序批式活性污泥法在炼油化工废水处理中的应用

炼油化工废水处理的传统处理工艺中存在一定的弊端。为此,玉门炼油化工总厂对其废水处理设施进行了改建和扩建,其生物处理系统采用了序批式活性污泥法处理工艺。经过 3年运行的结果表明:该系统运行效果良好,处理后的水质可达到《GB8978-1996》(石化)一级排放标准的要求;化学需氧量(COD)和生化需氧量(BOD)分别降低78.6%和91.2%,硫化物去除率为98.2%,挥发酚去除率为99.6%。而且该反应器具有较强的耐冲击负荷能力,进水中COD在600 mg/L以下且有大幅度波动时,该系统仍可稳定地运行,处理后的水可达标排放。     

移动床生物膜反应器充氧能力的试验研究

对移动床生物膜反应器的充氧能力进行了试验研究，结果表明：反应器充氧能力在添加填料比无填料时大；在悬浮载体能够均匀流化的填充率范围内，反应器充氧能力随着填充率的增大而增大；当填充率大于可以均匀流化的最大填充率时，反应器的充氧能力略有下降。     

瓷砖釉面TiO2薄层对甲基橙的光催化降解

采用溶胶-凝胶法，在瓷砖釉面上制备了良好光催化活性TiO2薄层材料，研究结果表明瓷砖釉面TiO2薄层材料对甲基橙的光催化反应遵循一级动力学规律，光催化降解率与液层厚度符合指数关系。在太阳光照射下，釉面瓷砖TiO2薄层材料能对甲基橙有效地降解。     

Starch- polyvinyl alcohol crosslinked film— performance and biodegradation

Starch-PVOH cast films were prepared with and without crosslinking agent (hexamethoxymethylmelamine) in the absence of plasticizer. Moisture absorption in films without crosslinking agent at a low relative humidity was similar to that of PVOH and increased as the relative humidity increased. Films with crosslinking agent showed moisture absorption linearly proportional to the relative humidity. Significant improvement in resistance to water disintegration for crosslinked starch-PVOH films was observed. While the tensile strength decreased with increased relative humidity, crosslinking significantly improved the tensile strength. Increased PVOH content improved elongation of films even when the relative humidity was 80% or higher. Biodegradation studies revealed that the degradation rate was negatively correlated with the PVOH content in films and crosslinking generated more converged degradation curves. Names are necessary to report factually on available data; however, the USDA neither guarantees nor warrants the standard of the product, and the use of the name by USDA implies no approval of the product to the exclusion of others that may also be suitable.     

活性炭膜处理工业废水的试验研究

将活性炭膜与常规弹性材料同时作为生物接触氧化处理工艺的填料,分别加装在相同条件的两套接触氧化池中,采用生物接触氧化处理工艺,在同样的条件下处理工业废水,经过对试验数据的对比分析得出:以活性炭膜为填料,处理废水的能力更强,净化效果更好。     

SBR法处理垃圾渗滤液及其同时硝化反硝化生物脱氮研究

采用SBR系统处理城市垃圾渗滤液，研究了不同C／N、130和MLSS对同时硝化反硝化脱氮效率的影响。结果表明：总氮去除率随着C／N、MLSS升高而上升；DO越低，总氮去除率越高；当进水CODCr与NH3-N浓度分别为420mg／L和112mg／L,DO和MLSS分别为1．5mg／L和5016mg／L时，CODCr、NH3-N及TN去除率分别为81．54％、96．57％和46．66％。根据试验结果，对同时硝化反硝化一个代表周期作了分析。     

螺旋升流反应器氧传递性能的试验研究

本文主要针对螺旋升流反应器技术特性，对工艺的好氧反应器进行了氧传递性能的试验研究，考察了反应器水深、曝气量等对螺旋升流反应器氧转移过程的影响；并对试验数据进行回归，得到了氧传质总系数与螺旋升流反应器内表现气速的数学关系。试验结果表明，螺旋升流反应器具有良好的氧传递特性，是一种新型的高效、节能的污水处理反应技术。     

从废感光胶片中回收银

研究了以Fe3 -乙二胺四乙酸二钠-N a2S2O3体系为浸取剂从废感光胶片中回收银的方法,考察了浸出银的最佳工艺条件。实验表明,当浸取剂中FeC l3.6H2O质量浓度为35g/L、N a2S2O3.5H2O质量浓度为150g/L、pH为7、固液质量比为3∶10时,浸取剂可重复使用6次,胶片上银的浸出率可达99%以上;浸取液中的银采用硼氢化钠还原回收,粗银粉配以熔剂高温熔炼可得到纯度达99.78%的银,银回收率达96.88%,回收银后的浸取液可循环使用。     

Mechanical Properties with the Functional Group of Additives for Starch/PVA Blend Film

This paper deals with the mechanical properties and degree of swelling (DS) of starch/PVA blend film with the functional groups i.e., hydroxyl and carboxyl group, of additives. Starch/PVA blend films were prepared by using the mixing process. Glycerol (GL) with 3 hydroxyl group, sorbitol (SO) with 6 hydroxyl group, succinic acid (SA) with 2 carboxyl group, malic acid (MA) with 1 hydroxyl and 2 carboxyl group, tartaric acid (TA) with 2 hydroxyl and 2 carboxyl group and citric acid (CA) with 1 hydroxyl and 3 carboxyl group were used as additives. The results of measured tensile strength (TS) and elongation (%E) verified that both hydroxyl and carboxyl group as a functional groups increased the flexibility and strength of the film. Values of DS for GL-added and SA-added films were low. However, DS values of the films added MA, TA or CA with both hydroxyl and carboxyl group were comparatively high. When the film was dried at low temperature, the properties of the films were evidently improved. The reason is probably because the hydrogen bonding was activated at low temperature.