Laying hen manure in anaerobic Co-Digestion with glycerin containing different glycerol and impurity levels

Schwingel, Alice Watte; Orrico, Ana Carolina Amorim; Lucas, Jorge de; Orrico, Marco Antônio Previdelli; Aspilcueta-Borquis, Rusbel Raúl; Fava, Aldo Felipe

doi:10.1016/j.jclepro.2019.01.125

Cited by 15 publications

(9 citation statements)

References 26 publications

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“…The demand for fuel energy sources and their actual consumption across the globe are increasing drastically [1]. Fossil fuel resources supplied almost 87% of the global energy demand [2]. However, three-fourths of the world's poor households consumed only 10% of the worldwide energy supply [3].…”

Section: Introductionmentioning

confidence: 99%

“…CG can be purified into high grade for various applications in cosmetics and pharmaceuticals. However, the high purification cost hinders its use in such industries and usually considered organic waste [2]. While JPC contains toxic chemicals like phorbol ester and curcin [15], thus, the cake could not be directly used as animal feed or organic fertilizer [16].…”

Section: Introductionmentioning

confidence: 99%

“…Higher nitrogen content may cause inhibition of the methanogenic activities [23] and subsequently leads to process collapse due to the ammonia accumulation [18]. In contrast, CG is very rich in carbon, which means the mono-digestion of CG for biogas production is impossible due to nitrogen deficiency for maintaining the microbial biomass growth [2].…”

Section: Introductionmentioning

confidence: 99%

“…Pretreating the JPC using proper techniques can improve the anaerobic degradation process by bringing a structural change. The structural change would help the microbes to convert the carbohydrate polymers into simple fermentable sugars [24], whereas, co-digestion could improve the methane yield by optimizing the required C/N ratio [2,25]. Therefore, various techniques such as mechanical [26], thermochemical [24], and steam explosion [27,28] pretreatments were commonly used for pretreating lignocellulosic biomasses.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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“…The batch biodigesters used have been described by SCHWINGEL et al (2019). In this stage, the goal was to evaluate the different C/N ratios (10/1, 13/1, 17/1, and 22/1) for substrates prepared with SM and SP or C additions.…”

Section: Methodsmentioning

confidence: 99%

Anaerobic co-digestion of swine manure with sweet potato or cassava in different C/N ratios

et al. 2020

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Anaerobic co-digestion (AcoD) of waste is a method of increasing methane (CH4) yield and improving biofertilizer quality. This study aimed to evaluate the best AcoD conditions for swine manure (SM) with sweet potato (SP) or cassava (C) in different amounts in semi-continuous biodigesters. Initially, using batch biodigesters, an AcoD test of the SM with SP or C was performed, adopting carbon/nitrogen (C/N) ratios of 10/1, 13/1, 17/1, and 22/1. Based on the results, a C/N ratio of 10/1 was chosen, which was the proportion that resulted in the highest reduction of volatile solids (VS) and specific biogas production. From these results, the experiment was carried out in semi-continuous biodigesters, consisting of three treatments (control (SM), SP 10/1, and C 10/1) with five replicates and a hydraulic retention time (HRT) of 30 days. Total solid (TS) and volatile solid (VS) reductions, biogas and CH4 yields, alkalinity, and volatile acidity were measured. The control treatment differed from the others and resulted in decreased biogas yield (752 LN.kgVSadded -1), CH4 (449 LN.kgVSadded -1), and CH4 content (59.7%). The AcoD treatments (SP and C) did not differ significantly for biogas yield (respectively, 901 and 883 LN.kgVSadded -1) and CH4 (respectively, 590 and 547 LN.kgVSadded -1); however, they differed in CH4 content (65.5% and 61.9% respectively). The treatments showed general reduction averages of 76.1% and 85.9% for TS and VS, respectively, with no statistical difference found between them. The AcoD of the SM with SP or C increased the production and quality of the biogas, increasing the concentration of CH4 therein.

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Technical Trends in Biogas Production from Chicken Manure

Johari

Aqsha

Shamsudin

et al. 2023

Manure Technology and Sustainable Development

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Laying hen manure in anaerobic Co-Digestion with glycerin containing different glycerol and impurity levels

Cited by 15 publications

References 26 publications

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

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

Anaerobic co-digestion of swine manure with sweet potato or cassava in different C/N ratios

Technical Trends in Biogas Production from Chicken Manure

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