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Application of hybrid electrocoagulation-filtration methods in the pretreatment of marine aquaculture wastewater

Water science and technology, 2021-03, Vol.83 (6), p.1315-1326 [Peer Reviewed Journal]

Copyright IWA Publishing Mar 2021 ;ISSN: 0273-1223 ;EISSN: 1996-9732 ;DOI: 10.2166/wst.2021.044 ;PMID: 33767038

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Title:
Application of hybrid electrocoagulation-filtration methods in the pretreatment of marine aquaculture wastewater
Author: Xu, Jianping ; Du, Yishuai ; Qiu, Tianlong ; Zhou, Li ; Li, Ye ; Chen, Fudi ; Sun, Jianming
Subjects: Ammonia ; anode combination mode ; Anodes ; Aquaculture ; Aquaculture effluents ; Aquaculture techniques ; Capacity ; Chemical oxygen demand ; Continuous flow ; Current density ; ec–filtration system ; Efficiency ; Electrocoagulation ; Electrodes ; Energy consumption ; Experiments ; Filtration ; Iron ; Marine aquaculture ; Nitrogen ; Nitrogen dioxide ; Oxygen requirement ; Pollutants ; Polyculture (aquaculture) ; Pore size ; Power supply ; Pretreatment ; recirculating aquaculture system ; Recirculating aquaculture systems ; Waste Disposal, Fluid ; Waste Water ; Wastewater ; Water Purification ; Water quality ; Water treatment
Is Part Of: Water science and technology, 2021-03, Vol.83 (6), p.1315-1326
Description: The aim of this study was to provide technical means and data support for enhancing the filtration pretreatment capacity of a recirculating aquaculture system. A continuous flow electrocoagulation (EC)-filtration system was designed and its application in the pretreatment of marine aquaculture wastewater was studied. The influences of anode combination modes, hydraulic retention times (HRTs) of the EC reactor and filter pore sizes on the water treatment capacity were investigated. Results showed that EC could significantly enhance the treatment efficiency of the filtration equipment used in subsequent steps. Al-Fe electrodes used as anode led to better processing capacity of this system, and the optimum anode was 3Al + Fe. With the increase of HRT and decrease of filter pore size, the enhanced effect of the EC process on the filter was more obvious. When the current density was 19.22 A/m , the anode was 3Al + Fe, the HRT was 4.5 min and the filter pore size was 45 μm, the removal efficiency of the system for Vibrio, chemical oxygen demand, total ammonia nitrogen, nitrite nitrogen (NO -N), nitrate nitrogen (NO -N) and total nitrogen was 69.55 ± 0.93%, 48.99 ± 1.42%, 57.06 ± 1.28%, 34.09 ± 2.27%, 18.47 ± 1.88% and 55.26 ± 1.42%, respectively, and the energy consumption was (26.25 ± 4.95) × 10 kWh/m .
Publisher: England: IWA Publishing
Language: English
Identifier: ISSN: 0273-1223
EISSN: 1996-9732
DOI: 10.2166/wst.2021.044
PMID: 33767038
Source: MEDLINE
ProQuest Central
DOAJ Directory of Open Access Journals

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Application of hybrid electrocoagulation-filtration methods in the pretreatment of marine aquaculture wastewater

Copyright IWA Publishing Mar 2021 ;ISSN: 0273-1223 ;EISSN: 1996-9732 ;DOI: 10.2166/wst.2021.044 ;PMID: 33767038

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