Utilizing Continuous Culture System of Microalgae )Scenedesmus obliquus( For Implied Biological Treatment of Municipal Wastewater
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Aref Pirbeigi * , Seyyed Abbas Hosseini , Rasul Ghorbani , Hassan Rezaei , Vince Ordog |
Gorgan University of Agricultural Sciences & Natural Resources |
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Abstract: (2608 Views) |
In the current study nutrient removal capability from municipal sewage by microalgae Scenedesmus obliquus and also the effects of used concentrations of sewage on algal growth, chlorophyll a content, BOD5, COD and pH of medium were investigated. For this reason, after culturing the algae Scenedesmus obliquus in a batch system and calculation of its specific growth rate, this species was cultivated in four concentrations (0, 25, 50 and 75%) of municipal sewage for 28 days in a continuous system. During the experiment, permanent lighting and a constant temperature of 24±1˚C were applied. All measurements except algae counting were done every two days. Based on the results, Specific growth rate in this study was calculated as 0.27 per day. PO4-P, NO3-N, NH4-N, COD and BOD5 values showed a significant decrease at the end of experiment. With increasing the concentration, chlorophyll a content and algal cells number showed a significant increase. Experimental results indicated that treatment with concentration of 75% had the best performance in phosphate and nitrate removal. It can be concluded that applied algae has a useful role in nutrient removal from wastewater using continuous system |
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Keywords: Municipal wastewater- Treatment- Continuous system- Scenedesmus obliquus- Phosphate- Nitrate |
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Full-Text [PDF 984 kb]
(2166 Downloads)
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Type of Study: Research |
Subject:
Special Received: 2016/11/15 | Accepted: 2017/05/1 | Published: 2017/11/27
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