某城镇污水处理厂设计污水量为30000m3/d，设计2个缺氧一好氧活性污泥生化池。初沉池出水BOD5、TN、TKN分别为200mg/L、40mg/L、35mg/L。要求出水BOD5和TN分别小于或等于10mg/L和15mg/L。生化池污泥浓度为3000mg/L，污泥龄安全系数取1.5。污泥总产率系数取0.3，通过试验求得硝化菌的比生长速度为0.15d-1，则单个生化池好氧区的有效容积至少应为（）。
A．5700m3
B．4071m3
C．2850m3
D．1910m3
参考答案：C
解析：
生物反应池的容积，采用硝化、反硝化动力学计算时，好氧区(池)容积，可按下式计算：
注意单位换算。见《室外排水设计规范》(GB 50014—2006)第6.6.18—4条。
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