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Study on Treatment of Food Fermentation Wastewater by ASND and
Effluent Complying to GB 18918 —2002 1A Discharge Standard
ZHANG Xianxin,摇 WANG Ping * ,摇 MENG Wei
( School of Food and Chemical Engineering,Beijing Technology and Business University , Beijing 100048,China)
Abstract: Heterotrophic nitrification鄄aerobic denitrification strains were added to the SBR reactor and the
sludge domestication containing advantage strains was cultivated. The operation cycle was optimized,
which made strains having good biochemical, nitrification and denitrification performances. The simula鄄
tion food fermentation wastewater, containing about 80 mg / L COD Cr, 85 mg / L ammonia nitrogen, and
600 mg / L total nitrogen, was treated by the SBR reactor. After treatment, the concentrations of CODCr ,
ammonia nitrogen, and total nitrogen were 56, 0郾 65, and 14 mg / L, respectively. Moreover, the concen鄄
tration of CODCr was less than 20 mg / L after the polyaluminium chloride coagulation precipitation. The
concentrations of COD Cr, ammonia nitrogen, and total nitrogen reached the urban sewage treatment plant
pollutant discharge standard (GB 18918—2002), which is first A standard. The standard stated that the
concentrations of COD Cr, ammonia nitrogen, and total nitrogen in wastewater were less than 50, 5, and
15 mg / L, respectively.
Key words: aerobic simultaneous nitrification and denitrification; food fermentation industry; waste wa鄄
ter; first A class discharge standard
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