硝化细菌净化养殖水体中氨氮实验

Experimental Study on Purifying Ammonia Nitrogen from Fishery Water by Immobilized Nitrifying Bacteria

污染养殖水体的主要因素是氨/铵(NH3/NH4+)和亚硝酸根离子(NO2-),用固定化粉末硝化细菌、浓缩液态硝化细菌对养殖用水污染源进行处理,比较各种处理对养殖用水中NH3/NH4+和NO2-的降解教果。实验证明硝化细菌能有效调节水环境p H,降低NH3/NH4+和NO2-的浓度,分解有机质,调节水环境的微生态平衡,水体中的NH3/NH4+和NO2-全程都控制在0.5 mg·L-1以下,符合鱼虾类养殖规范的要求。

The main factors of water pollution in aquaculture are NH3/NH4^＋ and nitrite ion. In this paper, the nitrifying bacteria which had been well enriched and cultured were used to degrade NH3/NH4^＋ and ammonia nitrogen in simulated fishery water. Results showed that there was a significant effect of nitrobacteria on decreasing the concentration of NH/NH4^＋ and ammonia nitrogen. It could keep the community structure of heterotrophic bacteria steady and adjust the balance of the micro-ecology in water, and then maintained NH3/NH4^＋ and ammonia nitrogen under 0.5 mg·L^-1, which was safe for fish and shrimp aquaculture.