发明名称 |
REMOVAL OF DIOXINS, PCB'S AND OTHER HALOGENATED ORGANIC COMPOUNDS FROM WASTEWATER |
摘要 |
Combinations of physicochemical and biological treatment processes are capable of removing dioxins, polychlorobiphenyls (PCB's) and other halogenated organic compounds from wastewaters; the dioxins and PCB's are removed by at least 90 percent in the pretreatment steps of neutralization, oxidation, and sedimentation; the residual amounts are removed in a powdered activated carbon enhanced sequencing batch reactor (PAC-SBR) operating at high mixed liquid suspended solids concentration ( > 5000)mg/L); power activated carbon (PAC) is supplemented to the bioreactor to ensure complete removal of the dioxins (<0.8 ppt) and PCB's (<2 ppb); the PAC-SBR enhanced biological treatment process is capable of meeting stringent effluent limits not only on dioxins and PCB's hut also on other toxic halogenated organic compounds; the treatment cost of this process is substantially less than either the conventional granular activated carbon adsorption technology or two stage treatment of biodegradation and carbon absorption. |
申请公布号 |
CA1277045(C) |
申请公布日期 |
1990.11.27 |
申请号 |
CA19850498118 |
申请日期 |
1985.12.19 |
申请人 |
OCCIDENTAL CHEMICAL CORPORATION |
发明人 |
YING, WEI-CHI;SOJKA, STANLEY A. |
分类号 |
C02F1/28;C02F1/72;C02F3/12 |
主分类号 |
C02F1/28 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|