| Recent years, there have been several large aquaculture enterprises and researchinstitutes, under the support of the major issue and the outcome of national factoryfarming, exploring the implementation of the factory farming mode of circulatingwater, and through the half smooth tongue sole, turbot, nektonic fish breedingexperiment have been successful, in particular, such as Shandong Laizhou Mingboaquaculture, Tianjin Haifa, Tianjin Lida Oriental and oceanography, and has becomethe leading representative of the factory recirculating aquaculture enterprises. But thefactory recirculating aquaculture system in process optimization, energy conservationand emissions reduction, equipment integration, facilities standardization, breedingmanagement standardization, there is still much room for improvement, especially inenergy-saving equipment integration and standardization urgent need to standardize.Factory based on energy conservation and emissions reduction process optimizationof circulating water aquaculture system, This work was financially supported bySpecial Fund for Agro-scientific Research in the Public Interest (201003024) andGram-negative sole class industry technology system（CARS-50-G10）. In domesticexisting facilities type circulating water system of the most commonly usedtechnology on the basis of, through large-scale circulating water system ofaquaculture production test, using different means of technology and systemparameter changes, test their influence on water for aquaculture environment, andbased on the test data analysis are discussed. Experiment results show that the systemprocess and parameter are ideal, can further for the future lay a theoretical foundationto optimize system technology.This paper consists of seven parts, the first is introduction, Chapter I is closedcirculating water breeding situation of industrialization, Chapter II is The effect of UV device location changed on water quality in enclosed recirculating aquaculturesystem, Chapter III is Effect of ozone dosing location changed on water quality inenclosed recirculating aquaculture system, Chapter IV is air-to-liquid ratio’s Impactson Treatment Efficiency of Wastewater in Multistage BAF of recirculationaquaculture system. Chapter V is the study of the closed circulating water systemcycle times, Chapter VI is the summary and outlook of this article.Chapter II UV disinfection device the loop hydraulic breeding system in pre-andpost different location application process to optimize the experimental study, theresults display ultraviolet sterilization device front will cause breeding pond inlet atthe increase in the total number of bacteria, including Vibriothan the back-end of anincrease of280times prone to farmed fish surface ulceration and analyzed UVgermicidal device should be set at the conclusion of the circulating water treatmentsystem backend. The ultraviolet front breeding pond inlet ammonia concentration of0.069mg/L, nitrite nitrogen concentration at0.024mg/L, COD concentration of1.135mg/L,120to3000of the total number of bacteria/ml, Vibrio number0~1400/ml. UV post-breeding pond inlet ammonia concentration of0.0946mg/L,nitrite nitrogen concentration in the0.0419mg/L, COD concentration of1.499mg/L,0to10the total number of bacteria/ml, Vibrio number0to5/ml of pond waterenvironmental safety be effectively guaranteed.Chapter Ⅲ conducted applied position and dosage of ozone in the watertreatment process change impact on the the culture water environment of thecirculating water system, the test found that ozone set in the case of the same dosagecompared to the back-end and front-end of the water treatment system better removalof breeding water, ammonia, nitrite, and fresh water quality and increase the dissolvedoxygen in aquaculture ponds have a more pronounced effect; ozone dosage on theback end, when the dosage of0.038mg/L, water qualityprocess is effective under theconditions of this condition, the breeding pool into the outlet nitrite nitrogenconcentration of0.0446mg/L, ammonia concentration is0.113mg/L, the CODconcentration is1.034mg/L, the DO is13.16mg/L, ORP is377mv. Chapter Ⅳ is air-to-liquid ratio’s impacts on treatment efficiency of Wastewaterin Multistage BAF and Experimental study of the influence of the pH and DO ofrecirculation aquaculture system, the experimental program designed air-to-liquidratio were0.75:1，0.88:1,1:1,1.25:1,1.50:1.the result showed that when theair-to-liquid ratio of1.25:1, the biofilter system to deal with water quality best; underthe working conditions, the biological filter pool outlet nitrite nitrogen concentrationof0.0351mg/L, ammonia concentration of0.1012mg/L, the COD concentration of0.9571mg/L, the DO is up to6.64mg/L, pH is8.07.Chapter Ⅴ conducted experimental research, the number of cycles of the thefactory recirculating aquaculture system based on the energy-saving half-smoothtongue sole study found that the number of cycles and the biological filter hydraulicretention time was not related, but the physical filter (curved screen, flotation proteinseparation) the number was positively correlated with a larger role in the removal andextermination system COD, and bacteria, the number of cycles is too large breedingpool flow pattern influential. Experimental results show that: the number of cycles inthe18water treatment works best breeding pool water quality conditions are asfollows: NH4-N, NO2-N, COD concentration of0.09mg/L,0.015mg/L,0.607mg/L.Chapter Ⅵ of the full text summary, and put forward some suggestions for futureresearch and outlook. |
PDF Full Text Request