Controlling factors of treatment of high-strength ammonia wastewater by immobilized microorganism
Journal Title: Science Paper Online - Year 2007, Vol 2, Issue 7
Abstract
The effects of DO, pH, HRT and influent ammonia concentration on nitrification were investigated in order to determine the optimal conditions for ammonia removal of synthetic wastewater with high strength ammonia in an immobilized microorganism biological aerated filter (G-BAF) system. DO was kept at 0.5, 2.0, 4.0 and 6.0mg/L, pH at 6.5, 7.5, 8.5 and 9.5, HRT at 48, 36, 24, 18, and 12h, the ammonia concentration of influent at 200, 500, 1000, and 1500mg/L, respectively. The results showed that nitrification was steadily obtained and the optimal conditions were DO=4.0mg/L, pH=7.5, and HRT=24h, in the case of ammonia concentration of effluent below 5.0mg/L and ammonia removal rate above 99.5%.
Authors and Affiliations
Jinren Ni, Lili Wen, Zhengfang Ye
Keywords
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