Constructed wetland treatment of textile industry wastewater using aquatic macrophytes

Abstract

Textile industry processes are among the most environmentally unfriendly industrial processes, because they produce colour effluent that is heavily polluted the environment. Therefore, effluent from textile industry has to be treated before being discharged into the environment. In this study, experiments were performed to remove the pH, EC, chloride, sulphate, phenols, BOD and COD from the textile industrial effluent in constructed wetlands by using aquatic macrophytes Eichhornia crassipes. The experiments were conducted by different process parameters like nutrient dosage, dilution ratio, pH and contact time using Eichhornia crassipes to reduce the various parameters in a textile industry effluent. From the experiments it was found that the maximum percentage reduction of various parameters in a textile industry wastewater by Eichhornia crassipes were obtained at an optimum nutrient dosage of 60 g, dilution ratio of 10, pH of 8 and contact time of 6 days. Similarly, the validation experiments results showed that the maximum removal percentage of various parameters like EC, TDS, chloride, sulphate, phenols, BOD and COD in a textile industry effluent is about 87.2, 90.2, 82.6, 86.8, 78.5, 91.3, and 92.8% respectively. Finally this study was concluded that Eichhornia crassipes might be used as adsorbents for removing various parameters in a textile industry effluent.