Combination of catalytic ozonation by regenerated granular activated carbon (rGAC) and biological activated carbon in the advanced treatment of textile wastewater for reclamation 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Chemosphere: Environmental toxicology and risk assessment
年/卷/期
2019 / 231 / Sep.
页码
369-377
ISSN号
0045-6535
作者单位
Tsinghua Univ, Grad Sch Shenzhen, Key Lab Microorganism Applicat & Risk Control She, Guangdong Prov Engn Res Ctr Urban Water Recycling, Shenzhen 518055, Peoples R China|Tsinghua Univ, Environm Simulat & Pollut Control State Key Joint, State Environm Prote;Tsinghua Univ, Environm Simulat & Pollut Control State Key Joint, State Environm Protect Key Lab Microorganism Appl, Beijing 100084, Peoples R China|Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China;Tsinghua Univ, Grad Sch Shenzhen, Key Lab Microorganism Applicat & Risk Control She, Guangdong Prov Engn Res Ctr Urban Water Recycling, Shenzhen 518055, Peoples R China|Tsinghua Univ, Environm Simulat & Pollut Control State Key Joint, State Environm Prote;Zhejiang Univ, Coll Environm & Resource Sci, Hangzhou, Zhejiang, Peoples R China;Tsinghua Univ, Grad Sch Shenzhen, Key Lab Microorganism Applicat & Risk Control She, Guangdong Prov Engn Res Ctr Urban Water Recycling, Shenzhen 518055, Peoples R China|Tsinghua Univ, Environm Simulat & Pollut Control State Key Joint, State Environm Prote;Tsinghua Univ, Environm Simulat & Pollut Control State Key Joint, State Environm Protect Key Lab Microorganism Appl, Beijing 100084, Peoples R China|Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China;Tsinghua Univ, Environm Simulat & Pollut Control State Key Joint, State Environm Protect Key Lab Microorganism Appl, Beijing 100084, Peoples R China|Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China;Tsinghua Univ, Grad Sch Shenzhen, Key Lab Microorganism Applicat & Risk Control She, Guangdong Prov Engn Res Ctr Urban Water Recycling, Shenzhen 518055, Peoples R China;
作者
Wang, Wen-Long;Hu, Hong-Ying;Liu, Xin;Shi, Hui-Xiang;Zhou, Tian-Hui;Wang, Chun;Huo, Zheng-Yang;Wu, Qian-Yuan;
摘要
Wastewater reclamation in the textile industry has attracted considerable attention. In this study, catalytic ozonation by regenerated granular activated carbon (rGAC) and its combination with biological activated carbon (BAC) was investigated for the reclamation of a real bio-treated dyeing and finishing wastewater (BDFW). Catalytic ozonation by rGAC (O-3/rGAC) was 1.6-2.0 times more efficient than ozonation alone for pollutants degradation. Although iron oxide loaded rGAC (rGAC-Fe) improved the performance of catalytic ozonation by 14%-25%, but was labile (<2 days) compared to stable rGAC (>20 days). Catalytic ozonation improved the generation of (OH)-O-center dot, contributing 1.1-1.7 times faster of chromophores decomposition and 0.24-0.55 times more increase of biodegradability than ozonation. However, catalytic ozonation increased the acute toxicity of BDFW by two times. The combination of O-3/rGAC and BAC can synergistically reduce COD, chromophores, and color in BDFW during 45-day's continuous operation, the improvements than O-3/rGAC being 21.0%, 18.8%, and 13.6%, respectively. Moreover, although O-3/rGAC of BDFW increased the toxicity from 98.3 to 146.5 mu g-HgCl2/L, post BAC significantly reduced the toxicity to 13.1 mu g-HgCl2/L. Engineering practice of water reclamation by O-3/rGAC-BAC was approved to be feasible based on both the water quality of treated water and the operation cost. (C) 2019 Elsevier Ltd. All rights reserved.
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关键词/主题词
Textile wastewater;Catalytic ozonation;Biological activated carbon;Wastewater reclamation;Toxicity;Operation cost;
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