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| 1 | Fate of antibiotics and antibiotic resistance genes in a full-scale restaurant food waste treatment plant:Implications of the roles beyond heavy metals and mobile genetic elements显示文摘Is our food safe and free of the crisis of antibiotics and antibiotic resistance (AR)?And will the derived food waste (FW) impose AR risk to the environment after biological treatment? This study used restaurant FW leachates flowing through a 200 tons-waste/day biological treatment plant as a window to investigate the fate of antibiotics and antibiotic-resistance genes (ARGs) during the acceptance and treatment of FW.Sulfonamides (sulfamethazine,sulfamethoxazole) and quinolones (ciprofloxacin,enrofloxacin,ofloxacin) were detected during FW treatment,while tetracyclines,macrolides and chloramphenicols were not observable.ARGs encoding resistance to sulfonamides,tetracyclines and macrolides emerged in FW leachates.Material flow analysis illustrated that the total amount of antibiotics (except sulfamethazine) and ARGs were constant during FW treatment processes.Both the concentration and total amount of most antibiotics and ARGs fluctuated during treatment,physical processes (screening,centrifugation,solid-liquid and oil-water separation) did not decrease antibiotic or ARGs concentrations or total levels permanently;the affiliated wastewater treatment plant appeared to remove sulfonamides and most ARGs concentrations and total amount.Heavy metals Ni,Co and Cu were important for disseminating antibiotics concentrations and MGEs for distributing ARGs concentrations.Humic substances (fulvic acids,hydrophilic fractions),C-associated and N-associated contents were essential for the distribution of the total amounts of antibiotics and ARGs.Overall,this study implied that human food might not be free of antibiotics and ARGs,and FW was an underestimated AR pool with various determinants.Nonetheless,derived hazards of FW could be mitigated through biological treatment with well-planned daily operations. | Pinjing He Zhuofeng Yu Liming Shao Yizhou Zhou Fan Lü | 2019 | Journal of Environmental Sciences2019，31，11： | 7 |
| 2 | Biodiesel production from green seaweed Ulva fasciata catalyzed by novel waste catalysts from Pakistan Steel Industry显示文摘This research article is based on the biodiesel synthesis from the marine green macroalga Ulva fasciata, collected from the coast of Karachi, Pakistan using new and the most potential waste catalysts from Pakistan Steel Industry.The oil was extracted with n-hexane then it was analyzed by GC, TLC and by the examination of fuel properties.The metal analysis of catalysts was carried out by chemical tests and flame atomic absorption spectroscopy(FAAS). The thermal treatment of catalysts at 1500–1700 °C during various processes in steel manufacturing industry converted the metals to metal oxides. The presence of CaO, MgO and ZnO in these catalysts made them highly reactive for biodiesel synthesis. The basicity of waste industrial catalysts was calculated to know their basic strength. The transesterification of U. fasciata oil was performed by fast stirring using 9:1 molar ratio of methanol/oil in the presence of seven different waste industrial catalysts for 6 h at 80–100 °C. The solid catalysts were easily separated from product for re-use. In addition, the rate of reaction in the presence of these catalysts was found to be quite feasible. The waste brown dust from the steel converter gave the highest yield(88%) of biodiesel. The production of biodiesel was confirmed by TLC examination and fuel properties in comparison with the ASTM standards. | Abdul Majeed Khan Noureen Fatima Muhammad Shoukat Hussain Kousar Yasmeen | 2016 | Chinese Journal of Chemical Engineering2016，24，8： | 4 |
| 3 | Toward separation at source: Evolution of Municipal Solid Waste management in China显示文摘Municipal Solid Waste(MSW)management in China has been transitioning from a mixed collection and treatment system to a separated collection and treatment system.The continuous rise of MSW treatment capacity and the optimization of technology structure provided basic facility support for China to promote MSW separation at source.China preferred a four-type separation system.Regulated recycling should be enhanced to improve the efficiency and sustainability of recycling industry.As food waste is the main composition of MSW in China,20%-30%of the food waste diversion and land application could maximize the comprehensive environmental performance.Incineration is to be the pillar technology in MSW separated treatment system in China. | Jianguo Liu Shuyao Yu Yixuan Shang | 2020 | Frontiers of Environmental Science & Engineering2020，14，2： | 3 |
| 4 | Application of UASB Reactor in Leachate Treatment of Beijing Asuwei Waste Sanitary Landfill Site显示文摘The UASB reactor was used to reconstruct leachate treatment project of Beijing Asuwei Waste Sanitary Landfill Site,and the commissioning with the UASB reactor was executed.Water quality indicators were determined in the debugging process,and the results showed that the VFA content in the anaerobic tank was controlled within 600 mg/L,which indicated that the water quality did not have the acidified phenomenon.The COD removal efficiency was 50%approximately and NH_3-N concentration showed as light decline when operation stability in anaerobic system. | Du Wei Lu Xufei Zhang Qingxi Zhu Jiagen Wang Jin’an Zhang Weijun Wang Chengjun | 2017 | Meteorological and Environmental Research2017，8，1： | 1 |
| 5 | Recycling water glass from wet reclamation sewage of waste sodium silicate-bonded sand显示文摘Wet reclamation of waste sodium silicate-bonded sand produces much alkaline sewage and causes pollution. Recycling water glass from wet reclamation sewage of the waste sodium silicate-bonded sand can solve pollution issues and generate economic benefits. In this work, the wet reclamation sewage was filtered, and the filtrate was causticized with a quicklime powder to produce a lye. The effects of causticization temperature, causticization time, and the amount of quicklime powder on the causticization rate were studied. The lye was used to dissolve the silica in the filtration residue to prepare a sodium silicate solution. The effects of the mass of filtration residue, dissolution temperature, and dissolution time on sodium silicate modulus were studied. Finally, the recycled water glass was obtained by concentrating the sodium silicate solution, and the bonding strength of the recycled water glass was tested. The results showed that the causticization rate could be improved by increasing the amount of quicklime powder, causticization temperature, and causticization time, and the highest causticization rate was above 92%. Amorphous silica in the filtration residue dissolved in the lye. Increasing the amount of the filtration residue, dissolution temperature, and dissolution time could improve the sodium silicate modulus. The bonding strength of the recycled water glass was close to that of commercial water glass. The recycled water glass could be used as a substitute for the commercial water glass. | Li-chi Wang Wen-ming Jiang Xiao-long Gong Fu-chu Liu Zi-tian Fan | 2019 | China Foundry2019，16，3： | 1 |
| 6 | Test of membrane bioreactor for waste water treatment of a petrochemical complex显示文摘TestofmembranebioreactorforwastewatertreatmentofapetrochemicalcomplexFanYaobo,WangJusi,JiangZhaochunDepartmentofWaterPolu... | Fan Yao bo, Wang Ju si, Jiang Zhao chunDepartment of Water Pollution Control and Water Reuse, Research Center for Eco Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China | 1998 | Journal of Environmental Sciences1998，10，3： | 0 |
| 7 | Optimal Method for Production of Amorphous Cellulose with Increased Enzymatic Digestibility显示文摘In this paper,a simple and cheap method for producing of amorphous cellulose was studied by treating the initial cellulosic material(MCC and waste paper)with a cold solvent,such as aqueous solution of 7%NaOH/12%Urea,at the various ratios of the solvent to cellulose(v/w)(R).If was found that after treatment of cellulose materials with the solvent at R≥5,a completely amorphous cellulose(AC)is formed.Due to high digestibility,the AC with concentration of 50 g/L is converted to glucose almost completely for 48 h under the action of cellulolytic enzyme CTec-3 with a dose of 30 mg/g solid sample.Such sample can be used as an amorphous standard in the study of crystallinity degree and enzymatic hydrolysis of various types of cellulose and lignocellulose.It was found that enzymatic saccharification is most advantageous to carry out at elevated concentrations of AC,150 g/L.Due to high cost of MCC,it is preferable to use a cheap cellulose raw material,such as mixed waste paper(MWP),for the commercial production of AC and glucose.The resulting glucose can find application in biotechnology as a promising nutrient for various microorganisms. | Michael Ioelovich | 2019 | Organic Polymer Material Research2019，1，1： | 0 |
| 8 | Sulfamic acid functionalized slag for effective removal of organic dye and toxic metal from the aqueous samples显示文摘Surface functionalization of blast furnace slag with sulfamic acid(a zwitterion)was performed for the removal of Cr^(3+)and methylene blue dye(MB)from water samples.The slag functionalization process was optimized using Response Surface Methodology Design.Statistical analysis of the parameters that include the sulfamic acid amount(A),reaction time(B),and temperature(C)revealed that(A)increase had a negative effect on the adsorption of both pollutants by the zwitterion slag,whereas(B)and(C)increase presented a positive impact.At the optimum condition of 2 g sulfamic acid amount,50 min reaction time and 37℃ temperature,the prepared slag showed a removal efficiency of more than 90% for both Cr^(3+)and MB.Surface characterization by SEM/EDS,FTIR,XPS and surface area analyser,showed an improvement in surface properties and the incorporation of zwitterionic NH^(2+)and S=O groups of sulfamic acid.Adsorption isotherm and kinetic studies conducted with the zwitterion slag showed the adsorption process was suited to Freundlich isotherm model and pseudo-second-order kinetic model.The thermodynamic study conducted revealed the spontaneity of the process based on the calculated negativeΔG(Gibb’s free energy)values.The prepared zwitterion slag offered easy regeneration with dilute HCl solution and showed a considerable removal(Cr^(3+):65% and MB:80%)for both pollutants even after 3 cycles of usage. | Dauda Mohammed Muhammad HAl-Malack Basheer Chanbasha | 2021 | Chinese Journal of Chemical Engineering2021，34，5： | 0 |
| 9 | Water Quality Management of Beijing in China显示文摘At present, Beijing’s water resources are insufficient and will become the limiting factor for sustainable development for the city in the near future. Although efforts have been made to control pollution, water quality degradation has occurred in some of the important surface water supplies, aggravating the water resource shortage. At present, approximately three quarters of the city’s wastewater is discharged untreated into the urban river system, resulting in serious pollution and negatively influencing the urban landscape and quality of daily life. To counteract these measures, the city has implemented a comprehensive “Water Quality Management Plan” for the region, encompassing water pollution control, prevention of water body degradation, and improved water quality. The construction of municipal wastewater treatment plants is recognised as fundamental to controlling water pollution, and full secondary treatment is planned to be in place by the year 2015. Significant work is also required to expand the service area of the municipal sewage system and to upgrade and renovate the older sewer systems. The limitation on available water resources has also seen the emphasis shift to low water using industries and improved water conservation. Whilst industrial output has increased steadily over the past 1015 years at around 10% per annum, industrial water usage has remained relatively constant. Part of the city’s water quality management plan has been to introduce a strict discharge permit system, encouraging many industries to install on site treatment facilities. | Andy PittEntec UK Ltd, Northumbria House, Manor Walks, Cramlington, Northumberland, NE23 6UP, UK | 2000 | Tsinghua Science and Technology2000，5，3： | 0 |
| 10 | ARSENIC REMOVAL BY SULFIDATION SEDIMENTATION IN MAGNETIC FIELD显示文摘1INTRODUCTIONAsthewatersourcecrisisisbecomingmoreandmoresevereandtheenvironmentprotectionrequirementsarebecomingmoreandmoreri... | Ma, Wei Ma, Wenji Ma, Rongjun Shen, Dianbang | 1998 | 中国有色金属学会会刊:英文版1998，8，3： | 0 |
| 11 | Optimization of hydrothermal pretreatment for co-utilization of xylose and glucose of cassava anaerobic residue for producing ethanol显示文摘The development of a process that could recover biofuel from industrial cellulose waste can not only reduce the negative environmental impacts by using fossil fuels, but also bring a green idea for the waste’s disposing. In this study, hydrothermal pretreatment was optimized for cassava anaerobic residue, a cellulosic waste from cassava ethanol industry, to co-utilize xylose and glucose for producing bioethanol. The effect of the main pretreatment conditions, namely, temperature, solid content and time, was explored for the highest recovery of xylose in prehydrolysate and glucose in enzymatic hydrolysate. The single factor experiment results showed that the conditions for maximum xylose recovery in prehydrolysate and glucose recovery in enzymatic hydrolysate were 60℃, 75 min, 10% solids and 160℃, 75 min, 10% solids, respectively. Whereafter, response surface methodology(RSM) was applied to further optimize the pretreatment conditions for the maximum theoretical ethanol production through utilizing both xylose and glucose. A treatment at 163℃, for 59 min and with 9.5%solids was found optimal, with the highest ethanol production of 20.2 mg·g^-1 raw material. Furthermore, in order to assess the impacts of the pretreatment on cassava anaerobic residue, the changes in crystallinity and morphology for untreated and pretreated solids were investigated. | Huisheng Lü Jinyi Zhou Jiatao Liu Chunliu Lü Feng Lian Yonghui Li | 2019 | Chinese Journal of Chemical Engineering2019，27，4： | 0 |
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