciech Pęczuła Jacek Rechulicz Wojciech Płaska Katarzyna Radomska
Teka Komisji Ochrony I Kształtowania Środowiska Przyrodniczego | 2016 | Vol XIII
Keywords wastewater treatment plant activated sludge ciliates
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Abstract

The primary objective of the present study was to determine the seasonal dynamics of ciliates in activated sludge. Studies were carried out in order to verify the hypothesis that fertility of a habitat may significantly influence the seasonal dynamics of the abundance of ciliates, as well as the number and intensity of correlations between physic-chemical parameters and ciliates. It seems that the values of numbers of ciliates were seasonally changeable. The highest numbers of ciliates were found in spring and summer, however the lowest numbers of ciliate communities were noted in winter. The studies showed that protozoa community is determined by ammonia mainly in summer. In spring and winter additional factors may be important. Probably suspended solid, total organic carbon and concentration of appropriate food (bacteria and flagellates) are the major regulator of abundance of ciliates.
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Authors and Affiliations

Monika Tarkowska-Kukuryk
Tomasz Mieczan
Wojciech Pęczuła
Jacek Rechulicz
Wojciech Płaska
Katarzyna Radomska

Alkaline solubilisation of waste activated sludge (WAS) for soluble organic substrate – (SCOD) production / Tworzenie się rozpuszczalnego substratu organicznego podczas zasadowego rozpuszczania osadów ściekowych

Jan Suschka Eligiusz Kowalski Jerzy Mazierski Klaudiusz Grübel
Archives of Environmental Protection | 2015 | vol. 41 | No 1 | DOI: 10.1515/aep-2015-0012
Keywords alkaline hydrolysis Waste activated sludge anaerobic digestion
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Abstract

Improving the effects of hydrolysis on waste activated sludge (WAS) prior to anaerobic digestion is of primary importance. Several technologies have been developed and partially implemented in practice. In this paper, perhaps the simplest of these methods, alkaline solubilization, has been investigated and the results of hydrolysis are presented. An increase to only pH 8 can distinctively increase the soluble chemical oxygen demand (SCOD), and produce an anaerobic condition effect favorable to volatile fatty acids (VFA) production. Further increases of pH, up to pH 10, leads to further improvements in hydrolysis effects. It is suggested that an increase to pH 9 is sufficient and feasible for technical operations, given the use of moderate anti-corrosive construction material. This recommendation is also made having taken in consideration the option of using hydrodynamic disintegration after the initial WAS hydrolysis process. This paper presents the effects of following alkaline solubilization with hydrodynamic disintegration on SCOD

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Authors and Affiliations

Jan Suschka
Eligiusz Kowalski
Jerzy Mazierski
Klaudiusz Grübel

Effect of Static Magnetic Field in the Wastewater Treatment Process. II. Change of Organic Compounds and Ammonium Nitrogen in the Static Magnetic Field Strength of 20 mT and 40 mT

Marta Janosz-Rajczyk Agnieszka Tomska
Archives of Environmental Protection | 2002 | vol. 28 | No 3 | 51-61
Keywords wastewater treatment activated sludge magnetic field
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Abstract

In the present investigation we have studied the effects of static magnetic field on removal of organic compounds and ammonium nitrogen by high loading activated sludge. The research was carried out on laboratory scale at room temperature. Three or two continuously operating test systems were used in the experiment. In two test systems the return activated sludge was exposed to magnetic field strength of 20 mT or 40 mT. The magnets were attached to a pipe used for activated sludge recirculation. The nitrification rate for test systems when the return activated sludge was exposed to magnetic field was higher than for control system in absence of magnetic field. The best data was observed for test system which was exposed to magnetic field of 40 mT. The nitrification rate was 2 times higher than for control system when the loading of activated sludge was in the range of 0.6 to 0,9 g COD/gMLSS ·d for. The results show that magnetic field improves nitrification of domestic wastewater by high loading activated sludge.
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Authors and Affiliations

Marta Janosz-Rajczyk
Agnieszka Tomska

Effect of Static Magnetic Field in the Wastewater Treatment Process. I. Change of Organic Compounds and Ammonium Nitrogen in the Static Magnetic Field Strength of 180 mT

Marta Janosz-Rajczyk Agnieszka Tomska
Archives of Environmental Protection | 2002 | vol. 28 | No 3 | 41-50
Keywords wastewater treatment activated sludge magnetic field
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Abstract

In the present investigation we studied the effects of static magnetic field on transformation of organic compounds and ammonium nitrogen. The research was carried out on laboratory scale at room temperature. Two continuously operating test systems were run in parallel. In one of the systems the raw sewage was exposed to magnetic field strength of 180 mT. The magnets were attached to a pipe used for raw sewage. The second system was used as a control. The research was carried out without activated sludge and with activated sludge. The investigation carried out in an experiment without activated sludge showed that the removal of COD for system with the raw sewage exposed to magnetic field strength of 180 mT was 15% higher then system in absence of magnetic field. During investigation carried out in an experiment with activated sludge it was observed that the removal of COD was similar in both systems. The nitrification rate for system in which raw sewage was exposed to magnetic field was lower than the system in which it was not.
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Authors and Affiliations

Marta Janosz-Rajczyk
Agnieszka Tomska

Pentachlorophenol degradation by activated sludge with phenol and glucose as growth substrates

Magdalena Niesler Joanna Surmacz-Górska
Archives of Environmental Protection | 2018 | No 3 | DOI: 10.24425/123360
Keywords phenol cometabolism pentachlorophenol activated sludge adaptation
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Authors and Affiliations

Magdalena Niesler
Joanna Surmacz-Górska

Preliminary Studies under the Effect of Static Magnetic Field on Ammonium Nitrogen Removal in Activated Sludge Process

Barbara Wiśniowska Rafał Nowak Marta Janosz-Rajczyk Joanna Szczypiorowska Maria Włodarczyk-Makuła Janina Koścień
Archives of Environmental Protection | 2000 | vol. 26 | No 4 | 33-43
Keywords static magnetic field ammonium nitrogen activated sludge
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Authors and Affiliations

Barbara Wiśniowska
Rafał Nowak
Marta Janosz-Rajczyk
Joanna Szczypiorowska
Maria Włodarczyk-Makuła
Janina Koścień

Trials on Phenol Decomposition in Sewage by Unadapted Activated Sludge

Tadeusz Stefanowicz Janusz Lisiecki
Archives of Environmental Protection | 2000 | vol. 26 | No 4 | 159-167
Keywords phenol biological decomposition activated sludge adaptation
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Authors and Affiliations

Tadeusz Stefanowicz
Janusz Lisiecki

Nitrogen in the Process of Waste Activated Sludge Anaerobic Digestion

Jan Suschka Klaudiusz Grübel
Archives of Environmental Protection | 2014 | vol. 40 | No 2 | DOI: 10.2478/aep-2014-0021
Keywords Waste activated sludge anaerobic digestion nitrogen struvite
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Abstract

Primary or secondary sewage sludge in medium and large WWTP are most often processed by anaerobic digestion, as a method of conditioning, sludge quantity minimization and biogas production. With the aim to achieve the best results of sludge processing several modifications of technologies were suggested, investigated and introduced in the full technical scale. Various sludge pretreatment technologies before anaerobic treatment have been widely investigated and partially introduced. Obviously, there are always some limitations and some negative side effects. Selected aspects have been presented and discussed. The problem of nitrogen has been highlighted on the basis of the carried out investigations. The single and two step - mesophilic and thermophilic - anaerobic waste activated sludge digestion processes, preceded by preliminary hydrolysis were investigated. The aim of lab-scale experiments was pre-treatment of the sludge by means of low intensive alkaline and hydrodynamic disintegration. Depending on the pretreatment technologies and the digestion temperature large ammonia concentrations, up to 1800 mg NH4/dm3 have been measured. Return of the sludge liquor to the main sewage treatment line means additional nitrogen removal costs. Possible solutions are discussed.

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Authors and Affiliations

Jan Suschka
Klaudiusz Grübel

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