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Dong Y.-B.,University of Science and Technology Beijing | Dong Y.-B.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | Lin H.,University of Science and Technology Beijing | Lin H.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | And 2 more authors.
Gongcheng Kexue Xuebao/Chinese Journal of Engineering | Year: 2016

In order to study the ability of lees to adsorb heavy metals, this article was focused on the effects of wastewater pH values, Pb2+ and Zn2+ mass concentrations, and adsorption time on the adsorption quantity of Pb2+ and Zn2+ from simulated acid mine drainage using lees. Test results show that the maximum removal rate appears when the pH value is 4. The adsorption of Pb2+ by lees accords with the Langmuir equation, but the adsorption of Zn2+ is followed by the Freundlich equation. Under the optimal conditions, the maximum adsorption capacity of Pb2+ and Zn2+ by lees is 8.29 mg·g-1 and 15.31 mg·g-1, respectively. The adsorption process reaches equilibrium after 4 h, in agreement with the second-order kinetics model. The contents of cellulose, hemicelluloses and lignine in the lees is 23.3%, 65.5% and 0.5%, while become 19.6%, 42.3% and 2.6% after adsorption of Pb2+ and Zn2+, respectively. The electro-negativity of lees increases while the pH value raises, and it reduces after adsorption of Pb2+ and Zn2+. Fourier transform infrared spectra indicate that the main functional groups are amide and ester reacting in the adsorption process. © All right reserved.


Bai X.,University of Science and Technology Beijing | Bai X.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | Li Z.,University of Science and Technology Beijing | Li Z.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2015

Stripping combined with struvite precipitation (MAP) was used to treat the liquid digestate. The results showed that the best process parameters for stripping of the digestate from mesophilic digestion were as follows: the pH value was 10, stripping time was 8 h, gas-liquid ratio was 2 400, and filler was added. The removal rate of ammonia in the digestate was about 90%. The pH value of the digestate after stripping was about 9.2 and it was suitable for MAP precipitation method. The pH value regulation was not necessary, so it can save the cost of dosage. The removal rate of ammonia nitrogen and total phosphorus were 95% and 80%, respectively, after MAP precipitation treatment. The removal rates of COD and SS were 40% and 32%, respectively. The pH value of the effluent after MAP precipitation was about 8.3, which can meet the requirements of biochemical treatment. Meanwhile, C/N ratio of the effluent was greatly improved, which was increased from 0.7 to 10, and it was conducive to further treatment of the follow-up biochemical system. The process not only makes the digestate be processed, but also can recover the nutrients. © 2015, Chinese Society of Agricultural Machinery. All right reserved.


Zhang Y.,University of Science and Technology Beijing | Tang X.,University of Science and Technology Beijing | Tang X.,Beijing Key Laboratory of Resource Oriented Treatment of Industrial Pollutants | Yi H.,University of Science and Technology Beijing | And 7 more authors.
RSC Advances | Year: 2016

Abatement of NOx through non-thermal plasma (NTP) processes has been developed over the past several years. Since discharge plasma contains a large amount of highly active species during the reaction process, NOx is removed during our desired conversion reaction, as well as production of other byproducts, such as O3 and N2O. The effect of reaction conditions, such as oxygen content, discharge power, operation time, initial NO concentration and gas residence time, on generation characteristics of O3 and N2O was investigated. Results showed that, with increasing oxygen concentration and discharge power, the production of N2O and O3 increases. Additionally, O3 concentration decreases with increasing operation time; the higher input power, the higher the temperature increases, causing a greater reduction rate of O3, which also leads to a reduction of NO2 production. NO concentration and gas residence time also exert effects on the generation of byproducts. © 2016 The Royal Society of Chemistry.


Su W.,University of Science and Technology Beijing | Su W.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | Yu M.,University of Science and Technology Beijing | Yu M.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | And 6 more authors.
International Journal of Green Energy | Year: 2015

Ethanol fermentation from food waste could reduce the solid waste pollution and realize energy utilization. In order to decrease distillation waste, the recycle of such waste was adopted in ethanol fermentation. It demonstrated that such treatment could only last for four times due to the existence of side products. The distillation waste would gradually reduce ethanol concentration and sugar utilization ratio, lactic acid would be accumulated to 8 g/L, and salinity would be accumulated to 10 g/L, pH decreased to less than 3.5. Three-dimensional fluorescence analysis showed protein-type substances, microbial metabolism type substances, and humic substances were accumulated during the recycling. In order to resolve such problems, addition of protease was chosen in this research. The recycling time could enhance to seven times and the highest ethanol concentration was 35 g/L, the lowest ethanol concentration was 20 g/L. The recycling of distillation waste could save water resource, reduce wastewater discharges with high COD lees and reduce the cost. Which provided a new way for the clean production of bioethanol production from food waste. © 2015 Taylor & Francis Group, LLC.


Ma H.,University of Science and Technology Beijing | Ma H.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | Yang J.,University of Science and Technology Beijing | Yang J.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | And 7 more authors.
Bioresource Technology | Year: 2016

Stillage reflux fermentation in food waste ethanol fermentation could reduce sewage discharge but exert a harmful effect because of side-product accumulation. In this study, regulation methods based on metabolic regulation and side-product alleviation were conducted. Result demonstrated that controlling the proper oxidation-reduction potential value (-150 mV to -250 mV) could reduce the harmful effect, improve ethanol yield by 21%, and reduce fermentation time by 20%. The methods of adding calcium carbonate to adjust the accumulated lactic acid showed that ethanol yield increased by 17.3%, and fermentation time decreased by 20%. The accumulated glyceal also shows that these two methods can reduce the harmful effect. Fermentation time lasted for seven times without effect, and metabolic regulation had a better effect than side-product regulation. © 2016 Elsevier Ltd.


Shi Y.-L.,University of Science and Technology Beijing | Shi Y.-L.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | Tong Z.-S.,University of Science and Technology Beijing | Tong Z.-S.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | And 2 more authors.
Kang T'ieh/Iron and Steel | Year: 2015

In order to find active reaction zone of dense flow absorber and the reason that why the distal end of bag-filter was not highly used, it was urgent to study the internal flow field distuibution and the change of pressure field. In this paper, the system of a dense flow absorber integrated bag-filter was simulated with Fluent software before and after improvement. The two-equation turbulence model and discrete phase model(DPM) were used to simulate the gas phase flow and solid phase flow, respectively. Results of the simulation showed that changing the layout of outlets had much more positive effects on the homogeneous flow inside bag-filter than adding the baffle plate inside bag-filter. The empirical study also indicated that the most optimized design of the baffle plate inside the dense flow absorber was 7.5 m in length and 45 degree in angle. © 2015, Chinese Society for Metals. All right reserved.


Ma H.,University of Science and Technology Beijing | Ma H.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | Bonnie N.A.,University of Science and Technology Beijing | Bonnie N.A.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | And 6 more authors.
Journal of Water Reuse and Desalination | Year: 2016

Absolute reduction of perchlorate has proven complex owing to the diverse characteristics of the perchlorate ion. Technologies such as chemical reduction, ozone/peroxide, nanofiltration, and reverse osmosis have had limited success, high costs and are not environmentally friendly. Agreat deal of research and reviews on ion exchange and biodegradation have been carried out, but conditions for optimal biodegradation are not yet well understood. The acceptability of biological treatment of perchlorate has been limited due to challenges such as electron donor availability, which impacts on the environmental sustainability of perchlorate biodegradation, the biomass inventory, secondary contamination of treated water due to contact withmicro-organisms between the treatment unit and the final effluent, and the presence of otherenergeticcompoundssuch asRoyalDemolition Explosives and2,4-dinitroanisole (DNAN) in army PAX 21 production water and other competing electron acceptors such as nitrate and sulfate. Therefore, the current researchconcern is about optimizationof thebiodegradationofperchlorate for largescale applicability. In addition to summarizing the strengths and weaknesses of developed and emerging perchlorate treatment technologies, this reviewfocuses on research developments in biological treatment ofammoniumperchlorate, perchlorate reducing bacteria, factors affecting biodegradation ofNH4 ClO4 - and previous research recommendations on efficient, effective, and stable biological treatment of perchloratecontaminated wastewater. © IWA Publishing 2016.


Ma H.,University of Science and Technology Beijing | Ma H.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | Yang J.,University of Science and Technology Beijing | Yang J.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | And 6 more authors.
Bioresource Technology | Year: 2016

Raw materials and pollution control are key issues for the ethanol fermentation industry. To address these concerns, food waste was selected as fermentation substrate, and stillage reflux was carried out in this study. Reflux was used seven times during fermentation. Corresponding ethanol and reducing sugar were detected. Accumulation of by-products, such as organic acid, sodium chloride, and glycerol, was investigated. Lactic acid was observed to accumulate up to 120 g/L, and sodium chloride reached 0.14 mol/L. Other by-products did not accumulate. The first five cycles of reflux increased ethanol concentration, which prolonged fermentation time. Further increases in reflux time negatively influenced ethanol fermentation. Single-factor analysis with lactic acid and sodium chloride demonstrated that both factors affected ethanol fermentation, but lactic acid induced more effects. © 2016 Elsevier Ltd.


Du K.,University of Science and Technology Beijing | Du K.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | Liu J.,University of Science and Technology Beijing | Zhou B.,University of Science and Technology Beijing | And 3 more authors.
Environmental Engineering Research | Year: 2016

2-Methylisoborneol (2-MIB) is one of typical odorants in potable water sources, which is hardly removed by conventional water treatment process. In this study, three strains capable of removing 2-MIB singly from drinking water were isolated from activated carbon of sand filter. They were identified to be Shinella zoogloeoides, Bacillus idriensis and Chitinophagaceae bacterium based on 16S rRNA gene sequence analysis. In mineral salts medium without external carbon source, removal efficiencies of 20 μg/L 2-MIB in three days were 23.3%, 32.9% and 17.0% for Shinella zoogloeoides, Bacillus idriensis and Chitinophagaceae bacterium, respectively. The biodegradation of 2-MIB was significantly improved with the presence of cometabolism carbon(glycerol, glucose, etc.). In the period of 20 days, Bacillus idriensis can remove 2 mg/L MIB to 368.2 μg/L and 315.4 μg/L in mineral salts medium without and with glycerol respectively. The removal of 2-MIB by Bacillus idriensis was from 2 mg/L to 958.4 μg/L in Xiba river samples on 15 days. © 2016 Korean Society of Environmental Engineers.


Zhao S.,University of Science and Technology Beijing | Yi H.,University of Science and Technology Beijing | Yi H.,Beijing Key Laboratory of Resource oriented Treatment of Industrial Pollutants | Tang X.,University of Science and Technology Beijing | And 9 more authors.
Ultrasonics Sonochemistry | Year: 2016

Ultrasonic effect in the synthesis of catalysts of NiAl oxides prepared starting from the coprecipitation method of a hydrotalcite structure was evaluated in this work. Removal of carbonyl sulfide (COS) at low temperature over the hydrotalcite-derived oxides was studied. The samples were characterized by X-ray Diffraction (XRD), scanning electron microscope (SEM), N2 adsorption/desorption techniques, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and CO2 temperature-programmed desorption (TPD). It is found that hydrotalcite treated with ultrasonic has smaller average crystallite size and higher particle dispersion compared to hydrotalcite without ultrasonic treatment. As a result, mixed oxides derived from hydrotalcite treated with ultrasonic show more developed pore structure which is good for the physical adsorption of gaseous pollutant. The result of desulfuration test showed that removal efficiency of COS on the NiAl mixed oxides prepared by ultrasonic method (30 min) is greater than that on the catalyst prepared without the ultrasonic irradiation assistance with the same aging time. One important reason for the high activity is that when the ultrasonic is used the number of weak basic sites (OH- groups) and moderate basic sites (M-O) was increased, whereas the number of strong basic sites (O2-) was decreased. Therefore, ultrasonic treatment promoted the COS hydrolysis and suppress the poisoning of the catalyst. © 2016 Elsevier B.V. All rights reserved.

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