盐度对未驯化微生物活性的影响

发布时间：2018-02-07 12:38

本文关键词： SBR 盐度微生物活性硝化反硝化　出处：《中国环境科学》2017年01期 　论文类型：期刊论文

【摘要】：取序批式活性污泥反应器(SBR)中未经驯化的污泥通过间歇实验测定含盐条件下的微生物活性,对比分析盐度对硝化菌和反硝化菌的影响.活性测定包括比氨氧化速率(SAOR:0~30gNaCl/L)、比亚硝酸盐氧化速率(SNIOR:0-15gNaCl/L)、比亚硝酸盐反硝化速率(SNIDR:0-35gNaCl/L)、比硝酸盐反硝化速率(SNADR:0-40gNaCl/L)、内源比亚硝酸盐反硝化速率(E-SNIDR:0-25gNaCl/L),内源比硝酸盐反硝化速率(E-SNADR:0-5gNaCl/L)、比耗氧速率(SOUR:0-30gNaCl/L)和脱氢酶活性(DHA:0-80gNaCl/L),结果表明,盐度为5gNaCl/L时,能够提高SNIDR和SOUR;15gNaCl/L时,SAOR和SNIOR的活性系数(AC)分别下降至46%和1%,亚硝酸盐氧化菌比氨氧化菌更容易受到盐度的影响;当盐度高于10gNaCl/L时(含10gNaCl/L),SNIDR和SNADR的AC比SAOR及SNIOR高,反硝化菌比硝化菌对盐度的耐受性更强;NaCl浓度高达80g/L时仍能检测出DHA,说明微生物仍具有催化氧化还原反应的能力.
[Abstract]:Unacclimated sludge from sequencing batch activated sludge reactor (SBR) was used to determine the microbial activity under salt condition by intermittent experiments. The effects of salinity on nitrifying bacteria and denitrifying bacteria were compared and analyzed. The activity measurements included the specific ammonia oxidation rate of SAOR0: 30 g NaCl / L, the specific nitrite oxidation rate of 30 g NaCl-L / L, the specific nitrite denitrification rate of 0-15 g NaClL / L, the specific nitrite denitrification rate of 0-35 g NaCl-L / L, the nitrate denitrification rate of SNADR0-40 g NaCl-L / L, the endogenous ratio of nitrite to nitrite. The denitrification rate is E-SNIDR: 0-25g NaCl-L, the endogenous specific nitrate denitrification rate is E-SNADR: 0-5g NaClL / L, the specific oxygen consumption rate is SOUR-0-30g NaClL / L) and the dehydrogenase activity is DHA: 0-80g NaCl-L / L, the results show that, When the salinity was 5 g NaCl / L, the activity coefficients of saor and SNIOR decreased to 46% and 1, respectively. Nitrite oxidizing bacteria were more susceptible to salinity than ammonia-oxidizing bacteria, and when salinity was higher than 10 g NaCl / L, AC of SNIDR and SNADR were higher than that of SAOR and SNIOR. Denitrifying bacteria could still detect DHA when the concentration of NaCl was as high as 80g / L, which indicated that microorganisms still had the ability of catalytic redox reaction.
【作者单位】：中国海洋大学环境科学与工程学院海洋环境与生态教育部重点实验室;
【基金】：国家水体污染控制与治理科技重大专项(2014ZX07203-008)
【分类号】：X703;X172

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