Treatment of waste cutting fluid by coagulation-anaerobic hydrolysis (with or without cosubstrate glucose)-aeration process
A coagulation-anaerobic hydrolysis-aeration process was used to treat the waste cutting fluid, which was discharged from a metalworking plant, and the operating conditions of each unit were optimized in this paper. The results showed that 9 g/L polyaluminum chloride and 0.3 g/L cationic polyacrylami...
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| Format: | Article |
| Language: | English |
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IWA Publishing
2022-01-01
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| Series: | Water Practice and Technology |
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| Online Access: | http://wpt.iwaponline.com/content/17/1/419 |
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| author | Zhi Rui Wang Jing Jie Yu Ji Xuan Yin Shao Po Wang Hua Ji Ma |
| author_facet | Zhi Rui Wang Jing Jie Yu Ji Xuan Yin Shao Po Wang Hua Ji Ma |
| author_sort | Zhi Rui Wang |
| collection | DOAJ |
| description | A coagulation-anaerobic hydrolysis-aeration process was used to treat the waste cutting fluid, which was discharged from a metalworking plant, and the operating conditions of each unit were optimized in this paper. The results showed that 9 g/L polyaluminum chloride and 0.3 g/L cationic polyacrylamide were added in the coagulation stage, the TOC was removed by 78.94% and the BOD5/COD of the waste cutting fluid increased from 0.046 to 0.312 before and after coagulation. The coagulation effluent was further treated by anaerobic hydrolysis-aeration, and the TOC removal efficiencies of the biological process and the whole chemical-biological process were 92.77% and 98.48% respectively. Adding glucose as a cosubstrate into the anaerobic hydrolysis can improve the TOC removal efficiency; when the TOC content ratio of coagulation effluent to glucose solution was 7:3, the TOC removal efficiencies of the biological process and the chemical-biological process reached 97.16% and 99.40%, and the total oil removal efficiency of the whole process reached 99.99%. The effluent quality parameters of the coagulation-anaerobic hydrolysis (with cosubstrate glucose)-aeration process met the Class C limits specified in the Wastewater Quality Standards for Discharge to Municipal Sewers (GB/T 31962-2015); that is, the effluent COD, TN, TP and total oil were below 300 mg/L, 25 mg/L, 5 mg/L and 110 mg/L, respectively, and the effluent pH was between 6.5–9.5. HIGHLIGHTS
The waste cutting fluid could be well treated by the coagulation-anaerobic hydrolysis-aeration process.;
The influence of coagulant and coagulant aid on the biodegradability of waste cutting fluid was analyzed.;
The removal efficiency of the treatment system was further improved by adding some glucose into the anaerobic hydrolysis unit.;
The traditional method had low cost and high treatment efficiency.; |
| first_indexed | 2024-12-11T10:45:14Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 1751-231X |
| language | English |
| last_indexed | 2024-12-11T10:45:14Z |
| publishDate | 2022-01-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Practice and Technology |
| spelling | doaj.art-bf1ff9d0ba444a09a6b4f60399801e052022-12-22T01:10:29ZengIWA PublishingWater Practice and Technology1751-231X2022-01-0117141943010.2166/wpt.2021.092092Treatment of waste cutting fluid by coagulation-anaerobic hydrolysis (with or without cosubstrate glucose)-aeration processZhi Rui Wang0Jing Jie Yu1Ji Xuan Yin2Shao Po Wang3Hua Ji Ma4 School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China China Northeast Municipal Engineering Design & Research Institute Co., Ltd., Shenzhen 518052, China School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China A coagulation-anaerobic hydrolysis-aeration process was used to treat the waste cutting fluid, which was discharged from a metalworking plant, and the operating conditions of each unit were optimized in this paper. The results showed that 9 g/L polyaluminum chloride and 0.3 g/L cationic polyacrylamide were added in the coagulation stage, the TOC was removed by 78.94% and the BOD5/COD of the waste cutting fluid increased from 0.046 to 0.312 before and after coagulation. The coagulation effluent was further treated by anaerobic hydrolysis-aeration, and the TOC removal efficiencies of the biological process and the whole chemical-biological process were 92.77% and 98.48% respectively. Adding glucose as a cosubstrate into the anaerobic hydrolysis can improve the TOC removal efficiency; when the TOC content ratio of coagulation effluent to glucose solution was 7:3, the TOC removal efficiencies of the biological process and the chemical-biological process reached 97.16% and 99.40%, and the total oil removal efficiency of the whole process reached 99.99%. The effluent quality parameters of the coagulation-anaerobic hydrolysis (with cosubstrate glucose)-aeration process met the Class C limits specified in the Wastewater Quality Standards for Discharge to Municipal Sewers (GB/T 31962-2015); that is, the effluent COD, TN, TP and total oil were below 300 mg/L, 25 mg/L, 5 mg/L and 110 mg/L, respectively, and the effluent pH was between 6.5–9.5. HIGHLIGHTS The waste cutting fluid could be well treated by the coagulation-anaerobic hydrolysis-aeration process.; The influence of coagulant and coagulant aid on the biodegradability of waste cutting fluid was analyzed.; The removal efficiency of the treatment system was further improved by adding some glucose into the anaerobic hydrolysis unit.; The traditional method had low cost and high treatment efficiency.;http://wpt.iwaponline.com/content/17/1/419aerationanaerobic hydrolysiscoagulationcosubstratewaste cutting fluid |
| spellingShingle | Zhi Rui Wang Jing Jie Yu Ji Xuan Yin Shao Po Wang Hua Ji Ma Treatment of waste cutting fluid by coagulation-anaerobic hydrolysis (with or without cosubstrate glucose)-aeration process Water Practice and Technology aeration anaerobic hydrolysis coagulation cosubstrate waste cutting fluid |
| title | Treatment of waste cutting fluid by coagulation-anaerobic hydrolysis (with or without cosubstrate glucose)-aeration process |
| title_full | Treatment of waste cutting fluid by coagulation-anaerobic hydrolysis (with or without cosubstrate glucose)-aeration process |
| title_fullStr | Treatment of waste cutting fluid by coagulation-anaerobic hydrolysis (with or without cosubstrate glucose)-aeration process |
| title_full_unstemmed | Treatment of waste cutting fluid by coagulation-anaerobic hydrolysis (with or without cosubstrate glucose)-aeration process |
| title_short | Treatment of waste cutting fluid by coagulation-anaerobic hydrolysis (with or without cosubstrate glucose)-aeration process |
| title_sort | treatment of waste cutting fluid by coagulation anaerobic hydrolysis with or without cosubstrate glucose aeration process |
| topic | aeration anaerobic hydrolysis coagulation cosubstrate waste cutting fluid |
| url | http://wpt.iwaponline.com/content/17/1/419 |
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