An integrated biological-electrocatalytic process for highly-efficient treatment of coking wastewater

被引：36

作者：

Wu, Zhen-Yu ^{[1
]}

Zhu, Wei-Ping ^{[1
]}

Liu, Yang ^{[1
]}

Zhou, Lu-Lu ^{[1
]}

Liu, Peng-Xi ^{[1
]}

Xu, Juan ^{[1
,2
]}

机构：

[1] East China Normal Univ, Sch Ecol & Environm Sci, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, Zhejiang Tiantong Forest Ecosyst Natl Observat &, Shanghai, Peoples R China

[2] Inst Ecochongming IEC, 20 Cuiniao Rd, Shanghai 202162, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2021年 / 339卷 / 339期

基金：

中国国家自然科学基金;

关键词：

Coking wastewater; Biological-electrocatalytic system; Three-dimensional biofilm electrode reactor; Biological aerated filter; REMOVAL; PERFORMANCE; REACTOR; NITROGEN; BIOFILM; SYSTEM; DENITRIFICATION; DEGRADATION; OZONATION; PRODUCTS;

D O I：

10.1016/j.biortech.2021.125584

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Coking wastewater is typically refractory, mainly due to its biological toxicity and complex composition. In this study, a novel integrated biological-electrocatalytic process consisting of two three-dimensional electrochemical reactors (3DERs), two biological aerated filters (BAFs), and a three-dimensional biofilm electrode reactor (3DBER) is developed for the advanced treatment of coking wastewater. 73.21% of chemical oxygen demand (COD), 38.02% of ammonium nitrogen (NH4+-N) and 91.46% of nitrate nitrogen (NO3--N) are removed by 3DERs. BAFs mainly convert NH4+-N to NO3--N through microbial nitrification. The 3DBER removes the residual NO3--N by bio-electrochemical denitrification. The integrated system can eliminate 74.72-83.27% of COD, 99.38-99.74% of NH4+-N, and 69.64-99.83% of total nitrogen from coking wastewater during the continuous operation, as well as significantly reducing the toxicity of the wastewater. The superiorities of the integrated 3DERs/BAFs/3DBER system recommend the application of such biological-electrocatalytic technology in the treatment of highly toxic wastewater.

引用

页数：8

共 43 条

[1] Exploring the the relationship between the EPS property and the toxicity of sludge for treating 4-chlorophenol synthetic wastewater in a sequencing batch reactor [J].