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日本公司开发回收废水处理中氟的水处理化学品技术
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《有机硅氟资讯》 2002年第12期12-12,共1页
关键词 开发 回收废水处理 处理化学品 日本 三菱气体化学品公司
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探究膜分离技术在生物化工中的应用
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作者 吴晓文 《中国科技期刊数据库 工业A》 2023年第7期42-45,共4页
膜分离技术是一种基于半透膜的选择分离过程技术,被广泛应用于化工、环境保护、能源产业和生物制药等领域。该技术通过利用膜的选择性分离作用,能够高效地分离不同大小、形状和性质的混合组分。,具有高选择性、操作简便和能耗低等优势... 膜分离技术是一种基于半透膜的选择分离过程技术,被广泛应用于化工、环境保护、能源产业和生物制药等领域。该技术通过利用膜的选择性分离作用,能够高效地分离不同大小、形状和性质的混合组分。,具有高选择性、操作简便和能耗低等优势。本文对膜分离技术进行了综合探讨,包括其基本原理、不同类型和应用领域。特别关注生物化工领域中的应用,如生物分离与纯化、废水处理与回收以及生物反应器与生物转化等方面。本文也分析了膜分离技术所面临的挑战,如膜污染、膜稳定性和成本等,并探讨了未来发展方向。通过深入了解膜分离技术的原理和应用,可以为其在各个领域中的进一步发展和优化提供参考和指导。 展开更多
关键词 膜分离技术 生物化工 废水处理回收
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Electricity Generation Using Membrane-less Microbial Fuel Cell during Wastewater Treatment 被引量:11
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作者 杜竹玮 李清海 +2 位作者 佟萌 李少华 李浩然 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第5期772-777,共6页
An upflow mode membrane-less microbial fuel cell (ML-MFC) was designed for wastewater treatment. Granular graphite electrodes, which are flexible in size, were adopted in the ML-MFC. Microbes present in anaerobic ac... An upflow mode membrane-less microbial fuel cell (ML-MFC) was designed for wastewater treatment. Granular graphite electrodes, which are flexible in size, were adopted in the ML-MFC. Microbes present in anaerobic activated sludge were used as the biocatalyst and artificial wastewater was tested as substrate. During the electrochemically active microbe enrichment stage, a stable power output of 536 mW.m-3 with reference to the anode volume was generated by the ML-MFC running in batch mode. The voltage output decreased from 203 mV to about 190 mV after the ML-MFC was changed from batch mode to normally continuous mode, indicating that planktonic electrochemically active bacterial strains in the ML-MFC may be carried away along with the effluent. Cyclic voltammograms showed that the attached microbes possessed higher bioelectrochemical activity than the planktonic microbes. Forced aeration to the cathode benefited the electricity generation obviously. Higher feeding rate and longer electrode distance both increased the electricity generation. The coulombic yield was not more than 20% throughout the study, which is lower than that of MFCs with membrane. It is proposed that dissolved oxygen diffused from the cathode to the anode may consume part of the substrate. 展开更多
关键词 microbial fuel cell membrane-less wastewater treatment
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Recovery of copper sulfate after treating As-containing wastewater by precipitation method 被引量:4
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作者 郑雅杰 王勇 +1 位作者 肖发新 罗圆 《Journal of Central South University》 SCIE EI CAS 2009年第2期242-246,共5页
The solid sodium hydroxide neutralized acidic As-containing wastewater till pH value was 6. Green copper arsenite was prepared after copper sulfate was added into the neutralized wastewater when the molar ratio of Cu ... The solid sodium hydroxide neutralized acidic As-containing wastewater till pH value was 6. Green copper arsenite was prepared after copper sulfate was added into the neutralized wastewater when the molar ratio of Cu to As was 2:1 and pH value of the neutralized wastewater was adjusted to 8.0 by sodium hydroxide. The arsenious acid solution and red residue were produced after copper arsenite mixed with water according to the ratio of liquid to solid of 4:1 and copper arsenite was reduced by SO2 at 60℃ for 1 h. The white powder was gained after the arsenious acid solution was evaporated and cooled. Copper sulfate solution was obtained after the red residue was leached by H2SO4 solution under the action of air. The results show that red residue is Cu3(SO3)2·2H2O and the white powder is As2O3. The leaching rate of Cu reaches 99.00% when the leaching time is 1.5 h, molar ratio of H2SO4 to Cu is 1.70, H2SO4 concentration is 24% and the leaching temperature is 80 ℃. The direct recovery rate of copper sulfate is 79.11% and the content of CuSOa·5H2O is up to 98.33% in the product after evaporating and cooling the copper sulfate solution. 展开更多
关键词 As-containing wastewater SO2 AS2O3 copper sulfate copper arsenite RECOVERY
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Analysis of Circumstance Influence Factors on HMBR for Waste-water Reclamation in Dwelling District
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作者 常颖 汪永辉 +2 位作者 薛罡 郭美芳 王宝贞 《Journal of Donghua University(English Edition)》 EI CAS 2003年第3期78-83,共6页
Circumstance influence factors on Hybrid Membrane Bio-Reactor (HMBR) process for the wastewater reclamation in dwelling district was analyzed. The main characteristic of this process is that sludge and nitrified efflu... Circumstance influence factors on Hybrid Membrane Bio-Reactor (HMBR) process for the wastewater reclamation in dwelling district was analyzed. The main characteristic of this process is that sludge and nitrified effluent can be recycled automatically, which simplifies the operation of system and is beneficial to get the high removal of organics and nitrogen. Based on the analysis of circumstance influence factors, it is recommended that water temperature of about 20℃, influent pH of 6 -7 and DO of 1. 0 mg/L - 1. 5 mg/L in the aerobic compartment. Under these conditions, COD, BOD5, NH4+ -N, and TN were removed effectively in HMBR and the average removal efficiencies were 94.5%, 99.3%, 99.4% and 84.7%, respectively. SS and coliforms were both below the detection limits in the permeate of UF membrane module, and turbidity was less than 1NTU. The treated effluent meets the Miscellaneous Domestic Water Quality Standard (CJ25.1-89), and can be reused multipurposely such as watering of green belts, cleaning and toilet flushing water after disinfection. 展开更多
关键词 wastewater reclamation in dwelling district Hybrid Membrane Bio-Reactor TEMPERATURE DO PH
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Resourceful Utilization of Tannery Wastewater
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作者 Wang Chen Wang Xikui Ding Maochen Zhang Chaoyu 《Chinese Journal of Population,Resources and Environment》 2012年第1期116-121,共6页
Leather industry is an important light industry in China.Leather making requires a series of chemical treatment.Degreasing,unhairing and chrome tanning wastewaters are the main portions of tannery wastewater.Reclaimin... Leather industry is an important light industry in China.Leather making requires a series of chemical treatment.Degreasing,unhairing and chrome tanning wastewaters are the main portions of tannery wastewater.Reclaiming and reusing these wastewaters can eliminate 80% of COD,75% of BOD,95% of chromium and 93% of sulfuret,furthermore reduce environment impact,decrease treatment costs,save chemicals and water.Some application methods of wastewater reclamation and reuse for different operations were reported.The suitable reclamation and reuse technologies can enable leather making processes more rational,and realize the recovery and recycle of several chemicals in the tannery.Resourceful utilization of tannery wastewater should mate with renovating production technology,updating equipment,and must be guaranteed sufficiently by environmental protection measures. 展开更多
关键词 leather industry WASTEWATER waste liquor treatment resourceful utilization
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RECOVERY AND DESTRUCTIVE TREATMENTOF HARMFUL SUBSTANCE IN COKING PLANT WASTEWATER
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作者 程建光 《Journal of Coal Science & Engineering(China)》 2000年第1期68-71,共4页
This paper discussed the comprehensive treatment of coking plant effluent.Cyanide containing and phenol wastewater was first recovered and utilized respectively, and then, mixed it with other low harmful wastewater fo... This paper discussed the comprehensive treatment of coking plant effluent.Cyanide containing and phenol wastewater was first recovered and utilized respectively, and then, mixed it with other low harmful wastewater for destroying treatment.Treated water was reused in quenching coke. 展开更多
关键词 coking effluent recoverable utilization destructive treatment
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