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Titolo:
Nutrient addition to enhance biological treatment of greywater
Autore:
Jefferson, B; Burgess, JE; Pichon, A; Harkness, J; Judd, SJ;
Indirizzi:
Cranfield Univ, Sch Water Sci, Cranfield MK43 0AL, Beds, England CranfieldUniv Cranfield Beds England MK43 0AL ld MK43 0AL, Beds, England
Titolo Testata:
WATER RESEARCH
fascicolo: 11, volume: 35, anno: 2001,
pagine: 2702 - 2710
SICI:
0043-1354(200108)35:11<2702:NATEBT>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACTIVATED-SLUDGE PROCESS; OPERATION; PLANTS; GROWTH;
Keywords:
greywater; nutrient addition; microorganisms; micronutrients; trace metals;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Judd, SJ Cranfield Univ, Sch Water Sci, Cranfield MK43 0AL, Beds, England Cranfield Univ Cranfield Beds England MK43 0AL AL, Beds, England
Citazione:
B. Jefferson et al., "Nutrient addition to enhance biological treatment of greywater", WATER RES, 35(11), 2001, pp. 2702-2710

Abstract

This study compares the chemical oxygen demand (COD) removal and respiration rates of a microbial population treating real and synthetic greywaters dosed with nutrient supplements. The nutrient composition of the real and synthetic greywaters was analysed and the dosing regime for nitrogen, phosphorus and a range of trace metals planned accordingly. The doses consisted ofeight single additives (macronutrients and trace metals) to the control greywater and six trace metal additions to C:N:P balanced greywater. The COD removal for the control real and synthetic greywater in lab-scale activatedsludge systems (0.038 and 0.286 kg COD kg MLSS-1 d(-1). respectively) confirmed nutrient limitation and the poor degree of greywater treatment. Nutrient dosing increased the COD removal rate and oxygen uptake rate in many cases. The greatest stimulation of microbial activity was observed with zinc additions lo C:N:P balanced real greywater (1.291 kg COD kg MLSS-1 d(-1) over 30 times the control). Inhibitory effects to various extents were rare and limited mainly to the additions of metals to synthetic greywater. The dominance of chemicals effects was observed on addition of some micronutrients: notably iron and aluminium, metals on which many coagulants for use in biotreatment of other wastewaters are based. The data indicate that the impact of understanding microbial processes and the nutrients required For wastewater treatment can only serve to optimise process efficiency for the proposed treatment of greywater. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 07:46:03