Muhammad Al Kholif, Joko Sutrinno, Indah Nurhayati, Retno Setianingrum
Laboratory waste can have a large impact on the environment if it is not processed before being discharged into the water body. Laboratory waste treatment can be carried out using suspended growth technology to reduce pollutant loads, especially BODs and COD. This study aims to treat waste produced by the environment of laboratory using suspended growth technology. This research was conducted by finding the most efficient rotor rotation in degrading the load of BODs and COD pollutants. Methodology and results: The reactor used is a Mixed Flow Reactor type reactor made of acrylic material with a thickness of 5.5 mm. The reactor is arranged into three series with the same sampling time and different rotor turns that expressed in rotors per minute (rpm). The reactor consists of Reactor I with 50 rpm rotor rotation speed, lũũ rpm Reactor II and 150 rpm Reactor III. Processing is carried out using 8 hours of residence time and variation of sampling time every 8 hours. From the results of the study obtained the highest level of effectiveness of reducing pollutant load on processing using 150 rpm rotor rotation and 40 hours sampling time which is 94.6% for BODs parameters and 94.4% for COD parameters. Conclusion, significance and impact study: Rotor rotation has a great impact in treating laboratory wastewater, this is evidenced by the large removal efficiency of BOD5 and COD levels which reached more than 90%. © 2021, Trisakti University. All rights reserved.
Study Program of Environmental Engineering, Faculty of Engineering, Universitas PGRI Adi Buana Surabaya, Surabaya, 60234, Indonesia
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