Development of microalgae and agrobost mutualism symbiotic technology in the aerobic treatment of sago refinery wastewater

Abstract Sago wastewater is 94% of the water produced from sago processing that could pollute environment. One biological treatments to solve this problem use mutualism symbiotic between microalgae Chlorella sp. and agrobost with addition 5.000 lux constant light. The purpose research was develop technology for aerobic bacteria in decomposition liquid waste, particular optimizing photosynthesis process. Furthermore, reduction BOD, COD, organic content be fast effective. applied a Completely Randomized Design (CRD) five three replications. were 800 ml/l (7.595 log cell/ml) as much waste at variation concentrations (0% v/v,1% v/v, 2%v/v, 3% 4%v/v). Data statistically analyzed using Analysis Variance, followed by Duncan’s New Multiple Range Test (DNMRT) level 5%. result showed microorganisms significantly affected DO, pH wastewater. treatment selected results study P4 highest on day 7 BOD value 116.06 mg/l, COD 200.90 DO 6.62 8.90.