渔业水质标准

而在同安湾，NH4-N、NO2-N、DO和COD均达到了二类渔业水质标准，同时DO与COD，DO与NH4-N之间都存在较好线性关系。

The contents of DO , COD , NH4-N and NO2-N are coincided with the second class fishery water quality standard in Tong'an Bay , and DO is linear with other environmental factors well .

随着日处理量的增大，系统的去除率降低，但出水水质均符合《渔业水质标准》。2.比较研究A、B两套处理工艺对污水处理的效果。

The results indicated that the removal efficency decreased with the increasing of the treating quantity , but the effluent water complied with the water quality standard of fishery.2.Comparative study on the sewage treatment effect between A set and B set .

结果表明：大港湾海水中Cu，Pb，Cd，Zn的含量均低于渔业水质标准。

The results may be summarized as follows : The contents of Cu , Pb , Cd , Zn in sea water at the Dagang Bay are all below the Fisheries Water Quality Standard .

绝大多数猪场鱼塘水的砷含量已超过渔业水质标准0·05mg/L；

The arsenic concentrations in fish pond water exceeded the standard of fishery water quality of 0.05 mg / kg .

总体而言，生态养殖区的水质要明显优于水源区，基本上达到地表水环境质量标准中的3级标准和渔业水质标准的要求。

Thus , it can be concluded that the water quality in eco-culture area is better than that in water source area according to the eco-environment standard of the third grade of surface water and that of the crab-culture water quality .

铜对鲫鱼的安全质量浓度略低于渔业水域水质标准，锌、镉和铬的安全质量浓度远远高于标准。

The safe concentrations of zinc , cadmium and chromium to crucian are far higher than the standard .