| Title | Proof of concept of high-rate decentralized pre-composting of kitchen waste: Optimizing design and operation of a novel drum reactor |
|---|---|
| ID_Doc | 6447 |
| Authors | Sakarika, M; Spiller, M; Baetens, R; Donies, G; Vanderstuyf, J; Vinck, K; Vrancken, KC; Van Barel, G; Du Bois, E; Vlaeminck, SE |
| Title | Proof of concept of high-rate decentralized pre-composting of kitchen waste: Optimizing design and operation of a novel drum reactor |
| Year | 2019 |
| Published | |
| Abstract | Each ton of organic household waste that is collected, transported and composted incurs costs ((sic)75/ton gate fee). Reducing the mass and volume of kitchen waste (KW) at the point of collection can diminish transport requirements and associated costs, while also leading to an overall reduction in gate fees for final processing. To this end, the objective of this research was to deliver a proof of concept for the socalled "urban pre-composter"; a bioreactor for the decentralized, high-rate pre-treatment of KW, that aims at mass and volume reduction at the point of collection. Results show considerable reductions in mass (33%), volume (62%) and organic solids (32%) of real KW, while provision of structure material and separate collection of leachate was found to be unnecessary. The temperature profile, C/N ratio (12) and VS/TS ratio (0.69) indicated that a mature compost can be produced in 68 days (after pre-composting and main composting). An economic Monte Carlo simulation yielded that the urban pre-composter concept is not more expensive than the current approach, provided its cost per unit is (sic)8,000-(sic)14,500 over a 10-year period (OPEX and CAPEX, in 80% of the cases). The urban pre-composter is therefore a promising system for the efficient pre-treatment of organic household waste in an urban context. (C) 2019 Elsevier Ltd. All rights reserved. |
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