Improvement of the degradation of sulfate rich wastewater using sweetmeat waste (SMW) as nutrient supplement.
J Hazard Mater
; 300: 796-807, 2015 Dec 30.
Article
em En
| MEDLINE
| ID: mdl-26322967
ABSTRACT
External dosing of sweetmeat waste (SMW) dosing into exhausted upflow packed bed bioreactor (PBR) resulted in prompt reactivation of SO4(2-) removal. Different SMW concentrations in terms of chemical oxygen demand (COD)/SO4(2-) ratios (1, 2, 4 and 8) were introduced into four identical PBR where process stability was found within 3 weeks of operation. SO4(2-) removal was proportional to COD/SO4(2-) ratios up to 4 at which maximum sulfate removal (99%) was achieved at a rate of 607 mg/d. The value of COD consumptionSO4(2-)removal was much higher at ratio 4 than 8 whereas, ratio 2 was preferred over all. Net effluent acetate concentration profile and total microbial population attached to the reactor matrices were corresponding to COD/SO4(2-) ratio as 4>8>2>>1. Sulfate reducing bacteria (SRB) population was found to be inversely proportional to COD/SO4(2-) ratio in which acetate oxidizing SRB and fermentative bacteria were the dominant.
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Base de dados:
MEDLINE
Assunto principal:
Sulfatos
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Biodegradação Ambiental
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Indústria Alimentícia
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Eliminação de Resíduos Líquidos
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Resíduos Industriais
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article