Abstract
PurposeThis study aimed to examine the possibilities of the treatment of the by-products generated in the anaerobic digestion (AD) of the organic fraction of municipal solid waste (OFMSW): oxygen stabilization (composting) of the solid digestate and pretreatment with air stripping of the effluents (liquid digestate and leachate from maturation field and reactors from composting).MethodsOxygen stabilization (OS) was performed in full-scale in a mechanical–biological treatment (MBT) plant using three different methods, using an open field or enclosed box reactor with aeration. The ammonia stripping was performed in a pilot-scale installation using effluents from AD (liquid digestate) and OS (leachate from maturation field and reactors).ResultsThe lowest self-heating possibility after the OS was recorded at 28.5 °C, which proves that the most stabilized was the sample after processing with structuring material addition. Due to air stripping, the highest efficiency of ammonium ions removal was noted at the level of 50.6%, with an initial pH value of 10.5, after 12 h. Among the examined factors pH value was found to be significant [the determination coefficient (R2) of 0.93].ConclusionsThe oxygen stabilization of the digestate requires the structuring material addition before being placed in the reactor with aeration. The inert fraction from the ballistic separation of the OFMSW can be an interesting solution, as required structuring material. Air stripping as the effluents pre-treatment step can meet the MBT plants expectations.Graphic
Highlights
Significant growth in the importance of material and energy recovery from waste has been noticeable over the last few decades [1, 2]
This study aimed to examine the possibilities for the treatment of the by-products generated in anaerobic digestion of the organic fraction of municipal solid waste: oxygen stabilization of the digestate and pretreatment with air stripping of the effluents
The oxygen stabilization (OS) of the digestate from anaerobic digestion of the organic fraction of municipal solid waste (OFMSW) in thermophilic conditions is, due to its characteristics: high density jointly with humidity challenging to perform
Summary
Significant growth in the importance of material and energy recovery from waste has been noticeable over the last few decades [1, 2]. The landfilling remains main disposal route, regardless of country income [8]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
