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Title: Optimized Technology for Muncipalwaste Water Treatment and Reuse for Agriculture
Authors: Mehrdadi, Nasser 
Hooshyari, Behnam 
Issue Date: 2007
Publisher: University of the Thai Chamber of Commerce
Source: Nasser Mehrdadi, Behnam Hooshyari (2007) Optimized Technology for Muncipalwaste Water Treatment and Reuse for Agriculture.
Conference: Proceedings of the 2nd International Conference on Operations and Supply Chain Management 
Abstract: Wastewater reuse has been growing over the threedecades and is now considered an essential managementstrategy. Many countries now consider wastewater reuseas a method to secure water resources .Reclaimingwastewater for agricultural reuse in increasinglyrecognized as an essential strategy in areas of the worldwhere is in short supply .Wastewater reuse has two majorobjectives :it improves the environment because it reducesthe amount of waste (treated or untreated) discharged intowater courses, and it conserves water resources bylowering the demand for freshwater abstraction .In theprocess, reuse has the potential to reduce the cost of bothwastewater disposal and the provision of irrigation water,mainly around towns with sewers .The benefits ofreclaimed wastewater for irrigation are: increasing cropyields ; soil conservation and potential reduction ofdesertification ; improving of the environment byenabling zero-discharge to receiving bodies ; decreasingthe use of fertilizers while providing increases and organicmatter for soil conditioning ; and enabling the reallocationof freshwater supplies for urban use. Wastewater projectsthat rely on natural process to drive or power the systemcan attain high levels of sanitary control for the relativelylow initial capital outputs. Several conventional treatmenttechnologies would be considered a naturally basedtechnology because treatment occurs biologically. Thetreatment technology should achieve three importantgoals: 1) to reduce the pathogenic risk inherent towastewater. 2) To facilitate the recovery of nutrient, andwater resources for reuse in agricultural production, theirrigation of municipal greenbelts/parks and maintenanceof other landscape amenities. 3) To reduce the overalluser-demand for water resource. With the aboveconsideration, the pilot plant set up of H-IFAS (HybridIntegrated Fixed Activated Sludge) reactor was fabricatedaccordingly with the capacity of (300L) anaerobic zone,(850L) aerobic zone and with two anoxic zone (850L) aswell as clarifier to treat domestic wastewater fromEkbatan wastewater treatment plant in south-west ofTehran. The raw wastewater was fed to an elevatedstorage tank by a centrifuge pump from the grit chamberdownstream and fed to the reactor in an up flowcontinuous manner. In order to control the content ofmedia in each zone some stainless-steel meshes wereinstalled between these parts. The aerobic and anoxiczones were separated with an impermeable metallic wall.In this paper, the efficacy of this technology for effluentreuse for agricultural uses will be presented.
Rights: This work is protected by copyright. Reproduction or distribution of the work in any format is prohibited without written permission of the copyright owner.
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