Carbon saving, oxygen consumption reduction and cellular matter production reduction of Modified University of Cape Town (MUCT) process under different nitrate-nitrogen concentration in the main anoxic section was studied. This was investigated by material balance analysis, biochemical reaction process and its metrology of ordinary heterotrophic bacteria, denitrifying bacteria, nitrifying bacteria and phosphorus-accumulating bacteria. The flow and distribution of carbon, nitrogen, and oxygen in the MUCT, and the influence of the regulation of the c(NO 3 ) on the carbon source, cellular matter production, and oxygen consumption of the process were explained in detail. In the programmable logic controller (PLC) automatic control system, the circulating flow rate of nitrate was set as the controlled variable. Adopting the feedback control structure, c(NO 3 ) was altered at 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5 and 4.0 mg·17 −1 , respectively. In this experimental study, the quality of influent and other operation design parameters remained unchanged. The results showed that the effluent quality was at its best when c(NO 3 ) was controlled at 2.0–4.0 mg/L. Again, the distribution of chemical oxygen demand (COD) in the anaerobic section was between phosphorus-accumulating bacteria, common heterotrophic bacteria and denitrifying bacteria, and the distribution was related to c(NO 3 ). Due to this phenomenon, the distribution of nitrate-nitrogen between denitrifying bacteria and denitrifying phosphorus-accumulating bacteria, and poly-hydroxy alkanoates (PHA) between denitrifying phosphorus-accumulating bacteria and aerobic phosphorus-accumulating bacteria was changed. Carbon source of 110.0 kg acetic acid/10 3 m 3 sewage was saved, while the cell material output was reduced by 37.5%, and the oxygen consumption of 51.1 kg O 2 /10 3 m 3 sewage was reduced. In the MUCT process, the regulation of c(NO 3 ) enhanced the denitrifying phosphorus uptake performance of the main anoxic section and obtained good carbon source savings, reduction of cellular matter production, and reduction of oxygen consumption.

中文翻译：

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使用硝酸盐-氮浓度控制污水处理的来源、细胞物质产生和耗氧量

研究了改良开普敦大学(MUCT)工艺在主缺氧段不同硝态氮浓度下的节碳、减氧和细胞质减量。通过对普通异养菌、反硝化菌、硝化菌和蓄磷菌的物质平衡分析、生化反应过程及其计量研究。详细阐述了MUCT中碳、氮、氧的流动和分布，以及c(NO 3 )的调节对过程中碳源、细胞物质产生和耗氧量的影响。在可编程逻辑控制器（PLC）自动控制系统中，以硝酸盐的循环流量为控制变量。采用反馈控制结构，c(NO 3 )分别改变为0.5、1.0、1.5、2.0、2.5、3.0、3.5和4.0mg·17 -1 。在本次实验研究中，进水水质和其他运行设计参数保持不变。结果表明，当c(NO 3 )控制在2.0-4.0 mg/L时，出水水质最佳。再次，厌氧段化学需氧量(COD)分布在蓄磷菌、普通异养菌和反硝化菌之间，分布与c(NO 3 )有关。由于这种现象，反硝化细菌和反硝化聚磷细菌之间的硝态氮分布以及反硝化聚磷细菌和好氧聚磷细菌之间的聚羟基链烷酸酯（PHA）的分布发生了变化。110的碳源。节约了0 kg醋酸/10 3 m 3 污水，同时电池材料产量降低了37.5%，减少了51.1 kg O 2 /10 3 m 3 污水的耗氧量。在MUCT过程中，c(NO 3 )的调节增强了主缺氧段的反硝化磷吸收性能，获得了良好的碳源节约、细胞物质产生减少、耗氧量减少。