SULPHUR CYCLE-ASSOCIATED DENITRIFYING ENHANCED BIOLOGICAL PHOSPHORUS REMOVAL (SD-EBPR) UTILIZING SULPHUR COMPOUNDS AS ELECTRON CARRIERS FOR BIOLOGICAL NUTRIENT REMOVAL OF WASTEWATER TREATMENT

摘要

Sewage treatment is performed by using sulphur to facilitate electron flow. A first cycle uses a sulphur composition having sulphur and/or sulphur compounds to transfer electrons from organic carbon to oxygen, nitrate and nitrite, and to convert phosphorus-containing compounds to solid material, which is retained in sewage sludge. The sulphur is further used to perform denitrification of nitrogen compounds. A further cycle uses oxygen to oxidize any ammonia present to nitrate and/or nitrite.