不同pH和滤料对硝化细菌消氨效果的影响

发布时间：2018-06-15 17:59

本文选题：硝化细菌 + pH　；参考：《渔业现代化》2017年05期

【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。
[Abstract]:In order to understand the effect of nitrifying bacteria on the removal of NH _ 4- N ~ -N) and nitrite N _ 2O _ 2-N under different pH and filter media conditions, six pH gradients, such as 5.0 ~ 10.0, and four kinds of filter media, such as ceramic ring, coral stone, biological brush and biological ball, were studied. At pH 8.0 ~ 9.0, the ammonia nitrogen removal rate reached 99.86 ~ 98.95% on the 7th day of the experiment, which was significantly higher than that in pH 6.0 ~ 7.0 and 10.0 groups (the removal rates were 66.18% and 70.51%, respectively). At pH 7.0 ~ 9.0, the increase of nitrite nitrogen concentration is smaller than that of ammonia nitrogen concentration, especially at pH 9.0. Biological brushes, pottery rings, coral stones and biological balls were used in the experiment for 6 ~ 7 days, respectively, and the ammonia nitrogen removal rate reached 100. The mass concentration of No2 + -N in Taohuan formation and coral rock group reached the maximum value of 9.60 mg / L and 10.00 mg / L, and then began to decrease gradually after the concentration reached the maximum value of 9.60 mg / L and 10.00 mg 路L ~ (-1) 路L ~ (-1). After reaching the maximum value of 9.55 mg / L and 11.00 mg / L, the biological brush group and the biological ball group remained basically unchanged. The results showed that nitrifying bacteria were suitable for alkaline environment and pH 9.0 was most favorable for removing NH _ 4 ~ -N and no _ 2 ~ -N by nitrifying bacteria, and pH 9.0 in water was most favorable to the removal of NH _ 4 ~ -N and no _ 2 ~ -N by nitrifying bacteria. Different filter media have different effects on nitrifying bacteria removal of NH _ 4- N and no _ 2 ~ -N. The ceramic ring has a good effect on the removal of NH _ 4 ~ -N and no _ 2 N by nitrifying bacteria, the biological brush has a good effect on the removal of NH _ 4 ~ -N only, and the coral stone has a good effect on removing no _ 2 N only. The use of various kinds of filter media is beneficial to the effect of complementary advantages.
【作者单位】：广东省海洋渔业试验中心;
【基金】：公益性行业(农业)科研专项(201403011) 广东省海洋和渔业发展专项资金(201743) 广东省渔港建设和渔业发展专项资金(201611) 广东省海洋渔业科技与产业发展专项(A201400A01,A201500B01,A201600A02) 广东省科技计划项目(2015A020208002) 惠州市科技计划项目(2009B010001016)
【分类号】：X714

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