Biological pre-treatment: Enhancing biogas production using the highly cellulolytic fungus Trichoderma viride

Mutschlechner, Mira; Illmer, Paul; Wagner, Andreas Otto

doi:10.1016/j.wasman.2015.05.011

Cited by 63 publications

(28 citation statements)

References 33 publications

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“…However, also an inhibition of methanogens has to be considered as methane fluxes give the difference between CH 4 consumption and production. Most known methanogens grow optimally at near-neutral pH (Le Mer and Roger 2001;Mutschlechner et al 2015) which would suggest a malfunction of methanogenesis in our studied forest soils but Schleper et al (2005) showed that Euryarchaeota have a strong ability to adapt to low-pH stress, albeit diversity might be reduced (Hu et al 2013).…”

Section: Discussionmentioning

confidence: 78%

Plant species, temperature, and bedrock affect net methane flux out of grassland and forest soils

2016

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Aims The objectives of this study were to investigate the influence of plants on net methane flux from forest and grassland soils depending on bedrock, temperature, and plant species, and to determine the abundance of methanogenic and methanotrophic microorganisms. Methods Lab-scale gas measurements with forest and grassland soils and different site-specific plants were performed. Next-generation sequencing was conducted to characterize the archaeal community structure and the abundance of methanotrophic bacteria was determined via quantitative PCR. Results Forest and grassland soils had a high potential to consume methane under ambient conditions. Irrespective of bedrock and plant species, a highly significant influence of temperature was established. The studied site-specific grassland plants Plantago lanceolata and Poa pratensis significantly increased methane balance with varying extent depending on temperature. In contrast, the studied forest plants Picea abies and especially Larix decidua significantly boosted methane consumption. The flux measurements pointed to higher net methane consumption rates on limestone compared to siliceous bedrock. The proportion of Euryarchaeotaincluding methanogens-increased in rhizosphere soil of grassland plants compared to bulk soil whereas methanotrophic abundances did not differ between bulk and rhizosphere soil. Conclusions Results highlight that the methane fluxes in uplands soils are altered depending on plant species, temperature, and vegetation type and emphasize the need to better resolve the influence of plants on the methane cycle and the involved microorganisms.

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Section: Discussionmentioning

confidence: 78%

Plant species, temperature, and bedrock affect net methane flux out of grassland and forest soils

2016

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“…Lignocellulosic biomass refers to large quantities of inexhaustible source of organic matter mainly composed of cellulose (40–50%), hemicellulose (20–30%), and lignin (5–30%) with a worldwide production of 10–50 billion tons per annum, accounting for about half of the global biomass yield . Lignin is a type of aromatic polymer, which is difficult to be hydrolyzed.…”

Section: Introductionmentioning

confidence: 99%

“…It could be a valuable feed stock for biogas production. However, SS has a low C/N ratio, when it is in AD, ammonia may accumulate making toxic condition, which could lead to low biogas yields . SS could be co‐digested with RS to balance the C/N ratio and dilute inhibitors compounds, thus improving biogas yields.…”

Section: Introductionmentioning

confidence: 99%

Anaerobic co‐digestion of rice straw and soybean straw to increase biogas production by pretreatment with trichoderma reesei RUT C30

Deng

Dai

et al. 2017

Env Prog and Sustain Energy

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This study aim to enhance biogas production for the co‐digestion of rice straw and soybean straw (RSS), pretreatment of fermentation materials by Trichoderma reesei RUT C30 were investigated. The pretreatments were done at 30°C for 72 h, and anaerobic digestion for 5 weeks. The results showed that the cumulative biogas yield from pretreatment co‐digestion group RSS (214.1 NmL/g TSsubstrate) was 318% higher than the untreated group CG RSS (51.2 NmL/g TSsubstrate). The cumulative methane yield from RSS was 94.3 NmL CH4/g TSsubstrate, which was 807% higher than that of untreated group (CG RSS 10.4 NmL CH4/g TSsubstrate), and 90% of potential biogas generation was reached in 17 days, which was 39% shorter than that of pretreatment mono‐digestion groups (28 days). These results suggested that rice and soybean straw co‐digestion exhibits a positive synergistic effect and Trichoderma reesei RUT C30 provides an effective method for improving biogas production. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 1050–1057, 2018

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“…Parthiba Karthikeyan et al [48] found that biological pretreatments are not yet available for food wastes and demand urgent need for further research. Increased cellulase and dehydrogenase activity compared to control More than 2-fold increase in methane production [84] 1 wrf: white rot fungi; brf: brown rot fungi; srf: soft rot fungi; 2 a: incubation period, b: incubation temperature, c: moisture content in %, d: humidity in %; 3 inoculation with e: submerged fungal culture, f: fungal spores, g: autoclaved substrate overgrown by fungal mycelia; autoc: autoclaved substrate, orig: original, unmodified substrate; 4 batch: batch system, cont: continuous system, ssAD: solid-state anaerobic digestion, mp: mesophilic conditions, tp: thermophilic conditions, t: anaerobic incubation period or hydraulic retention time in days; 5 according to Klein and Eveleigh [90].…”

Section: Aerobic Pretreatment With Defined Fungal Culturesmentioning

confidence: 94%

“…Yard trimmings were subjected to a pretreatment using the white rot Ceriporiopsis subvermispora [83]; the enhanced methane production was attributed to an increased delignification by the fungus. Mutschlechner et al [84] inoculated a similar substrate containing high portions of grass and tree cut with Trichoderma viride and could secure increased methane production. This organism was also used to pretreat raw bio-waste with a positive effect on the methane production potential of the substrate [85].…”

Section: Aerobic Pretreatment With Defined Fungal Culturesmentioning

confidence: 99%

Biological Pretreatment Strategies for Second-Generation Lignocellulosic Resources to Enhance Biogas Production

et al. 2018

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With regard to social and environmental sustainability, second-generation biofuel and biogas production from lignocellulosic material provides considerable potential, since lignocellulose represents an inexhaustible, ubiquitous natural resource, and is therefore one important step towards independence from fossil fuel combustion. However, the highly heterogeneous structure and recalcitrant nature of lignocellulose restricts its commercial utilization in biogas plants. Improvements therefore rely on effective pretreatment methods to overcome structural impediments, thus facilitating the accessibility and digestibility of (ligno)cellulosic substrates during anaerobic digestion. While chemical and physical pretreatment strategies exhibit inherent drawbacks including the formation of inhibitory products, biological pretreatment is increasingly being advocated as an environmentally friendly process with low energy input, low disposal costs, and milder operating conditions. Nevertheless, the promising potential of biological pretreatment techniques is not yet fully exploited. Hence, we intended to provide a detailed insight into currently applied pretreatment techniques, with a special focus on biological ones for downstream processing of lignocellulosic biomass in anaerobic digestion.

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Biological pre-treatment: Enhancing biogas production using the highly cellulolytic fungus Trichoderma viride

Cited by 63 publications

References 33 publications

Plant species, temperature, and bedrock affect net methane flux out of grassland and forest soils

Plant species, temperature, and bedrock affect net methane flux out of grassland and forest soils

Anaerobic co‐digestion of rice straw and soybean straw to increase biogas production by pretreatment with trichoderma reesei RUT C30

Biological Pretreatment Strategies for Second-Generation Lignocellulosic Resources to Enhance Biogas Production

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