人民长江2016，Vol.47Issue(8)：68-72,5.DOI:10.16232/j.cnki.1001-4179.2016.08.014
水电工程砂石系统生产废水处理工艺优化研究
Study on optimization of treatment process of waste water originated from sand and gravel system of hydropower projects
摘要
Abstract
Aiming at the poor effect of waste water treatment process in sand and gravel system, field wastewater of 2 process-ing systems for sand and stone in Baihetan Hydropower Project and Wudongde Hydropower Project was sampled. And then the numerical simulation, field and laboratory experiments were conducted to optimize the main wastewater treatment process. Experi-ment results show that total recovery rate by two-step stone-powder recycling can reach to about 60%, an improvement to sin-gle-step recycling by 50%;sedimentation performance can be significantly improved by adding suitable flocculant, if the parti-cle size of suspended solids was small, the co-conditioning technology with PAM and CaO should be applied, and the hydrostat-ic settling velocity is improved by 11 times. The agent used in wastewater sedimentation and slurry dewatering have much consis-tency in type and dosage of front-end sedimentation process, so the technology of only adding flocculant in front-end sedimen-tation process is feasible. The technique of diaphragm pressing and high pressure air flow were introduced into filter press, then dewatering time has been decreased by 67%, and moisture content of the powder cake has been reduced to 15%.关键词
砂石系统/废水处理/工艺优化/水电工程Key words
aggregate system/wastewater treatment/process optimization/hydropower project分类
建筑与水利引用本文复制引用
郭辉,陈雯,黄国兵,邢领航..水电工程砂石系统生产废水处理工艺优化研究[J].人民长江,2016,47(8):68-72,5.基金项目
国家自然科学基金项目(51309023) （51309023）
长江勘测规划设计研究院科研项目(CX2013233) （CX2013233）
