城市污水中易生物降解有机物的测定

易生物降解有机物(SS)是活性污泥数学模型应用中的关键性组分。针对批式呼吸计量法中SS积分区域划分不统一的问题,提出了SS积分区域理论划分的方法。采用该方法对上海2个大型污水处理厂的进水SS进行了测定。测定结果表明,该方法具有很好的重现性和准确性。在长距离输送的合流制污水的实测过程中发现,晴天条件下SS浓度及其在COD中所占的比例相对稳定,而暴雨对该组分具有明显的稀释作用。     

国产电解槽及新型管材的应用

总结了甘肃北方三泰化工有限公司氯碱生产装置应用国产电解槽、新型管材1年来的生产运行情况。     

EGSB-SBR组合工艺对城市生活污水处理的试验研究

采用EGSB+SBR组合工艺对邯郸市生活污水进行了试验研究.结果表明,在常温下进水COD为245～420mg·L~(-1),EGSB反应器的水力停留时间为3h,反应器COD容积负荷达到3.5 kg·m~(-3)·d~(-1),上升流速达到6.5m·h~(-1)时,COD去除率为95%(COD<60mg·L~(-1)),但氨氮去除效果不佳,故采用SBR工艺为后续处理工艺,其出水的氮、磷等指标达到国家一级排放标准(GB8978-1996).     

生活污水不同生物脱氮过程中N_2O产量及控制

利用好氧-缺氧SBR反应器和全程曝气SBBR反应器处理生活污水,分别实现了全程、短程和同步硝化反硝化脱氮过程,研究了不同脱氮过程中N2O的产生及释放情况,同时考察了不同DO条件下同步脱氮效率及N2O产生量。结果表明,全程、短程生物脱氮过程中N2O主要产生于硝化过程,反硝化过程有利于降低系统N2O产量。全程、短程、同步硝化反硝化脱氮过程中N2O产量分别为4.67、6.48和0.35mg.L-1。硝化过程中NO2-N的积累是导致系统N2O产生的主要原因。部分AOB在限氧条件下以NH4+-N作为电子供体,NO2-N作为电子受体进行反硝化,最终产物是N2O。不同DO条件下同步硝化反硝化过程中N2O的产生表明:控制SBBR系统中DO浓度达到稳定的同步脱氮效率可使系统N2O产量最低。     

不同国产纳滤膜对饮用水中氟离子的去除影响研究

选用两种国产纳滤膜NF1和VNF2进行除氟的实验研究,考察了不同的原水pH、操作压力、进水F-浓度、温度以及腐殖酸的浓度对纳滤除氟截留率以及膜通量的影响.实验结果表明:VNF2膜的截留率高于NF1膜,而膜通量则低于NF1;同时两种膜的最佳操作条件为pH在6.5～7.0,温度在18～23℃,操作压力为0.4 MPa,进水...     

Exogenous Application of Low-Concentration Sugar Enhances Brassinosteroid Signaling for Skotomorphogenesis by Promoting BIN2 Degradation

In plants, seedling growth is subtly controlled by multiple environmental factors and endogenous phytohormones. The cross-talk between sugars and brassinosteroid (BR) signaling is known to regulate plant growth; however, the molecular mechanisms that coordinate hormone-dependent growth responses with exogenous sucrose in plants are incompletely understood. Skotomorphogenesis is a plant growth stage with rapid elongation of the hypocotyls. In the present study, we found that low-concentration sugars could improve skotomorphogenesis in a manner dependent on BR biosynthesis and TOR activation. However, accumulation of BZR1 in bzr1-1D mutant plants partially rescued the defects of skotomorphogenesis induced by the TOR inhibitor AZD, and these etiolated seedlings displayed a normal phenotype like that of wild-type seedlings in response to both sucrose and non-sucrose treatments, thereby indicating that accumulated BZR1 sustained, at least partially, the sucrose-promoted growth of etiolated seedlings (skotomorphogenesis). Moreover, genetic evidence based on a phenotypic analysis of bin2-3bil1bil2 triple-mutant and gain-of-function bin2–1 mutant plant indicated that BIN2 inactivation was conducive to skotomorphogenesis in the dark. Subsequent biochemical and molecular analyses enabled us to confirm that sucrose reduced BIN2 levels via the TOR–S6K2 pathway in etiolated seedlings. Combined with a determination of the cellulose content, our results indicated that sucrose-induced BIN2 degradation led to the accumulation of BZR1 and the enhancement of cellulose synthesis, thereby promoting skotomorphogenesis, and that BIN2 is the converging node that integrates sugar and BR signaling.     

改良型多级A/O-MBR组合工艺对低C/N比生活污水的强化除磷

采用多级厌氧/耗氧膜生物反应器（A/O-MBR）组合工艺对低C/N比生活污水进行处理时,存在总磷（TP）处理不达标的问题。通过改变污泥回流位置并增加内回流的改良型多级A/O-MBR组合工艺强化除磷,探究该工艺对低C/N比生活污水中TP的去除效果,并通过污泥静态分析研究其污泥反硝化除磷机理。结果表明,改良型多级A/O-MBR组合工艺对TP去除效果良好,平均去除率达到了86.36%,同时对化学需氧量（COD）、总氮（TN）及氨氮去除效果良好,均达到一级A排放标准。该工艺提高了聚磷菌及反硝化聚磷菌的比例,有效强化了对TP的去除。     

热盘炉处置生活垃圾在我公司的应用

河北金隅鼎鑫水泥有限公司水泥窑协同处置生活垃圾项目采用了“机械生物法预处理+热盘炉焚烧”水泥窑协同处置工艺。文章介绍了项目工艺流程和主要设备特点，分析了项目改造过程中各个部分细节上的优化措施和经验，最后采取措施基本消除了协同系统对熟料生产的不利影响，保证了熟料质量，而且提升了熟料台时产量。     

国产转子与进口转子的分析比较

通过国产增产节能型郭与进口转子的运行特点对比、效率计算和振动的频率谱分析,比较两者的优缺点,同时也对国产转子提出了改进建议。     

进口压缩机气阀国产化及其应用

以兰州石化公司30万t/a全密度聚乙烯装置中2台WS2/190-B2型氮气压缩机气阀改进为例,介绍了国产气阀在进口压缩机上使用情况。