升流式厌氧污泥床--压力式好氧接触氧化工艺处理制药废水的实践

采用升流式厌氧污泥床—压力式好氧接触氧化工艺处理锦州九洋药业有限责任公司制药废水,该工艺技术成熟、处理效率高,运行稳定可靠。结果表明处理后的出水水质可以满足排放标准的要求。     

UNITANK+接触氧化工艺处理制皂废水

采用 U NITANK系统和生物接触氧化工艺处理主要污染物为油脂、甘油等的制皂工业废水。经过试验研究 ,工艺参数选择和运行处理效果分析 ,结果证明 ,采用该工艺处理制皂工业废水 ,三格池好氧 U NITANK系统的容积负荷为1.5 kg CODCr/m3· d时 ,COD去除率可达 80 % ,接触氧化池的 COD去除率亦在 80 %左右 ,处理效果稳定     

印染废水处理工艺改造的实践与探讨

根据某印染废水的特点 ,在原有传统处理工艺的基础上进行了工艺改造 ,将调节池改为水解酸化池 ,将活性污泥曝气池改为接触氧化池 ,在池内形成了合理的微生物分布 ,大大地改善了出水水质 ,使 COD、SS、硫化物、色度的去除率分别提高了 2 2 %、10 %、36 .4%、2 5 %。既满足废水排放标准 ,又节约了土建资金。     

水解-酸化-好氧工艺处理染料废水的应用

介绍了水解-酸化-好氧工艺处理染料生产废水。长期运行结果表明，当染料生产废水的COD质量浓度〈2000mg．L^-1时，在水解反应器、酸化反应器和曝气池的水力停留时间（HRD分别为7．0，7．0和6．0h的条件下，出水可以达到国家二级排放标准。水解-酸化过程提高了染料生产废水的可生化性，为后续好氧处理创造了条件。     

Migration of saline solutions in variably saturated porous media

Migration of concentrated NaNO3 solutions in homogeneous packs of pre-wetted silica sands was investigated using a light transmission system. Solutions of 5 molal NaNO3 were found to migrate downward 24-62% faster than pure water, in an unstable, fingered manner. This behavior was attributed primarily to a surface tension induced, non-zero apparent contact angle between the imbibing and the resident fluids. For saline solutions of similar surface tension to that of pure water (achieved by the addition of 2% methanol), the migration rates and plume shapes were comparable to that of water, demonstrating that density was not the primary source of the observed differences in migration patterns. At depths where resident saturation increased above residual, the migration process appeared to occur via film flow with slight changes in saturation (<4%), rather than in a series of abrupt jumps, as observed at shallower depths. A method for contact angle scaling was used to illustrate the effects of non-zero contact angles on capillary pressure-saturation curves.     

混凝沉淀-水解-接触氧化-气浮工艺处理印染废水

介绍了采用混凝沉淀-水解-接触氧化-气浮工艺处理印染废水的工程应用，总结并分析了工程设计及运行的经验。运行结果表明，该工艺对CODCR，BOD5，SS，色度等均有良好的效果，出水水质达到GB4287—92《纺织染整工业水污染物排放标准》中的一级标准。     

水解酸化-接触氧化-混凝气浮工艺处理印染废水

采用水解酸化－接触氧化－混凝气浮组合工艺改造某印染废水处理工程，实践证明，该工艺具有处理效果好、出水水质稳定、操作管理方便、能耗低等优点，是处理该类印染废水的有效方法之一。     

高速公路生活区污水处理初探

通过对高速公路生活区污水特点的分析及各种生活污水处理的工艺比较向人们提供一种适合高速公路生活区污水处理的工艺。     

Study of mechanical aspects of leak tightness in a pressure relief valve using advanced FE-analysis

This paper presents a numerical study involving the deformation of contact faces in the metal-to-metal seal in a typical pressure relief valve. The valve geometry is simplified to an axisymmetric problem, which comprises a simple geometry consisting of only 3 components. A cylindrical nozzle, which has a valve seat on top, contacts with a disk, which is preloaded by a compressed linear spring. All the components are made of AISI type 316N(L) steel defined using the multilinear kinematic hardening model based on monotonic and cyclic tests at 20° C. In-service observations show that there is a limited fluid leakage through the valve seat at operational pressures about 90% of the set pressure, which is caused by the fluid penetrating into surface asperities at the microscale. Nonlinear FEA in ANSYS using the fluid pressure penetration (FPP) technique revealed that there is a limited amount of fluid penetrating into gap, which is caused by the plastic deformation of the valve seat at the macroscale. Prediction of the fluid pressure distribution over the valve seat just before the valve lift is addressed in this study considering the FPP interaction on multiscale. This is the principal scope, since it allows adjustment of the valve spring force in order to improve the leak tightness.     

A-O工艺处理沤麻废水的实验研究

通过中试研究了沤麻废水的处理,结果证明,上流式厌氧污泥床（UASB）－ 接触氧化工艺处理高浓度有机废水效果良好。CODCr去除率可达95％－97％,BOD5去除率达96％－99％,木质素去除率为75％－86％,每去除1kgCODCr可 产沼气0.349m^3,处理后的水回用沤麻,具有很好的经济效益 和环境效益。