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(under 1.5 mg/L) the toxic effect on oxygen pesticides are not considered substrates of
uptake of activated sludge is not significant easily decomposable, however these chem-
however if the pesticide concertation exceeds icals can also be decomposed applying
the 3.0 mg/L the toxic effect considerably in- longer residence time in biological systems
creases therefore the rate of decomposition of activated sludge.
is fairly reduced. The most toxic effect was
measured in the case of dieldrin. The oxygen IRODALOMJEGYZÉK
uptake rate (OUR) at 1.5 mg/L dieldrin con-
centration was 180 mg COD/g.h., however at 1. internet. Mészáros Éva: Tetra-és triklóretén talaj-
3.5 mg/L concertation the OUR decreased to víz-szennyezők lebontásában résztvevő anaerob mik-
60 mg COD/g.h. robaközösségek vizsgálata. Doktori értekezés
http://teo.elte.hu/minosites/ertekezes2015/mesza-
The biodegradability tests show that pesti- ros_e.pdf (letöltés ideje: 2019.05.27)
cides such as dicamba (dimethylamine salt), 2.internet. POP jellegű növényvédőszer-hulladékok
lasso (alachlor), acenit (acetochlor) and action Közép-Kelet Európa, Kaukázus és Közép-Ázsia orszá-
(atrazine) can readily be decomposed under gaiban
aerobic conditions. In the case of pesticides https://www.biokontroll.hu/pop-jelleg-noeveny-
examined if the residence time was 24 hours vedszer-hulladekok-koezep-kelet-europa-kauka-
the 5.0 mg/L initial concentration decreased zus-es-koezep-azsia-orszagaiban/ (letöltés ideje:
to 2.0 mg/L. Increasing residence time up to 2019.07.27)
30 hours the pesticides concentration in the Arora,P.K., and Bae, H. (2014): Bacterial degradation
effluent reduced to 1.0 mg/L. of chlorophenols and their derivatives Microbial Cell
Factories. 13: 31. Published online 2014 Mar 3. doi:
Based on our biodegrability measurements 10.1186/1475-2859-13-31
insecticides such as signal (cypermethrin), https://www.ncbi.nlm.nih.gov/pmc/articles/
mospilan (acetamiprid) and actra (thiameth- PMC3975901/ (letöltés ideje:2019.05.27)
oxamin) can be considered chemicals of eas- Atashgahi, S., Liebensteiner, M.G., Janssen, D.B., Smid-
ily degradable in the activated sludge system. t,H., Stams,A.J.M., Sipkema, D. (2018): Microbial Sy-
The 5.0 mg/L initial concentration of insec- nthesis and Transformation of Inorganic and Organic
ticides decreased to 0.1 and 1.0 mg/L at the Chlorine Compounds Frontiers in Microbiology., 12
residence time of 25 hours. December 2018 | Volume 9 |1 – 22, Article 3079
Field, J. A., Sierra, R. (2004): Review of scientific lite-
Thanks to EU regulation, the usage of applied rature on microbial dechlorination
chlorinated pesticides for example the aldrin and chlorination of key chlorinated compounds 12th
and the dieldrin are restricted or banned. Quarterly Report, 4th Quarter
Although the newly marketed and used Year 2003

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