Laboratory trial and full-scale implementation of integrated anaerobic-aerobic treatment for high strength acrylic acid wastewater

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作者
Show, Kuan-Yeow [1 ]
Yan, Yue-Gen [1 ]
Zhao, Jian [1 ]
Shen, Jie [1 ]
Han, Zhong-Xu [1 ]
Yao, Hai-Yong [1 ]
Lee, Duu-Jong [2 ,3 ]
机构
[1] Puritek Research Institute, Puritek Co. Ltd., Nanjing, China
[2] Department of Chemical Engineering, National Taiwan University, Taipei,10617, Taiwan
[3] Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei,10607, Taiwan
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Chemical oxygen demand;
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摘要
Sustainable treatment of highly polluting industrial wastewaters poses a challenge to many municipalities. This study presented treatment of a high strength inhibitory acrylic acid wastewater by integrated anaerobic-aerobic processes. A novel scheme integrating anaerobic granular sludge blanket (GSB) reactor, aerobic carrier biofilm (CBR) reactor and activated sludge reactor (ASR) was tested. The laboratory trial showed that the GSB was able to degrade exceptionally high chemical oxygen demand (COD up to 32,420 mg/L) acrylic acid wastewater laden with 5% waste oil. Operated under a high volumetric loading (VLR) rate of 21.6 g/L·d, the integrated GSB-CBR-ASB achieved 99% of COD removal, of which 90% were removed by the anaerobic process and 9% by the aerobic processes. Full-scale implementation indicated comparable performance with overall removal up to 99%, thus meeting the discharge limits of 500 mg COD/L of public sewer. The integrated scheme was effective in which the anaerobic GSB functioning as a prime degrader that degraded most of the pollutants, while the aerobic CBR-ASB serving as a polisher that removed the remaining COD. With adequate microbial acclimation and granulation, the novel integrated scheme offers a resilient and robust treatment system for high strength inhibitory acrylic acid wastewater. © 2020 Elsevier B.V.
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