含高浓度有机物及重金属的废水处理方法研究  

STUDY ON TREATMENT OF WASTE WATER WITH HIGH CONCENTRATION OF ORGANIC COMPOUNDS AND HEAVY METALS

作　　者：田由芸[1] 袁璟 

机构地区：[1]青岛海洋大学工业水回用技术研究所 [2]青岛海洋大学水产学院,青岛266003

出　　处：《海洋与湖沼》1997年第5期536-542,共7页Oceanologia Et Limnologia Sinica

基　　金：国际合作项目

摘　　要：采用铁屑综合处理含高浓度有机物及重金属的废水。经处理后的废水，重金属和COD均达到国家排放标准。研究了铁屑用量、作用时间等的最佳值，并对作用机理做了解释。This paper gives a feasible treatment for waste water with highconcentration of organic matter and heavy metals.It is possible to remove heavy metals and organic compounds at the same timewhen they are in high concentration and treated with cast iron chippings. The wastewater was made to react with the iron chippings and then its pH adjusted to 9.5 ±0.4, the precipitation would occur by coagulation. Let the supermatant flow through aniron chippings bed and then adsorbed by cinder. After this treatment,all the indexesof heavy metas and COD could reach the national discharge standard (i. e. COD <10mg / L, total chromitun < 0.05mg / L, copper < 0.5mg / L, lead < 0.5mg / L andtin< 0.5mg / L).The waste water was treated twice with iron chippings. At flrsttime the reactiontimeof waste water with iron chippings was controlled within 60- 90min, theconsumption amount of iron chippings was controlled within 0.6-0.8g / L and pHwas adjusted to 9.5±0.4 with lime. Then all the Cr2+, Cu2+, Pb2+ and Sn2+ wereprecipitated in hydroxides, so that the concentrahon of heavy metals was lower thanthe nahonal discharge standard. Besides, the organic compounds in waste water werealso absorbed on the particles of hydroxides of Fe2+ and heavy metals and removed.The removing extent of COD could come to 81.08%- 84.80%. The waste waterwhich had passed the first processing was again passed through an iron chippings bed,and allowed to stay there for 30-60min, After that the content of organic compoundswas reduced further, the removing extent of COD could reach 78.5%-85.31%.The characterishcs of this treatment are simple technology, reasonalble combinahon,convenient operation, low material cost less investment for engineering, and gooddisposal effect. Iron chippings and cinder are all waste of industry, so' ascording tothis method to control waste by waste is achieved.The ophmum amount of iron chippings to be used and the reaction time werestudied. The mechanism was also explained.

关 键 词：废水处理 高浓度有机废水 重金属废水 铸铁铁屑 

分 类 号：X703[环境科学与工程—环境工程]