摘要
为实现污水厂低碳氮比尾水深度脱氮除磷,考察以玉米芯为外碳源满足反硝化除磷最佳碳氮比要求时有机物及氮、磷的去除效果。在DO<0.3 mg·L-1条件下,SBR系统最佳进水C/N为6,此时出水TN和TP分别为3.57 mg·L-1和1.24 mg·L-1;投加玉米芯作为外碳源和生物载体构建SBBR系统,可将进水C/N从3.5提升至6,同时出水COD保持在40 mg·L-1左右,出水TN和TP分别降至3.04 mg·L-1和0.54 mg·L-1。研究表明,以玉米芯为固体碳源和生物载体的SBBR系统的脱氮除磷效果优于相同C/N条件下的SBR系统,玉米芯的粗糙表面和纤维结构为反硝化除磷菌提供了良好的缺氧环境和载体基础,使得SBBR系统的生物量及活性整体增强。
The efficiency of nitrogen, phosphorus and organics removal using corncob as a solid carbon source was investigated in order to achieve advanced treatment of secondary effluent with low C/N ratio. In a se- quencing batch reactor （SBR） system, the optimal C/N ratio of influent was 6 when DO 〈 0.3 mg·L-1, and the TN and TP of effluent were decreased to 3.57 mg · L-1 and 1.24 mg · L-1, respectively. Simulated second- ary effluent with a low C/N ratio of 3.5 could be promoted to 6 when using corncob as an external carbon source and biomass carrier in a sequencing biofilm batch reactor （SBBR） , and the TN and TP were decreased to 3.04 mg · L-1 and 0.54 mg ·L-1, respectively. The efficiency of nitrogen and phosphorus removal in SBBR system with corncob was higher than that of SBR system under the same C/N ratio. This might be attributed to the rough surface and fibrous structure of corncob, which provides an anoxic environment and carrier base for denitrifying phosphate-accumulating organisms, thus enhancing the biomass and bioactivity of SBBR system.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第9期4705-4710,共6页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(51308354)
国家水体污染控制与治理科技重大专项(2014ZX07202-011)
沈阳建筑大学学科涵育项目(XKHY2-50)
关键词
反硝化除磷
低C/N
玉米芯
固体碳源
denitrifying phosphorus removal
low C/N
corncob
solid carbon source
