Dry mesophilic anaerobic co-digestion of vegetable wastes with animal manures using leach bed reactor

Mlaik, Najwa; Sayadi, Sami; Mnasri, Nesrine; Kechaou, Sonia; Loukil, Salim; Aloui, Fathi; Khoufi, Sonia

doi:10.1007/s13399-020-01165-3

Cited by 6 publications

(2 citation statements)

References 57 publications

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“…Of note, the CMY of PV in this study (380.5 mL/g VS) was signi cantly higher than the highest CMY in literature reports from co-AD of pig manure with vegetable wastes (244.3 mL/g VS), pig manure with rice straw (188.8 mL/g VS), pig manure with corn straw (220 mL/g VS), and pig manure with Pennisetum hybrid (299.0 mL/g VS) [3,[25][26][27]. Zhu et al (2022b) [15] used 4.0% KOH to treat eggplant residues to obtain a CMY of 159.0 mL/g VS. Cai et al (2019) [28] predicted the methane production performances of different vegetable wastes and found that the methane production potentials of pepper stem and potato stem were 120.1 mL/g VS and 187.4 mL/g VS, respectively.…”

Section: Comparison and Validation Experimentsmentioning

confidence: 99%

Optimization of the Process Conditions for Methane Yield from Co-Digestion of Mixed Vegetable Residues and Pig Manure Using Response Surface Methodology

Meng,

Li,

Han

et al. 2024

Waste Biomass Valor

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To determine optimized conditions for co-digestion for a mixture of four kinds of mixed vegetable crop residues consisting of cucumber, tomato, eggplant, and pepper mixed in equal parts on a mass basis, codigestion experiments were carried out with pig manure. The interaction effects of parameters such as manure-to-mixed vegetable residues ratios (M/S), initial pH, and organic load (OL) were investigated with respect to cumulative methane yield using response surface methodology (RSM). The highest cumulative methane yield was calculated to be 380.50 mL/g VS at an initial pH of 7.3, OL of 18.8 g VS/L, and M/S of 3.9:1. Comparison and veri cation experiments showed that under optimized conditions the co-digestion process showed increased the methane yield and had practical application value. The microbial analysis showed that the relative abundances of bacterial taxa, such as Clostridium_sensu_stricto_1, Fastidiosipila, and Terrisporobacter, were all highest in the co-digestion samples under optimized process conditions (PV). Different types of methanogenic archaea taxa in PV samples were richer than other samples, which showed higher relative abundances of Methanogenium, Methanobrevibacter, Methanoplanus, Methanospirillum, and Methanobrevibacter. Thus, the co-digestion system of a mixture of vegetable residues and pig manure can enrich different types of methanogenic archaea taxa, which leads to increased digestion performance, and may strengthen process stability. Importantly, pig manure, mixed vegetable residues can be included into anaerobic digestion applications through co-digestion, thus enabling valorization of these substantial residues and can be engineered for applications.

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Section: Comparison and Validation Experimentsmentioning

confidence: 99%

Optimization of the Process Conditions for Methane Yield from Co-Digestion of Mixed Vegetable Residues and Pig Manure Using Response Surface Methodology

Meng,

Li,

Han

et al. 2024

Waste Biomass Valor

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“…An LBR requires minimum water and no mechanical stirring, while protecting the methanogenic reactor from the accumulation of CM's inorganic solids 24,25 . The LBR has been implemented in a one‐stage system for the dry AD of the organic fraction of municipal solid wastes, 26 vegetable wastes with animal manures, 27 and CM 28,29 . Two‐stage AD has also been recently used to treat cow manure, pig manure, and food waste 30‐33 .…”

Section: Introductionmentioning

confidence: 99%

Biogas production from chicken manure wastes using an LBR‐CSTR two‐stage system: process efficiency, economic feasibility, and carbon dioxide footprint

Kalogiannis

Vasiliadou

Spyridonidis

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND The growth of poultry farming has increased the amount of chicken manure (CM) being produced. In this study, CM was digested in a two‐stage anaerobic digestion (AD) system consisting of three leach bed reactors (LBRs) and a continuous stirred tank reactor (CSTR) coupled with sedimentation tanks (anaerobic contact process). The accumulated biomass and supernatant from the sedimentation tank were returned to the CSTR and the LBRs, respectively, resulting in an almost closed (water) circuit process. In addition, zeolite was used as bulking agent and adsorbent for ammonia in the LBRs. RESULTS This study revealed that the methane yield remained on average at 0.17 NL g−1 of Volatile Solids (VS), corresponding to the 43% of the CM biochemical methane potential as determined in separate batch tests (0.40 NL g−1 VS). Electrical conductivity gradually increased from 22 to 26 mS cm−1; however, the ammonia nitrogen concentration was stable at 2.28 g L−1, which was attributed to zeolite used as LBRs' bulking agent. A preliminary design of a full‐scale LBR‐CSTR facility was conducted for a poultry farm growing one million broilers per year. Its CO2 footprint was evaluated based on literature indices. CONCLUSION The proposed facility has a capacity of 130 kW Combined Heat and Power (CHP) and a payback period of 8.6 years. In terms of GHG emissions, implementing the LBR‐CSTR system for biogas production could potentially reduce the CO2 footprint of the farm from 1.38 to 0.49 kg CO2 eq/head. © 2022 Society of Chemical Industry (SCI).

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Optimization of anaerobic co-digestion of fruit and vegetable waste with animal manure feedstocks using mixture design

Mlaik

Sayadi

Masmoudi

et al. 2022

Biomass Conv. Bioref.

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Dry mesophilic anaerobic co-digestion of vegetable wastes with animal manures using leach bed reactor

Cited by 6 publications

References 57 publications

Optimization of the Process Conditions for Methane Yield from Co-Digestion of Mixed Vegetable Residues and Pig Manure Using Response Surface Methodology

Optimization of the Process Conditions for Methane Yield from Co-Digestion of Mixed Vegetable Residues and Pig Manure Using Response Surface Methodology

Biogas production from chicken manure wastes using an LBR‐CSTR two‐stage system: process efficiency, economic feasibility, and carbon dioxide footprint

Optimization of anaerobic co-digestion of fruit and vegetable waste with animal manure feedstocks using mixture design

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