CODcr went beyond 2nd standard of sewage treatment plant a little in water quality without effective composite bacteria,while O3=0.24gO3/gMLSS.

• 未投加高效复合菌时出水COD_(Cr)略超出污水处理厂二级出水水质标准，此时O_3量为0.；24gO_3/gMLSS；