PL EN
Effects of Dosage and Stirring Speed Variations in the Use of Bittern as a Natural Coagulant to Remove Biological Oxygen Demand, Chemical Oxygen Demand, Total Suspended Solids and Dye Concentrations from Batik Industry Wastewater
 
Więcej
Ukryj
1
Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Kampus C UNAIR, Jalan Mulyorejo, Surabaya 60115, Indonesia
 
2
East Coast Environmental Research Institute, Gong Badak Campus, Universiti Sultan Zainal Abidin, Kuala Terengganu 21300, Malaysia
 
3
Faculty of Bioresource and Food Industry, Besut Campus, Universiti Sultan Zainal Abidin, 22020, Jerteh, Terengganu, Malaysia
 
4
Faculty of Innovative Design and Technology, Universiti Sultan Zainal Abidin, Kampung Gong Badak, 21300, Terengganu, Malaysia
 
5
Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
 
 
Autor do korespondencji
Nurina Fitriani   

Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Kampus C UNAIR, Jalan Mulyorejo, Surabaya 60115, Indonesia
 
 
J. Ecol. Eng. 2024; 25(11):83-99
 
SŁOWA KLUCZOWE
DZIEDZINY
 
STRESZCZENIE
This study aims to determine the effect of bittern coagulant dosage and rapid stirring speed on reducing the concentrations of biological oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), and dye absorbance in batik industry wastewater, and to identify the optimum coagulant dosage and stirring speed. Wastewater samples were collected from a batik industry in the batik center of Sidoarjo, East Java, Indonesia. Dosage variations of 5%, 10%, 15%, and 20% were tested alongside rapid stirring speeds of 100 rpm, 130 rpm, and 160 rpm. The study was conducted on a laboratory scale using the jar test method. Initial wastewater characteristics showed BOD, COD, TSS, and dye absorbance concentrations of 185.68 ± 29.34 mg/L, 10,091 ± 363.24 mg/L, 2,231.33 ± 155.55 mg/L, and 0.212 ± 0.02, respectively. Statistical analysis using the Pearson correlation test and Two-Way ANOVA revealed that variations in coagulant dosage and stirring speed significantly impacted the reduction percentages of BOD, COD, TSS, and dye absorbance. The optimal coagulant dosage was found to be 5%, and the optimal stirring speed was 100 rpm, with reduction percentages for BOD, COD, TSS, and dye absorbance respectively being 80.32%, 65.86%, 92.35%, and 70.77%.
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