Alkaline pretreatment for enhancement of biogas production from banana stem and swine manure by anaerobic codigestion

Zhang, Chengming; Li, Jihong; Liu, Chen; Liu, Xiaoling; Wang, Jianlong; Li, Shizhong; Fan, Guifang; Zhang, Lei

doi:10.1016/j.biortech.2013.09.070

Cited by 82 publications

(42 citation statements)

References 22 publications

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“…Some substrates characterized by high C/N ratio are often used to mix with PM to achieve a low ammonia content and proper C/N ratio (Okeh et al 2014;Wang et al 2015). In addition, co-digestion facilitates the acquisition of a high level of organic matter, as well as provides missing nutrients to the microorganisms, which could result in high biogas yield (Zhang et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Anaerobic Co-digestion of Pig Manure with Dried Maize Straw

et al. 2016

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The anaerobic co-digestion of pig manure (PM) with dried maize straw (DMS) was studied at 35 °C with a volatile solid (VS) ratio (VSPM/VSDMS) of 1:2 in a continuously stirred tank reactor, and the digestions of mono-PM and mono-DMS were evaluated under the same conditions. The organic loading rates (OLRs) of 2, 3, and 4 g VS/L/d were studied and found to correspond to hydraulic retention times (HRTs) of 60, 40, and 30 d, respectively. Under the condition of long HRT and low OLR, PM could be degraded completely. The co-digestion of PM with DMS showed the most stable performance in TAN, whereas TAN in mono-PM increased with the increase of OLR. The specific methane yield (SMY) did not have a linear correlation with OLR, since HRT changed with different OLR. The maximum average SMY in the co-digestion reactor was 272 mL/g VS-fed at an OLR of 3 g VS/L/d and an HRT of 40 d. The SMY in mono-DMS digestion was the lowest and it decreased with the increase of OLR.

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Section: Introductionmentioning

confidence: 99%

Anaerobic Co-digestion of Pig Manure with Dried Maize Straw

et al. 2016

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“…However, low methane yield and poor substrate degradation rate are frequently reported when lignocellulosic biomasses are used as feedstock [6]. The recalcitrant structure of lignocellulosic wastes often requires suitable treatment to change its chemical and physical property in order to improve the biodegradability for enhanced methane production and substrate utilization [7].…”

Section: Introductionmentioning

confidence: 99%

“…The recalcitrant structure of lignocellulosic wastes often requires suitable treatment to change its chemical and physical property in order to improve the biodegradability for enhanced methane production and substrate utilization [7]. In order to increase the rate of hydrolysis and optimize the biological conversion, physical, chemical, and biological pretreatments are often implemented, e.g., milling/grinding, acid or alkali treatment, and the addition of enzymes and microorganisms [6,[8][9][10]. Mechanical size reduction for banana stems could increase the rate of degradation and the methane yield by increasing the surface area of the substrates for an efficient enzymatic or microbial attack.…”

Section: Introductionmentioning

confidence: 99%

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Fresh banana pseudo-stems as a tropical lignocellulosic feedstock for methane production

Liu

Nges

et al. 2016

Energ Sustain Soc

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Background: The banana pseudo-stem is a low-lignin-content lignocellulosic biomass that can be used for methane production. In recent years, anaerobic digestion (AD) of dried banana stems for methane production has attracted considerable attention. However, there is limited information regarding methane production from the fresh banana pseudo-stem. The direct usability of fresh banana stems as a resource for renewable energy production through AD is a called upon prerequisite for an improved waste management system culminating in a sustainable as well as socioeconomic development of local banana-producing communities. Methods: In this study, three series of experiments were performed simultaneously to investigate the methane production from fresh banana pseudo-stems for the first time. The tests included size reduction, enzyme addition, and co-digestion of banana stems with cow manure.

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“…They represent a unique perennial single-harvest crop and are one of the largest herbaceous plants in the world (Ploetz et al 2007). Banana stems are the main by-product after banana harvesting, with about 100 metric tons per hectare being produced annually (Zhang et al 2013); this waste is usually crushed and left to degrade on the farms to replenish some of the nutrients in the soil (Padam et al 2014). However, this disposal method generates a large amount of greenhouse gases and unpleasant odors (Pei et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Alkaline Pretreatment of Banana Stems for Methane Generation: Effects of Temperature and Physicochemical Changes

et al. 2017

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The effects of NaOH pretreatment temperature on the physicochemical characteristics and methane production of anaerobically digested banana stems were investigated in this paper. With the increase of pretreatment temperature from 0 °C to 100 °C, the chemical oxygen demand (COD) of the soak liquid in the treated biomass approximately linearly increased from 5.9 g/L for the untreated stems to 34.0 g/L. A weight loss of 5.1% was observed for the untreated material, while it was up to 31.2% for the sample treated at 100 °C. The removal of lignin and hemicellulose accounted for the majority of the weight loss. The removal rates of lignin and hemicellulose increased from 15.0% to 41.6% and 1.9% to 23.6% when the treatment temperature increased from 0 °C to 100 °C, respectively. Moreover, the crystalline index (CI) of the banana stems also increased with rising temperature, resulting from the dissolution of amorphous cellulose with increasingly harsher alkaline environments. The optimal pretreatment temperature for banana stems was confirmed at 50 °C. In these conditions, methane was produced via anaerobic digestion with 239.9 mL/g total solid (TS) yield, which represented an increase of 66.7% over untreated banana stems.

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Alkaline pretreatment for enhancement of biogas production from banana stem and swine manure by anaerobic codigestion

Cited by 82 publications

References 22 publications

Anaerobic Co-digestion of Pig Manure with Dried Maize Straw

Anaerobic Co-digestion of Pig Manure with Dried Maize Straw

Fresh banana pseudo-stems as a tropical lignocellulosic feedstock for methane production

Alkaline Pretreatment of Banana Stems for Methane Generation: Effects of Temperature and Physicochemical Changes

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