Characteristics of multi-industry sludge biochar and behavior of advanced treatment of industrial wastewater
Biochar was prepared by anaerobic pyrolysis of the residual sludge collected from the biochemical treatment system of pharmaceutical, dyeing,and paper-making wastewater. The emission of toxic gas was explored, and the physicochemical properties of various sludge biochar were characterized. Furthermo...
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Editorial Office of Industrial Water Treatment
2024-08-01
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| Series: | Gongye shui chuli |
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| Online Access: | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-0806 |
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| author | CHEN Wenchao LI Yongchao YANG Xinmin LIU Jiahao SHAN Shengdao |
| author_facet | CHEN Wenchao LI Yongchao YANG Xinmin LIU Jiahao SHAN Shengdao |
| author_sort | CHEN Wenchao |
| collection | DOAJ |
| description | Biochar was prepared by anaerobic pyrolysis of the residual sludge collected from the biochemical treatment system of pharmaceutical, dyeing,and paper-making wastewater. The emission of toxic gas was explored, and the physicochemical properties of various sludge biochar were characterized. Furthermore, biochar was used to treat industrial wastewater, and its toxic effect on aquatic organisms was investigated. The experiment results showed that the yield of sludge biochar was 53%-71%. CO2 emission decreased with the increase of pyrolysis temperature,whereas CO, CH4, H2, and other gases emission increased. The content of C in sludge biochar was relatively low, and it contained iron, manganese, chromium, lead, etc. The content of iron was the highest, which was 5 540 mg in 1 kg dyeing sludge biochar. Compared with low and medium-temperature sludge biochar, high-temperature sludge biochar had the best treatment effect on effluent from the secondary sedimentation tank. After 24 h reaction, 0.5 g/L pharmaceutical sludge biochar could remove 88.5% of sulfide, but could not decolorize. Dyeing sludge biochar could remove COD and meet the draining standard, but its removal ability towards anilines was poor. Paper sludge biochar could remove COD, TN, and chroma in wastewater. In addition, the sludge biochar could release a small amount of metal from itself during wastewater treatment. Low doses of sludge biochar had no significant effect on the growth of aquatic organisms. However,as the sludge biochar increased to 2.0 g/L, the number of Escherichia coli colonies decreased by 5.3%-11.2%, and the growth inhibition rate of Chlorella sp. was 9.1%-12.3%. |
| format | Article |
| id | doaj-art-90840bc0f4524e8eb38c0245ed475139 |
| institution | OA Journals |
| issn | 1005-829X |
| language | zho |
| publishDate | 2024-08-01 |
| publisher | Editorial Office of Industrial Water Treatment |
| record_format | Article |
| series | Gongye shui chuli |
| spelling | doaj-art-90840bc0f4524e8eb38c0245ed4751392025-08-20T01:47:51ZzhoEditorial Office of Industrial Water TreatmentGongye shui chuli1005-829X2024-08-01448708010.19965/j.cnki.iwt.2023-08061005-829X（2024）08-0070-11Characteristics of multi-industry sludge biochar and behavior of advanced treatment of industrial wastewaterCHEN Wenchao0LI Yongchao1YANG Xinmin2LIU Jiahao3SHAN Shengdao4Zhejiang University of Science and Technology, Hangzhou 310023, ChinaZhejiang University of Science and Technology, Hangzhou 310023, ChinaZhejiang University of Science and Technology, Hangzhou 310023, ChinaZhejiang University of Science and Technology, Hangzhou 310023, ChinaZhejiang University of Science and Technology, Hangzhou 310023, ChinaBiochar was prepared by anaerobic pyrolysis of the residual sludge collected from the biochemical treatment system of pharmaceutical, dyeing,and paper-making wastewater. The emission of toxic gas was explored, and the physicochemical properties of various sludge biochar were characterized. Furthermore, biochar was used to treat industrial wastewater, and its toxic effect on aquatic organisms was investigated. The experiment results showed that the yield of sludge biochar was 53%-71%. CO2 emission decreased with the increase of pyrolysis temperature,whereas CO, CH4, H2, and other gases emission increased. The content of C in sludge biochar was relatively low, and it contained iron, manganese, chromium, lead, etc. The content of iron was the highest, which was 5 540 mg in 1 kg dyeing sludge biochar. Compared with low and medium-temperature sludge biochar, high-temperature sludge biochar had the best treatment effect on effluent from the secondary sedimentation tank. After 24 h reaction, 0.5 g/L pharmaceutical sludge biochar could remove 88.5% of sulfide, but could not decolorize. Dyeing sludge biochar could remove COD and meet the draining standard, but its removal ability towards anilines was poor. Paper sludge biochar could remove COD, TN, and chroma in wastewater. In addition, the sludge biochar could release a small amount of metal from itself during wastewater treatment. Low doses of sludge biochar had no significant effect on the growth of aquatic organisms. However,as the sludge biochar increased to 2.0 g/L, the number of Escherichia coli colonies decreased by 5.3%-11.2%, and the growth inhibition rate of Chlorella sp. was 9.1%-12.3%.https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-0806sludge biocharindustrial waste waterdeep treatmenttoxic effect |
| spellingShingle | CHEN Wenchao LI Yongchao YANG Xinmin LIU Jiahao SHAN Shengdao Characteristics of multi-industry sludge biochar and behavior of advanced treatment of industrial wastewater Gongye shui chuli sludge biochar industrial waste water deep treatment toxic effect |
| title | Characteristics of multi-industry sludge biochar and behavior of advanced treatment of industrial wastewater |
| title_full | Characteristics of multi-industry sludge biochar and behavior of advanced treatment of industrial wastewater |
| title_fullStr | Characteristics of multi-industry sludge biochar and behavior of advanced treatment of industrial wastewater |
| title_full_unstemmed | Characteristics of multi-industry sludge biochar and behavior of advanced treatment of industrial wastewater |
| title_short | Characteristics of multi-industry sludge biochar and behavior of advanced treatment of industrial wastewater |
| title_sort | characteristics of multi industry sludge biochar and behavior of advanced treatment of industrial wastewater |
| topic | sludge biochar industrial waste water deep treatment toxic effect |
| url | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-0806 |
| work_keys_str_mv | AT chenwenchao characteristicsofmultiindustrysludgebiocharandbehaviorofadvancedtreatmentofindustrialwastewater AT liyongchao characteristicsofmultiindustrysludgebiocharandbehaviorofadvancedtreatmentofindustrialwastewater AT yangxinmin characteristicsofmultiindustrysludgebiocharandbehaviorofadvancedtreatmentofindustrialwastewater AT liujiahao characteristicsofmultiindustrysludgebiocharandbehaviorofadvancedtreatmentofindustrialwastewater AT shanshengdao characteristicsofmultiindustrysludgebiocharandbehaviorofadvancedtreatmentofindustrialwastewater |