Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Microbial competition for the organic substrates and its impact on EBPR systems under conditions of changing carbon feed
Autore:
Carucci, A; Kuhni, M; Brun, R; Carucci, G; Koch, G; Majone, M; Siegrist, H;
Indirizzi:
Univ Rome La Sapienza, Dept Hydraul Engn, I-00184 Rome, Italy Univ Rome LaSapienza Rome Italy I-00184 draul Engn, I-00184 Rome, Italy SwissdFed Inst Envirionm Sci & Technol EAWAG, CH-8600 Dubendorf, Switzerlan Swiss Fed Inst Envirionm Sci & Technol EAWAG Dubendorf Switzerland CH-8600 Swiss Fed Inst Technol ETH, CH-8600 Dubendorf, Switzerland Swiss Fed Inst Technol ETH Dubendorf Switzerland CH-8600 rf, Switzerland Univ La Sapienza, Dept Chem, I-00185 Rome, Italy Univ La Sapienza Rome Italy I-00185 enza, Dept Chem, I-00185 Rome, Italy
Titolo Testata:
WATER SCIENCE AND TECHNOLOGY
fascicolo: 1, volume: 39, anno: 1999,
pagine: 75 - 85
SICI:
0273-1223(1999)39:1<75:MCFTOS>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
BIOLOGICAL PHOSPHORUS REMOVAL; SEQUENCING BATCH REACTOR; AEROBIC ACTIVATED-SLUDGE; PHOSPHATE REMOVAL; BIOCHEMICAL-MODEL; WASTE-WATER; GLYCOGEN; DYNAMICS;
Keywords:
anaerobic storage; carbon feed; effluent phosphate load; enhanced biological phosphorous removal; metabolic pathways; sequencing batch reactor; wastewater treatment plant;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Carucci, A UnivItaly La Sapienza, Dept Hydraul Engn, Via Eudossiana 18, I-00184 Rome, Univ Rome La Sapienza Via Eudossiana 18 Rome Italy I-00184 me,
Citazione:
A. Carucci et al., "Microbial competition for the organic substrates and its impact on EBPR systems under conditions of changing carbon feed", WATER SCI T, 39(1), 1999, pp. 75-85

Abstract

A deep insight into the mechanisms for the anaerobic storage of organic substrates is gained in lab-scale experiments with a Sequencing Batch Reactor. In addition to accepted models using polyphosphate (PP) hydrolysis to take up acetate and store polyhydroxyalkanoates (PHAs), with EBPR ("PAO-like metabolism") on the one hand, and using glycogen to take up different substrates, storing PHAs as well, without EBPR ("GAO-like metabolism") on the other hand, other pathways have to be considered. Under anaerobic conditions, glucose can be taken up directly and transferred to glycogen as the storagecompound. The organisms can use PP hydrolysis (with EBPR) or fermentation (gaining a competitive advantage) as the energy source. A conceptual model of the different anaerobic mechanisms is given at the end. It is worth pointing out that these mechanisms are assumed to be combined in real systems and possibly can explain the phenomena observed after starvation at a full-scale wastewater treatment plant for Enhanced Biological Phosphorus Removal (EBPR): after periods of low organic carbon loads the effluent phosphate issignificantly increased on the following 1-2 days. This is of both quantitative and qualitative relevance, because the average phosphate load in the effluent is increased by about 60% due to this effect. Periods with low CODinlet load lead to a complete cessation of the anaerobic phosphate releaseand to a subsequent decreased capacity for phosphate uptake. The effect ispartially reproduced by a mathematical single-storage compound model. The depletion of different metabolic pools, an imbalance in the (storage) pathways during and after the starvation of the phosphate accumulating organismsand the interaction of the EBPR with the denitrification that compete for the usable COD and nitrate are assumed to be responsible for these observations. (C) 1999 IAWQ Published by Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 02:15:24