Advanced Materials Research Vols. 807-809

Abstract: CO₂ Sequestration with Enhanced Gas Recovery (CSEGR) is one of the efficient and attractive scenarios to reduce CO₂ emission and accelerate gas field to produce more natural gas simultaneously. We review the correlational experiments, simulations and economic feasibility research about technical and economic problems of CSEGR. And the potential of natural gas increase production and CO₂ emission reduction in China by CSEGR is calculated. The pilot projects and simulation results show that CSEGR is technically feasible when suitable injection strategies and field management are implemented. However, economic feasibility is available only via policies of carbon credit, allowance and trade. Accurate experimental data would ensure the authenticity of key simulation parameters and reliability of simulations, but the existed experimental data is scarce. More experimental researches should be conducted to obtain a great quantity of accurate data which can make the simulation more close to the actual situation. Accordingly, the pilot projects and large-scale applications of CSEGR could be implemented successfully.

Abstract: Using hydrolytic acidification-AO process treating coal gasification wastewater, the COD, total phenols in the effluent and the removal efficiencies were studied. The start-up period was separated to two stages with influent COD concentration of 1500 and 2500mg/L. After 59 days operation, the COD and total phenols removal efficiencies were 80.3% and 72.9%, respectively. The COD and total phenols increased to 925.4 and 238.7mg/L when the HRT was reduced to 6h with the corresponding concentrations of influent were 2512.9 and 493.4mg/L. When the HRT in hydrolytic acidification was reduced to 100%, the removal of total phenols dropped from 75.4% to 57.6%. The bigger circle ratio of 500% didn't have obviously effect on total phenols removal of the process.

Abstract: Rainwater harvesting from roof is considered as valuable water resources. Material Flow Analysis (MFA) of water in Mahasarakham University (Khamriang Campus) shows that rainwater harvesting from roof can reduce water supply production by 7% and save more than 200,000 Bt/year for water treatment cost. The sensitivity analysis suggests that by 5% water supply conservation and 20% additional rainwater harvesting, MSU could have enough water resources. The rainwater is suitable to be substituted water for gardening due to the convenience to assemble an above ground storage tank or a pond to store harvested rainwater from roof. The current practice of rainwater is collected and discharged into drainage system and treated in wastewater treatment plant. Utilisation of rainwater harvested could reduce wastewater amount that must be treated by 9%. Rainwater harvesting and reuse should be promoted in campus in order to encourage sustainable living and water conservation policy.

Abstract: By testing water quality analysis of part of the import and export of wastewater pretreatment facility catering units in Kunming shows that these pre-processing facilities catering units emit water SS, COD, BOD5, Anionic Surfactants and Animal and Vegetable Oils compliance rate is not high, exceeded the phenomenon is more serious .It shows most pretreatment facilities catering units Kunming currently flawed，and these indicators can not be treated all the standards. Some pretreatment facilities of catering units should based on the test results improving and strengthen management.

Abstract: Backwashing time is one of the most critical operational parameters for biological filter. In order to investigate the effect of backwashing time on iron, manganese, ammonia and turbidity removal, three backwashing time (5 min, 4 min and 3 min) were adopted. Results showed that the average concentration of total iron, manganese and ammonia in effluent was 0.025 mg/L, 0.007 mg/L, and 0.022 mg/L; 0.012 mg/L, 0.001 mg/L and 0.017 mg/L; 0.013 mg/L, 0.000 mg/L and 0.016 mg/L, respectively, which illustrated varying backwashing time had little influence on the removal efficiency of them. The turbidity in effluent was 0.28 NTU, 0.38 NTU, 0.57 NTU, respectively. The shorter backwashing time, the higher turbidity in effluent. Turbidity was almost completely removed in 0~0.4m of the media. After backwashing, the turbidity in effluent was decreased to less than 1 NTU in 40 min, droped to less than 0.5 NTU in 90 min.

Abstract: Phenol waste gas was treated by biotickling filter. The results operated n a month showed that when phenol was between 50mg/m³ and 100 mg/m³, phenol removal efficiency was more than 94%. Phenol elimination capacity of the system was around 30mg/L h. The system had high resistance to shock loading. the phenol removal efficiency did not decreased with increasing influent loading rate when it was lower than 100mg.L^-1.h^-1. The gas to liquid ratio almost had no adverse effect on the phenol efficiency when the ratio was in range of 1.1 to 2.2m³/L. The removal loading rate increased with the increasing of recycling phenol concentration. When phenol concentration was lower than 1000mg/L, the biotrickling filter still run in high efficiency. The biofilm in first stage of filling materials removed 90% of influent phenol.

Abstract: The sewage diffusion is an environmental material for protecting marine environment. It plays an important role in port engineering. Its effect under deep water was carried out between different diffuser design parameters based on the hydraulic model test, and Cao Fei-dian port sewage marine disposal project was taken as an example. For South port project, jet angle was controlled to be 0 degree, and horizontal angle was controlled to be 0 degree. It not only can ensure that sewage fully diluted mixed, also can avoid the premature convergence and sewage lifting. It is feasible for selecting large angle nozzle under deep water and there are some technical bases have been provided for other sewage marine disposal project.

Abstract: The focus of the yangshuo town drainage system is the mixture of sewage and rainwater, land of construction wedging in the original pool, storm water canal silting. By adopting the ecological design of drainage, domestic wastewater is transported to the sewage purification plant, then discharged by allowance. Carrying rainwater to the pool by ditches and pool water to the conduit of the town, Melting the drainage of rainwater and accumulation of pool water resource and enjoying landscape ecological function, actualizing being ecological cycle, it is a practicable designing.

Abstract: This essay introduces the structure and design of deep well AA/OO new process and advantages in treatment of coking wastewater, rational utilization of waste shafts properly give full play to improve AA/OO process for treating coking wastewater, greatly reducing the investment of infrastructure and construction. Combining the advantages of the AA / OO and deep aeration process can enhance the force of shock load and improve the high concentration of the wastewater treatment efficiency. Simultaneously, this patented technology is influenced less by temperature, widely suitable to many areas and produces little odor, cover less area. The proposed system was demonstrated to be an attractive biological nutrient removal process for the treatment of coking wastewater.

Abstract: Fly ash is a coal-fired waste from the coal-consumed power plant. It has become a great concern as to how fly ash should be treated properly at home. At present, the comprehensive utilization ratio of fly ash is just 30% and utilization ratio of fly ash from coal gangue power plant is less than coal-fired power plant. The effect of different fly ash added to the high-water filling material on the filling result was analyzed and field test of filling in mined-out area was conducted in the Babao vertical shaft + 3211 section of Tonghua coal mining group. The result shows that fly ash of gangue power plant added into the high-water packing material can lower the filling material cost effectively. This research can lead to push forward the utilization of fly ash with high efficiency.