TITLE

Organic Fraction of Municipal Solid Waste Conversion into Polyhydroxyalkanoates (PHA) in a Pilot Scale Anaerobic/Aerobic Process

AUTHOR(S)
Valentino, Francesco; Lorini, Laura; Pavan, Paolo; Bolzonella, David; Majone, Mauro
PUB. DATE
April 2019
SOURCE
CET Journal - Chemical Engineering Transactions;2019, Vol. 74, p265
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In recent years, the attention to organic wastes as a new feedstock for the production of PHA is increased based on the idea that this is the only way to reduce their high cost and to increase their sustainability. For this reason, a pilot platform has been designed to produce PHA from the source-sorted organic fraction of municipal solid waste (OFMSW). The cost-effective system consists in the three-steps anaerobic-aerobic process: the fermentation step was performed in a 200 L CSTR (OLR 20.0 kgVS/m³.d, HRT 3.3 d) in thermophilic conditions (55°C). The VFA-rich mixture was used for the two following aerobic steps: a first sequencing batch reactor (SBR, 100 L) for the production of functionalized PHA-producing biomass (mixed consortium, MMC), and a second batch reactor (50 L) for production of PHA and its maximization inside cell walls. The SBR was operated at 1.2-2.5 kgCOD/m³.d as OLR, and HRT of 1 d (equal to SRT); dynamic feeding regime (feast-famine) was used for consortium selection. The fermentation conditions allowed obtaining a significant COD conversion into VFA. Acetic, propionic and butyric acids accounted for more than 80% of total VFA and the relative yield was 0.45 ± 0.03 CODVFA/VS. The necessary buffering capacity was provided by anaerobic digestate addition, which increased the system alkalinity (2.8 ± 0.2 gCaCO3/L at pH 5.75). In SBR, a strong selective pressure favouring PHA-accumulating organisms was easily reached, as demonstrated by the short feast-to-cycle length ratio (often below 0.12). In the second aerobic accumulation reactor, the biomass was able to accumulate up to 49% gPHA/gVSS. Both aerobic steps were performed without temperature (T) control, avoiding additional consumption of energy; the applied OLR was chosen based on biomass kinetic in order to have a constantly short feast phase and a stable selection/enrichment of PHA-accumulating consortium.
ACCESSION #
137126362

 

Related Articles

  • Toronto Moves Ahead With AD Plant Upgrade. Gorrie, Peter // BioCycle;Jul2016, Vol. 57 Issue 6, p33 

    The article discusses the redevelopment of Dufferin Organics Processing Facility with the expansion of anaerobic digester facility with pretreating feedstock innovative technology of Green Bin organics. The facility processes tons of residential organics, helping the Solid Waste Management...

  • Imidazoline Corrosion Inhibitor in Metal Acid-Phase Reactors in Anaerobic Digestion. GONGZHAO LIU; ZHENSHENG YANG; LINNAN ZHANG; KEQIANG QIU // Journal of Residuals Science & Technology;Jan2015, Vol. 12 Issue 1, p37 

    Acid-phase reactors in anaerobic digestion are widely used for treating solid waste such as kitchen waste and sludge. The purpose of this study was to find the optimum control parameters for corrosion behavior in-vessel .Various physical and chemical parameters were monitored to evaluate water...

  • Comparison of different biological treatment scenarios for the organic fraction of municipal solid waste. Lombardi, L.; Carnevale, E.; Corti, A. // International Journal of Environmental Science & Technology (IJE;Jan2015, Vol. 12 Issue 1, p1 

    The possibility of applying anaerobic digestion (AD) process of the source-selected organic fraction (SS-OF) of municipal solid waste in the south of Tuscany (IT) territory was proposed and evaluated. With respect to a reference scenario, in which the overall amount of SS-OF and garden...

  • Food waste collection and recycling for value-added products: potential applications and challenges in Hong Kong. Lo, Irene; Woon, Kok // Environmental Science & Pollution Research;Apr2016, Vol. 23 Issue 8, p7081 

    About 3600 tonnes food waste are discarded in the landfills in Hong Kong daily. It is expected that the three strategic landfills in Hong Kong will be exhausted by 2020. In consideration of the food waste management environment and community needs in Hong Kong, as well as with reference to the...

  • ORGANIC WASTE USED IN AGRICULTURAL BIOGAS PLANTS. Kazimierowicz, Joanna // Journal of Ecological Engineering;Apr2014, Vol. 15 Issue 2, p88 

    Treatment of organic waste is an ecological and economical problem. Searching method for disposal of these wastes, interest is methane fermentation. The use of this process in agricultural biogas plants allows disposal of hazardous waste, obtaining valuable fertilizer, while the production of...

  • METHANE, WET BIOMASS ... AND RENEWABLE ENERGY.  // BioCycle;Sep2002, Vol. 43 Issue 9, p23 

    Reports commercial developments for managing and processing organic residuals. Installation of a patented anaerobic digestion technology in the processing plant of Seneca Food; Use of a methane gas in anaerobic digesters by the Minnesota Water Reclamation Plant to stabilize biosolid;...

  • ANAEROBIC DIGESTION FACILITY STARTS UP. N.G. // BioCycle;Nov2002, Vol. 43 Issue 11, p41 

    Discusses the start-up of an anaerobic digestion facility as part of an organic waste diversion program in Toronto, Ontario. Utilization of the BTA wet mesophilic anaerobic digestion technology; Description of the facility's design; Explanation of how the digester works; Volume of organics that...

  • Dallas Aims for Zero Waste in Solid Waste Plan; Considers WTE.  // Solid Waste Report;9/10/2012, Vol. 43 Issue 15, p3 

    The article reports that the City Council of Dallas, Texas has formally adopted a solid waste management plan that includes a program to start separate collection of organic waste, on August 22, 2012 with the intention of achieving zero waste, although no timetable was set for meeting this goals.

  • MODELLING OF A PLUG-FLOW PILOT REACTOR PRODUCING VFA BY ANAEROBIC FERMENTATION OF MUNICIPAL SOLID WASTES. Sans, C.; Mata-Alvarez, J.; Cecchi, F.; Pavan, P. // Water Science & Technology;1994, Vol. 30 Issue 12, p125 

    The production of volatile fatty acids (VFA) by anaerobic fermentation of municipal solid wastes was studied at pilot-plant level. A plug-flow reactor (80 1 total volume) without solid or liquid recirculation was employed to digest a mixture of two types of organic fraction of the municipal...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics