当前位置: X-MOL 学术Environ. Technol. Innov. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Anaerobic biological treatment of EG/PG water-soluble copolymer coupled with down-flow hanging sponge reactor
Environmental Technology & Innovation ( IF 7.1 ) Pub Date : 2020-12-16 , DOI: 10.1016/j.eti.2020.101325
Takahiro Watari , Osamu Wakisaka , Yuya Sakai , Yuga Hirakata , Daisuke Tanikawa , Masashi Hatamoto , Fuminori Yoneyama , Takashi Yamaguchi

Water-soluble copolymers such as polyvinylpyrrolidone and polyvinyl alcohol have been widely used as detergents, paints, and chemical intermediates in many industrial processes, leading to environmental concerns associated with high-volume organic compound wastewater. Therefore, in this study, a combined upflow anaerobic sludge blanket (UASB) reactor and downflow hanging sponge (DHS) biosystem has been applied for the treatment of synthetic water-soluble copolymer wastewater. Copolymer consisted of ethylene glycol and propylene glycol with a total molecular weight of 8,500, commonly preferred in the automobile parts processing factory, were included in influent. Overall, the whole UASB–DHS system achieved a favorable chemical oxygen demand (COD) removal efficiency of 86% ± 7%. In more detail, with an organic loading rate of 2.12 kg-COD m−3 day −1, the UASB reactor enhanced the biodegradability of wastewater, and reached COD removal efficiency of 61% ± 16%. Meanwhile, gel permeation chromatography analysis indicated that the molecular weight of the wastewater was primarily reduced in the DHS reactor. In addition, massive 16S rRNA gene sequencing showed that polyethylene-glycol-degrading bacteria Pelobacter sp. was predominant in the UASB granular sludge.



中文翻译:

EG / PG水溶性共聚物的厌氧生物处理及下流式悬挂式海绵反应器

水溶性共聚物(例如聚乙烯吡咯烷酮和聚乙烯醇)已在许多工业过程中广泛用作清洁剂,油漆和化学中间体,这导致了与大量有机化合物废水相关的环境问题。因此,在这项研究中,组合的上流厌氧污泥毯(UASB)反应器和下流悬海绵(DHS)生物系统已用于处理合成水溶性共聚物废水。进水包括共聚物,该共聚物由总分子量为8,500的乙二醇和丙二醇组成,在汽车零件加工厂中通常是优选的。总体而言,整个UASB–DHS系统的化学需氧量(COD)去除效率达到86% ± 7%。更详细地讲,有机负荷率为2.12 kg-CODm -3-1天,UASB反应器提高了废水的生物降解能力,COD去除效率达到61% ± 16%。同时,凝胶渗透色谱分析表明,在DHS反应器中废水的分子量主要降低。此外,大量的16S rRNA基因测序表明,聚乙二醇降解细菌Pelobacter sp。在UASB颗粒污泥中占主导地位。

更新日期:2020-12-30
down
wechat
bug