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1、有机物的污染:主要是城市生活污水及工业废弃物、废水等。城镇的污水中含有淀粉、蛋白质和脂肪等物质,这些物质在养殖水体中能被生物分解为天然有机物。在微生物的作用下,分解为氨基酸、脂肪酸、糖、甘油等化合物。还有一些无机物,这些物质在水中氧化时,需消耗水中大量的溶氧,致使水中的溶氧降低,当溶氧不足时,一些有机物就与还原产物亚硝酸盐、氨、
1, organic pollution: mainly urban sewage and industrial waste, waste water and so on. Sewage in cities contains substances such as starch, protein and fat, which can be biologically decomposed into natural organic matter in aquaculture water. In the role of microorganisms, broken down into amino acids, fatty acids, sugar, glycerol and other compounds. There are some inorganic substances, these substances oxidation in water, the need to consume large amounts of dissolved oxygen in water, resulting in reduced dissolved oxygen in water, when the lack of dissolved oxygen, some organic matter and the reduction products of nitrite, ammonia,