刘涛

个人信息Personal Information

副教授

硕士生导师

性别:男

毕业院校:哈尔滨工业大学

学位:博士

所在单位:环境学院

学科:环境工程. 环境科学. 市政工程

办公地点:环境楼607室

电子邮箱:taoliu@dlut.edu.cn

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Enhancing nitrogen removal efficiency in a dyestuff wastewater treatment plant with the IFFAS process: the pilot-scale and full-scale studies

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论文类型:期刊论文

发表时间:2018-01-01

发表刊物:WATER SCIENCE AND TECHNOLOGY

收录刊物:SCIE、PubMed、Scopus

卷号:77

期号:1

页面范围:70-78

ISSN号:0273-1223

关键字:dyestuff wastewater; integrated free-floating biofilm and activated sludge (IFFAS); nitrogen removal; simultaneous nitrification and denitrification (SND); upgrading

摘要:The activated sludge (AS) process is widely applied in dyestuff wastewater treatment plants (WWTPs); however, the nitrogen removal efficiency is relatively low and the effluent does not meet the indirect discharge standards before being discharged into the industrial park's WWTP. Hence it is necessary to upgrade the WWTP with more advanced technologies. Moving bed biofilm processes with suspended carriers in an aerobic tank are promising methods due to enhanced nitrification and denitrification. Herein, a pilot-scale integrated free-floating biofilm and activated sludge (IFFAS) process was employed to investigate the feasibility of enhancing nitrogen removal efficiency at different hydraulic retention times (HRTs). The results showed that the effluent chemical oxygen demand (COD), ammonium nitrate (NH4+-N) and total nitrogen (TN) concentrations of the IFFAS process were significantly lower than those of the AS process, and could meet the indirect discharge standards. PCR-DGGE and FISH results indicated that more nitrifiers and denitrifiers co-existed in the IFFAS system, promoting simultaneous nitrification and denitrification. Based on the pilot results, the IFFAS process was used to upgrade the full-scale AS process, and the effluent COD, NH4+-N and TN of the IFFAS process were 91-291 mg/L, 10.6-28.7 mg/L and 18.9-48.6 mg/L, stably meeting the indirect discharge standards and demonstrating the advantages of IFFAS in dyestuff wastewater treatment.