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Organic Fraction of Municipal Solid Waste Recovery by Conversion into Added-Value Polyhydroxyalkanoates and Biogas

Valentino, Francesco; Gottardo, Marco; Micolucci, Federico LU ; Pavan, Paolo; Bolzonella, David; Rossetti, Simona and Majone, Mauro (2018) In ACS Sustainable Chemistry and Engineering 6(12). p.16375-16385
Abstract

The integrated-multistage process proposed herein is a practical example of a biorefinery platform in which the organic fraction of municipal solid waste (OFMSW) is used as a valued source for polyhydroxyalkanoates (PHA) and biogas production. Technical and economical feasibilities of this approach have been demonstrated at pilot-scale, providing a possible upgrade to traditional biowaste management practices, presently based on anaerobic digestion (AD). A pH-controlled OFMSW fermentation stage produced a liquid VFA-rich stream with a high VFA/CODSOL ratio (0.90 COD/COD) that was easily used in the following aerobic stages for biomass and PHA production. The solid fraction was valorized into biogas through AD, obtaining... (More)

The integrated-multistage process proposed herein is a practical example of a biorefinery platform in which the organic fraction of municipal solid waste (OFMSW) is used as a valued source for polyhydroxyalkanoates (PHA) and biogas production. Technical and economical feasibilities of this approach have been demonstrated at pilot-scale, providing a possible upgrade to traditional biowaste management practices, presently based on anaerobic digestion (AD). A pH-controlled OFMSW fermentation stage produced a liquid VFA-rich stream with a high VFA/CODSOL ratio (0.90 COD/COD) that was easily used in the following aerobic stages for biomass and PHA production. The solid fraction was valorized into biogas through AD, obtaining energy and minimizing secondary flux waste generation. The reliable biomass enrichment was demonstrated by a stable feast-famine regime and supported by microbial community analysis. The selected consortium accumulated PHA up to 55% wt. Compared to the traditional AD process in an urban scenario of 900000 AE, the integrated approach for OFMSW valorization is preferable, and it is characterized by an electrical energy production of 85.7 MWh/d and 1.976 t/d as PHA productivity. The proposed process was also evaluated as economically sustainable if the PHA is marketed from 0.90 €/kg as the minimum threshold to a higher market price.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Anaerobic digestion, Mixed microbial culture (MMC), Organic fraction of municipal solid waste (OFMSW), Polyhydroxyalkanoates (PHA), Renewable feedstock, Volatile fatty acid (VFA)
in
ACS Sustainable Chemistry and Engineering
volume
6
issue
12
pages
16375 - 16385
publisher
The American Chemical Society
external identifiers
  • scopus:85056087661
ISSN
2168-0485
DOI
10.1021/acssuschemeng.8b03454
language
English
LU publication?
yes
id
f25ca518-7f39-4ec7-970b-a2508eb3dcda
date added to LUP
2018-11-23 13:01:33
date last changed
2019-02-10 05:10:30
@article{f25ca518-7f39-4ec7-970b-a2508eb3dcda,
  abstract     = {<p>The integrated-multistage process proposed herein is a practical example of a biorefinery platform in which the organic fraction of municipal solid waste (OFMSW) is used as a valued source for polyhydroxyalkanoates (PHA) and biogas production. Technical and economical feasibilities of this approach have been demonstrated at pilot-scale, providing a possible upgrade to traditional biowaste management practices, presently based on anaerobic digestion (AD). A pH-controlled OFMSW fermentation stage produced a liquid VFA-rich stream with a high VFA/COD<sub>SOL</sub> ratio (0.90 COD/COD) that was easily used in the following aerobic stages for biomass and PHA production. The solid fraction was valorized into biogas through AD, obtaining energy and minimizing secondary flux waste generation. The reliable biomass enrichment was demonstrated by a stable feast-famine regime and supported by microbial community analysis. The selected consortium accumulated PHA up to 55% wt. Compared to the traditional AD process in an urban scenario of 900000 AE, the integrated approach for OFMSW valorization is preferable, and it is characterized by an electrical energy production of 85.7 MWh/d and 1.976 t/d as PHA productivity. The proposed process was also evaluated as economically sustainable if the PHA is marketed from 0.90 €/kg as the minimum threshold to a higher market price.</p>},
  author       = {Valentino, Francesco and Gottardo, Marco and Micolucci, Federico and Pavan, Paolo and Bolzonella, David and Rossetti, Simona and Majone, Mauro},
  issn         = {2168-0485},
  keyword      = {Anaerobic digestion,Mixed microbial culture (MMC),Organic fraction of municipal solid waste (OFMSW),Polyhydroxyalkanoates (PHA),Renewable feedstock,Volatile fatty acid (VFA)},
  language     = {eng},
  month        = {12},
  number       = {12},
  pages        = {16375--16385},
  publisher    = {The American Chemical Society},
  series       = {ACS Sustainable Chemistry and Engineering},
  title        = {Organic Fraction of Municipal Solid Waste Recovery by Conversion into Added-Value Polyhydroxyalkanoates and Biogas},
  url          = {http://dx.doi.org/10.1021/acssuschemeng.8b03454},
  volume       = {6},
  year         = {2018},
}