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Titolo:
TEMPERATURE-PHASED ANAEROBIC-DIGESTION OF WASTE-WATER SLUDGES
Autore:
HAN Y; SUNG SW; DAGUE RR;
Indirizzi:
PARSONS ENGN SCI INC,SUITE 500,57 EXECUT PK S NE ATLANTA GA 30329 IOWA STATE UNIV SCI & TECHNOL,DEPT CIVIL & CONSTRUCT ENGN AMES IA 50011
Titolo Testata:
Water science and technology
fascicolo: 6-7, volume: 36, anno: 1997,
pagine: 367 - 374
SICI:
0273-1223(1997)36:6-7<367:TAOWS>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Keywords:
COLIFORM; METHANE; PRIMARY SLUDGE; THERMOPHILIC DIGESTION; VOLATILE SOLIDS; WASTE ACTIVATED SLUDGE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
10
Recensione:
Indirizzi per estratti:
Citazione:
Y. Han et al., "TEMPERATURE-PHASED ANAEROBIC-DIGESTION OF WASTE-WATER SLUDGES", Water science and technology, 36(6-7), 1997, pp. 367-374

Abstract

The temperature-phased anaerobic bioreactor (TPAB) has been under study by Dague and co-workers at Iowa State University. The temperature-phased approach involves a two-stage reactor system with the first stage operated at a thermophilic temperature (commonly 55 degrees C) and the second stage operated at a mesophilic temperature (commonly 35 degrees C). The purpose of laboratory study was to compare the performanceof the temperature-phased system with the conventional single-stage mesophilic system for treating mixtures of primary and waste activated sludge. Of particular interest in the research was a comparison of thetwo systems from the standpoint of coliform reduction, volatile solids (VS) destruction, and biogas production. The temperature-phased system achieved complete destruction of total and fecal coliforms over a range of SRTs from 11 to 28 days. The concentration of fecal coliforms in the effluent from the temperature-phased system never exceeded 1000MPN/g total solids (TS), which can meet the U.S. Code of Federal Regulations, Title 40 (40 CFR), Part 503 coliform requirements for Class Asludge. At the optimal SRTs ranging from 11 to 17 days, the capacity of VS removal of temperature-phased system was more than double that of the conventional single-stage system. The foaming problem associatedwith the digestion of waste activated sludge was eliminated. (C) 1997IAWQ. Published by Elsevier Science Ltd.

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Documento generato il 24/09/20 alle ore 10:14:11