SBR工艺硝化脱氮过程研究

SBR法脱氮,硝化过程中碳氮比和温度对氨态、硝态、亚硝态氮的平衡和转化关系极其重要.人工配制固定浓度碳源、不同浓度水平氨氮废水的SBR工艺硝化实验表明:氨氮降解明显地分为两个阶段;进水氨氮浓度越高,氨氮自养硝化阶段降解速率越快,亚硝酸盐氮生成速率也越快.对不同温度硝化过程中亚硝酸盐氮进行研究,结果表明,在中温(20～30℃)下,通过调整pH值,亚硝酸盐氮不仅可以实现累积,而且温度越高,亚硝酸盐氮累积速率越快.     

低温下沉水植物塘对农村污染水体的净化作用

通过4种常见的沉水植物与基质组成的水生植物塘系统对模拟的农村污染水体进行净化处理,分析不同沉水植物在低温下的净化能力.结果表明：4种沉水植物对总磷（TP）、化学需氧量（COD）均有良好的处理效果,对TP和COD的去除率在80%以上,其中黑藻和金鱼藻对TP的去除率达到了97%;对氮的去除较明显,对总氮（TN）的去除率在54.27%～77.45%之间,对NH3-N的去除率在47.26%～60.79%;对营养物质的去除速率较快,最佳水力停留时间为2～3天.总体上看,低温下金鱼藻和黑藻对农村污染水体的净化作用较好,可作为沉水植物处理农村污染水体的优选物种.     

稳定塘对地下水影响耦合功能模型的研究进展

稳定塘是目前应用比较广泛的污水处理技术,如果塘系统防渗处理不当,会导致地下水的污染.把稳定塘中污染质的下渗过程看作一种单元系统,提出了概化的稳定塘中污染质下渗单元耦合功能模型,对各功能层的功能进行了描述.通过对国内外功能模型研究现状的分析,提出了符合我国现状的对策.     

序批式生物膜技术(SBBR)的应用及其发展

介绍了序批式生物膜技术（SBBR）的主要发展及其应用情况，同时对该技术的分类、运行方式及特点作了详细说明．水质、水量变化的频繁性及运行过程中各种不确定因素的出现，是许多污水处理机构面临的新问题，SBBR技术的提出为有效解决这一问题提供了新思路．SBBR是将SBR的间歇操作模式引入到生物膜反应器的全新应用，它集合了SBR和传统生物膜技术的优点，不仅可高效处理水力负荷变化较大的城市生活污水，实现脱氟除磷的深度处理要求，而且通过添加特殊膜材质作为填料对特种茵加以固定化后，可有效地处理含有毒有害、难降解和易挥发有机污染物的工业废水，因而具有较好的应用前景．     

Application of SBR-included pre-milled colored paste as a new approach for coloring self-consolidating mortars (SCMs)

Architectural construction has experienced considerable improvements via the recent developments of colored self-consolidating mortars (C-SCM). It is significantly important to prevent strength reduction in colored mortars when aiming at specific color intensities. In this research, the effects of phthalocyanine and iron hydroxide pigments on SCM and SBR latex modified SCM (LM-SCM) were studied. The influence of using pre-milled colored paste was investigated, as well. Experiments included tests on compressive strength, compressive toughness, flexural strength and flexural toughness. It was found that incorporating SBR latex to C-SCM mix design improved flexural properties and color intensity but decreased purity and led to porosity augmentation. Results also indicated that using pre-milled colored paste considerably improved mechanical properties, color intensity and purity and decreased porosity. Preparing pre-milled colored paste was found as an effective way to use low contents of organic pigments to create brilliant, intense and uniform colors in cement-based materials.     

SBR工艺受油类污染物冲击的过程及处理

结合生产中的实际运行情况,介绍了SBR甲醇废水处理装置受到油类污染物冲击时调节池和SBR池表现出的异常现象。从p H、COD、油类和微生物性状等方面的变化过程,分析了造成调节池和SBR池出现异常现象的原因,并提出了使系统恢复正常运行的有效措施。     

SBR工艺在乡镇小型医疗机构污水处理中的应用

农村小型医疗机构的医疗废水具有总排放量小,排放不均衡、波动大的特点,该文结合实际工程,对采用SBR工艺处理农村小型医疗机构的医疗废水进行探讨与总结。     

Thermophilic digestion of waste-activated sludge coupled with solar pond

Thermophilic anaerobic digestion (AD) is an efficient treatment process for waste activated sludge with enhanced hydrolysis and digestion rates. However, the costs associated with maintaining high temperature for thermophilic digester should be minimized and the thermal stability of the reactor should be maximized for its practical use. This study tested an integrated system consisting of a solar pond and an AD reactor for digestion of waste activated sludge. The integrated system could be stably operated at 51.6 ± 1.5 °C in sunny days (and nights) and maintained digestion performance over at least three days with cloud and rain. On the contrary, the control reactor without solar pond experienced significant temperature fluctuation and poor digestion performance. After 29d, the integrated system thermophilic reactor removed 65.0 ± 4.2% of total chemical oxygen demands and produced 79% excess biogas. The concentrations of soluble chemical oxygen demand, protein and saccharides in digester with solar pond were higher than those in that without the pond. Also, the presence of solar pond enhanced hydrolysis and degradation of soluble microbial byproduct-like compounds with carboxylic groups and amide-2 groups in sludge.     

Reinforcing mechanisms of carbon nanotubes and high structure carbon black in natural rubber/styrene‐butadiene rubber blend prepared by mechanical mixing − effect of bound rubber

The reinforcing effect of high structure carbon black (HSCB) and multi‐walled carbon nanotubes (MWCNTs) on natural rubber/styrene‐butadiene rubber blend processed using mechanical mixing was comparatively investigated. In‐depth analysis by dynamic mechanical analysis, the Eggers ? Schummer model and Medalia's relationship showed that HSCB aggregates provided large internal pores leading to significant immobilized macromolecules in filled rubber. Additionally, a tubular immobilized rubber layer with a thickness of 8 nm was estimated for the rubber/MWCNT system based on dynamic mechanical analysis data. The mechanical performance of the HSCB filled blend was higher than that of the MWCNT filled blend at the same loading which was correlated to its higher bound rubber content. Both bound rubber content and filler anisotropy were found to govern the overall mechanical properties of rubber/MWCNT composites. Stress softening was correlated with rupture energy suggesting hysteretic failure mechanisms in both MWCNT and HSCB filled rubbers. © 2015 Society of Chemical Industry     

SBR母料的研制及应用

SBR作为沥青改性剂,较难与沥青直接混溶,对设备要求高、工艺复杂.作者将SBR制成SBR母料,解决了上述难题.本文介绍SBR母料制备工艺流程及其对改性沥青性能的影响,并进行了社会经济效益分析.