Use of fluidized bed biofilter and immobilized Rhodopseudomonas palustris for ammonia removal and fish health maintenance in a recirculation aquaculture system

文献类型： 外文期刊

第一作者： Zhan Peirong

作者： Zhan Peirong;Liu Wei

作者机构：

关键词： fluidized bed biofilter;recirculation aquaculture system;immobilized Rhodopseudomonas palustris;valveless filter;rainbow trout and common carp

期刊名称：AQUACULTURE RESEARCH （ 影响因子：2.082； 五年影响因子：2.415 ）

ISSN： 1355-557X

年卷期： 2013 年 44 卷 3 期

页码：

收录情况： SCI

摘要： Intensive recirculating aquaculture relies on biofilters to sustain satisfactory water quality in the system. Fluidized bed and immobilized cell technologies were used to remove ammonia from the water and maintain fish health. A high-rate nitrifying fluidized bed biofilter combined with valveless filter was designed for use in a recirculation aquaculture system (RAS). The suspended solids produced during fish culture could automatically be removed using a valveless filter. Natural porosity with fitting proportion, steady fluidization and expanding rate was chosen as the fluidized carrier. The technology of bacterial separation and cultivation was used. The immobilized Rhodopseudomonas palustris (R. palustris) produced through a biotechnologically embedding medium is suitable for fish and could help prevent diseases. Nitrification was promoted through the selective rearing of nitrobacteria in a fluidized bed biofilter. Water quality was improved using fluidized bed biofilter and immobilized R. palustris in the RAS. In addition, the proposed system was able to reduce costs. Maximum fish load was 45 +/- 3kgm3 in the closed recirculating water fish culture system, and water use was reduced by 8090%. The total ammonia nitrogen removal rate of the technology was 8095%, and nitrite N removal rate was above 80%.

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