摘要
H酸废水具有色度和COD浓度高、酸性强、生物毒性大等特点,是典型的难降解有机废水,传统的处理方法均存在处理成本高、易产生二次污染等问题。为此,提出了一种H酸废水资源化处理工艺,包括溶析结晶生成结晶硫酸钠、溶剂回收工段实现废酸循环利用、通过高温沸腾氧化系统生成成品硫酸钠并实现尾气的达标处理。实际应用表明,H酸废水经溶析结晶、高温氧化及循环利用后将产生硫酸钠等资源化产品,且处理成本接近于零,具有极大的经济和环境效益。
With the characteristics of high color and COD concentration,strong acidity,and high biological toxicity,H-acid wastewater is a typical refractory organic wastewater,and the traditional treatment methods have the difficulties of high cost and secondary pollution. A resource recovery treatment process for H-acid wastewater was proposed,which mainly included anti-solvent crystallization,recycling of the waste acid in the solvent recovery phase,and production of the finished sodium sulfate through a high temperature boiling oxidation system. The exhaust gas complied with the standard.Applications showed that after anti-solvent crystallization,high temperature oxidation,and recycling of Hacid wastewater,resource products such as sodium sulfate were produced,and the treatment cost was close to zero,which demonstrated great economic and environmental benefits.
作者
徐瑾
徐枫
李梅彤
XU Jin;XU Feng;LI Mei-tong(School of Environmental Science and Engineering,Tianjin University,Tianjin 300072 ,China;School of Environmental Science and Safety Engineering,Tianjin University of Technology,Tianjin300384,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2019年第15期92-94,共3页
China Water & Wastewater
基金
教育部人文社会科学研究规划基金资助项目(18YJA630121)
天津市教委重大项目(2018JWZD33)
天津市重点研发计划成果转化接力支持项目(18YFJLCG00140)
水利工程仿真与安全国家重点实验室开放基金资助项目(HESS-1701)
天津市科技重大专项与工程项目(18ZXSZSF00090)
关键词
H酸废水
资源化处理工艺
溶析结晶
循环利用
高温氧化
H-acid wastewater
resource recovery treatment process
anti-solvent crystallization
recycling
high temperature oxidation
