STUDY ON THE REMOVAL OF AMMONIA NITROGEN AND TOTAL PHOSPHORUS IN PIT WATER BY COMBINATION OF ELECTRIC FLOCCULATION AND SUBMERGED ULTRAFILTRATION PROCESS
This paper is based on the combination of electric flocculation and immersion ultrafiltration in processing of rainwater and cellar water which investigates the main factors which have affected ammonia nitrogen and TP removal efficiency,and also comparing with single ultrafiltration.The results indicate that the removal of ammonia nitrogen mainly lies in the combination of electric flocculation and ultrafiltration and have a function of Cl-indirect electro-oxidation,for TP removal is mainly produced by the electrolysis of Al3+ and PO42-reaction of refractory AlPO4.When the plate spacing is 10 mm,and the current density is 18.51 A/m2,the electric flocculation time is 15 min,the removal rate of ammonia nitrogen and TP were 47％ and 90.1％ respectively,when comparing to only use ultrafiltration,the removal rate increased by 36.9 and 80.7 percentage point,respectively,which indicates that the electric flocculation has obvious reinforcement on ultrafiltration.The combination process is convenient,efficient,and suitable for rural decentralized cellar water processing.
rainwater and cellar waterelectric flocculationUF-Sammonia nitrogentotal phosphrous
NETL
NSTL
万方数据
维普
