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Titolo:
Chlorine demand and bacteria of low salinity shrimp pond sediment treated with different chlorine doses
Autore:
Lin, HCK;
Indirizzi:
Asian Inst Technol, Sch Environm, Agr & Aquat Syst & Engn Program, Klongluang 12120, Pathumthani, Thailand Asian Inst Technol Klongluang PathumthaniThailand 12120 mthani, Thailand
Titolo Testata:
AQUACULTURAL ENGINEERING
fascicolo: 3, volume: 25, anno: 2001,
pagine: 165 - 174
SICI:
0144-8609(200110)25:3<165:CDABOL>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
AQUACULTURE; WATER;
Keywords:
chlorine demand; indigenous bacteria; organic carbon; nitrogenous compound; shrimp pond;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Lin, HCK Asian Inst Technol, Sch Environm, Agr & Aquat Syst & Engn Program, POB 4, Klongluang 12120, Pathumthani, Thailand Asian Inst Technol POB 4 Klongluang Pathumthani Thailand 12120 nd
Citazione:
H.C.K. Lin, "Chlorine demand and bacteria of low salinity shrimp pond sediment treated with different chlorine doses", AQUACULT EN, 25(3), 2001, pp. 165-174

Abstract

An experiment was conducted to determine the chlorine demand and the efficacy of three chlorine doses to disinfect indigenous bacteria in the sediment of a shrimp (Penaeus monodon Fabricius) pond. Sediment cores were collected by inserting 48 PVC tubes 20 cm into the pond and these tubes were planted vertically into four circular concrete tanks containing clay soil. Sediment in those tubes were treated with active chlorine in overlying water at 300, 1200 and 2400 mg l(-1) as treatments. The residual chlorine concentration in each tube was determined at 0, 6, 24, 48, and 144 h and the chlorinedemand of the sediment was calculated by the, difference between initial dose and total residual chlorine. Chlorine efficacy to bacteria resided in the sediment was determined at a depth of 0-0.3, 0.9-1.2 and 1.9-2.1 cm in each core. Organic carbon, pH, and total Kjedhal nitrogen (TKN) in sediment were analyzed at the initial and end of experiment. Chlorine demand of sediment was 0.48 kg m(-2). Both organic carbon and TKN contributed to the lossof chlorine in the sediment. Chlorine at a dose of 300 mg l(-1) did not completely inactivate bacteria despite its free and residual chlorine in overlying water at the end of experiment still remained at 20 mg l(-1). Chlorine at a dose of 1200 and 2400 mg l(-1) inactivated 100% bacteria within 2 days of contact time. With high chlorine dose, chlorination was effective to inactivate bacteria only to a depth of 2.1 cm. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 13:54:33