Synergistic effect of alkaline pretreatment and Fe dosing on batch anaerobic digestion of maize straw

Khatri, Shailendra; Wu, Shubiao; Kizito, Simon; Zhang, Wanqin; Li, Jiaxi; Dong, Renjie

doi:10.1016/j.apenergy.2015.08.045

Cited by 97 publications

(21 citation statements)

References 40 publications

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“…Several studies have shown that the co-digestion of maize straw (MS) with animal waste is an effective method of managing MS (Dinuccio et al 2010;Wang et al 2012b;Yangin-Gomec and Ozturk 2013;Arici and Koçar 2015;Zou et al 2016). However, the efficiency of integrating maize straw biomass into biogas production is very limited due to the resistance of its complex lignin structure to hydrolysis by bacteria (Jin et al 2014;Khatri et al 2015). Additionally, previous studies have mainly focused on silage MS, which is easier to degrade than DMS (TS, about 10% to 15%).…”

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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“…In this period both reactors showed process stability in terms of pH and VFA/TIC ratio (Fig. Likewise, Khatri et al [2] performed Fe dosing from range 50 to 2000 mg L −1 with maize straw and obtained the highest methane yield of 350.2 mL CH 4 g −1 VS at 1000 mg L −1 , with a 16.5% increase respect to straw untreated. On day 61 (Phase III), mineral was supplied once a week during 28 days (Fig.…”

Section: Effect Of Mineral Dosage Strategies On Semi-continuous Anaermentioning

confidence: 76%

“…For instance, Liu et al [18] reported that the combination of Fe, Ni and Co in 1.0, 0.4, and 0.4 mg L −1 , respectively, attained methane yield of 243 mL CH 4 g −1 VS, which was 62% higher than with untreated corn stover. Likewise, Khatri et al [2] performed Fe dosing from range 50 to 2000 mg L −1 with maize straw and obtained the highest methane yield of 350.2 mL CH 4 g −1 VS at 1000 mg L −1 , with a 16.5% increase respect to straw untreated. This high methane yield could be due to the lower content of lignin (3.82% TS) in the maize straw and thus easier microbial degradation of the holocellulose compared to content of lignin of the straw used in this study (17.9% TS).…”

Section: Effect Of Mineral Dosage Strategies On Semi-continuous Anaermentioning

confidence: 99%

“…The use of energy crops alone as the feedstock for biogas production has been previously studied [1][2][3][4][5]. However, anaerobic digestion (AD) of these biomass has mainly been limited by its slow hydrolysis [4], which is attributed to the complex and Correspondence: Aimee González-Suárez (aimee@quimica.cujae.…”

Section: Introductionmentioning

confidence: 99%

“…Different pre-treatment studies have been addressed toward an improvement of the anaerobic biodegradability of crop residues [2,6,9]. Others research on trace elements supplementation in mono-digestion of straw and silage with the goal to enhance the performance and stability of the process [2,3,5]. From the mentioned studies, a clear stimulating effect on methane yield has been reported to be ranging from 350 to 429 mL CH 4 g −1 VS, which were 15 to 36% higher than that of the substrates without trace metal supply, when using Fe-Ni-Co-Mo, individually or in combination.…”

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confidence: 99%

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Bioavailability and dosing strategies of mineral in anaerobic mono‐digestion of maize straw

González-Suárez

Reyes

Oliva-Merencio

et al. 2018

Engineering in Life Sciences

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The influence of the bonding form distribution of Fe, Ni, Co and Mn and their potential bioavailability during the anaerobic degradation of maize straw was investigated. Two reactors were operated over 117 days at 37°C and different dosage strategies of mineral were studied in reactor (R2). Control reactor (R1) was metal‐limited over time. mineral supplementation (1 g L−1) once a week reported the highest methane yield (257 mL g−1 VS) with 30% of increment. Ni and Co predominated in their oxidizable bonding forms and Fe mainly existed as residual and oxidizable fractions. The potential bioavailability (Mn ˃˃ Co ≈ Ni ˃ Fe) of R2 was higher comparing to R1. Metal deprivation in R1 led to depletion of both sequential extraction fractions and total metal concentrations until the end of the process. This study confirmed that the dosage strategy of mineral has a stimulatory effect on methane production from crop maize waste.

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