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Tannery wastewater as nutrient supply in production of biogas from solid tannery wastes mixed through anaerobic co-digestion
Process Safety and Environmental Protection ( IF 4.384 ) Pub Date : 2019-12-20 , DOI: 10.1016/j.psep.2019.11.037
Caroline Borges Agustini; Marisa da Costa; Mariliz Gutterres

The possibility of using tannery raw wastewater as substitute for the nutrient supply in the anaerobic co-digestion of two tannery solid waste was investigated with regard to energy efficiency, waste treatment efficiency and economic efficiency. The results showed that the use of tannery wastewater as a source of nutrients for the AD of solid tannery waste proved to be adequate from the point of view that the three residues are being treated simultaneously. There was a biogas production of only 1.9 ± 0.3 mL/VSS. However, the percentage of methane in the biogas reached 33% at the beginning of the process, proving that there was methanogenic activity and that AD established. The cost analysis showed that there is a great reduction in the cost of wastewater treatment and solid waste disposal of 23% and 18%, respectively, in terms of electricity consumption and 11% and 8% respectively in terms of thermal consumption.
更新日期:2019-12-21

 

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