Investigation of Waste Water Quality Parameters Discharged from Textile Manufacturing Industries of Bangladesh

Abstract

Textile manufacturing sector is the strongest root of the economy of Bangladesh while pollution by inappropriate management of waste water from textile dyeing industries is one of the major environmental problems. Textile processing employs an assortment of chemicals, contingent upon the idea of the crude materials and items. Environmental problems caused by the the textile industry are mainly the discharges of waste water. The wellspring of waste water contamination are the wet handling steps which incorporate measuring, desizing, scouring, bleaching, mercerizing, coloring, printing etc. The present study was aimed at physico-chemical evaluation of waste water discharged by some garments industries. While in some waste water high pH values have been recorded, the pH values of the waste water before and after treatments were found in between the standard range. The Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Dissolved Solid (TDS) and Total Suspended Solid (TSS) values for waste water before treatment were found to be much higher than the permissible limits. For some industries the BOD, COD, TDS and TSS values of the outlet water from effluent treatment plant (ETP) were also found beyond the standard limits.

Industrial Water Demand and Wastewater Generation: Challenges for Bangladesh’s Water Industry

“…Others reported that the treated effluents from a textile industry failed to meet the DOE discharge standard for TDS (only 24.6% removal), BOD (79.5% removal), and COD (78.1% removal) . Similarly, treated effluents from different plants in the capital city of Dhaka showed BOD, COD, TDS, and TSS values higher than the permissible limits. ,, The main problems experienced by various plants with ETPs are inadequate treatment due to incorrect dosing of chemicals required in the treatment process or inactivity and even death of necessary microorganisms due to the high or low pH, insufficient oxygen, or lack of nutrients. These challenges need to be addressed with adequate research and the help of experienced operators to improve the performance of ETPs in Bangladesh.…”

“…More than 80% of Bangladesh’s export income is associated with the textile industry, and that makes up more than 10% of the country’s gross domestic product. − Recent data show that there are more than 5000 active textile factories in Bangladesh, mostly located in Dhaka and the surrounding areas (Figure S1). − Currently, water consumption by a textile factory in Bangladesh is ∼250–300 L/kg of textile produced. − In addition to water, various manufacturing steps require many dyes and inorganic chemicals and eventually generate a large volume of wastewater. − In 2020 and 2021, leather and leather products were Bangladesh’s second-largest export behind ready-made garments, totaling $941.8 million, which was ∼2.43% of the country’s total export earnings . Currently, Bangladesh is home to 220 tanneries, 2500 other manufacturing facilities, and 90 major businesses that have water demands .…”

Evaluation of antibacterial activity, in-vitro cytotoxicity and catalytic activity of biologically synthesized silver nanoparticles using leaf extracts of Leea macrophylla

“…In third world countries like Bangladesh, India and Pakistan the industrial wastewater discharged after improper treatment or in some cases without treatment [ 68 ]. Such wastewater containing synthetic dyes and other harmful chemicals is detrimental for the environment and living beings.…”