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Titolo:
A MECHANICAL PRETREATMENT OF WASTE ACTIVATED-SLUDGE FOR IMPROVEMENT OF ANAEROBIC-DIGESTION SYSTEM
Autore:
HWANG KY; SHIN EB; CHOI HB;
Indirizzi:
KIST,ENVIRONM RES CTR,POB 131 SEOUL SOUTH KOREA HANYANG UNIV,DEPT CIVIL & ENVIRONM ENGN SEOUL 133791 SOUTH KOREA
Titolo Testata:
Water science and technology
fascicolo: 12, volume: 36, anno: 1997,
pagine: 111 - 116
SICI:
0273-1223(1997)36:12<111:AMPOWA>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Keywords:
ANAEROBIC DIGESTION; WASTE ACTIVATED SLUDGE-PRETREATMENT; CELL REPTURE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
11
Recensione:
Indirizzi per estratti:
Citazione:
K.Y. Hwang et al., "A MECHANICAL PRETREATMENT OF WASTE ACTIVATED-SLUDGE FOR IMPROVEMENT OF ANAEROBIC-DIGESTION SYSTEM", Water science and technology, 36(12), 1997, pp. 111-116

Abstract

This study evaluated the effectiveness of sewage pretreatment as it affected the subsequent anaerobic digestion of waste activated sludge (WAS). The key to this sludge pretreatment process was that microorganism cells within WAS were ruptured by mechanical jet and smash under pressurized conditions, 5-50 bar pressure. Cell rupture was estimated bysoluble protein concentration (SPC) because the cytoplasm of microorganisms is mainly composed of protein. The SPC in the WAS varied significantly before and after pretreatment. In particular, cell rupture increased from 6% to 43% with the increase of the pretreated pressure (5-30bar), volatile solids concentration and thickening time of WAS. In the WAS pretreatment with long-thickening time (12h < thickening time less than or equal to 48h), cell rupture was monitored 5-10 % higher than short-thickening time (Oh <thickening time less than or equal to 12h). Generally, it was observed that higher anaerobic digestion efficiencies of WAS could be obtained according to the increase of microorganism cell rupture through mechanical pretreatment of WAS. (C) 1997 IAWQ. Published by Elsevier Science Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 05:10:38