Improvement of anaerobic biological treatment effect by catalytic micro-electrolysis for monensin production wastewater

Suqing Wu, Yuanfeng Qi, Chunzhen Fan, Bibo Dai, Jungchen Huang, Weili Zhou, Shengbing He, Lei Gao

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22 Citations (Scopus)


Monensin discharged with the animal wastes and wastewater can cause harmful effect to the environment and human health. In this study, catalytic micro-electrolysis (CME) reactor filled with novel catalytic-ceramic-filler was utilized as pretreatment to improve the anaerobic biological treatment effect for the real monensin wastewater. The CME reactor as a possible pretreatment process had satisfactory effect, with 98.44% of monensin residue and 37.07% of chemical oxygen demand (COD) removals at the optimum hydraulic retention time (HRT) of 3.0 h and dissolved oxygen (DO) of about 1.5 mg L-1. Subsequently, as the secondary biological treatment, the Up-FLOW Anaerobic Sludge Blanket (UASB) reactor treatment effect was greatly improved by the CME pretreatment, with approximately 80% of COD removal at the optimum organic loading rate (OLR) of 3.5 kg m-3 d-1, which had higher methane yield (about 0.33 m3 kg-1 COD-1) and lower volatile fatty acids (VFA) concentration (about 300 mg L-1) than that of the UASB reactor without pretreatment. Finally, an activated sludge (AS) reactor was utilized as the last biological treatment and the coupled CME-UASB-AS system had high COD and chroma removal (about 98% and 95%, respectively), the final effluent (COD and chroma of about 200 mg L-1 and 40, respectively) with no residual monensin met the national discharged standard, which provided a reliable system for the practical monensin production wastewater treatment.

Original languageEnglish
Pages (from-to)260-267
Number of pages8
JournalChemical Engineering Journal
Publication statusPublished - 2016 Jul 15

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering


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