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Processing High-Solid and High-Ammonia Rich Manures in a Two-Stage (Liquid-Solid) Low-Temperature Anaerobic Digestion Process: Start-Up and Operating Strategies.

Author(s): Mahato P, Goyette B, Rahaman MS, Rajagopal R

Bioengineering (Basel). 2020 Jul 25;7(3): Authors: Mahato P, Goyette B, Rahaman MS, Rajagopal R

Article GUID: 32722477
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pH-sensitive and magnetically separable Fe/Cu bimetallic nanoparticles supported by graphene oxide (GO) for high-efficiency removal of tetracyclines.

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Crossflow electrochemical filtration for elimination of ibuprofen and bisphenol a from pure and competing electrolytic solution conditions.

Author(s): Bakr AR, Rahaman MS

J Hazard Mater. 2019 Mar 05;365:615-621 Authors: Bakr AR, Rahaman MS

Article GUID: 30471576
Fouling and wetting in the membrane distillation driven wastewater reclamation process - A review.

Author(s): Choudhury MR, Anwar N, Jassby D, Rahaman MS

Adv Colloid Interface Sci. 2019 Apr 27;269:370-399 Authors: Choudhury MR, Anwar N, Jassby D, Rahaman MS

Article GUID: 31129338
Title:Processing High-Solid and High-Ammonia Rich Manures in a Two-Stage (Liquid-Solid) Low-Temperature Anaerobic Digestion Process: Start-Up and Operating Strategies.
Authors:Mahato P,  Goyette B,  Rahaman MS,  Rajagopal R
Link:https://www.ncbi.nlm.nih.gov/pubmed/32722477
DOI:10.3390/bioengineering7030080
Category:Bioengineering (Basel)
PMID:32722477
Dept Affiliation: ENCS
1 Sherbrooke Research and Development Center, Agriculture and Agri-Food Canada, 2000 College Street, Sherbrooke, QC J1M 0C8, Canada.
2 Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, QC H3G 1M8, Canada.

Description:

Processing High-Solid and High-Ammonia Rich Manures in a Two-Stage (Liquid-Solid) Low-Temperature Anaerobic Digestion Process: Start-Up and Operating Strategies.

Bioengineering (Basel). 2020 Jul 25;7(3):

Authors: Mahato P, Goyette B, Rahaman MS, Rajagopal R

Abstract

Globally, livestock and poultry production leads to total emissions of 7.1 Gigatonnes of CO2-equiv per year, representing 14.5% of all anthropogenic greenhouse gas emissions. Anaerobic digestion (AD) is one of the sustainable approaches to generate methane (CH4) from manure, but the risk of ammonia inhibition in high-solids AD can limit the process. Our objective was to develop a two-stage (liquid-solid) AD biotechnology, treating chicken (CM) + dairy cow (DM) manure mixtures at 20 °C using adapted liquid inoculum that could make livestock farming more sustainable. The effect of organic loading rates (OLR), cycle length, and the mode of operation (particularly liquid inoculum recirculation-percolation mode) was evaluated in a two-stage closed-loop system. After the inoculum adaptation phase, aforementioned two-stage batch-mode AD operation was conducted for the co-digestion of CM + DM (Total Solids (TS): 48-51% and Total Kjeldahl Nitrogen (TKN): 13.5 g/L) at an OLR of 3.7-4.7 gVS/L.d. Two cycles of different cycle lengths (112-d and 78-d for cycles 1 and 2, respectively) were operated with a CM:DM mix ratio of 1:1 (w/w) based on a fresh weight basis. Specific methane yield (SMY) of 0.35 ± 0.11 L CH4g/VSfed was obtained with a CH4 concentration of above 60% for both the cycles and Soluble Chemical Oxygen Demand (CODs) and volatile solid (VS) reductions up to 85% and 60%, respectively. For a comparison purpose, a similar batch-mode operation was conducted for mono-digestion of CM (TS: 65-73% and TKN: 21-23 g/L), which resulted in a SMY of 0.52 ± 0.13 L CH4g/VSfed. In terms of efficiency towards methane-rich biogas production and ammonia inhibitions, CM + DM co-digestion showed comparatively better quality methane and generated lower free ammonia than CM mono-digestion. Further study is underway to optimize the operating parameters for the co-digestion process and to overcome inhibitions and high energy demand, especially for cold countries.

PMID: 32722477 [PubMed]