Paper Information

Journal:   JOURNAL OF AQUACULTURE DEVELOPMENT   WINTER 2018 , Volume 11 , Number 4 #B0043; Page(s) 13 To 27.
 
Paper: 

UTILIZING CONTINUOUS CULTURE SYSTEM OF MICROALGAE (SCENEDESMUS OBLIQUUS) FOR IMPLIED BIOLOGICAL TREATMENT OF MUNICIPAL WASTEWATER

 
 
Author(s):  PIRBEIGI A.*, HOSSEINI S.A., GHORBANI R., REZAEI H., VINCE O.
 
* DEPARTMENT OF FISHERY, FACULTY OF FISHERIES AND ENVIRONMENT, GORGAN UNIVERSITY OF AGRICULTURAL SCIENCE AND NATURAL RESOURCES, GORGAN, IRAN
 
Abstract: 

In the current study nutrient removal capability from municipal sewage by microalgae Scenedesmus obliquusand 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±1oC 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.

 
Keyword(s): MUNICIPAL WASTEWATER, TREATMENT, CONTINUOUS SYSTEM, SCENEDESMUS OBLIQUUS, PHOSPHATE-NITRATE
 
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