Laboratory Wastewater Treatment by Using Combination Methods of AOPs and Chemical-Physical Pretreatments
			
	
 
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				1
				Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya, Jl. Palembang, Prabumulih Km 32, Indralaya, South Sumatera, Indonesia
				 
			 
						
				2
				Chemical Engineering Master Program, Faculty of Engineering, Universitas Sriwijaya, Srijayanegara, Palembang, South Sumatera, Indonesia
				 
			 
										
				
				
		
		 
			
			
		
		
		
		
		
		
	
							
					    		
    			 
    			
    				    					Corresponding author
    					    				    				
    					Tuty Emilia Agustina   
    					Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya, Jl. Palembang, Prabumulih Km 32, Indralaya, South Sumatera, Indonesia
    				
 
    			
				 
    			 
    		 		
			
																																					 
		
	 
		
 
 
Ecol. Eng. Environ. Technol. 2024; 1:216-226
		
 
 
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ABSTRACT
The research activities carried out in the laboratory produce complex wastewater which most likely damage the environmental ecosystem if it is directly disposed of without treatment. Wastewater treatment in this study aimed to reduce the pollutant load contained in laboratory wastewater by using combination methods of Advanced Oxidation Processes (AOPs), and chemical-physical treatment namely coagulation and adsorption processes. The Photo-Fenton process was selected as one of AOPs applied in this treatment. The effect of molar ratio variation and irradiation time in the Photo-Fenton process on the pollution load in the form of pH, COD, BOD, TSS, and heavy metals Zn, Cu, Cr, Pb, and Fe was studied in this research. The results of the analysis of untreated laboratory wastewater samples showed that laboratory wastewater did not meet the wastewater quality standards regulated in the Regulation of the Minister of Environment of the Republic of Indonesia No. 5 of 2014 on Wastewater Quality Standards. In this study, laboratory wastewater was treated using the pre-treatment method of coagulation with alum and adsorption with activated carbon. The best results in this study were obtained in the final adsorption results after treatment with the Photo-Fenton method using a molar ratio of 1: 300 for 60 minutes in which several parameters such as pH, Zn, Cu, Pb, and Fe had met environmental quality standards with the value of each parameter of 7; 0.01 mg/L; 2.9 mg/L; 0.03 mg/L; and 3.15 mg/L respectively. Meanwhile, the percentage reduction of COD, BOD, and TSS parameters was 87.49%, 87.02%, and 72.45% respectively.