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94 results for “quality standards”
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Research ArticleOpen accessIn the abstractGradient Descent Learning for Utility Current Compensation using Active Regenerative PWM FilterR. Balamurugan, G. GurusamyProblem statement: Harmonic analysis is a primary matter of power quality assessment. Its main intention is to check the utility whether it is delivering the loads without any deviations in voltages and currents. The problem is due to proliferation of Electronic converters and power electronics which gave birth to numerous new applications, offering unmatched comfort to the customers. Approach: Harmonics … …Journal of Computer Science, Vol. 7, Issue 12 · 14 Oct 2011 · 6,551 accessesView PDFCite
Research ArticleOpen accessIn the abstractPhysicochemical and Microbial Caracteristics Performency in Wastewater Treated Under Aerobic ReactorAsma Ben Rajeb, Hamadi Kallali, Neila Saidi et al.Problem statement: The current work study the efficiency of biological wastewater treatment by an aerobic reactor which could be used in small agglomerations. RBC reduced physicochemical and microbiological load of wastewater but values remain above Tunisian standard. Approach: Experiments were conducted on a sand filled PVC column fed with wastewater treated by Rotating Biological Contactor (RBC) at a pulsed rhythm … …American Journal of Environmental Sciences, Vol. 7, Issue 3 · 11 Jul 2011 · 6,681 accessesView PDFCite
Research ArticleOpen accessIn the abstractOptimizing Coagulation Process for Low to High Turbidity Waters Using Aluminum and Iron SaltsAkbar Baghvand, Ali Daryabeigi Zand, Nasser Mehrdadi, Abdolreza KarbassiProblem statement: Turbid waters, containing colloidal particles, are normally treated by coagulation-flocculation followed by clarification. Ferric chloride and alum, which are the most common types of coagulants in water treatment plants of Iran as well as many other countries, were investigated with the aim of determining their capabilities to reduce turbidity of drinking water. Turbidity was added as kaolin. Optimization … …American Journal of Environmental Sciences, Vol. 6, Issue 5 · 31 Oct 2010 · 21,088 accessesView PDFCite
Research ArticleOpen accessIn the abstractA New Collaborative Pattern between Landscape Architects and Urban Designers in Environmental DesignMostafa Behzadfar, Mohsen Faizi, Sina Razzaghi Asl, Behzad Haji BeiklouProblem statement: Nowadays professions such as architecture, landscape architecture and urban design are playing a unique role in environmental design process. Meanwhile architecture is being separated from two other majors: landscape architecture and urban design by paying so much attention to constructing buildings. Landscape architecture and urban design have parallel subjects and goals and both have the intention to improve … …American Journal of Environmental Sciences, Vol. 6, Issue 4 · 31 Aug 2010 · 7,355 accessesView PDFCite
Research ArticleOpen accessIn the abstractImproving Jordan's Law towards Sustainable Solid and Hazardous Waste Management: Lessons from USA's Environmental LawsNaill M. MomaniProblem statement: Improper handling of solid and hazardous waste will impact the living standards of a community in normal days and when disasters occur such misuse could disperse response and recovery activities due to natural or man-made disasters. Approach: This study discussed the Jordanian solid and hazardous waste management policies in light of USA equivalent ones with the intention to … …American Journal of Environmental Sciences, Vol. 6, Issue 4 · 31 Aug 2010 · 6,614 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Street Vendors of Bangkok: Alternatives to Indoor Retailers at a Time of Economic CrisisJohn WalshProblem statement: During an economic crisis, consumers will use different techniques to make their money go as far as possible: More carefully comparing prices at point of sale locations, bringing out the coins they previously left unused in saving banks, switching to lower cost options and choosing to shop in less convenient locations in order to find discounts. One such … …American Journal of Economics and Business Administration, Vol. 2, Issue 2 · 30 Jun 2010 · 8,839 accessesView PDFCite
Research ArticleOpen accessIn the abstractStudying the Effects of Non-Tariff Barriers on the Export of the Main Agricultural Products of IranZ. Ardakani, S. Yazdani, O. GilanpourProblem statement: As trade agreements decrease tariffs throughout the world, other barriers to trade emerge. These Non-Tariff Barriers (NTBs) can be just as troublesome as tariffs for exporting countries. NTBs include any of a number of hindrances that restrict the ability of companies to export. NTBs may now have a greater impact on trade than tariffs. Approach: In contrast with … …American Journal of Applied Sciences, Vol. 6, Issue 7 · 31 Jul 2009 · 7,745 accessesView PDFCite
Research ArticleOpen accessIn the abstractPresence and Origin of Fluoride in the Complex Terminal Water of Ouargla Basin (Northern Sahara of Algeria)Imed Eddine Nezli, Samia Achour, Mohamed Djidel, Saïd AttalahProblem statement: The underground waters in the oriental regions of the Algerian Sahara, present real chemical quality problems. Their content in fluorides always exceeds the limit of the recommended levels. That is 0.8 mg L-1, according to the maximum temperature in the region. Combined to a high salinity, it affects the health of the population living around the region. The … …American Journal of Applied Sciences, Vol. 6, Issue 5 · 31 May 2009 · 7,677 accessesView PDFCite
Research ArticleOpen accessIn the abstractReview on Landfill Leachate TreatmentsAbdulhussain A. Abbas, Guo Jingsong, Liu Zhi Ping et al.Problem Statement: Sanitary landfilling is the most common way to eliminate solid urban wastes. An important problem associated to landfills is the production of leachates. This study is a review of landfill leachate treatments. Approach: The advantages and disadvantages of the various existing leachate treatments discussed under the items: (i) Leachate channeling (combined treatment with domestic sewage, recycling) (ii) Biological … …American Journal of Applied Sciences, Vol. 6, Issue 4 · 30 Apr 2009 · 13,764 accessesView PDFCite
Research ArticleOpen accessIn the abstractAlteration of the Aquifer Water in Hyperarid Climate, by Wastewater: Cases of Groundwater from Ouargla (Northern Sahara, Algeria)Djidel Mohamed, Bousnoubra-Kherici Houria, Kherici Nacer, Nezli Imed-EddineThe present study is registered, on the area of Ouargla (the Sahara septentrional, Algeria) reports of the aquifer contamination by the anarchistic urban rejections. By its geomorphology (basin), its hyperarid climate and the presence of chotts, the area is subjected to an important degree of vulnerability, encouraged by the discharges of wastewater (domestic and irrigation). These factors expose aquifer's water … …American Journal of Environmental Sciences, Vol. 4, Issue 6 · 31 Dec 2008 · 7,111 accessesView PDFCite