Comparison of Seven Chemical Pretreatments of Corn Straw for Improving Methane Yield by Anaerobic Digestion

Song, Zilin; GaiheYang,; Liu, Xiaofeng; Yan, Zhiying; Yuan, Y.; Liao, Yinzhang

doi:10.1371/journal.pone.0093801

Cited by 161 publications

(123 citation statements)

References 38 publications

(49 reference statements)

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“…Because they are abundant in renewable biomass with low treatment costs, they are broadly employed for methane production in recent years [2]. Anaerobic digestion of lignocellulosic biomass for methane production is usually used for its simultaneous recovery of methane as a renewable energy source and residual solids or liquid as green fertilizers [3,4]. However, lignocellulose solubilization is the rate-limiting step for methane production during anaerobic digestion [5,6], and microorganisms with high efficiency of lignocellulose degradation are highly important for improving the performance of anaerobic digestion.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Microbial Communities in Rumen Fluid Inoculated Reactors for the Biogas Digestion of Wheat Straw

Zhu

Zhang

et al. 2017

Sustainability

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Abstract:The present study investigated the effect of rumen fluid (RF) concentration on the methane production through anaerobic digestion of wheat straw in batch mode, and compared the microbial communities in RF and RF inoculated reactors by 16S rRNA genes sequencing. Six levels of RF concentration including 1%, 5%, 10%, 15%, 20% and 25% (v/v) were used in reactors R1, R5, R10, R15, R20 and R25 respectively. The results revealed that lower than or equal to 5% RF concentrations resulted in reactor acidification and low methane production. The highest methane yield of 106 mL·CH 4 · g·VS −1 was achieved in R10, whereas higher RF concentrations than 10% could not improve the methane production significantly. Methanosarcina barkeri was abundant in the well-working reactors, and Methanobacterium was dominant in the poor-working reactors, implying the archaeal communities in reactors had changed greatly from the Methanobrevibacter-dominated RF. Although the relative abundance of Clostridium and Ruminococcus were greatly different between RF and reactors, the Bacteroidetes and Firmicutes communities were dominant in all the tested samples. The results indicated that the in vitro anaerobic conditions had altered the rumen methanogenic communities significantly and the facultative acetoclastic Methanosarcina was important for the methane production in the RF seeded reactors.

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Section: Introductionmentioning

confidence: 99%

Characterization of the Microbial Communities in Rumen Fluid Inoculated Reactors for the Biogas Digestion of Wheat Straw

Zhu

Zhang

et al. 2017

Sustainability

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“…Patil et al (2016) reported on the twofold methane yield increase as an effect of combined physical-chemical pretreatment (alkaline-hydrodynamic cavitation) of wheat straw basic material. Song et al (2014) investigated the effect of various acidic and alkaline pretreatments of wheat straw on the methane yield. According to their results, yield was improved from 100.6 ml/g VS (from untreated basic material) to 216.7 ml/g VS (optimum pretreated basic material).…”

Section: Introductionmentioning

confidence: 99%

Utilization of Oak (Quercus petreae (Matt.) Liebl.) Bark for Anaerobic Digested Biogas Production

Makk¹,

Rétfalvi²,

Hofmann³

2017

Acta Silvatica Et Lignaria Hungarica

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-Fossil fuel depletion has led to an increasing number of research studies and applications focusing on renewable energy, such as different types of biomass. Lignocellulosic biomass represents an abundant source of biomass suitable for energy production in various forms. The present research investigates the application possibility of pedunculate oak bark (Quercus petrea (Matt.) Liebl.) for the production of biogas via anaerobic digestion. This research has significant novelty, as only a few examples on the utilization of tree bark wastes for the production of biogas can be found in the scientific literature. One of the key factors of increasing biogas yield is the efficient hydrolysis of the basic material, which is achieved by different pretreatment methods. In this study, oak bark was pretreated by microwave energy, by extraction, and by the combination of these two methods. The semi-continuous thermophylic anaerobic digestion of untreated oak bark resulted a 76.3 ml/g volatile solid specific methane yield over a 50-day period, which was not significantly lower than methane yield gained from pretreated basic material. Results indicated that oak bark is suitable for the production of biogas even without the application of the investigated pretreatment techniques. As extraction of oak bark does not impair biogas production, the complex biorefinery utilization of oak bark in the form of extraction bark polyphenols and the subsequent anaerobic fermentation of lignocellulosic residue can be accomplished in the future. lignocelluloses / biorefinery / forestry by-products / renewable energiesKivonat -A kocsánytalan tölgy (Quercus petreae (Matt.) Liebl.) kéreg alkalmazhatósága anaerob úton előállítható biogáz termelés céljára. A fosszilis energiahordozók kimerülése miatt számos alkalmazási terület és kutatás összpontosít a megújuló energiaforrásokra. A lignocellulózok, mint biomassza alapú energiahordozók kutatása releváns téma, mivel nagy mennyiségben állnak rendelkezésre. Ezen kutatás a kocsánytalan tölgy (Quercus petreae (Matt.) Liebl.) kéreg alkalmazási lehetőségeit vizsgálja az anaerob úton előállítható biogáz termelés céljára. A kéreg hulladék effajta felhasználásával foglalkozó szakirodalmak száma szegényes. A lignocellulózok esetében kulcs fontosságú eljárás az alapanyag hidrolízise a biogázhozam, ezzel együtt a metánhozam növelése érdekében. A tölgy kéreg alapanyag előkezelése mikrohullámmal, extrakcióval és együttes alkalmazásukkal történt. A kezeletlen tölgy kéreg 50 napos, félfolyamatos, termofil anaerob fermentáció során 76.3 ml/g szerves szárazanyag fajlagos metánhozam érhető el, ami szignifikánsan nem alacsonyabb a kezelthez képest. Az eredmények alapján a tölgy kéreg, alkalmas metán előállításra előkezelési eljárások nélkül is. Mivel a kéreg extrakciója nem rontja a biogáz termelés hatékonyságát, ezért a kéreg melléktermék komplex kémiai hasznosítása, az extrakt anyagok kivonása valamint a visszamaradt lignocellulóz vázanyag anaerob fermentációja által a jövőben lehetséges. lignocellulózok / ...

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“…Oji et al (2007) on the composition change of corn stalk after ammoniation pretreatment showed that ammoniation pretreatment could effectively increase the nitrogen content of corn stalk and reduce its cellulose and hemicellulose contents. Ammonia pretreatment significantly improved cumulative biogas yield, biogas production rate, and volatile solid (VS) reduction of straw (Song et al 2012;Li et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Effects of Ammoniation Pretreatment at Low Moisture Content on Anaerobic Digestion Performance of Rice Straw

Yuan¹,

Zhang²,

Li³

et al. 2014

BioResources

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The effect of ammonia pretreatment on the anaerobic digestion performance of rice straw was investigated. The rice straw was pretreated with four different moisture contents (30%, 50%, 70%, and 90%) and three concentrations of ammonia (2%, 4%, and 6%). The results showed that the anaerobic digestion achieved best performance for the rice straw pretreated by ammonia concentration of 4% and moisture content of 70%, and biogas yield achieved the highest value (396.92 mL·g -1 total solid), which was 21.9% higher than that of the untreated rice straw. Higher moisture was recommended as it could increase system stability, shorten anaerobic digestion time, and increase biogas production. The composition analyses indicated that ammonia pretreatment could effectively destroy the chemical structure of lignocellulose, and partially decompose cellulose, hemicellulose, and lignin. Cellulose and hemicellulose were converted by 79.2% and 63.2%, respectively, at optimal ammonia amount and moisture content. The ammonia pretreatment proved to be a simple and effective methods to improve the anaerobic digestion performance of rice straw.

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Comparison of Seven Chemical Pretreatments of Corn Straw for Improving Methane Yield by Anaerobic Digestion

Cited by 161 publications

References 38 publications

Characterization of the Microbial Communities in Rumen Fluid Inoculated Reactors for the Biogas Digestion of Wheat Straw

Characterization of the Microbial Communities in Rumen Fluid Inoculated Reactors for the Biogas Digestion of Wheat Straw

Utilization of Oak (Quercus petreae (Matt.) Liebl.) Bark for Anaerobic Digested Biogas Production

Effects of Ammoniation Pretreatment at Low Moisture Content on Anaerobic Digestion Performance of Rice Straw

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