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Optimal process design for integrated municipal waste management with energy recovery in Argentina
طراحی فرآیند بهینه برای مدیریت یکپارچه زباله شهری با بازیابی انرژی در آرژانتین-2020 This work presents a comprehensive mathematical model for the optimal selection of municipal waste
treatment alternatives, accounting for co-digestion of sludge and municipal solid waste. The superstructure
of alternatives includes anaerobic digestion under mesophilic or thermophilic conditions,
composting, recycling, and final disposal in a landfill. Anaerobic digesters can be fed with different
mixing ratios of sewage sludge (SS) and the organic fraction of municipal solid waste (OF). A mixedinteger
mathematical programming formulation is proposed to find the optimal process design. It
comprises nonlinear equations to estimate digestion yields according to substrate mixing ratios. Results
for cities of different sizes show that the joint treatment can increase profitability, especially in small
populations. In all cases, co-digestion of the full stream of SS and OF leads to an integrated waste-toenergy
process that maximizes the economic value and reduces environmental impacts of waste by
producing electricity, heat and fertilizer. Keywords: Co-digestion | Waste-to-Energy | Optimization | Superstructure | Process design |
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