脱氮的

Flexicat yellow/blue catalyst produced by CRI was the fourth dehydrogenization catalyst which was used in Daqing 60KTA styrene equipment. We have taken effective ways and means to prolong the validity-period of the catalyst, including improving in-let temperature, adjusting the radio of steam/ethylbenzen, optimizing the operation of compressor etc.

CRI公司的Flexicat yellow/blue催化剂是大庆石化苯乙烯装置应用的第四批乙苯脱氮催化剂，在延长期采取了合理提高入口温度、合理匹配稀释蒸汽的用量、加强尾气压缩机的操作等有效的操作方法，使该催化剂从装填到卸载共运行了35个月，共生产苯乙烯210913吨，使用周期增加46%，增加经济效益1.5亿元。

The sludge settling characteristic is satisfying with SV varying from 22 to 30 and SVI varying from 58 to 80ml/g.The sludge bulking problem has been avoided successfully. The excess sludge can be thickened to 3%-4 %. The alkalinity remains equilibrious between the nitrification and denitrification in SBR-BAF system. The COD and TP loading of SBR are 2.08kgCOD/kgMLSS·d and 41.68gTP/kgMLSS·d, respectively. The NH4+-N loading of BAF is 1.16kgNH_4~+-N/m~3.d. The total HRT is about 10 hours which is only about half of suspended growth process for simultaneous phosphorous and nitrogen removal. Under the above mentioned high loadings and short HRT, the mean removal efficiency of COD, TP, NH4+-N, TN is 96%, 98%, 93%, and 84%, respectively. The mean effluent concentration of COD, TP, NH4+-N, TN, SS is 20mg/L, 0.23 mg/L, 3.24 mg/L, 7.68 mg/L, 5 mg/L respectively, which means every index can meet the first class of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant.

最后，以上述最佳运行参数控制SBR-BAF系统运行，长期运行结果表明：系统中悬浮污泥的絮凝、沉降性能良好，SV值为22~30，SVI值为58~80，不再有污泥膨胀之虞，而且可以对剩余污泥进行重力浓缩，浓缩后污泥浓度可以达到3~4%；短程硝化和反硝化使得系统可以维持碱度平衡，无需额外补充碱度；系统在高负荷(SBR反应器COD负荷为2.08kgCOD/kgMLSS.d，TP负荷为41.68gTP/kgMLSS.d，BAF反应器NH4+-N负荷为1.16kgNH_4~+-N/m~3.d)、低水力停留时间(SBR反应器9h，BAF反应器1h，总计10h，约为同步脱氮除磷悬浮污泥工艺的一半)下稳定高效运行，对COD(不计BAF加入的外碳源)、TP、NH_4~+-N、TN的平均去除率为96%、98%、93%、84%，出水COD、TP、NH4+-N、TN、SS的平均浓度为20mg/L、0.23 mg/L、3.24 mg/L、7.68 mg/L、5 mg/L，各项水质指标均达到《城镇污水处理厂污染物排放标准》(GB 18918-2002 )一级标准的A标准的要求。

Firstly, we chose ASM1 which was used successfully as the model platform after looking back the history of the activated sludge models. This research set up a simulation system of Anoxic-Oxic nitrogen removal process with modeling methods of IWA and Visual Basic computer software.

本文首先回顾了活性污泥数学模型的发展历程，选取目前应用较为成熟的ASM1作为建模平台，运用国际水协的建模思想，以Visual Basic计算机语言编制了A/O脱氮工艺的模拟系统。

Experiments discovered that over 10.5g/L influent salinity can inhibit the growth of nitrobacter, then results in the accumulation of nitrite and the short-circuit denitrification.

污水中的足够盐度能够造成硝化过程中亚硝酸盐的积累，形成短程硝化过程，这一发现对含海水城市污水的生物脱氮处理具有重要的理论意义与实用价值。

The results indicate that the high efficiency and stable performance of shortcut nitrogen removal in MBR-PBBR process is attributed to the predominance of functional microbiology Nitrosomonas eutropha during the period of operation,which occupies over 54%of total bacteria.However,large amount of organic carbon can destroy the predominance of N.eutropha,whose proportion decreased to 31%at TOC/N=0.3.The diversity of microbial community in MBR increases along with operating time.

结果发现，生物强化的MBR-PBBR工艺能实现相对稳定和高效的捷径生物脱氮，主要归功于MBR中的功能微生物Nitrosomonas eutropha在运行过程中始终保持优势地位，占全菌数的比例大于54%；然而，当外加有机碳源较高(TOC/N≥0.2)时，可动摇氨氧化菌的优势地位，N.europha占全菌数的比例在TOC/N=0.3时下降至31%。

Biogenic amines are basic nitrogenous compounds formed mainly by decarboxylation of amino acids or by amination and transamination of aldehydes and ketones.

生物胺是一类含氮的脂肪族、芳香族或杂环类低分子化合物，主要是通过氨基酸的脱羧或醛和酮的胺化和转氨基作用形成的。

With the rapid development of the industrialization and urbanization, as well as the promotion of comprehensive sewage discharge Standards, it is practical Significance to study and exploit the denitrifying phosphorus removal process which is economical, reliable and effective.

随着工业化和城镇化的快速发展，以及污水综合排放标准的不断提高，研究开发经济有效、运行可靠，占地小的同步脱氮除磷工艺具有非常重要的现实意义。

This paper detaily discussed the technical principle of activated-sludge process and the reaction mechanism of biological nitrogen and phosphorus removal in anaerobic period,anoxic period and aerobic period.

本文系统详细的论述了活性污泥法的工艺原理以及生物除磷脱氮工艺的厌氧、缺氧、好氧反应阶段的反应机理。

The study indicate that it is theoretically feasible that applying the optimized model of nitrogen and phosphor removal activated-sludge process established in the paper to municipal wastewater treatment plant designing and calculating

研究表明：用本文创建的活性污泥脱氮除磷系统优化模型来进行城市污水处理厂的工艺设计计算在理论上可行，用Mauab平台开发的优化设计程序ODP在实践上有继续深入研究开发的价值，具有良好的应用前景。

Finally, 20 strains aerobic denitrifying bacteria, which have higher denitrification efficiency, are isolated from the activated sludge, and the further research for the 3 strains out of the 20 are carried cot.

从完成驯化的污泥中筛选出20株具有较高脱氮效率的好氧反硝化细菌，并对其中的3株FW3、FW6和FR4进行了进一步的研究。

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。