Amid the booming leather industry in Bangladesh, numerous tanneries face severe wastewater treatment challenges. A particular tannery discharges 120 tons of leather wastewater daily (with a processing capacity of 5 tons per hour), producing highly complex and severely polluted effluent. The wastewater contains substantial amounts of hard-to-degrade organic compounds, high concentrations of chromium ions and sulfides, along with significant suspended solids and ammonia nitrogen. If discharged untreated, these pollutants could cause catastrophic damage to local rivers and soil ecosystems, while also posing serious threats to drinking water safety and public health in surrounding communities. Conventional wastewater treatment methods fail to meet increasingly stringent environmental standards, making it imperative for the facility to adopt an efficient and stable wastewater treatment solution.
Therefore, our company JX-purification has developed a customized wastewater treatment solution based on MBR (Membrane Bioreactor) technology: a set of membrane modules consisting of 36 MBR membranes, each 15 square meters in size. As shown in the video:
The MBR membrane solution adopted in this project demonstrates multiple significant advantages over traditional wastewater treatment processes. Firstly, it requires only 1/3 to 1/2 the space of conventional methods, effectively conserving the limited site resources of leather factories. Secondly, it achieves high treatment efficiency with stable and reliable effluent quality that meets stringent environmental standards. Furthermore, the reduced sludge production lowers both sludge disposal costs and secondary pollution risks. Additionally, the highly automated MBR membrane modules feature user-friendly operation, significantly reducing labor maintenance costs and operational workload.
The successful implementation of this wastewater treatment project at the 5-ton-per-hour leather factory in Bangladesh has not only resolved the long-standing wastewater management challenges for the facility, ensuring sustainable development, but also established a replicable model for wastewater treatment in Bangladesh's leather industry. Moving forward, our company will continue to innovate and apply wastewater treatment technologies, providing efficient and eco-friendly solutions to more enterprises while contributing to global environmental protection efforts.
Finally, please note (This is my 40 years experience engineer suggestion): The customer's pipeline lacks both a negative pressure gauge and flow meter. Without the negative pressure gauge, we can't determine when the membrane will become blocked. Our membrane modules will stop functioning when the negative pressure drops to 50 kPa. Backwashing should be performed every 3-4 hours for 1-3 minutes, with backwash pressure maintained below 1 kg. The water source for backwashing must be strictly clean.
And if the filtration is sewage, stop quickly and cultivate the sludge before running the membrane. Otherwise it is easy to clog.
