Optimizing biomethane production of mesophilic chicken manure and sheep manure digestion: Mono-digestion and co-digestion kinetic investigation, autofluorescence analysis and microbial community assessment

Song, Liuying; Li, Dunjie; Cao, Xiangyunong; Tang, Yu; Liu, Rutao; Niu, Qigui; Li, Yu You

doi:10.1016/j.jenvman.2019.02.050

Cited by 35 publications

(6 citation statements)

References 40 publications

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“…However, only one peak in the daily biomethane production of 766.56 mL N was observed at day 13 for the CM group because of the high content of easily degraded organic. This observation indicates that asynchronism obviously existed between the digestions of CS and CM, due to the differences of the characteristics and compositions between CS and CM . A similar result during the co-digestion of pig manure and grass silage was reported by Hassan et al In addition, for co-digestion, the daily biomethane production of 872.69, 956.46, and 818.28 mL N for the first peak, and 443.37, 569.10, and 603.40 mL N for the second peak were observed for the CS + CM, KOH CS + CM and LFD CS + CM groups, respectively.…”

Section: Resultssupporting

confidence: 79%

“…This observation indicates that asynchronism obviously existed between the digestions of CS and CM, due to the differences of the characteristics and compositions between CS and CM. 33 A similar result during the co-digestion of pig manure and grass silage was reported by Hassan et al 14 In addition, for co-digestion, the daily biomethane production of 872.69, 956.46, and 818.28 mL N for the first peak, and 443.37, 569.10, and 603.40 mL N for the second peak were observed for the CS + CM, KOH CS + CM and LFD CS + CM groups, respectively. Compared to KOH modification, the increase in the daily biomethane production was obvious as a result of LFD modification, particularly at the beginning of the digestion process.…”

Section: Resultsmentioning

confidence: 99%

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Impacts of Modification of Corn Stover on the Synergistic Effect and Microbial Community Structure of Co-Digestion with Chicken Manure

et al. 2019

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The anaerobic digestion (AD) technology has been widely used to convert biowaste to bioenergy. In most cases in China, AD facilities need to use multiple feedstocks because of the availability of biowastes in certain areas. However, different biowastes have different biodegradabilities, leading to different AD conversion rates and lower conversion efficiency when two or more different biowastes are directly co-digested. This study used potassium hydroxide (KOH) and liquid fraction of digestate (LFD) to modify the refractory corn stover (CS) to improve its biodegradability and then be co-digested with readily biodegradable chicken manure (CM). The co-digestion efficiency was expected to increase because of the improved biodegradability of CS by the modifications. The results showed that as compared to untreated CS, 40.83 and 39.38% more biomethane were produced for the co-digestion of CM and CS with KOH and LFD modification, respectively. In addition, the digestion times were reduced by 20 and 30% than the CS + CM group, respectively. The function and response of the microbial community varied with the modifications in population and diversity under mesophilic conditions. Methanosaeta, Methanosarcina, and Methanobacterium were the dominant biomethane-producing archaeal in mono- and co-digestion. Both KOH and LFD modifications could improve the synergistic effect of co-digestion of CS and CM, but LFD modification is recommended because there is no need for extra cost input.

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Section: Resultssupporting

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Impacts of Modification of Corn Stover on the Synergistic Effect and Microbial Community Structure of Co-Digestion with Chicken Manure

et al. 2019

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“…Biogas production was measured using a syringe and converted to the standard conditions. The carbon dioxide contents were captured completely by a saturated NaOH solution, with the measured value for biomethane, as described in our previous report . The biogas and biomethane were measured following the reaction and transferred to the standard atmospheric pressure.…”

Section: Methodsmentioning

confidence: 99%

Optimization of Biomethane Production in Mono-Cardboard Digestion: Key Parameters Influence, Batch Test Kinetic Evaluation, and DOM Indicators Variation

Song

Fang

et al. 2019

Energy Fuels

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Mono-cardboard waste digestion in batch tests associated with different impact factors was investigated. The maximum methane generation was 394 mL/gVSadd with the best F/M of 0.5 at mesophilic conditions. The highest methane content reached 75% in the dynamic water bath feeding with an average particle size of 1–3 mm. Hydrolysis and methanogenesis were significantly different between static and dynamic states, especially at particle size over 3 mm. The modified Gompertz model (R 2 > 0.98) and the modified Aiba model (R 2 > 0.88) were the most appropriate models for methane generation among the six kinds of models. At different TS, the variation of dissolved organic matters reflects the metabolic rate of the microbial community. The soluble microbial product-like and protein-like components half split by excitation–emission matrix-parallel factors significantly negatively corresponded to biomethane production. Moreover, a rapid loss of methanogenesis was observed with high organics concentration. A strong correlation between the F/M ratio and the CH4 generation ability was observed with an optimized F/M of 0.5. The maximum energy production was also investigated based on the optimized particle size of 2–5 mm and F/M of 0.5, in which long-term stability was maintained.

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“…The three-dimensional excitation-emission matrix (EEM) was described in our previous method reported [14]. The zeta potential of the sludge-water mixture was measured by the microelectrophoresis instrument (Shanghai Zhongchen JS94H) at 142.5 h to analyze the variances of sludge physical properties.…”

Section: Chemical Analysismentioning

confidence: 99%

“…EPS was extracted using the heat method as in our previous study [14]. The PN concentration in EPS was measured by the BCA Protein Assay Kit (Nanjing Jiancheng Bioengineering Institute A045-4).…”

Section: Eps Extraction and Analysismentioning

confidence: 99%

Influences of Naphthalene Concentration on Starch Anaerobic Digestion: Focusing on Digestion Performance, Extracellular Polymeric Substances and Function Microbial Community

Yao

Xue

et al. 2022

Sustainability

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Polycyclic aromatic hydrocarbons (PAHs) are widely distributed in the sludge environment due to activities such as oil extraction and pose a serious threat to deep-seated anaerobic microorganisms. Thus, in this study, we discussed the dose–response efficiency of naphthalene (Nap, a typical PAH) on anaerobic digestion (AD) through co-metabolic degradation via batch experiments. The batch results showed that 30 mg/L Nap promoted the AD with the accumulation of CH4 18.54% higher than the control (without Nap) by increasing the efficiency of hydrolysis and acetogenesis 99.49% and 61.95%, respectively. However, adverse effects were observed with an excessive dosage of Nap (higher than 100 mg/L) with a decrease of methane production (37.16) with 2000 mg/L Nap. Interestingly, the concentrations of the polysaccharide and protein reached the highest at 138.76 mg/L and 400.41 mg/L, respectively, in 1000 mg/L Nap. Furthermore, the high activities of hydrolase and transmembrane ATPase were acquired in 30 mg/L Nap. In addition, Nap significantly affected the methanogenic microbial abundance and diversity, especially diminishing Methanolinea and Syntrophobacter. Furthermore, the enrichment of Bacteroides in 30 mg/L Nap showed moderate Nap could facilitate hydrolysis. The genes relevant to cellular processes were activated by Nap. This research provided a reliable basis for the anaerobic microbial response under Nap stress.

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Optimizing biomethane production of mesophilic chicken manure and sheep manure digestion: Mono-digestion and co-digestion kinetic investigation, autofluorescence analysis and microbial community assessment

Cited by 35 publications

References 40 publications

Impacts of Modification of Corn Stover on the Synergistic Effect and Microbial Community Structure of Co-Digestion with Chicken Manure

Impacts of Modification of Corn Stover on the Synergistic Effect and Microbial Community Structure of Co-Digestion with Chicken Manure

Optimization of Biomethane Production in Mono-Cardboard Digestion: Key Parameters Influence, Batch Test Kinetic Evaluation, and DOM Indicators Variation

Influences of Naphthalene Concentration on Starch Anaerobic Digestion: Focusing on Digestion Performance, Extracellular Polymeric Substances and Function Microbial Community

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