中文摘要：

牛田洋生产基地水产养殖的水质，经过研究和检测，其溶解氧、BOD，及Cr、Cd、Ph、Zn等金属离子的质量浓度，超过《渔业水质标准》（GB11607—89）的几十倍甚至几百倍，其水质远远低于渔业水质标准，从而大大影响了牛田洋区域的水产品产量和质量。针对牛田洋的水质情况以及现有养殖水质的净化技术，提出以下两种解决方案：一是植物净化法，在鱼塘内种植芦荻、茭白以及沉水植物轮叶黑藻、金鱼藻等来净化鱼塘水。二是采用水质净化的组合工艺：网栏（格筛）-混凝沉降（PAC＋PFS=I：1）-生物膜（生物滤池，塑料滤料）-后混凝沉降（PAC＋PFS=1：1）-砂滤（石英砂）-消毒（漂白粉）。

英文摘要：

The aquaculture water quality of Niutian Ocean production base was studied and tested, the dissolved oxygen, BOD5 and Cr, Cd, Pb, Zn and other metal ion concentrations were dozens and even hundreds of times more than the fishery water quality standard （GB 11607-89）. The water quality was far lower than the fishery water quality standard, which greatly influenced the output and quality of Niutian Ocean aquatic products. Based on the water quality situation of Niutian Ocean and the existing aquaculture water quality purification technology, two solutions were put forward as follows： one was plant purification method, planting water bamboo and submerged plant of blades black algae and homwort in fish ponds purified fishpond water; the other was to use a combination of water quality purification processes： net bar （grizzly） - coagulation sedimentation （PAC ＋ PFS = 1 ： 1） - biofilm （biological filter, filter material of plastic） - secondary coagulation sedimentation （PAC ＋ PFS = 1 ： 1） - sand filter （quartz sand） - disinfection （bleach）.