Niagara Textiles Ltd is a vertically setup composite textile unit. Management of Niagara Textiles Ltd is always looking for new technologies to develop the industry. The technology which save the environment Niagara Textiles Ltd try to implement this by own for advancement of total industries. They did some important developments unique to the area & that will help transformation of the sector.
Salt Recovery Plant ( SRP) is such a plant which is related with betterment of environment issue of dying sector as well as textile industry. After careful study and trial through last three years Niagara Textiles Ltd adopted this process and it is running successfully. The time Niagara took for the implementation of the plant is not because they were doubt on the technology; it was because they wanted to be sure on the process, practice and cultural part of it. Now the factory is proud today that they have made it happen. It is one of the first plants in Bangladesh successfully that is recycling salts towards the process.
For Aktaruzzaman of Aquatech Engineers Ltd. who has installed and implemented the Salt Recovery Plant by the technology support of Enviros India (Pvt.) Ltd. the journey was even longer than Niagara as it took more than 7 years to see first bulk run plant working in Bangladesh. Aktar was telling that it was my passion and became my sentiment and I never left trying. Now I would like to proudly share that it is going to be one of the happenings that is going to change Bangladesh textile industry drastically. Mr. Hossain added.
“Technologically speaking, Total Dissolved Solid (TDS) is the result of huge amount salts we need to use as electrolyte in our dyeing operations. It is the main barrier for which we could not conserve our water consumption after a certain level. Whenever we were reducing the water use to a certain level our ETP (Effluent Treatment Plant) outlet TDS level was going out of DoE (Department of Environment) requirements. Now after successful implementation of SRP, we easily adopt all water efficient technologies and processes to conserve water consumption. Adoption of those technologies will help us reducing our water use to less than 50 liters per kg of fabric.” explaining Mr. Diamond, Sr. General Manager of Niagara Textiles.
“SRP is the apparatus that will help all the wet processing industries in Bangladesh to become more water efficient than ever. They will be even able to recycle most of its water towards the process. DoE has a requirement that TDS of ETP outlet has to be within 2100 ppm. None of the ETP technologies can reduce TDS. Whenever factories start conserving water their TDS concentration was going high that’s why many factories were not adopting many water saving processes and technologies. SRP will lift this barrier and transfer the TDS back to the process and so TDS to the outlet will be very low”. Mr. Aktar was explaining to this reporter.
We are facing no problem in reusing 70 gram per liter salt brine coming out from our SRP, told ArifurRahmanLiton, Dyeing Manager of Niagara Textiles. We have used that brine to dark color, medium color even to light colors with absolutely no problem, he added. We have trained our operators and supervisors. Now they know exactly what to do to adjust recipe with the change of concentration in the salt brine. Currently we are sending our dyeing bath drop to the SRP and sometimes the first wash bath also. The SRP very successfully separating salt brines resending back to dyeing and fresh water on the other hand for regular use, he concluded.
Mr. Saidur Rahman, Utility and Environment in charge of Niagara Textiles told this reporter that SRP has reduced huge load towards their ETP. Expenditure and management of their ETP has become much easier after successful implementation of the SRP. At one point our ETP had size constraint, now it is smoother. However Niagara Managing Director acknowledged that the greatest advantage of SRP to them is that it is allowing them to increase their dyeing capacity using the ETP, WTP and other utilities. This is a great relief for us, Mr. Hasan concluded.
Shourav Hossain, Engineer, managing Niagara Salt Recovery Plant explained the whole operation to this reporter. He added that we are training SRP operators to make sure necessary checks for safe and efficient use of SRP. He added, the average cost of processing per cubic meter effluent in SRP is BDT 120, while from that water we are recycling salt equivalent to BDT 300. Fresh water coming out from SRP reverse osmosis is an added advantage.
Aktaruzzaman of Aquatech Engineering further explained that Enviros technology is very reliable and well checked in many plants throughout the world. We are quite confident in recovering salt and water in any sort of factories. A plant like Niagara will return on investment in around two and a half years. Furthermore this SRP will open avenues to save more by reducing water consumption, by recycling water. SRP would be the first step for moving towards being zero liquid discharge.
For overcoming challenges related to man and management to make sure optimum use of the plant we have trained engineer base to transfer the project to the factory. Enviros’ Ecot technology is like plug and play. This is easy to install, maintain and operate. Mr. Hossain concluded.
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