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Titolo:
Anaerobic treatment of atrazine bearing wastewater
Autore:
Ghosh, PK; Philip, L; Bandyopadhyay, M;
Indirizzi:
Indian Inst Technol, Dept Civil Engn, Kharagpur 721302, W Bengal, India Indian Inst Technol Kharagpur W Bengal India 721302 1302, W Bengal, India
Titolo Testata:
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
fascicolo: 3, volume: 36, anno: 2001,
pagine: 301 - 316
SICI:
0360-1234(2001)36:3<301:ATOABW>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRIAZINE HERBICIDES; S-TRIAZINES; DEGRADATION; BIODEGRADATION; MINERALIZATION; PSEUDOMONAS; METABOLITES; PERSISTENCE; NEBRASKA; WATER;
Keywords:
atrazine; anaerobic degradation; mixed culture; pesticide; biodegradation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Philip, L Indian Inst Technol, Dept Civil Engn, Kharagpur 721302, W Bengal, India Indian Inst Technol Kharagpur W Bengal India 721302 ngal, India
Citazione:
P.K. Ghosh et al., "Anaerobic treatment of atrazine bearing wastewater", J ENVIR S B, 36(3), 2001, pp. 301-316

Abstract

Performance of mixed microbial anaerobic culture in treating synthetic wastewater with high Chemical Oxygen Demand (COD) and varying atrazine concentration was studied. Performance of hybrid reactors with wood charcoal as adsorbent, with a dose of 10 g/l and 40 g/l, along with the microbial mass was also studied. All the reactors were operated in sequential mode with Hydraulic Retention Time (HRT) of 5 days. In all the cases, COD removal after 5days was found to be above 81%. Initial COD was above 1000 mg/l. From a hybrid reactor COD removal after 2 days was observed to be 90%. Atrazine reduction after 5 days by microbial mass alone was 43.8%, 40% and 33.2% with aninitial concentration of 0.5, 1.0 and 2.0 mg/l respectively. MLSS on all the cases were almost same. Increasing MLSS concentration by about 2 fold did not increase the atrazine removal efficiency significantly. Maximum atrazine removal was observed to be 64% from the hybrid reactor with 10 g/l of wood charcoal and 69.4% from the reactor with 40 g/l of wood charcoal. Atrazine removal from the hybrid reactors after 15 days were observed to be 35.7% and 38.7%, which showed that the higher dose of wood charcoal in hybrid reactor did not improve the atrazine removal efficiency significantly. Specific methanogenic activity test showed no inhibitory effect of atrazine on methane producing bacteria. The performance of anaerobic microorganisms in removing atrazine with no external carbon source and inorganic nitrogen source was studied in batch mode. With an initial concentration of 1.0 mg/l, reduction of atrazine by the anaerobic microorganisms in absence of external carbon source after 35 days was observed to be 61.8% where as in absence ofexternal carbon and inorganic nitrogen source the reduction was only 44.2%after 150 days. Volatilization loss of atrazine was observed to be insignificant.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/10/20 alle ore 03:43:33