摘要
【目的】探索适用于罗氏沼虾苗种培育的工厂化循环水处理模式,为提高罗氏沼虾苗种生产效益提供技术支撑,以促进罗氏沼虾养殖业的可持续发展。【方法】应用自行设计与装配的简装循环水处理系统对罗氏沼虾育苗废水进行处理再利用试验,以总氨氮(TAN)、亚硝态氮(NO2--N)、化学需氧量(COD)、pH等水质指标及细菌、弧菌数量对罗氏沼虾育苗废水的处理效果进行评价。【结果】在育苗早期,简装循环水处理系统处理罗氏沼虾育苗废水的效果不明显,但至育苗后期,其育苗池的各项水质指标均极显著低于靠换水的对照组育苗池(P〈0.01),水体pH8.12-8.14,TAN含量(约0.400mg/L)仅为对照组的22.1%,NO2--N含量终维持在0.265mg/L,仅为对照组的56.5%,COD含量维持在11.000mg/L左右。在整个育苗期间,采用简装循环水处理系统育苗池的细菌与弧菌总量分别为21000和2个/mL,均处于安全范围之内。经21d育苗运转,41:3育苗池均获得30%的出苗率,且罗氏沼虾幼体活性及体色方面无明显差异,但试验组总用水量仅为对照组的50%。【结论】简装循环水处理系统可有效处理罗氏沼虾育苗废水,将育苗池主要水质指标均控制在幼体发育变态的合适范围内,既能提高育苗用水的循环利用效率,又可减少育苗废水外排对环境造成的污染。
【Objective】The industrial recirculating water treatment mode suitable for breeding Macrobrachium rosenbargii larvae, in order to provide references for improving breeding benefit of M. rosenbargii larvae and promoting sustainable development of M. rosenbargii aquaculture. 【Method】The self-designed and assembled recirculating water treatment system was used to treat and recycle wastewater in breeding pond of M. rosenbargii larvae. And in production test, the water quality indexes viz., total ammonia nitrogen(TAN), nitrite nitrogen(NO2--N), chemical oxygen demand(COD), p H,and quantities of bacteria and vibrio were determined. Then treatment effect of recirculating water system on wastewater in breeding pond of M. rosenbargii larvae were evaluated. 【Result】The results showed that, at the early breeding stage, the treatment effect of recirculating water system on wastewater in breeding pond of M. rosenbargii larvae was not obvious; at the late breeding stage, all water quality indexes of treatment group were extremely significantly lower than those of control group(P0.01), and p H was 8.12-8.14, TAN content was about 0.400 mg/L, and only 22.1% of that of control group,NO2--N content was about 0.265 mg/L, and only 56.5% of that of control group, COD content maintained at around 11.000mg/L. Furthermore, during all breeding periods, the quantities of bacteria and vibrio were 21000 and 2 strains/m L, respectively, which remained within safety range. After breeding operation of 21 d, four breeding ponds had hatching rate of30%, with no significant difference in larvae activity and color. But, the overall water consumption of treatment group was only 50% of that of control group. 【Conclusion 】The simple recirculating water system can treat effectively wastewater in breeding pond of M. rosenbargii larvae, therefore, the main water quality indexes are controlled within an appropriate range, so as to improve efficiency of water utilization and decrease environmental pollution caused by effluent discharge from breeding pond.
出处
《南方农业学报》
CAS
CSCD
北大核心
2016年第1期140-146,共7页
Journal of Southern Agriculture
基金
上海市科委重点攻关项目(11391901400)
上海市虾类产业技术体系项目(沪农科产字[2014]第5号)
上海市农业领军人才计划项目(D8004140243)
关键词
罗氏沼虾
简装循环水处理系统
育苗废水
水质指标
效果
M.rosenbargii
simple recirculating water treatment system
wastewater from breeding larvae pond
water quality index
effect