Chicken manure and wheat straw co-digestion in batch leach bed reactors: optimization of the start-up conditions

Zayen, Amal; Sayadi, Sami; Sousbie, Philippe; Bernet, Nicolas; Torrijos, Michel; Escudié, Renaud

doi:10.1007/s13399-021-01912-0

Cited by 5 publications

(4 citation statements)

References 33 publications

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“…A leach bed reactor (LBR) is an attractive technology for the AD of high solid wastes. LBRs can digest high-solid waste, with a low water requirement and no stirring equipment, resulting in a cost-effective and straightforward operation [17][18][19]. On the other hand, LBRs require bulking agents (i.e., straw, sawdust, or agricultural wastes) to increase their porosity, which influences the liquid distribution and permeability, while avoiding clogging and channeling problems.…”

Section: Introductionmentioning

confidence: 99%

Effect of Zeolite on the Methane Production from Chicken Manure Leachate

2022

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This study demonstrates the leachate characteristics derived from bench-scale leach-bed reactors (LBRs) filled with chicken manure (CM) and zeolite. Zeolite was used to maintain the necessary porosity for the leaching process and to adsorb ammonia. Fresh water was added for leachate production and removed daily, in order to estimate the readily leachable organic and nitrogen matter of the CM. Tests were conducted at two ratios of zeolite to bed (10% and 3.5% v/v CMbed). Other operating parameters studied were the amount of water added in the LBRs, the leachate recirculation rate, and the hydraulic retention time (HRT). A control LBR with river pebbles at a similar size and ratio (10% v/v) with zeolite was also studied. Some experiments were repeated with CM, which had different characteristics. Compared to the control test, the LBR with zeolite at 10% v/v yielded leachate with less NH3 and a higher biochemical methane potential (BMP). However, free ΝH3 in the control experiment was below the inhibition threshold, proving that zeolite contributes to the higher BMP of leachate, and that this effect is not only due to NH3 adsorption.

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Section: Introductionmentioning

confidence: 99%

Effect of Zeolite on the Methane Production from Chicken Manure Leachate

2022

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“…To overcome its bad digestibility due to the lignocellulosic structure, it is common to apply various pretreatment methods like acidic or alkali pretreatment [24][25][26], enzymatic treatments [27], milling [28,29] or thermo-oxidation with H 2 O 2 [30], among others. Another method is the fermentation of straw in co-digestion with manure, which offers many advantages as it provides an improved C/N ratio, better nutrient balance, dilution of toxic substances, and thus a higher biogas yield [24,[31][32][33]. However, hydrolysis or acid yields from the anaerobic microbial hydrolysis of straw are rarely described in literature.…”

Section: Introductionmentioning

confidence: 99%

Plug-flow hydrolysis with lignocellulosic residues: Effect of hydraulic retention time and thin-sludge recirculation

Menzel

Neubauer

Junne

2023

Preprint

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Two parallel plug-flow reactors were successfully applied as a hydrolysis stage for the anaerobic pre-digestion of maize silage and recalcitrant bedding straw (30 % and 66 % w/w) under variations of the hydraulic retention time (HRT) and thin-sludge recirculation. The study proved that the hydrolysis rate profits from shorter HRTs while the hydrolysis yield remained similar and was limited by a low pH-value and reached values of 264 - 310 and 180 - 200 gO2 kgVS-1 for 30 % and 66 % of bedding straw correspondingly. Longer HRT led to metabolite accumulation, significantly increased gas production, a higher acid production rate and a 10 to 18 % higher acid yield of 78 gSCCA kgVS-1 for 66 % of straw. Thin-sludge recirculation increased the acid yield and stabilized the process, especially at a short HRT. Hydrolysis efficiency can thus be improved by shorter HRT, whereas the acidogenic process performance is increased by longer HRT and thin-sludge recirculation. Two main fermentation patterns of the acidogenic community were found: above a pH-value of 3.8, butyric and acetic acid were the main products, while below a pH-value of 3.5, lactic, acetic and succinic acid were mainly accumulating. During plug-flow digestion with recirculation, at low pH-values, butyric acid remained high compared to all other acids. Both fermentation patterns had virtually equal yields of hydrolysis and acidogenesis and showed good reproducibility among the parallel reactor operation. The suitable combination of HRT and thin-sludge recirculation proved to be useful in a plug-flow hydrolysis as primary stage in biorefinery systems with the benefits of a wider feedstock spectrum including feedstock with cellulolytic components at an increased process robustness against changes in the feedstock composition.

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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%

“…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][31][32][33] However, two-stage AD has not been applied to CM before.…”

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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Chicken manure and wheat straw co-digestion in batch leach bed reactors: optimization of the start-up conditions

Cited by 5 publications

References 33 publications

Effect of Zeolite on the Methane Production from Chicken Manure Leachate

Effect of Zeolite on the Methane Production from Chicken Manure Leachate

Plug-flow hydrolysis with lignocellulosic residues: Effect of hydraulic retention time and thin-sludge recirculation

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

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