藻菌共生光序批式生物膜反应器短程脱氮效能研究

Study on Shortcut Nitrogen Removal Efficiency of Algal-Bacterial Symbiotic Photo-Sequencing Batch Biofilm Reactor(PSBBR)

利用驯化好的短程硝化污泥和小球藻结合的藻菌共生光序批式生物膜反应器(PSBBR)处理模拟养猪沼液,探究系统污染物去除效果、外加碳源需求、以及氮转化路径。结果表明,藻菌共生PSBBR的污染物去除效能优于纯污泥反应器,菌藻共生PSBBR运行37 d时,NH_(3)-N、TN、TP的去除率平均分别为96.25%、93.36%、82.66%,单位体积进水乙酸钠碳源投加量为973.69 mg/L,比传统生物脱氮技术节省碳源约60.5%。分析系统氮转化路径发现,在氮负荷为300 mg/(L·d)稳定运行阶段,NH3-N去除率约为96.6%,TN去除率约为95.3%,其中约88.5%的氮通过硝化反硝化去除,约6.8%的氮被生物吸收利用。

The domesticated short-cut nitrification sludge and chlorella combined algal-bacterial symbiotic photo-sequencing biofilm batch reactor(PSBBR) was used to treat simulated swine biogas slurry. The removal effect of system pollutants, additional carbon source requirements, and nitrogen conversion pathways were explored. The results showed that, the pollutant removal efficiency in the algal-bacterial PSBBR was better than that of the pure sludge reactor. When the algal-bacterial PSBBR operated for 37 d, the average removal rates of NH_(3)-N, TN, and TP were 96.25%,93.36%, and 82.66%, respectively. The dosage of sodium acetate carbon source was 973.69 mg/L, which saved about 60.5% of the carbon source content compared with the traditional biological nitrogen removal(BNR) technology. According to the nitrogen conversion path of the system, it was found that the removal rate of ammonia nitrogen was about 96.6% and the removal rate of total nitrogen was 95.3%, of which about 88.5% nitrogen was removed by nitrification and denitrification, and about 6.8% nitrogen was absorbed by biomass in the stable operation phase with a nitrogen loading rate of 300 mg/(L·d).