Post-treatment of anaerobic reactor effluent for reuse using a triple filtration system

This study evaluated the triple filtration technology efficiency as a post-treatment of anaerobic reactor effluent. This study was carried out employing different concentrations of ferric chloride as coagulant and peracetic acid or calcium hypochlorite as oxidant. The filtration rates used were 150 ...

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Bibliographic Details
Published in:	Journal of environmental management Vol. 233; pp. 76 - 82
Main Authors:	da Silva, Cleber Pinto, Pedroso, Carlos Raphael, Zarpellon, Diogo Ingles, Machado Filho, José Geraldo, Sousa Vidal, Carlos Magno, Zimmermann, Ciro Maurício, de Campos, Sandro Xavier
Format:	Journal Article
Language:	English
Published:	England Elsevier Ltd 01-03-2019
Subjects:	Coagulation Oxidation Post-treatment Reuse Triple filtration Oxidation Post-treatment Triple filtration Coagulation Reuse
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Summary:	This study evaluated the triple filtration technology efficiency as a post-treatment of anaerobic reactor effluent. This study was carried out employing different concentrations of ferric chloride as coagulant and peracetic acid or calcium hypochlorite as oxidant. The filtration rates used were 150 m3/m2 d and 120 m3/m2 d. The efficiency of the system was evaluated through physicochemical and microbiological parameters. The best conditions found were those using 20 mg/L ferric chloride, 120 m3/m2 d filtration rate and 0.8 and 1.6 mg/L free chlorine. These conditions resulted in turbidity <1.0 NTU, Total Organic Carbon <1.5 mg/L, Chemical Oxygen Demand <1.0 mg/L, Biochemical Oxygen Demand <1.0 mg/L, in addition 100% removal of Total Phosphorus and Linear Alkylate Sulfonate. The post-oxidation process promoted inactivation of 100% Total Coliforms and E. coli. The post-treatment was able to produce effluent with characteristics that enable its urban, damming, creation and maintenance of wetlands, industrial and agricultural reuse proposed by USEPA. •The triple filtration process was effective for COD, BOD and TOC removal.•Post-treatment by triple filtration removes 100% phosphorus and LAS.•Post-oxidation process promoted inactivation of 100% Total Coliforms and E. coli.•The triple filtration meets various reuse classes according to US-EPA guidelines.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0301-4797 1095-8630
DOI:	10.1016/j.jenvman.2018.12.030