METHOD AND APPARATUS FOR PRETREATING BARN SEWAGE

摘要

PROBLEM TO BE SOLVED: To provide a pretreatment method and a pretreatment apparatus for cleaning barn sewage. SOLUTION: (1) Soluble phosphorus in barn sewage is insolubilized by aerating barn sewage to be removed. (2) A means for removing a malodor generated by aeration is added. (3) A means for removing a malodor is an activated sludge deororizing method. (4) A tank being a barn sewage pretreatment apparatus is equipped with a supply port of barn sewage, a discharge means of phosphorus- free water, an air jet means provided from the bottom part of the tank to the vicinity of the intermediate part thereof in order to insolubilize soluble phosphorus in barn sewage and a taking-out port of phosphorus-containing particle formed by insolubilization and soluble phosphorus in barn sewage is insolubilized by aerating barn sewage to be removed. (5) A deodorizing apparatus for deodorizing air containing a malodor passed through barn sewage by aeration is added. (6) The deodorizing apparatus is an activated sludge deodorizing apparatus.