Biological treatment of tannery wastewater for resource recovery
Reason: The study is still ongoing until April 2026 in partnership with UCT under the Water Research Commission's project C2022/2023-00923 titled "Evaluation and Modelling of an integrated tannery wastewater treatment system used for resource recovery and process water re-use"
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ANAEROBIC TREATMENT OF TANNERY EFFLUENTS FOR RESOURCE RECOVERY IN A CIRCULAR BIOECONOMY
The datasets presented are for a number of inter-related studies that focussed on the optimisation of the anaerobic treatment of ostrich and bovine tannery wastewater for resource recovery to promote a circular bioeconomy and net positive tannery operations. The studies: https://doi.org/10.1016/j.jclepro.2023.135872;
https://doi.org/10.1016/j.psep.2021.12.027; and
https://doi.org/10.3390/en14092491 investigated the characteristics of different tannery effluent streams, their anaerobic mono/co-digestion, process kinetics, treatment in a biological integrated system (IBS) and suitability of the recovered resources for recycling and/or reuse.
The full-scale application of the IBS at a local medium-sized tannery treating 2258 m3/day of bovine tannery wastewater demonstrated the feasibility of producing a floating sulfur biofilm with 33% elementary sulfur (S0), 3420 m3 of CH4, and 31 tonnes of biofertiliser. The sale of recovered resources and potential savings from 72% reduction in electricity demand and 62% in sludge disposal had a potential revenue of US$5559. The integrated system has a payback period of about 5 years and an internal rate of return of about 18%.
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