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Titolo:
FEASIBILITY OF USING PRIMARY-SLUDGE MESOPHILIC HYDROLYSIS FOR BIOLOGICAL, REMOVAL OF NITROGEN AND PHOSPHORUS FROM WASTE-WATER
Autore:
CANZIANI R; POLLICE A; RAGAZZI M;
Indirizzi:
POLITECN MILAN,DIIAR,SEZ AMBIENTALE,PIAZZA LEONARDO DA VINCI 32 I-20133 MILAN ITALY
Titolo Testata:
Bioresource technology
fascicolo: 3, volume: 54, anno: 1995,
pagine: 255 - 260
SICI:
0960-8524(1995)54:3<255:FOUPMH>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANAEROBIC ACIDOGENESIS; SOLUBILIZATION; FERMENTATION;
Keywords:
HYDROLYSIS; FERMENTATION; MESOPHILIC; NUTRIENT REMOVAL; PRIMARY SLUDGE; RBCOD; ACTIVATED SLUDGE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
R. Canziani et al., "FEASIBILITY OF USING PRIMARY-SLUDGE MESOPHILIC HYDROLYSIS FOR BIOLOGICAL, REMOVAL OF NITROGEN AND PHOSPHORUS FROM WASTE-WATER", Bioresource technology, 54(3), 1995, pp. 255-260

Abstract

This work was suggested by the general lack of information regarding practical design aspects of a process widely studied at both theoretical and experimental levels, primary-sludge hydrolysis. The availability of sufficient amounts of readily biodegradable organic substrates isa crucial aspect of biological nutrient-removal processes. These substrates can be provided to biomasses either by dosing chemicals, or by exploiting internal carbon sources of the system. Hydrolysis allows for the conversion of particulate and soluble, slowly degradable fractions of primary sludge into readily biodegradable substrates, such as short-chain fatty acids. In order to evaluate the technical and economical feasibility of the process under mesophilic conditions, the generalcase of a medium-size wastewater treatment plant (100 000 PE) was considered. Given a typical domestic savage, the production of readily biodegradable COD (RBCOD) via primary sludge hydrolysis was assessed under two different conditions. The effects of hydrolysate addition on nutrient removal efficiencies were also evaluated. Results show potential substrate productions of about 250-600 kgRBCOD day(-1) depending on process conditions. Denitrification efficiency after addition of this internal carbon source was found to increase by 4-10% with respect to the influent total nitrogen. Cost is competitive with respect to current Italian costs for reagents.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 23:13:11