Effect of organic loading rate on anaerobic digestion of pig manure: Methane production, mass flow, reactor scale and heating scenarios

Duan, Na; Zhang, Duojiao; Lin, Cong; Zhang, Yifeng; Zhao, Lingying; Liu, Hongbin; Liu, Zhidan

doi:10.1016/j.jenvman.2018.10.062

Cited by 75 publications

(27 citation statements)

References 36 publications

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“…It is important to observe the operational differences of each reactor configuration, such as the HRT, applied OLR, and TS composition in the substrate. Duan et al, (2019) 1.9 5.0 4.2 22 1.1 0.6 72 Sun et al, (2019) 3.0 9.1 4.5 28 1.2 -64 Kafle et al, (2012) 1.1 5.2 3.6 32 0.5 0.5 72 UASB REACTOR Present study 2.2 0.8 0.4 2.0 1.6 0.7 73 Pacco et al, (2018) ---≈ 3.0 0.9 -≈ 75 Bergland et al, (2015) ≈3.6 1.4 0.7 1.8 --- Bortoli et al, (2009) 2.8 0.4 0.3 1.0 1.4 1.6 75 Units of measurement: OLR (gVS add L -1 reactor d -1 ); BP (LN biogas L -1 reactor d -1 ); BY (LN biogas gVS add -1 ).…”

Section: By and Bp In The Cstrmentioning

confidence: 99%

Biogas Yield and Productiveness of Swine Manure for Different Reactor Configurations

et al. 2020

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The progression of the organic loading rate (OLR) up to a certain limit increases biogas production. The limit and operation range vary according to the configuration of the reactor and are associated with other variables that generate different results with respect to biogas yield (BY) and biogas productiveness (BP). The aim of this study was to investigate the effect of the OLR on the BY and BP from swine manure in continuous stirred tank reactors (CSTRs) and upflow anaerobic sludge blanket reactors (UASBs). In the assay with the CSTR, the best operational condition was at an OLR of 0.7 gVS add L −1 reactor d −1 and a hydraulic retention time (HRT) of 18 days. At this operational condition, 0.8 LN biogas gVS add −1 of BY and 0.6 LN biogas L −1 reactor d −1 of BP were obtained. In the assay with the UASB, the best operational condition was at an OLR of 2.2 gVS add L −1 reactor d −1 and an HRT of two days, and 0.7 LN biogas gvs add −1 of BY and 1.6 LN biogas L −1 reactor d −1 of BP were obtained. The results demonstrate the effects of OLR changes on the biogas production in the CSTR and UASB, avoiding the underutilization or overloading of such equipment and enabling collaboration in projects for power generation from biogas in swine farms.

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Section: By and Bp In The Cstrmentioning

confidence: 99%

Biogas Yield and Productiveness of Swine Manure for Different Reactor Configurations

et al. 2020

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“…Various studies indicate that FC has a detrimental effect on the AD process and the subsequent methane recovery process [49][50][51]. Moreover, the higher protein, lipid, and long-chain free fatty acid concentration present in the JPC could also inhibit the activity of microbes in the digester unless the steady-state condition is maintained.…”

Section: Impact Of Feedstock Concentration and Cg Level On Bmp Of Jpcmentioning

confidence: 99%

Alkaline and co-digestion pretreatments: process optimization for enhancing the methane yield of Jatropha press cake

Ewunie

Morken

Yigezu

2020

Biomass Conv. Bioref.

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Oil extraction and biodiesel production process produce a massive amount of by-products like Jatropha press cake (JPC) and crude glycerol (CG), which could be used as a potential substrate for methane production. However, the higher lignocellulosic and nitrogen content in the JPC act as a recalcitrant and inhibitor, respectivly, for microbes that are involved in the anaerobic digestion (AD) process. Therefore, the present study aimed to enhance the methane yield of JPC by optimizing the alkaline pretreatment and co-digestion process conditions. The effects of NaOH concentration, incubation temperature, and retention time on methane and soluble chemical oxygen demand (sCOD) yields were evaluated and modeled by employing a response surface methodology coupled with central composite design (RSM-CCD). Moreover, a series of batch experiments with various feedstock concentrations (FCs) were tested to investigate the methane yield of JPC when co-digested with CG at different levels. The methane yields of all pretreated samples were significantly higher when compared with these of the untreated JPC. Pretreating the JPC using 7.32% NaOH at 35.86 °C for 54.05 h was the optimum conditions for maximum methane increment of 40.23% (353.90 mL g−1 VS), while co-digesting 2% CG with JPC at 2 g VS L−1 FC enhanced the methane yield by 28.9% (325.47 mL g−1 VS). Thus, the methane yield of JPC was effectively increased by alkaline pretreatment and co-digesting with CG. However, the alkaline pretreatment was relatively more effective compared with the co-digestion process.

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“…(2016) (i.e., 1.39–2.54 g CH 4 kg −1 VS d −1 for emissions from swine slurry pits). Other researchers have also reported a quadratic response for CH 4 production rates and solids in swine manure (Andersen et al., 2015; Coates et al., 1996; Du et al., 2014; Duan et al., 2019; Meng et al., 2018; Yang et al., 2016). Low CH 4 production in dilute or low solids manure is attributed to low substrate availability (Hashimoto, 1984), whereas in manures with higher solids content NH 3 toxicity has been cited for inhibiting CH 4 production rates (Hansen et al., 1998; Meng et al., 2018; Nielsen & Angelidaki, 2008).…”

Section: Resultsmentioning

confidence: 91%

“…Among treatment technologies, reducing solids in manure pits is often considered to be a major goal (Riano & Garcia‐Gonzalez, 2014; Szogi et al., 2017). Swine farms in South Korea that failed to remove solids from the pits before adding diluent experienced instability in aerobic and anaerobic manure treatment due to overloading of organic materials (Duan et al., 2019; Yang et al., 2016). The performance of aerobic biological processes has been reduced with high organic matter loading and poor digestion of effluent (Westerman, Bicudo, & Kantardjieff, 2000).…”

Section: Resultsmentioning

confidence: 99%

“…Curve fit P values: total OAV, quadratic <.01; ammonia (NH 3 ), quadratic <.01; straight chain fatty acids (SCFA), quadratic, = .05; branched chain fatty acids (BCFAs), quadratic = .04; total phenols, quadratic < .01; total indoles, quadratic = .01. emission rates ranged from 0.47 to 3.79 g CH 4 kg −1 VS d −1 (assumes C content of 50-60% for volatile solids), which was in line with rates reported by Petersen et al (2016) (i.e., 1.39-2.54 g CH 4 kg −1 VS d −1 for emissions from swine slurry pits). Other researchers have also reported a quadratic response for CH 4 production rates and solids in swine manure (Andersen et al, 2015;Coates et al, 1996;Du et al, 2014;Duan et al, 2019;Meng et al, 2018;. Low CH 4 production in dilute or low solids manure is attributed to low substrate availability (Hashimoto, 1984), whereas in manures with higher solids content NH 3 toxicity has been cited for inhibiting CH 4 production rates (Hansen et al, 1998;Meng et al, 2018;Nielsen & Angelidaki, 2008).…”

Section: Manure Degradationmentioning

confidence: 97%

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Swine manure dilution with lagoon effluent impact on odor reduction and manure digestion

et al. 2021

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Manure management systems have a major impact on odor from swine operations. A study was conducted to compare deep-pit manure management systems to flushing barn manure management systems for odor reduction and organic matter degradation. Bioreactors were used to mimic manure management systems in which manure and lagoon effluent were loaded initially, and subsequent manure was added daily at 5% of its storage capacity (1 L). Final manure-to-lagoon effluent ratios were 10:0 (deep-pit manure management system), 7:3 (Korean flushing systems), 5:5 (enhanced flushing systems), and 2:8 (enhanced flushing systems). At the end of the trial, at 4 (2:8), 10 (5:5), or 14 (10:0, 7:3) d, manure and gas concentrations of odorants were measured, including total solids (TS), total N (TN), and total C (TC) of manure. Odor was evaluated using the odor activity values (OAVs), and regression analysis was used to determine the effects of dilution and TS on manure properties and OAVs. Solids in the manure were positively correlated to TN, TC, straight chain fatty acids (SCFAs), branch chain fatty acids (BCFAs), total phenols, and total indoles and positively correlated to OAV for SCFAs, BCFAs, ammonia, total phenols, and total indoles. Reducing TS by 90% reduced BCFA, ammonia, phenols, and indoles by equal amounts in air. Carbon dioxide was the main C source evolved, averaging over 90%, and CH 4 increased with dilution quadratically. Overall, reducing solids in manure by dilution had the biggest impact on reducing odor and increasing organic C degradation. 1 INTRODUCTION The United States is the third leading producer of swine in the world, behind China and the European Union, with over 77 million hogs in production (USDA Foreign Agriculture Services, 2020) generating over 26 billion dollars in revenue and representing 6.8% of all agricultural revenue (USDA National Agricultural Statistical Services, 2019). In Iowa, the swine

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Effect of organic loading rate on anaerobic digestion of pig manure: Methane production, mass flow, reactor scale and heating scenarios

Cited by 75 publications

References 36 publications

Biogas Yield and Productiveness of Swine Manure for Different Reactor Configurations

Biogas Yield and Productiveness of Swine Manure for Different Reactor Configurations

Alkaline and co-digestion pretreatments: process optimization for enhancing the methane yield of Jatropha press cake

Swine manure dilution with lagoon effluent impact on odor reduction and manure digestion

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