REDUCTION OF POLLUTANTS IN CHEMICAL WASTEWATER USING A COMBINATION OF ELECTROCOAGULATION AND PNEUMATIC AGITATION
RR Dina Asrifah*, Aditya Pandu Wicaksono, Renung Reningtyas, Dewa Guritno, Ryhoma Sevin, Ghina Zhabrina, Alya Talitha

Universitas Pembangunan Nasional Veteran
Yogyakarta

Abstract

Laboratory activities involve the use of various chemical substances, both metallic and non-metallic, some of which are classified as hazardous and non-hazardous (non-B3). Used chemicals, whether hazardous or non-hazardous, can become waste that potentially endangers the environment and human health if not properly handled or treated. The management of waste from laboratory activities is still limited, often resulting in the storage of liquid waste in warehouses. Existing treatment methods include coagulation, flocculation, adsorption, electrocoagulation, filtration, and neutralization. In this study, the electrocoagulation method combined with pneumatic agitation is used. The purpose of the research was to enhance the effectiveness of chemical wastewater treatment, such combination of electrocoagulation with pneumatic agitation. The evaluation is based on two factors: the amount of coagulant used and variations in pH. The pollutant parameters tested include TDS (Total Dissolved Solids), TSS (Total Suspended Solids), turbidity, pH, salinity, Pb (lead), and COD (Chemical Oxygen Demand). The results indicated increasing the coagulant dose affects reducing turbidity, TSS, Pb, and COD. Increasing the coagulant dose does not affect reducing TDS and salinity. Increasing waste pH affects reducing turbidity, Pb, and COD. Increasing pH does not have a significant effect on reducing TSS, TDS, and salinity.

Keywords: Chemical wastewater, Electrocoagulation, Pneumatic Agitation

Topic: Engineering