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当前位置: 首页 > 文章 > 不同pH和滤料对硝化细菌消氨效果的影响 渔业现代化 2017 (5) 7-11+18
Position: Home > Articles > Effect of pH and filter material on ammonia nitrogen removal by nitrifying bacteria Fishery Modernization 2017 (5) 7-11+18

不同pH和滤料对硝化细菌消氨效果的影响

作  者：
刘苏;杨宇晴;张海发;黄国光;黄培卫;黄锦雄
关键词：
硝化细菌;pH;滤料;氨氮;工厂化循环水养殖
摘  要：
为了解在不同pH和滤料条件下硝化细菌对氨氮(NH_4~+-N)和亚硝酸盐氮(NO_2~--N)的去除效果,通过试验,探讨了5.0~10.0等6个pH梯度以及陶环、珊瑚石、生物刷和生物球等4种滤料的消氨效果。在pH 8.0~9.0时,至试验第7天氨氮去除率分别达99.86%、98.95%,明显高于pH 6.0、7.0和10.0组(去除率分别为66.18%、71.43%和70.51%)。在pH 7.0~9.0时,亚硝酸盐氮浓度的增加小于氨氮浓度的下降,特别是在pH 9.0时两者浓度变化差异明显。生物刷、陶环、珊瑚石和生物球分别在试验的第3、4、6、7天,氨氮去除率达100%。陶环组和珊瑚石组,NO_2~--N质量浓度在达到最高值(9.60 mg/L和10.00 mg/L),之后开始逐步下降。生物刷组和生物球组在达到最高值(9.55 mg/L和11.00 mg/L)之后基本维持不变。结果表明:硝化细菌适宜碱性的环境条件(pH 8.0~9.0),水体pH 9.0最有利于硝化细菌对NH_4~+-N和NO_2~--N的去除。不同滤料对硝化细菌去除NH_4~+-N和NO_2~--N有不同的影响。陶环对硝化细菌去除NH_4~+-N和NO_2~--N都有良好效果,生物刷只对去除NH_4~+-N有良好效果,珊瑚石只对去除NO_2~--N有良好效果。多种滤料配合使用有利于产生优势互补的效果。
译  名：
Effect of pH and filter material on ammonia nitrogen removal by nitrifying bacteria
作  者：
LIU Su;YANG Yuqing;ZHANG Haifa;HUANG Guoguang;HUANG Peiwei;HUANG Jinxiong;Marine Fisheries Development Center of Guangdong Province;
单  位：
Marine Fisheries Development Center of Guangdong Province
关键词：
nitrifying bacteria;;pH;;filter material;;ammonia nitrogen;;industrial recirculating aquaculture
摘  要：
In order to understand the effect of ammonia nitrogen( NH_4~+-N) and nitrite nitrogen( NO_2~--N) removal by nitrifying bacteria when the pH and filter material are different respectively,we discussed the effect of NH_4~+-N removal through test when 6 pH gradients including 5.0-10.0 and 4 filter materials including ceramic ring,corallite,biofilters brush and biology-ball were used. When the pH was 8.0-9.0,the removal rate of NH_4~+-N was 99.86% and 98.95%respectively on the 7 th day of the test,which was high than pH 6.0( 66.18%),pH 7.0( 71.43%) and pH 10.0( 70. 51%). The increase of NO_2~--N concentration was less than the decrease of NH_4~+-N concentration when pH was7.0-9.0,and the great difference appeared at pH 9.0. When the biofilters brush,ceramic ring,corallite and biology-ball were used on the 3 rd,4 th,6 th and 7 th day of the test respectively,the removal rate of NH_4~+-N was 100%.When the ceramic ring and corallite were used,the concentration of NO_2~--N gradually declined after reaching the highest level 9.60 mg/L and 10.00 mg/L respectively; when the biofilters brush and biology-ball were used,the concentration almost remained unchanged after reaching the highest level 9.55 mg/L and 11.00 mg/L respectively.The results show that nitrifying bacteria are suitable for alkaline condition( pH 8.0-9.0),and water of pH 9.0 is most favorable to NH_4~+-N and NO_2~--N removal by nitrifying bacteria. Different filter materials have different effects on NH_4~+-N and NO_2~--N removal by nitrifying bacteria. Ceramic ring has a good effect on NH_4~+-N and NO_2~--N removal by nitrifying bacteria,biofilters brush only has a good effect on NH_4~+-N removal,and corallite only has a good effect on NO_2~--N removal. Mixed use of various filter materials will have complementary advantages.

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