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Research of Effective Microorganisms on Dairy Sewage Sludge Stabilization

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Boruszko D.

Journal of Ecological Engineering

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2019

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tom Vol. 20, nr 3

241--252

EN

The present paper was aimed at determining the influence of particular methods and biological processes, including the application of Effective Microorganisms, on the change in characteristics of the treated dairy sewage sludge, especially when discussing the changes in the content of nutrients and macroelements. The purpose of the conducted research was to specify the possibility of using natural biological methods of dairy sewage sludge treatment and adapting it to environmental, especially farming use. Diagnostic research on the content of sewage sludge from dairy wastewater treatment plants in the north-eastern region of Poland has been conducted since the 1990s. On the basis of the results and the assessment of the possibility of agricultural utilization of dairy sewage sludge, the objectives for research on sludge treatment were established. The research facilities were located on the premises of Municipal Wastewater Treatment Plant in Zambrów. The choice of location for the research facilities was guided by the possibility of supplying the same sludge from dairy wastewater treatment. The excess sludge from biological dairy sewage treatment, which was aerobically stabilized in separate chambers, was used in the research. In all of the facilities where sludge was treated with biological methods, Effective Microorganisms (EM) were also used for comparison. In the years 2010-2013, the research was conducted in the research facilities (own project) constructed and launched in 2010, which were planted with phragmites and common osier. In the years 2010-2012, the research was conducted in the research facilities (own project) constructed and launched in 2010, i.e. vermiculture patches. The conducted research was comprehensive and the obtained experiment results point to the necessity of continuation and further development of research concerning the content transformation in dairy sewage sludge during its biological treatment. Establishing the role of microorganisms present in the EM formula on the processes and transformations occurring in biologically treated sewage seems to be of exceptional importance. The innovativeness of the research lay mainly in a very comprehensive range of natural biological methods of treatment applied for the same sewage sludge coming from dairy wastewater treatment plants. The conducted research points to the influence of the EM formula on vital changes in the content of macroelements in the biologically treated dairy sewage sludge. The most important impact (from the point of view of the number of parameters and the change in size as a result of applying EM formula) was observed in reference to the vermicomposting process with the use of earthworms and long-term stabilization in reed beds. The statistical assessment methods applied to the obtained results of own research (Wilcoxon and Spearman tests, Spearman’s rank correlation coefficient) point to a significant influence of the EM formula on different “behavior” of many analyzed characteristics of the treated sludge.

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Kompostowanie mleczarskich osadów ściekowych w warunkach hiperbarycznych

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Romankiewicz B. , Reguła M. , Różański R. , Potempska M. , Gaze B. , Knutel B. , Wojtko P. , Drozdovych I. , Kawa K.

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2023

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tom T. 102, nr 11

1251--1258

PL

Przedstawiono wyniki badań kompostowania mleczarskiego osadu ściekowego w warunkach hiperbarycznych. Badania przeprowadzono w czterech wariantach: pod ciśnieniem atmosferycznym oraz nadciśnieniem 50, 100 i 150 kPa w czasie 4 i 8 h. Badania wykonano dla tego samego materiału wsadowego o masie 2000 g i charakteryzującego się wilgotnością początkową 80%. Podczas kompostowania osadu ściekowego oceniano także parametry otrzymanego produktu, takie jak zawartość wilgoci, pH, straty przy prażeniu (LOI), stosunek C:N, zawartość składników odżywczych (P, K) i aktywność oddechowa mikroorganizmów (AT₄).

EN

Dairy sewage sludge was composted in the presence of air at atm. pressure and 50, 100 and 150 kPa for 4 and 8 h. Moisture content, pH, loss on ignition (LOI), C:N ratio, N, P, K content and respiratory activity of microorganisms (AT₄) in the initial and composted sludge were detd. The obtained compost was granulated and the abrasion resistance coeff. of the granules was detd. Hyperbaric composting conditions increased the efficiency of the process compared to composting under atm. pressure, and the obtained granules showed a high abrasion resistance coeff.

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Wpływ Efektywnych Mikroorganizmów na zmiany zawartości WWA w osadach ściekowych podczas stabilizacji beztlenowej

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Boruszko D. , Dąbrowski W. , Piekutin J. , Wiater J.

Rocznik Ochrona Środowiska

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2015

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tom Tom 17, cz. 2

914--930

EN

There is a leak of information in literature about anaerobic stabilization of sewage sludge from dairy wastewater treatment plants (WWTPs). Different population of microorganisms are responsible for anaerobic sewage sludge stabilization. Own research were focused on using effective microorganisms (EM) invented by Teuro Higa for anaerobic stabilization. Sewage sludge was taken from dairy WWTP belonging to Mlekovita Cooperative in Wysokie Mazowieckie. It was mixture of excess and flotation sludge from pre-treatment of dairy sewage. Researches were conducted with laboratory scale model with two reactors – one was supplied with EM. Before stabilization average value of 16 PAHs was 0,690 μg·g-1 DM. It was found that trinuclear fraction was 46,4% of total PAHs and four nuclear 35,2% of total PAHs. General tendency of PAHs changes during anaerobic stabilization in both reactors(with and without EM) was similar. In first part of anaerobic stabilization (acid fermentation) after seven days it was observed increasing of total PAHs in reactor with and without EM. The sum of PAHs in reactor with EM was 1,125 μg· g-1 DM while in the other reactor without EM it was 1,201 μg· g-1 DM. This is typical for first part of sewage sludge anaerobic stabilization process. Addition of EM did not inhibited of PAHs release and during hydrolysis higher concentration of PAHs sum was observed due to concentration in raw sewage sludge. After two weeks’ time of anaerobic stabilizations decreasing of total sum of PAHs was observed due to concentration after first week of stabilization. It was smaller in reactor without EM .In the last part of sewage sludge stabilization decrease of most checked hydrocarbons was observed. Total concentration of PAHs in sewage sludge without EM was decreased up to 30,5% due to initial concentration. It was 0,479 μg· g-1 DM. In sewage sludge with EM it was decreasing up to 0,172 μg· g-1 DM (75,1% decrease). It was proved that using EM in anaerobic sewage sludge stabilization was responsible for decreasing of PAHs concentration.

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Seasonal Changes in Microbial Activity of Brown Soil Fertilised with Dairy Sewage Sludge

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Jezierska-Tys S. , Frąc M.

Ecological Chemistry and Engineering. A

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2009

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tom Vol. 16, nr 5/6

575-582

EN

Respiration actiyity and numbers of chosen group of microorganisms were determined in brown soil fertilised with dairy sewage sludge. Research were carried out in field experiment. The study comparing the effect of fertilisation with dairy sewage sludge and of mineral fertilisation on the populations of selected microbial groups and on soil respiratory actiyity were made. The study showed that dairy sewage sludge introduced in the soil caused similar effect on microbiological characteristics as minerał fertilization.

PL

Celem przeprowadzonych badań byfo porównanie oddziaływania osadu ścieków mleczar i nawożenia mineralnego na liczebność wybranych grup mikroorganizmów i aktywność respiracyjną j brunatnej. Wzbogacenie gleby osadem ścieków mleczarskich wywarło korzystny wpływ na jej równo-mikrobiologiczną w porównaniu z glebą nawożoną mineralnie, o czym świadczy bardziej intensywny rozw większości analizowanych grup drobnoustrojów w glebie z osadem niż nawożonej mineralnie.

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Influence of fertilization with dairy sewage sludge sanitised with coal fly ash on microbiological activity and concentration of heavy metals in grey-brown podzolic soil

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Jezierska-Tys S. , Frac M.

Journal of Elementology

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2008

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tom 13

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nr 4

535-544

EN

The aim of the study was to determine how dairy sewage sludge (DSS) sanitised with coal fly ash affected microbiological properties of soil and level of heavy metals in soil. The experiment was performed under laboratory conditions (pot experiment). The experiment was carried out on grey-brown podzolic soil, formed from heavy loamy sand, of acidic reaction. Pots were filled with 4 kg of soil. The investigations were performed in three replications. Two rates of dairy sewage sludge fertilization: 1 and 2.5% DSS⋅kg-1 of soil were applied. The soil in pots was watered to 60% of the total water capacity and incubated for 4 months. Analyses included assays of the total number of bacteria and fungi, number of cellulolytic bacteria, respiration and dehydrogenase activity and concentration of heavy metals. It was confirmed that dairy sewage sludge had a significant effect on properties of soil. It positively affected microbiological activity of soil. The test doses (1; 2.5%⋅kg-1) of dairy sewage sludge sanitised with lignite ash caused stimulation of the growth of bacteria and fungi in soil. Dairy sewage sludge had an inhibiting effect on the dehydrogenase activity and stimulated the respiratory activity in the soil under study. The incorporation of dairy sewage sludge caused a non-significant increase of heavy metal content in soil, which was much lower than the norms.

PL

Celem badań było określenie wpływu osadu ścieków mleczarskich higienizowanego popiołem węgla brunatnego na właściwości mikrobiologiczne i zawartość metali ciężkich w glebie. Badania przeprowadzono w warunkach laboratoryjnych, w doświadczeniu wazonowym. Doświadczenie założono na glebie płowej, wytworzonej z piasku gliniastego mocnego, o odczynie kwaśnym. W wazonach umieszczono po 4 kg gleby. Badania prowadzono w trzech powtórzeniach. W badaniach zastosowano dwie dawki osadu ścieków mleczarskich: 1 i 2,5% osadu • kg-1 gleby. Glebę w wazonach nawodniono do poziomu 60% całkowitej pojemności wodnej i inkubowano przez 4 miesiące. Analizy obejmowały oznaczenie: ogólnej liczebności bakterii i grzybów, liczebności bakterii celulolitycznych oraz aktywności respiracyjnej i dehydrogenaz, a także poziomu metali ciężkich. Stwierdzono, że osad ścieków mleczarskich istotnie wpływał na właściwości gleby. Korzystnie oddziaływał na mikrobiologiczne właściwości gleby. Zastosowane dawki (1; 2,5% • kg-1) osadu higienizowanego popiołem węglowym stymulowały rozwój bakterii i grzybów w glebie. Osad ścieków mleczarskich spowodował zahamowanie aktywności dehydrogenaz i stymulację aktywności respiracyjnej gleby. Wprowadzenie osadu spowodowało nieistotny wzrost zawartości metali ciężkich w badanej glebie, który był znacznie niższy niż przewidują dopuszczalne normy.

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Changes in Microbiological Activity of Soils Fertilised with Varied Doses of Sludge from a Dairy Sewage Treatment Plant

84%

Frąc M. , Jezierska-Tys S.

Ecological Chemistry and Engineering. A

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2009

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tom Vol. 16, nr 10

1273-1282

EN

The influence of dairy sewage sludge on some microbiological characteristics was studied. The experiment was carried out in laboratory conditions. Microbiological analyses were following: respiration activity and numbers of some groups of microorganisms. Different doses of dairy sewage sludge were applied into brown and grey-brown podzolic soils. The effect of the sludge on the microbial groups under study depended on the dose of the sludge, on the type of soil, and on the kind of microbiological parameter.

PL

Celem przeprowadzonych badań była ocena wpływu zróżnicowanych dawek osadu ścieków mleczarskich na kształtowanie się liczebności wybranych grup drobnoustrojów i aktywności respiracyjnej w glebie brunatnej i płowej. Modelowe badania laboratoryjne przeprowadzono na dwóch różnych typach gleb (brunatnej i płowej). Analizy mikrobiologiczne wykonywane okresowo w czasie trwania doświadczenia obejmowały oznaczenie aktywności respiracyjnej i liczebności wybranych grup mikroorganizmów glebowych. Oddziaływanie osadu z oczyszczalni ścieków mleczarskich na badane grupy drobnoustrojów zależało od ilości dawki odpadu, typu gleby oraz rodzaju parametru mikrobiologicznego.