Patent ID: 7485229
Filing Date: 2009-02-03
Classification: C02F,Y02W,Y10S

Abstract:
1. A process for removing nitrates, organic contaminants and ammonia, and recycling sulfates in wastewater, which comprises: (A) a step of feeding wastewater having high concentration of nitrates to be treated into a reaction chamber and well mixing the wastewater at a bottom rectifying cavity; (B) a step of feeding the wastewater well mixed in step (A) through cultivated solid sulfur particles and granular active carbon packed in said reaction chamber, said active carbon having anaerobic gaps and sulfur-reducing bacteria in said gaps, to treat the wastewater by denitrification with autotrophic microorganism, wherein the said solid sulfur particles and granular active carbon are mixed; (C) a step of redirecting hydrogen sulfide exhausted during the treatment in step (B) through a discharge pipe to reaction chamber; and (D) a step of discharging the treated wastewater via outlet.