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The wet market wastewater may lead to pollution, odour and aesthetic problems to theenvironment and society if not treating properly. Thus, this research was conducted to culturemicroalgae Scenedesmus sp. and to identify the optimal concentration of microalgae Scenedesmussp. due to the nutrient and heavy metal removals from wet market wastewater based on laboratoryscale. The samples were taken from Public Market Parit Raja, Batu Pahat at 9a.m. in the morning asa peak hour operating stall using grab sampling technique. The characteristics of raw wastewaterand microalgae Scenedesmus sp. were determined. There are five sample wastewater (used 625mlfor each five sample wastewater) with five different samples concentration of microalgae which are6.50x105, 49.88x104, 34.75x104, 19.63x104 and 49.88x104 cell/ml with 16 days as duration forperiod study. The microalgae were cultured by BBM for eight days and another eight days fortreatment with replicates three times for each sample. The analysis were measured due to thenutrient and heavy metal removals which are TN, TP, TOC, Fe and Zn during eight days treatmentprocess. Based on experimental result, the optimum removal efficiency for each concentration wereachieved 45.6-86.4% of nutrients and heavy metals. The highest amount of nutrient and heavymetal removals after wastewater treatment by microalgae are TN 74.77%, TP 82.17%, TOC86.36%, Fe 65.76% and Zn 84.14%. As conclusion for this experiment, Sample 2 (concentration49.88x104 cell/ml of microalgae Scenedesmus sp.) is the optimum concentration due to the highestpercentage of nutrients and heavy metals removal which achieved 65.3-82.1% which TN 65.32%,TP 76.77%, TOC 80.34%, Fe 65.76% and Zn 82.12%

Removal of Nutrients and Selected Heavy Metals in Wet Market Wastewater by Using Microalgae <i>Scenedesmus </i>Sp.