Apparatus for treatment of waste water

Details Apparatus for treatment of waste water Apparatus for treatment of waste water

C - Chemistry, Metallurgy

02

F

362/3

C02F 3/28 (2006.01)

Patent

CA 1183616

ABSTRACT An apparatus is provided for treatment of organic contaminant containing waste water such that the oxygen demand of the waste water is reduced and methane is produced. The apparatus comprises an anaerobic digester or filter. The digester is packed with a media which provides a substantial growth surface area to microorganisms contained within the digester. The digester also includes recirculation means whereby fluid in the digester below the media is recirculated directly to an upper portion of the digester. Further- more, the digester has effluent overflow outlets which outlets include a trap to prevent oxygen from entering the digester from the atmosphere. Fluid to be treated in the digester enters the upper portion thereof passes downwardly through the media, is recirculated by the recirculating means to an upper portion of the digester, and exits the digester after treatment by the micro- organisms therein through the outlet. Means are provided to withdraw methane produced in the digester therefrom, and to store it, forward it for utilization, or return it to the digester in the lower portion thereof to agitate biomasses of microorganisms within the digester. The apparatus is further provided with means for adding nutrients for the microorganisms to the digester influent and for adding buffering solution thereto in order to control pH within the digester.

389078

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