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微生物强化可以提高序批式生物反应器(SBR)的处理效果。对高NH_4~+-N(氨氮)、低COD/N猪场沼液脱氮条件进行优化,结果表明,投加硝化细菌对促进SBR活性污泥系统硝化作用不明显,总氮(TN)去除率为1.7%,以甲醇为碳源的投菌组,当COD/N为11:1时总氮去除率约为84%。此外,使用低聚果糖废液作为混合碳源,同等COD/N条件下,脱氮效果优于甲醇,约为95%。优化投菌比例,综合碳源实验,脱氮效果最佳条件为硝化细菌10~5 CFU/mL、反硝化细菌10~5 CFU/mL,水力停留时间为3 d,NH_4~+-N、TN去除率分别为(99±0.4)%,(95±1.5)%,出水的相应浓度分别为(2.63±0.88)、(13.80±4.34)mg/L。此外,COD从最初的530 mg/L降低至100 mg/L以下。改进的工艺出水氨氮和总氮优于一级A标准,为养殖废水的深度脱氮提供了基础数据。
Microbial enhancement can improve the sequencing batch bioreactor (SBR) treatment effect. The results showed that adding nitrifying bacteria had no obvious effect on promoting nitrification of SBR activated sludge system, total nitrogen (TN) removal The rate of total nitrogen removal was about 84% when the COD / N was 11: 1 with the rate of 1.7%. In addition, the use of oligofructose waste as a mixed carbon source, the same COD / N conditions, denitrification better than methanol, about 95%. The optimum conditions for the denitrification were as follows: nitrifying bacteria 10 ~ 5 CFU / mL, denitrifying bacteria 10 ~ 5 CFU / mL, hydraulic retention time 3 d, NH_4 ~ + -N, TN The removal efficiencies were (99 ± 0.4)% and (95 ± 1.5)%, respectively. The effluent concentrations were (2.63 ± 0.88) and (13.80 ± 4.34) mg / L, respectively. In addition, COD decreased from the initial 530 mg / L to below 100 mg / L. The improved process effluent ammonia nitrogen and total nitrogen are better than the first grade A standard, which provides the basic data for the deep denitrification of aquaculture wastewater.