河口区室内幼虾养殖循环水处理技术与模式

The technique and mode of treating circulation water for indoor shrimp culture at estuary area

利用臭氧与生物滤器循环水处理系统进行室内南美白对虾幼虾养殖。试验期间,按48～72h间隔以臭氧处理养虾循环水2h、曝气2～4h。水处理期间,暂停处理池、养虾池间水循环,过滤系统持续运转。53d中,水处理系统有效控制养殖水质化学指标与微生物指标均在合适范围内,各指标平均值为:NH3-Nt0.41mg·L-1,NO-2-N0.057mg·L-1,COD10.12mg·L-1,氧化还原电位379mV,浑浊度0.6NTU,细菌总数10200cell·mL-1,弧菌数6cell·mL-1;同时获得较高的幼虾成活率(78.3%～80.2%)。根据试验结果与河口水特点,提出了河口区室内养虾循环水处理模式。

Penaeus vannamei juvenile was cultured making use of the system of treating circulation water with ozone and biofilter indoor at estuary area. The circulation water was treated with ozone and biofilter for 2h at 48-72h intervals, then aired for 2h. The water circulation among treating pond and shrimp ponds was temporarily stopped, filtering system continually ran during treating water. The quality criteria of the circulation water for the shrimp juvenile culture was controlled within suitable range for 52d. The average values of the criteria are as follows: NH3-Nt 0.41mg·L-1,NO-2-N 0.057mg·L-1,COD 10.12 mg·L-1, oxidationreduction potential(ORP)379mv,turbidity 0.6 NTU, bacterial total 10 200 cell·mL-1, vibrio total6cell·mL-1, juvenile survival rate 78.3%-80.2%.The mode of treating circulation water of indoor shrimp culture at estuary area is put forward according to the test result and the characteristic of estuary water.