硝化

Stable nitritation is realized because the nitrobacter is sensitive to the changing environment. When the dissolved oxygen and pH values in SBRⅠ and SBRⅡ are 2. 4-3. 0mg/L, 7. 0-8. 5, 1. 5-2. 0mg/L and 7. 0-8. 5 respectively, a lot of nitrate isn't found during operation in two months, and nitrosation rate is over 80% in two aerobic reactors.

将SBRⅠ、SBRⅡ好氧反应器的溶解氧、pH分别控制在7.0-8.5、2.4-3.0mg／L及7.0-8.5、1.5-2.0mg／L时，依赖SBR反应器水质波动大、硝酸菌对环境变化敏感的特点，在较高浓度NH〓-N条件下，实现了稳定的亚硝化反应，系统运行近两个月，没有大量硝酸盐的积累，两个好氧反应器的亚硝化率均在80％以上。

Benieficial bacteria like Nitrosomonas and Nitrobacter colonize the pore walls to promote ideal conditions for the biologican removal of ammonia and nitrite.

有益的细菌像亚硝化毛杆菌与硝化杆菌依附在孔壁上以加速对于氨与硝酸盐清除的理想环境。

Long running performance showed that due to the membrane interception,the nitrobacter is enriched in reactor in the interest of improving the nitrification rate;the maximum ammonia nitrogen loading can be 0.19 kg/(m3·d) with effluent ammonia nitrogen＜1 mg/L (removal rate 99%).

采用浸没式膜生物反应器处理焦化废水的试验结果表明：膜的截留作用可使硝化菌在反应器内富集而有利于提高系统的硝化能力，其去除氨氮的最高负荷为0.19kg/(m3·d)，出水氨氮＜1mg/L(去除率为99%)；泥龄长可能使微生物的代谢产物或其他大分子物质积累，从而

A submerged membrane sequencing batch bioreactor was used to treat coke wastewater.Long running performance showed that due to the membrane interception,the nitrobacter is enriched in reactor in the interest of improving the nitrification rate;the maximum ammonia nitrogen loading can be 0.19 kg/(m3·d) with effluent ammonia nitrogen＜1 mg/L (removal rate 99%).Long sludge retention time may result in the accumulation of metabolic products and high molecular materials,and thus inhibiting activity of nitrate bacteria and causing a ccumulation of NO2-,which is beneficial to the running of short-cut denitrif ication.However,too long retention time will affect the activity of nitrite bacteria,detrimental to the treatment effect of ammonia nitrogen.

采用浸没式膜生物反应器处理焦化废水的试验结果表明：膜的截留作用可使硝化菌在反应器内富集而有利于提高系统的硝化能力，其去除氨氮的最高负荷为0.19kg/(m3·d)，出水氨氮＜1mg/L(去除率为99%)；泥龄长可能使微生物的代谢产物或其他大分子物质积累，从而抑制硝酸盐细菌的活性，导致NO2-积累而有利于短程脱氮的进行，但泥龄过长也会影响亚硝酸盐细菌的活性，从而影响对氨氮的处理效果。

A submerged membrane sequencing batch bioreactor was used to treat coke wastewater.Long running performance showed that due to the membrane interception,the nitrobacter is enriched in reactor in the interest of improving the nitrification rate;the maximum ammonia nitrogen loading can be 0.19 kg/(m3·d) with effluent ammonia nitrogen＜1 mg/L (removal rate 99%).Long sludge retention time may result in the accumulation of metabolic products and high molecular materials,and thus inhibiting activity of nitrate bacteria and causing a ccumulation of NO2-,which is beneficial to the running of short-cut denitrif ication.However,too long retention time will affect the activity of nitrite bacteria,detrimental to the treatment effect of ammonia nitrogen.

简介： 采用浸没式膜生物反应器处理焦化废水的试验结果表明：膜的截留作用可使硝化菌在反应器内富集而有利于提高系统的硝化能力，其去除氨氮的最高负荷为0.19kg/(m3·d)，出水氨氮＜1mg/L(去除率为99%)；泥龄长可能使微生物的代谢产物或其他大分子物质积累，从而抑制硝酸盐细菌的活性，导致NO2-积累而有利于短程脱氮的进行，但泥龄过长也会影响亚硝酸盐细菌的活性，从而影响对氨氮的处理效果。

In this paper, a research was made on the treatment of nitrophenol removal ammonia wastewater from a coke-plant by sequencing batch reactors.

试验表明SBR法处理焦化废水可以取得良好的脱氮效果。在低溶解氧下，氨氮及总氮的去除效率均较高。对氮平衡的分析证实了好氧条件下也可发生反硝化作用，初步探讨了好氧反硝化的机理。

Then made them into immobilized cells respectively using polyvinyl alcohol and sodium alginate as carrier.The experiments werecarried out for the selection of nitrosification and denitrification conditions.

然后用聚乙烯醇和海藻酸钠作为载体将它们分别制成固定化细胞，单独作硝化和反硝化试验的条件选择。

The effect of PPC preoxidation on nitrification was conducted by measuring the quantity of nitrite bacteria and nitrate bacteria ,nitrosification performance and nitrification performance in the BAC process.

结果表明，高锰酸盐预氧化后的生物活性炭与单独生物活性炭上亚硝酸菌和硝酸菌的分布具有相同规律；但高锰酸盐预氧化后生物活性炭工艺中亚硝酸菌和硝酸菌数量、亚硝化速度及硝化速度都要高于单独的生物活性炭，这是高锰酸盐促进后续生物活性炭工艺去除氨氮和亚硝酸盐氮的主要原因

The activities of nitrosification and anaerobic ammonium oxidation of both activated sludge and biofilm also were studied. Results showed that the nitrosification rate of activated sludge was 2.89 times than biofilm. AOB was the dominate bacteria in activated sludge.

单级自养脱氮系统中的活性污泥及生物膜样品均具有亚硝化活性，其中活性污泥最大比氨氧化速率为0.234mgN/mgVSS·d，生物膜为0.081mgN/mgVSS·d，活性污泥亚硝化活性是生物膜的2.89倍左右。

Nitrosobacteria was selectively cultivated on the biofilm and short-cut nitrification was achieved in 4 weeks by controlling the following conditions as HRT=1 d, DO=0.5—1.0 mg·L-1, pH of about 7.5, T =30℃ and no sludge recycle.

结果表明，在控制HRT=1 d、温度30℃、DO=0.5～1.0 mg·L-1、pH=7.5左右、无污泥回流等条件下，经过4周的运行，成功地选择培养出亚硝化型生物膜，实现了短程硝化。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。