发明名称 Method for Purification of Waste Water
摘要 <p>PCT No. PCT/SE91/00582 Sec. 371 Date Mar. 8, 1993 Sec. 102(e) Date Mar. 8, 1993 PCT Filed Sep. 4, 1991 PCT Pub. No. WO92/04284 PCT Pub. Date Mar. 19, 1992.A method of reducing nitrogen, phosphor, and excessive biological oxygen demand (BOD) in wastewater supplied to and passing through a granular filter bed activated with bacteria includes in the flow direction of the wastewater through the bed simultaneously precipitation of phosphorous, denitrification and reduction of the excessive BOD in a single process step. The reduction of excess BOD is produced by blowing in an oxygen-containing gas, preferably air. Immediately before the wastewater enters the filter bed a precipitation/flocculation agent may be added for precipitation of phosphor.</p>
申请公布号 CA2090604(A1) 申请公布日期 1992.03.08
申请号 CA19912090604 申请日期 1991.09.04
申请人 NORDIC WATER PRODUCTS AB 发明人 JONSSON, KURT A.
分类号 C02F3/34;C02F3/00;C02F3/04;C02F3/12;C02F3/28;(IPC1-7):C02F3/06;C02F1/74;C02F1/52 主分类号 C02F3/34
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