Advanced Materials Research Vols. 641-642

Abstract: To improve the efficiency of oily wastewater purification, a laboratory-scale anaerobic/anoxic/aerobic (A2O) membrane bioreactor was designed to treat the oily wastewater based on the conventional A2O activated sludge process and membrane separation technology, and the variation of bacterial community structure in the activated sludge of key reactors were investigated by PCR-DGGE (denaturing gradient gel electrophoresis). The result of Shannon diversity index comparing indicated that MBR seemed to be more constant than the A/0 system. Four sensitive dominant bacteria were verified in the treatment of oily wastewater. They were Uncultured Comamonadaceae bacterium, Hydrogenophaga sp., uncultured beta proteobacterium, and uncultured Thiobacillus sp. It suggested that PCR-DGGE can be used as an effective supplementary method for verifying cultural dominant microorganisms in activated sludge of oily wastewater.

Abstract: People’s demand for water resource is increasing continuously at this moment. People should desalt seawater based on pressure-gas distillation techniques in order to ease the tensions of water resource and to come out the comprehensive utilization of seawater. According to its principle, it is applied to the relatively systematic process design of the main evaporation equipment of the device of Seawater Desalination. Operating parameters and types of the other devices are also illustrated. This equipment has advantages of simple structure, low cost, easy to maintain and the strong ability in producing fresh water. It can accumulate valuable experience for future study of the device of seawater desalination.

Abstract: Preparations, Characterizations and Release Performances of Oxyresveratrol-Hydroxypropyl Cyclodextrin Inclusion and Pterostilbene-Hydroxypropyl Cyclodextrin Inclusion Are Reported.

Abstract: The effectiveness of the treatment to sewage water by using chitosan, sodium alginate and their complex as flocculating agent was investigated. It was discovered that parameters, such as pH value, temperature, speed and time of stirring, and setting time had direct relations with flocculants. Color/turbidity removing rate could be up to 90% with 15mgL-1 chitosan solution, while sodium alginate alone cannot act as flocculant since no floccules can be observed. Chitosan/sodium alginate complex flocculating agent was found to be an excellent coagulant which made a compliment with each other. The optimum dosage was 15mg L-1 chitosan plus 7.5mg L-1 sodium alginate for complex agent. The results of the orthogonal experiment showed that the optimum conditions to treating sewage water were 70°C for temperature, pH=5.5, fast stirring（600r/min or 900r/min） for 2min, plus slow stirring（100r/min or 300r/min） for 8min, and setting time 2.5h. In this case the chitosan/sodium alginate complex agent could achieve 100% color/turbidity removing rate and approximately 90.01% COD reducing rate.

Abstract: In order to determine the influence factors on daily water-injection rate of each well group, we collected actual production performance data of 65 well groups in eastern Nan 8 area, Daqing oilfield and statistically analyzed the dynamic and static parameters such as effective thickness, connected thickness, connected direction number, oil saturation, water cut and water cut rising velocity. Then we calculated the grey correlation degree between these 6 factors and daily water-injection rate by means of grey correlation analysis method. Results of the study show that, the major influence factors on daily water-injection rate are (from high degree to low degree) water cut rising velocity, oil saturation, water cut, connected direction number, effective thickness and connected thickness. This method can serve as guide for reasonable daily water-injection rate determination.

Abstract: The impact sensitivity is a very important property for indicating the safety, reliability and stability of high-energy-density materials (HEDM). A quantitative structure-property relationship (QSPR) study was used for prediction of impact sensitivity of some nitro compounds. Employing the square of nitro group charge (Q_NO2²) and OB₁₀₀ as the parameters, a good QSPR model was built for predicting H₅₀ of two sorts of nitro compounds. The predictive ability of the model was assessed by leave-one-out cross-validation method. The cross-validation results shows that the model is significant and stable, and its predicted accuracy is within 0.21 m. This quantitative model may be a useful tool for the design of HEDM.

Abstract: The study compared rhodamine B and methyl orange aqueous solution of sonochemical degradation kinetics, the influence of ultrasonic power, initial concentration, operating temperature on reaction rate. The experiment show that degradation reaction is free radical oxidation organic matter generated by ultrasonic cavitation, rhodamine B and methyl orange initial concentration of 0.5×10-5- 4.0×10-5 mol/L, operating temperature of 25°C - 55°C, when ultrasonic frequency of 19.6 kHz, ultrasonic power of 170-260 W. sonochemical reaction of rhodamine B and methyl orange are in line with first order reaction kinetics, and sonochemical reaction rate constant increased with increase of ultrasonic power, with increase of initial concentration decreases, the lower operating temperature; under the same experimental conditions, the rate of chemical reaction of rhodamine B sound greater than the rate of sonochemical reaction of methyl orange.

Abstract: Under different Electronic Expansion Valve (EXV)opening degree at the fixing frequency of 50hz of the compressor，we had test the system performance. When the cooling refrigerant influence to the PV module and the heating air influence to the collector／evaporator reached the balance，the photoelectric efficiency achieved the maximum．When the EXV opening degree fixing, with the raising of the solar radiation, the compressor power values appeared oscillation，and the oscillation was especially evident when the EXV at the maximum opening degree． So we put forward the PV/T-SAHP system stability principle．At the same time，we found that the key of the PV／T-SAHP research is to discover the relation between the solar radiation and the superheat of collector／evaporator．

Abstract: The two-step steam methane reforming for production syngas and hydrogen was investigated by using Ce-based oxygen carriers (CeO2, CeO2-ZrO2，CeO2-Fe2O3) which were prepared by co-precipitation method and characterized by means of X-ray diffractometer and Raman spectroscopy. CH4 temperature programmed and isothermal reactions were adopted to test syngas production reactivity, and redox properties were evaluated by a successive redox cycle. The results showed that the incorporation of ZrO2 into CeO2 was found to be an effective approach for enhancing the reducibility of CeO2 in methane conversion reaction and redox performance, and the addition of Fe2O3 into CeO2 could obviously increase the amount of reactive oxygen species in CeO2-Fe2O3 and the yields of syngas and hydrogen reached maximum in the 3rd cycle, but the redox stability of CeO2-Fe2O3 needs to be enhanced.

Abstract: Dichlorophenylphosphine(DCPP) was prepared by the catalyst of AlCl₃·XNaCl complex using C₆H₆, PCl₃ as raw materials. The influences of the catalyst amount, raw material ratio and the choice of extractant on the production rate were studied, as well as the recycling of the catalyst. Fourier transform infrared spectroscopy was employed to characterize the products. The results show that the products by experiments were dichlorophenylphosphine(DCPP). All above have some reference value for the industrial production.