Environmental audit of a textile effluent treatment plant in Gazipur, Bangladesh
Sk.Md. Imdadul Islam*, Mohammad Iqbal Hossain, Muhammad Raihan
Existing condition of an ETP was observed.
Operational process of the ETP was evaluated.
Efficiency of BOD and COD removal was determined.
A simple but strong methodology was developed for evaluating the performance of the ETP.
Some techniques were suggested to augment the efficiency of the ETP.
Environmental auditing is a necessary tool for determining the impact on environment for industries or any productive sectors. Environmental auditing therefore provides a 'snap-shot' of looking, i.e. what is happening at that point in a certain time. The performance of the plant actually comes from the efficiency of individual units of an effluent treatment plant (ETP) and the final effluent quality. In this study, an ETP of a textile industry in Gazipur, Bangladesh was analyzed. Bangladesh is a globally renowned garment manufacturing center for its durability, quality and beauty. The textiles and garment industry contributes a lion part to the GDP. It is an initial attempt in Bangladesh to initiate the practice of environmental audit. The samples were collected from the central unit of ETP and were analyzed for the fundamental parameters, e.g. DO, BOD, COD, TSS, pH, color and turbidity. The outcomes were used to identify problems with the treatment units and to suggest modifications. Finally, a simple but strong methodology was developed for evaluating the performance of the different treatment units and the ETP as a whole. It could be implemented by ETP director so that the effluent meets the national standards and conforms to the requirements of global buyers. The audit was performed in three steps and the final outcome was prepared.