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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of Applied Research in Water and Wastewater
- نوع مقاله: Journal Article
- کلمات کلیدی: Waste Management,Sustainable Development,SWOT,QSPM,strategic management
- چکیده:
- چکیده انگلیسی: Sustainable development highly depends on how we manage various parts of the industry, and it plays a significant role in the sewage purge system to pay attention to the clutch reducer elements. Complementary procedures and technologies are needed to resolve water governance concerns, urging a rapid alteration of the economics, engineering, and administration agendas to determine our generation's water challenges. Ekbatan Wastewater Treatment Plant (EWTP) confronts several problems that necessitate comprehensive and strategic planning and management. An analysis of strength-weakness-opportunity-threat (SWOT) and quantitative strategic planning matrix (QSPM) methods were used to investigate strategic factors. For scoring the proposed strategies, a group of experts who are familiar with environmental management was selected. Environmental factors were recognized and investigated. According to experts' opinions, important and unimportant factors were identified and prioritized. The most effective strategy to further strengthen the current situation is "expanding the treatment plant activities such as internal infrastructure and urban utilities to manage more waste."
- انتشار مقاله: 07-05-1399
- نویسندگان: Mohammad Ali Zahed,Aeen Eftekhari,Hassan Hoveidi,Faranak Hejabi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Applied Research in Water and Wastewater
- نوع مقاله: Journal Article
- کلمات کلیدی: Electrochemical oxidation,COD,Color removals,Landfill leachate,Aluminum electrodes
- چکیده:
- چکیده انگلیسی: Electrochemical oxidation process has been shown to be a favourable choice for Chemical oxygen demand (COD) and color removals from various types of wastewaters. The technique was employed for mineralization of semi-aerobic landfill leachate. Leachate sampling were carried out from Pulau Burung Landfill Site (PBLS), Penang, Malaysia. The main objective was to determine the effectiveness of electrochemical oxidation in leachate treatment using aluminum electrodes which are relatively nontoxic and cost-effective. The influence of pH, reaction time, current density, electrolyte concentration, agitation rate and dilution on COD and color removals was investigated. The highest COD and color removal were obtained as 57.1% and 72.0% respectively at pH 8, current density 60 mA/cm2, electrolyte concentration 2000 mg/L, agitation rate 400 rpm, dilution 50% and reaction time 4 h. The energy consumption was determined as 128 kWh/m3 for this type of landfill leachate. The study shows that electrochemical oxidation can be used as a step of shared treatment.
- انتشار مقاله: 08-08-1397
- نویسندگان: Soraya Mohajeri,Hamidi Abdul Aziz,Mohamed Hasnain Isa,Mohammad Ali Zahed
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Applied Research in Water and Wastewater
- نوع مقاله: Journal Article
- کلمات کلیدی: MTBE,Groundwater,Fenton,Benzene,Stabilized Nano Zero-valent Iron
- چکیده:
- چکیده انگلیسی: A bench-scale study was designed for removal of Methyl Tertio Butyl Ether (MTBE) and benzene from south of Tehran groundwater. The experiments were implemented on a one-dimensional soil column with similar chemical and physical conditions of the region. Fenton’s chemical oxidation with stabilized nano zero-valent iron particles (S-NZVI) as catalyst was used. For treatment of groundwater polluted with 2 mg L-1 MTBE and 1 mg L-1 benzene, optimum concentrations of H2O2 and S-NZVI were 1500 and 300 mg L-1, respectively. The optimum concentrations led to 78 % elimination of MTBE and 87 % of benzene. Hazardous by-products (acetone and tertio-butyl alcohol) concentrations were less than 0.1 mg L-1, which were considered to be negligible. The soil permeability was reduced to 30 % after removal process. To increase the system efficiency and reduce the consumption of iron, the reaction environment was acidified down to pH = 3.2 led to removal efficiency of 90 % and 96 % for MTBE and benzene, respectively. The scavengers (ions) reduced the system efficiency up to 15 %. This study indicates that theoretically the MTBE and benzene could be removed from groundwater using Fenton’s chemical oxidation with S-NZVI.
- انتشار مقاله: 08-06-1396
- نویسندگان: Ali Beryani,Alireza Pardakhti,Mojtaba Ardestani,Mohammad Ali Zahed
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Applied Research in Water and Wastewater
- نوع مقاله: Journal Article
- کلمات کلیدی: partnership model,Ratio – trade system Ant Colony Optimization Theory of cooperative game
- چکیده:
- چکیده انگلیسی: One of the main problems in the quality control of rivers is the high control cost imposed upon pollutant units. The cooperative policy approach in the treatment process between two or more pollutant units is a new and economic perspective in the environmental management of catchment basins. Origins of large amounts pollutants which require a high cost to control pollution are trying to start partnerships with smaller units in establishing joint refineries in order to reduce their own and the whole system's costs. In this study, considering the one way direction of the river's water, the Streeter – Phelps equations were used to simulate the river. The Ant Colony Optimization was used as an efficiency model in order to acquire the best scenario of cooperation based on the maximum elimination of pollution and reduction of treatment costs without straying from the river's quality standards. Also the ratio – trade system was used for commercial purposes. After this the cost of the depleting units was split evenly between them using the cooperative game theory. The efficiency of the model was evaluated by qualitative and quantitative analysis of the Zarjub River in Gilan province of Iran. Three main scenarios were taken to mind for cooperative trading to take place. Carrying out the trade – partnership model could play positively large role in sufficing the quality the control of river water.
- انتشار مقاله: 25-11-1392
- نویسندگان: Seyed Masoud Tayefeh Cheraghali,Amin Sarang,Mohammad Ali Zahed,Hossein Vahidi,Moazameh Akbari
- مشاهده
- جایگاه : پژوهشی
- مجله: Environmental Energy and Economic Research
- نوع مقاله: Journal Article
- کلمات کلیدی: risk assessment,Oil storage tanks,FTA,ETBA,Loss causation model
- چکیده:
- چکیده انگلیسی: The purpose of this research was to introduce and describe a model for Fire Quantitative Risk Assessment of in petroleum Storage Tanks. A novel model was designed to determine the risk of a fire occurrence using of Loss Causation and Swiss cheese models. Then, based on FTA, model and its integration with our initial proposed model, the final model was obtained for fire hazard determination in hydrocarbon tanks. The risk level of the hazard was identified using the energy trace and barrier analysis (ETBA). The quantitative fire risk assessment in the tank were carried out in accordance to the International Association of Oil & Gas Producers (IOGP) guideline. Base on the results, 22 risks were identified which 4 of them were unacceptable risks and corrective action was proposed for them. This method is commonly used in conjunction with the safety analysis of the system. This technique was the final part of this research.
- انتشار مقاله: 04-01-1398
- نویسندگان: Mohsen Saeidi Keshavarz,Fatemeh Razavian,Soroush Namjoufar,Mohammad Ali Zahed
- مشاهده
- جایگاه : پژوهشی
- مجله: Environmental Energy and Economic Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Crude Oil,Biodegradation,Degradation,Marine environment,Oil spill,Petroleum Hydrocarbons
- چکیده:
- چکیده انگلیسی: The effectiveness of hydrocarbon bioremediation strategies approaches is depending on various issues such as type and volume of pollution, nutrient accessibility in the target ecosystem, time, biodiversity of microorganisms, pollutant bioavailability and many others. In the present research, laboratory studies were carried out on the bioremediation of coastal sediment samples artificially contaminated with weathered crude oil. The efficiency of natural attenuation, bioaugmentation and biostimulation for removal of Total Petroleum hydrocarbons (TPH) were compared in 90 days experiments. Three oil concentrations of 3, 30, 60 g oil/kg soil were studied to investigate the effect of oil concentration on the bioremediation process. The average degradation, in biostimulation tests were 52.11, 58.36 and 43.02% whereas in bioaugmentation tests were 73.89, 73.76 and 58.31% for 3, 30 and 60 g oil respectively. The results indicated that excessive crude oil (more than 30 g/kg in this case) is not suitable for bioremediation presumably duo to inhibitory or toxicity to the microorganisms. By supplementation of acclimatized microorganism as well as nitrogen and phosphorus, a satisfactory amount of biodegradation is reachable in two months.
- انتشار مقاله: 09-03-1396
- نویسندگان: Leila Mohajeri,Mohammad Ali Zahed,Hamidi Abdul Aziz,Mohamed Hasnain Isa
- مشاهده