CAJ | 학술논문

为解决冷水鱼养殖过程中养殖水体中的氨氮累积问题，根据低温生物滤器及臭氧催化氧化处理氨氮的特点，设计了冷水鱼工厂化养殖氨氮处理系统并进行了试验。试验基于以臭氧氧化为主、低温生物处理为辅的处理工艺，试验鱼为虹鳟鱼，养殖密度为23 kg/m3，试验水体约为10 m3，试验周期为7 d。结果表明，该系统能够满足冷水鱼工厂化养殖过程中有关氨氮处理的水质指标要求，处理后的养殖池进水口的水质指标总氨氮≤0．18 mg/L，硝酸盐氮氮≤29．43 mg/L，亚硝酸盐氮氮≤0．1 mg/L；养殖水体氨氮浓度监测表明，臭氧在水中残留低于0．008 mg/L，符合养殖鱼类对水体臭氧浓度的安全要求。
위해결랭수어양식과정중양식수체중적안담루적문제，근거저온생물려기급취양최화양화처리안담적특점，설계료랭수어공엄화양식안담처리계통병진행료시험。시험기우이취양양화위주、저온생물처리위보적처리공예，시험어위홍준어，양식밀도위23 kg/m3，시험수체약위10 m3，시험주기위7 d。결과표명，해계통능구만족랭수어공엄화양식과정중유관안담처리적수질지표요구，처리후적양식지진수구적수질지표총안담≤0．18 mg/L，초산염담담≤29．43 mg/L，아초산염담담≤0．1 mg/L；양식수체안담농도감측표명，취양재수중잔류저우0．008 mg/L，부합양식어류대수체취양농도적안전요구。
In the recirculation aquaculture system, ammonia, one kind of byproduct from the digestion of protein, is the principal nitrogenous waste released by fish. When the ammonia is accumulated and reached high level concentration, it can slow down fish growth and cause tissue damage, even death. Based on the performance of bio-filter and ozone oxidation, an effective ammonia disposal system was designed, which mainly used ozonation of ammonia and bio-filter assisted. Generally, ozone can oxidized ammonia by 25. 8%directly, during the efficient of oxidation, adding some catalytic agent can increased it. The efficiency of bio-filter disposing ammonia would be decreased in lower temperature. In order to measure the capacity of disposing ammonia, an experiment was carried out in a cold water fish culture system. The experimental result shown that The design can meet the requirements of water quality index that regarding the handling of ammonia nitrogen in cold water fish factory farming , ammonia≤0.18 mg/L,nitrate≤29.43 mg/L,and nitrite≤0.1 mg/L. Meanwhile, the concentration of ozone in fish culture tank and circuit water tank was measured to ensure the safety of dissolved ozone to cultured fish and bio-filter. The residue of ozone in the water was below 0.008 mg/L, which showed that the treatment process was reliable and safe.