DENITRIFYING AND DEPHOSPHORIZING COMPOSITION AND METHOD FOR DENITRIFICATION AND DEPHOSPHORIZATION

摘要

PURPOSE:To obtain the composition capable of simultaneously denitrifying and dephosphorizing sewage by compression-molding a mixture of metallic iron grains, high-C/N carbon and a hydrogen donor source material. CONSTITUTION:A mixture of metallic iron grains, high C/N solid carbon and a hydrogen donor source material is compression-molded to obtain the composition. The composition and a packing 2 mixed with zeolite, etc., are packed in a column 1. An air diffuser pipe 3 for preventing the elution of iron ion is set at the lower part of the column 1, and air is diffused. Sewage 6 is supplied and treated. Consequently, the nitrate nitrogen and phosphate phosphorus in the water to be treated are simultaneously removed with high efficiency.