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广西工厂化循环水养殖石斑鱼水质处理效果 总被引:1,自引:0,他引:1
通过集成海水养鱼、生化处理、设施工程、环境工程、电器自控和水质监控等技术,建立一套适合广西地区应用的工厂化循环水石斑鱼养殖系统。该养殖系统处理流程为:鱼池→沉淀池→蛋白质分离器→生物滤池→海马齿浮床→紫外杀菌,生物滤池包括A、B、C三个通道,A、B通道均由珊瑚石作为一、二级生物过滤和生化球作为三级过滤,C通道由珊瑚石作为一级过滤和椰子壳碎作为二、三级过滤。结果显示:沉淀池处理可以显著降低鱼池的COD,氨氮、亚硝酸盐氮、硝酸盐氮和磷酸盐的质量浓度(P<0.05);经海马齿浮床系统处理后,硝酸盐氮质量浓度显著低于沉淀池、蛋白质分离器处理池、生物滤池A、B通道(P<0.05);整体上,C通道水质指标略低于A、B通道,但差异不明显(P>0.05)。该研究结果可为广西沿海发展循环水养殖技术以及养殖生产方式转变提供可靠的科学数据和技术参考。 相似文献
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上世纪90年代以来,由于近海污染,海水养殖业效益滑坡,出现了部分养殖池被荒废的萧条局面。2000年起,我们在原市滩涂开发实验场,利用废弃的虾池,连续三年进行了“半封闭式循环水养殖对虾综合试验”技术研究,均取得成功。专家认为,该技术符合水产养殖健康、可持续发展的要求,为滩 相似文献
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封闭式循环水养殖牙鲆鱼技术初步研究 总被引:8,自引:0,他引:8
将新功能滤料、高效混合净水菌团、水质自动监测及控制3项关键技术及配套设备用于封闭式循环水养殖牙鲆鱼。结果表明,封闭循环组成活率可达到90%-95.1%,平均产量为32.2kg/m^2。较对照组养殖密度增加75.6%-102.7%,成活率提高14%-17%,平均产量增加145%-187.5%。充分利用有限的水体,避免海水二次污染,利于环境保护。 相似文献
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利用先进的工厂化水产养殖技术与设施进行的全封闭高密度循环水养殖,具有节水、节地、节能、环保等优点。其成功的关键在于对养殖水体的水质调控。以下就陆基水产养殖的水质调控技术作一介绍。 相似文献
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一、目的地处西北内陆的甘肃省天水市,水产人工养殖已有30多年的历史,主要以池塘静水养殖为主,近年来,为了积极发展现代农业,提高农业综合生产能力,提升水产养殖技术水平,增加养殖户经济收入,充实全市人民菜篮子, 相似文献
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封闭式循环水饲养青石斑鱼试验 总被引:2,自引:0,他引:2
在封闭式循环水养殖系统中以全人工配合饲料制成软颗粒饲料投喂青石斑鱼幼鱼,经过33d的饲养,青石斑鱼尾相对增重率为64.6%,平均饲料系数为1.81,养殖成活率95.89%,平均丰满度为1.66。封闭式循环水养殖系统的养殖排出水回收率达到85%以上,养殖单产、饲料效率、生长速度都达到了生产要求。 相似文献
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封闭循环水养殖南美白对虾的水质动态研究 总被引:7,自引:0,他引:7
在2002年进行r南美白对虾(Penaeus vannamei Boone)工厂化循环水养殖试验,研究投饵和不同的养殖密度对水质(NH3-N,NO2^-—N和CODMn)的影响,以及工厂化养殖水处理系统对水质的作用效果。结果表明:在循环水(前期每天换水1次,后期2~4h换水1次)条件下,投饵对养殖池水质没有影响,不同养殖密度时养殖池的水质无显著不同,养殖密度对水质没有影响。定期测量不同养殖密度下对虾的体长和体重,结果是不同处理间也没有显著差异(LSD0.05)。建立的养殖水处理系统是一个包括斜板沉淀池、筛网过滤、泡沫浮选装置、生物滤池、臭氧发生器、石英砂过滤和水温调节池的系统。在3个月的南美白对虾养殖期间,氨态氮的最大去除率是85%,但是亚硝态氮的去除率只有44%;系统对COD的作用不明显,但能很好的控制水温、溶氧和pH。 相似文献
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Shulin Chen David E. Coffin Ronald F. Malone 《Journal of the World Aquaculture Society》1997,28(4):303-315
Waste discharge from recirculating aquacultural systems is typically in the form of sludge composed of partially stabilized excreta, uneaten food particles, and bacterial growth. The amount of solids produced can be estimated using an equation presented in this paper. In a typical recirculating system, total suspended solids (TSS) is the major pollutant of the sludge produced. The production of TSS ranges from 10 to 30% of the feeding rate on a dry weight basis. The ratio of 5-d biochemical oxygen demand to total suspended solids (BODS /TSS) of the sludge ranges from 0.10 to 0.2, the total Kjeldahl nitrogen (TKN) content of the TSS ranges from 4 to 6%, and total phosphorus ranges from 0.2 to 2%.
The nature of the waste and the economics of the treatment processes dictate the disposal of aquacultural sludge. Effective clarification of aquacultural waste is critical in reducing sludge volume. Using lagoons for stabilization and storage is the most practical option. While direct disposal by land application seems feasible for rural areas with dry climates, additional stabilization/storage in a lagoon with eventual disposal through land application seems most feasible for a variety of conditions. The effluent produced from the sludge treatment processes can be used for irrigation or for direct discharge after further polishing (treatment). 相似文献
The nature of the waste and the economics of the treatment processes dictate the disposal of aquacultural sludge. Effective clarification of aquacultural waste is critical in reducing sludge volume. Using lagoons for stabilization and storage is the most practical option. While direct disposal by land application seems feasible for rural areas with dry climates, additional stabilization/storage in a lagoon with eventual disposal through land application seems most feasible for a variety of conditions. The effluent produced from the sludge treatment processes can be used for irrigation or for direct discharge after further polishing (treatment). 相似文献
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Jason J. Danaher R. Charlie Shultz James E. Rakocy Donald S. Bailey 《Journal of the World Aquaculture Society》2013,44(3):374-383
Aquaponics is an integrated fish and plant recirculating production system. The University of the Virgin Islands' raft aquaponic system uses a cylindro‐conical clarifier as a primary solids removal device; however, a swirl separator may offer advantages. The objectives of the 8‐wk experiment were to compare water quality parameters, Nile tilapia, Oreochromis niloticus, production and water spinach, Ipomoea aquatica, production in a raft aquaponic system using a clarifier or swirl separator for primary treatment of solids in the waste stream . No significant differences (P ≥ 0.05) existed between treatments for temperature, oxygen, pH, total suspended solids, alkalinity, electrical conductivity, total ammonia‐nitrogen, nitrite‐nitrogen, nitrate‐nitrogen, macronutrients, and micronutrients concentrations in the culture water. There were no significant differences (P ≥ 0.05) between treatments for Nile tilapia production, average weight, survival, or feed conversion ratio. There were no significant differences (P ≥ 0.05) between treatments for water spinach production or plant tissue analysis. In conclusion, the swirl separator used in this experiment performed similar to the clarifier and water spinach grew vigorously in the raft aquaponic system . 相似文献
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The zebrafish is an established vertebrate-animal model in biomedical research. Currently, their mass culture is mainly done using systems provided by commercial suppliers. Commercial systems are compact, recirculating, and use auto-cleaning tanks. These features minimize space use, labour cost, and water wastage; thus, facilitating maintenance of a large number of zebrafish using minimal resources. However, the often considered costs associated with these systems often impose a barrier to current and prospective researchers, especially those with limited funds or working in labs with no access to institutional centralized zebrafish culture facilities. In contrast to commercial systems, custom-made zebrafish maintenance systems are also described in the literature. To distinguish custom-made system from commercial systems, we termed them as “open-design” systems. Open-design systems are cost-effective, modular, and frequently being improved by zebrafish researchers. However, for further development and to present them as a viable option for zebrafish researchers around the world, a review of their current status and technical understanding is required. Here, we compile the disparate data on the purpose and technological development of the open-design systems. We believe this review will be a valuable resource for all zebrafish users and help streamline the open-design technology for zebrafish culture. 相似文献
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封闭式循环流水养鱼系统水质循环过滤单元概述 总被引:7,自引:1,他引:7
封闭式循环流水养鱼又称工业化、工厂化养鱼,是水产养殖业在向现代化、企业化、规模化方向发展过程中产生的一种新的养殖方式,它充分运用现代先进技术和手段,可以人工控制鱼类的生活环境,使养鱼过程完全摆脱自然环境条件的限制,从而实现了高密度、高产量和高效率的渔业生产。我国从20世纪70年代开始研究工厂化养 相似文献
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采用一套自主开发研制的加压溶气气浮装置,对养殖水体中的微颗粒进行净化。选取液位高度、液体流量、溶气压力进行单因子试验和正交试验,单因子试验结果表明,液位0.8 m具有浊度去除的最佳效果;液位1.0 m对浊度去除率和pH的增加率的影响较显著;液体流量为400~600 L/h时,浊度去除率最大;液体流量为200~400 L/h时,溶解氧和pH增加率最大;溶气压力为0.5 MPa时,浊度的去除率达到了最大值的72%,同时,pH的增加率也达到了最大值,溶气压力为0.4 MPa时,溶解氧的增加率达到了最大值;通过正交试验得到三因素的最优组合为:液位高度1.0 m、液体流量200~400 L/h、溶气压力0.4 MPa。 相似文献
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