Biological waste management of leather tannery effluents in India: current options and future research needs
This paper reviews the major biological treatment methods applied for tannery effluents in India. Anaerobic methods and activated sludge process have been the preferred treatment options. Sequencing batch reactor process holds promise for tannery effluents but the technology is yet to see the light of the day in India. Design of aerobic systems needs major overhaul through modelling approaches of the International Water Association (IWA). The failure of aerobic systems to deal with persistent substances in tannery wastewater has prompted the use of advanced treatment methods; their application however to large-scale treatment plants remains a major challenge.
Keywords: tannery wastewater, anaerobic lagoons, anaerobic filters, UASB, upflow anaerobic sludge blanket, extended aeration process, SBR, sequencing batch reactors, modelling, advanced treatment, wastewater treatment, leather tanneries, effluents, India