专利名称：PROCESS AND PLANT FOR BIOLOGICAL
PURIFICATION OF COKING PLANTWASTEWATER
发明人：THIELERT, HOLGER申请号：EP12715002.7申请日：20120402公开号：EP2697173A2公开日：20140219
摘要：The invention relates to a process for the biological purification of coking plantwastewater that is loaded with nitrogen compounds, cyanides, phenols and sulphides.The coking plant wastewater, for removal of pollutants that inhibit a nitrification, is fedtogether with a biomass-containing stream of matter to a detoxification reactor that hasa gas-treatment zone and a reaction zone. The feed mixture supplied to the
detoxification reactor is exposed in the gas-treatment zone to a gaseous oxidizing agent.A stream of matter enriched with the oxidizing agent is fed to the reaction zone in whichcyanides and other pollutants inhibiting the nitrification are biodegraded. A stream ofmatter is withdrawn from the reaction zone and returned to the detoxification reactor. Inaddition, a wastewater stream from the detoxification reactor is separated by a
membrane filtration into a biomass-containing retentate stream and a purified permeatestream. From the retentate stream, a substream which entrains excess sludge isdischarged. The retentate stream, after separating off the substream, is recirculated tothe detoxification reactor. The permeate stream is further purified by nitrification andsubsequent denitrification.
申请人：THYSSENKRUPP UHDE GMBH
地址：Friedrich-Uhde-Strasse 15 44141 Dortmund DE
国籍：DE
代理机构：Albrecht, Rainer Harald
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