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Titolo:
ANAEROBIC ACIDOGENESIS OF PRIMARY SLUDGE - THE ROLE OF SOLIDS RETENTION TIME
Autore:
ELEFSINIOTIS P; OLDHAM WK;
Indirizzi:
UNIV BRITISH COLUMBIA,DEPT CIVIL ENGN,ENVIRONM ENGN GRP VANCOUVER V6T1Z4 BC CANADA
Titolo Testata:
Biotechnology and bioengineering
fascicolo: 1, volume: 44, anno: 1994,
pagine: 7 - 13
SICI:
0006-3592(1994)44:1<7:AAOPS->2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
WASTE-WATER TREATMENT; DIGESTION; GLUCOSE; PHASE; ACIDIFICATION; TEMPERATURE; PH;
Keywords:
ANAEROBIC DIGESTION; ACID PHASE; VOLATILE FATTY ACIDS; BIODEGRADATION; SOLIDS RETENTION TIME; SLUDGE, PRIMARY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
P. Elefsiniotis e W.K. Oldham, "ANAEROBIC ACIDOGENESIS OF PRIMARY SLUDGE - THE ROLE OF SOLIDS RETENTION TIME", Biotechnology and bioengineering, 44(1), 1994, pp. 7-13

Abstract

This research investigates the effect of solids retention time (SRT) on the acid-phase anaerobic digestion of primary sludge. A series of experiments were conducted using two continuous-flow 3-L units with thefollowing configuration: a completely mixed reactor (CMR) with clarifier and solids recycle and an upflow anaerobic sludge blanket (UASB) reactor. Results show that C-2 to C-5 volatile fatty acids (VFA) were the predominant compounds formed. At a constant hydraulic retention time (HRT) of 12 h, variation in SRT from 10 to 20 days resulted in a slight increase in VFA production in both systems, but at a shorter SRT (5 days) a drastic drop in acid production was observed. In addition, the percent distribution of VFA was to some extent affected by the change in SRT. On the other hand, organic matter degradation [measured by the chemical oxygen demand (COD) specific solubilization rate or the percent volatile suspended solids (VSS) reduction] appeared to be independent of SRT, at least in the range investigated. The percent solubleCOD in the form of VFA, however, increased steadily with increasing SRT, approaching the 90% level at 20 days. The remaining soluble COD inthe effluent from these systems may be mainly attributed to metabolicintermediates and unused soluble substrate. (C) 1994 John Wiley and Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/09/20 alle ore 12:40:31