<![CDATA[Laboratory generates waste such as wastewater from various activities in laboratory. This research aims to analyze wastewater charateristic before and after treament and evaluate the efficiency of wastewater treatment in laboratory PT.X. Wastewater treatment in laboratory PT.X consist of equalization, neutralization, sedimentation and adsorpstion unit. Wastewater of laboratory PT.X has brown color, odourize and has high concentration of COD, ammonia and phenol. Average concentrations of wastewater before treatment were 2.63 for pH, 903 mg/L for COD, 67.73 mg/L for ammonia and 1.87 mg/L for phenol. Effluent concentration of wastewater in laboratory PT.X after treatment meets the standard of wastewater quality. The efficiency of wastewater treatment for each parameter were 62.75% for pH; 91.44% for COD, 96.31% for ammonia, and 87.58% for phenol]]>
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