查询词典 nitrogen-free

In this assessment, two groups of evaluation factors were used: one group is stipulated in "Environment quality standards for surface water (GB3838-2002)"; the other factors included main pollutants of Jinhe River, such as kjeldahl nitrogen, nitrite nitrogen, nitrate nitrogen and chlorophyll a, and the standards of some of them were given by the author on the basis of relative data.

在此评价中，采用了两组评价因子，一组是地表水环境质量标准(GB3838-2002)内的因子，一组除了标准内的水质因子，还包括了津河的主要污染物凯氏氮、亚硝酸盐氮、硝酸盐氮和叶绿素，这些污染物的标准是经过查阅资料自定的。

With the increase of soil organic matter,the mineralizable nitrogen,which is about 95 percent of soil total nitrogen,Was also increased,thus soil can provide more nitrogen.

随着土壤有机质含量的提高，大约占土壤全氮含量95%的可矿化氮量也随之增加，土壤供氮

It is concluded that the soil easily mineralizable nitrogen and microbial biomass nitrogen can be taken as the biological available index for soil nitrogen mineralization and availability in the pot experiment.

在盆栽试验条件下，土壤易矿化有机态氮和种植前土壤微生物态氮能够较好地反映土壤氮素的矿化和供应能力，可以作为土壤氮素的生物有效性指标。

The significant relationship was also found between the difference of easily mineralizable nitrogen before and after planting with soil net nitrogen mineralizable and plant nitrogen uptake.

结果表明，种植前土壤易矿化有机态氮和土壤微生物态氮以及种植前后土壤易矿化有机态氮的变化量均与土壤氮素净矿化量和植物吸氮量之间存在显著的相关性。

Cumulative NH4+-N is a good evaluating index of soil N-supplying not only for the first season crop, but also for two successive season crops. ND is more correct in revealing the potential mineralizable nitrogen when SON was regarded as mineralized N, although cumulative SON alone is not a good index for the potential of mineralizable nitrogen. And cumulative TSN could also be taken as an index for the potential mineralizable nitrogen to some extent.

淹水培养期间铵态氮累积量是评价可矿化氮的较好指标，不仅适宜于第一季作物，而且也适用于连续两季作物；SON累积量不能单独作为；SON累积量不能单独作为反映可矿化氮的指标，但用ND反映土壤可矿化氮潜势时，包括SON后更加准确；TSN在一定程度上能够反映土壤可矿化氮。

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。

The steam and nitrogen push uses steam as the heat source ,extra heavy oil or bitumen has been mobilized by conductive heating and rely on the action of gravity of condensed liquid to recovery heavy oil. Because nitrogen is noncondensible gas and its density is lower, nitrogen rise and accumulates in the top of the reservoir.

蒸汽―氮气辅助重力泄油的开采机理是以蒸汽作为热源加热油层，使高粘度的原油、沥青获得较好的流动性，利用气体和液体由于密度不同而产生的垂向分异作用，靠油的重力开采。

Using struvite sediment to remove the nitrogen in waste water has many advantages,such as high removal rate of nitrogen and reaction speed,small amount of sludge,reclaiming the ammonia nitrogen etc.

在废水处理中采用鸟粪石沉淀法脱氮，具有氨氮去除率高、反应速度快、污泥体积小的优点，同时可以回收氨氮。

In sparkle discharge ,following conclusions could be reached:(1) overall spectral intensity in nitrogen is lower than in oxygen . When water is added, integrality light intensity is lower compared with the pure gas condition.(2) No matter it is nitrogen or oxygen, when water is added, syllabify three spectral lines of atomic H: Hα(656.3nm), Hβ(486.1nm), Hγ(434.0nm) could be seen. What is more, when water is added into oxygen, the spectral line of H atom becomes stronger.(3) When discharge in pure nitrogen, the light intensity falls with the increasing gas flow rate. While if water is added, the light intensity will rises with the increasing gas flow rate.(4) When discharging in pure oxygen, the light intensity rises with increasing gas flow rate. While if water is added, with increasing gas flow rate the light intensity initially will change as this:first rise, then saturate at about 140l/h, finally falls.

在火花放电中：(1)氮气的整体光谱强度要弱于氧气的整体光谱强度，加水时的整体光谱强度比纯气体中放电小很多；(2)无论所通为氮气或氧气，加水时可以清晰的看到Hα(656.3nm)，Hβ(486.1nm)，Hγ(434.0nm)三条氢原子的谱线，而且在氧气加水的情况下产生的H原子的谱线要强些；(3)纯氮气中放电时随着气流量的增大放电光谱的强度随之降低，氮气加水放电时随着气流量的增大放电光谱的强度随之升高；(4)氧气放电时，随着气流量的增大，放电光谱的强度随之升高，氧气加水中放电时随着气流量的增大，放电光谱的强度开始随之升高，在140l/h时的值最高，接着就开始下降。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。