Application Of Recirculating Water Treatment Technology In The Breeding Of Macrobrachium Rosenbergii

In 1976 China imported from Japan for artificial breeding of Macrobrachium rosenbergii experiment and the success in the country, has become an important shrimp of aquaculture species in china recent years, Macrobrachium rosenbergii seed breeding encounters many difficulties, the current artificial breeding of Macrobrachium rosenbergii larvae after years of good economic characters of part(such as growth performance and disease resistance and so on) have different degrees of decline; with the increasing size of Macrobrachium rosenbergii aquaculture, a serious impact on the surrounding environment caused by waterflooding, the entire industry diseases of Macrobrachium rosenbergii.And And has a chain effect of Macrobrachium rosenbergii; along with the industry development high density, high rate of water exchange mode of farming, aquaculture wastewater discharging,lots of organic and in organic pollutants inorganic pollutants enter the water, source water quality deterioration caused by the surrounding culture.Along with our country aquaculture scale has expanded each year, in urgent need of reform is too extensive farming model, coupled with the accelerated process of industrialization, the coastal aquaculture production space squeeze, which seriously restrict the sustainable development of aquaculture in china. Therefore, how to purify the breeding water, improve the breeding environment should become the focus of culture ecology research, research and development of effective breeding water purification system and related technology, the optimization of existing aquaculture mode, has a very important significance for the sustainable development of aquaclture in china. Industrialized recirculating aquaculture technology is environmentally friendly mode of production and strong applicability, good versstility, high efficiency,is one of the main direction of development of the aquaculture industry. industry, is an important way to realize the sustainable development of fisheries. This paper will focus on the industrial application of recirculating aquacultue, aquaculture in the two key stages of seed breeding of Macrobrachium rosenbergii(parent shrimp overwintering, breeding), to explore the feasibility of the application of circulating water treatment technology of Macrobrachium rosenbergii larvae in the production of the factory, to provide theoretical and practical basis for the development of new production technology of Macrobrachium rosenbergii. Circulating water of Macrobrachium rosenbergii experiment, choose two seedling pool as the experimental pool, pool two export control. The experimental design of the filter,an ultraviolet sterilizer and biological filter combined into a simple industrial circulating water treatment system for nursery experiments for 40 days. Four pools cloth seedling amount and aeration facilities and other basic conditions and production management.During the experiment, the experiment did not use and change the water pond, screening the best processing of circulating water flow system by experiment, in order to deal with every day a circulating water 12m3/h, 8 m3/h, 6 m3/h, 4m3/h flow, fixed time every day to take the system water treatment experiment experiment and and two water samples and the control pool water, used to determination of p H,TAN, NO2--N, CODMn, total amount of bacteria and Vibrio count and other indicators, which can be obtained for each flow removing harmful substances, so as to screen out the optimum flow rate of circulating water treatment system.After the experiment the best seedling experiments flow circulation processing, system optimum flow circulationwater treatment effect of experimental determination of breeding pool water treatment. Two sets of water treatment system in screening optimal flow circulation processing production experiment pond. The effective control of water quality index of seedling pool throughout the breeding cycle water treatment system, water chemical indicators and microbiological indicators are in the appropriate range, ammonia nitrogen, nitrite and CODMn average concentration of 0.506 mg·L-1, 0.344 mg·L-1 and 10.20 mg·L-1, p H 8.14, the total number of bacteria and Vibriowere 21000 cell·m L-1, 2 cell·m L-1. Breeding experiment pool and the control pool were obtained 30%germination rate, the results show that the circulating water treatment system can be effective treatment of Macrobrachium rosenbergii wastewater, the main quality index of seedling pool are controlled in the appropriate range of metamorphosis in larvae development.Macrobrachium rosenbergii broodstock wintering recirculating aquaculture experiment, experiment, two parent shrimp as the experimental pool, two export control pool. The Macrobrachium rosenbergii broodstock for Malaysia companies to introduce variety breeding offspring, each pool feeding about 600 tail, male and female in about 5:2, selection of Macrobrachium rosenbergii. Self cartridge filter, an ultraviolet sterilizer and biological filter and other equipment are assembled into a paperback of circulating water treatment system, the water after pre precipitation, river water after disinfection into the system for recycling treatment. In the administration, who did not change under the condition of circulating water treatment system, combined with thedevelopment period of overwintering experiment of 40 days, according to the situation of the water environment of shrimp over wintering dear during the experiment was divided into two stages.Water quality experiment results show that the experimental period(40d) water treatment can effectively control the over wintering parent shrimp pond water quality index of the system are in the appropriate range of total ammonia nitrogen, nitrite nitrogen, chemical oxygen demand and an average concentration of 0.469 mg·L-1, 0.273 mg·L-1 and10.35 mg·L-1; p H 7.53; bacteria, Vibrio the total number was 95683 cell·m L-1, 12 cell·m L-1. At the end of the experiment, two experimental pool breeding shrimp survival rate reached 97.4% and 93.1% respectively. The experimental results show that, the circulating water treatment system to maintain the dear shrimp over winteringsuitable water condition of Macrobrachium rosenbergii, provides a healthy parent for the production of greenseedlings, while effectively save water and reduce sewage discharge, circulating water treatment system can effectively use the regulation of Macrobrachium rosenbergii shrimp overwintering dear water environment, to ensure the smooth feeding dear shrimp overwintering, provides the scientific basis for the establishment and application of recycling water quality model of Macrobrachium rosenbergii dear shrimp pond in winter.