低温低C/N下改良Bardenpho工艺与多级AO工艺的比较

Comparison of Modified Bardenpho and Multi Level AO Processes under Low C/N Influent at Low Temperature

在冬季低温(9~13℃)和进水低C/N条件下,分别以改良Bardenpho工艺与多级AO工艺进行试验,探究水量负荷率为100%、130%和150%下两种工艺对污染物的去除效果,并在工艺原理、设计要点和建设运行成本等方面进行对比分析,并提出两种工艺的适用条件。结果表明,在相同的水力停留时间(HRT)下,多级AO工艺对TN有更好的去除效果,而对于COD_(Cr)、氨氮和TP,两者去除性能无较大差异;在建设和运行成本上,多级AO工艺可节省约11.43%的总占地面积和20%的运行电耗,但需要配套精确曝气系统才能发挥其节能优势。

Under the conditions of low temperature(9~13℃)in winter and low C/N influent,the modified Bardenpho process and multilevel AO process were tested respectively to compare the pollutant removal effects under water load rates of 100%,130%and 150%.The process principle,design points,construction and operation costs were compared and analyzed,and the applicable conditions of the two processes were put forward.The results showed that under the same hydraulic residence time(HRT),multi level AO process had better removal effect on TN,but there was no significant difference in the removal performance of COD_(Cr),ammonia nitrogen and TP.In terms of construction and operation costs,multi level AO could save about 11.43%of the total land occupation and 20%of the operation power consumption,but it needed to be equipped with a precise aeration system to give full play to its energysaving advantages.