화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.34, No.9, 2397-2405, September, 2017
DOI10.1007/s11814-017-0144-8  Export Citation
Pretreatment of piggery digestate wastewater by ferric-carbon micro-electrolysis under alkalescence condition
Jiangang Che1, Jinbao Wan1, †, Xueping Huang1, 2, Rongwei Wu1, and Kun Liang1
  • 1Key Laboratory of Poyang Lake Environmental and Resource Utilization, Ministry of Education, School of Resources Environmental and Chemistry Engineering, Nanchang University, Nanchang 330047, P. R. China
  • 2Department of Civil Engineering and Architecture, Nanchang Institute of Technology, Nanchang 330029, P. R. China
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Due to the low COD/TN ratio, piggery digestate wastewater is non-biodegradable and pathogenic; its advanced treatment is becoming a wide-spread environmental concern. In this study, the process of Fe-C micro-electrolysis was applied to pretreat piggery digestate wastewater. Fe-C micro-electrolysis was confirmed effectively to enhance biodegradability of the piggery digestate wastewater. Response surface methodology (RSM) was employed to study the interactions between factors and optimize operating parameters. The optimum conditions for Fe-C micro-electrolysis were found to be 150 g/L of dosages of Fe-C particles, 6 L/h of aeration rate and 9 h of hydraulic retention time at pH 7.6, respectively. Under these conditions, the obtained chemical oxygen demand (COD) removal efficiency was 52.62%, and the ratio of BOD/COD increased from 0.13 to 0.285, which showed improvement of biochemical property. Furthermore, SEM analysis indicated the surface configuration of Fe-C particles. More important, this process could effectively pretreat the piggery digestate wastewater and avoid the generation of secondary pollution.
Keywords:Piggery Digestate Wastewater;Ferric-carbon Micro-electrolysis;Response Surface Methodology;Alkalescence Condition
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