Anaerobic Digestion Process for the Production of Biogas from Cassava and Sewage Treatment Plant Sludge in Brazil

Silva, Sérgio Peres Ramos da; Monteiro, Marina Rebeca Silva; Ferreira, Micheline Lima; Nascimento, Adalberto Freire do; Palha, Maria de Los Angeles Perez Fernandez

doi:10.1007/s12155-018-9942-z

Cited by 34 publications

(14 citation statements)

References 14 publications

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“…The substrate mixture containing CW + ZEO-HC showed the highest VS and COD reductions during digestion (66% and 49%), which corresponded with the highest cumulative CH 4 production ( Table 2). Similar trends were reported in previous work [18,29]. Jiraprasertwong et al used cassava wastewater in a three-stage up flow anaerobic sludge blanket (UASB) reactor and showed a steady reduction in COD removal with increasing COD loading and an increasing biogas production up to 15 kg COD/m 3 d (one reactor) and 10 kg/m 3 d (two reactors) [18].…”

Section: Volatile Solids and Cod Reduction During Digestionsupporting

confidence: 85%

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Enhanced Biogas Production of Cassava Wastewater Using Zeolite and Biochar Additives and Manure Co-Digestion

2020

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Currently, there are challenges with proper disposal of cassava processing wastewater, and a need for sustainable energy in the cassava industry. This study investigated the impact of co-digestion of cassava wastewater (CW) with livestock manure (poultry litter (PL) and dairy manure (DM)), and porous adsorbents (biochar (B-Char) and zeolite (ZEO)) on energy production and treatment efficiency. Batch anaerobic digestion experiments were conducted, with 16 treatments of CW combined with manure and/or porous adsorbents using triplicate reactors for 48 days. The results showed that CW combined with ZEO (3 g/g total solids (TS)) produced the highest cumulative CH4 (653 mL CH4/g VS), while CW:PL (1:1) produced the most CH4 on a mass basis (17.9 mL CH4/g substrate). The largest reduction in lag phase was observed in the mixture containing CW (1:1), PL (1:1), and B-Char (3 g/g TS), yielding 400 mL CH4/g volatile solids (VS) after 15 days of digestion, which was 84.8% of the total cumulative CH4 from the 48-day trial. Co-digesting CW with ZEO, B-Char, or PL provided the necessary buffer needed for digestion of CW, which improved the process stability and resulted in a significant reduction in chemical oxygen demand (COD). Co-digestion could provide a sustainable strategy for treating and valorizing CW. Scale-up calculations showed that a CW input of 1000–2000 L/d co-digested with PL (1:1) could produce 9403 m3 CH4/yr using a 50 m3 digester, equivalent to 373,327 MJ/yr or 24.9 tons of firewood/year. This system would have a profit of $5642/yr and a $47,805 net present value.

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Section: Volatile Solids and Cod Reduction During Digestionsupporting

confidence: 85%

“…The pH of the CW substrate was between 5.5 and 6.5 ( Table 2). Some studies have reported lower pH values for CW, ranging from 3.9-4.5 [29]. The pH of mixed substrates before and after AD was within the ideal pH range (6.5-8) for CH 4 production [30].…”

Section: Characterization Of Substrate and Inoculummentioning

confidence: 80%

Enhanced Biogas Production of Cassava Wastewater Using Zeolite and Biochar Additives and Manure Co-Digestion

2020

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“…Anaerobic stabilization is probably one of the most promising technologies for processing organic waste into bioenergy, including methane rich biogas and fertilizer products [1,2]. In New Zealand, anaerobic stabilization is considered to be the most attractive waste management solution due to its environmental and economic benefits [3].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Potential Exposure to Components of Municipal Solid Waste in a Mechanical Biological Treatment

Wiśniewska

2020

The 9th Innovations-Sustainability-Modernity-Openness Conference (ISMO’20)

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Municipal waste treatment plants are a special kind of municipal facility, which, in addition to the benefits of waste management, are also an important source of energy from the biogas captured. However, the processes and unit operations carried out at waste management plants are associated with the emission of dust and chemical compounds. This paper presents the results of research aimed at analyzing indoor air conditions at a biogas plant having an installation for mechanical-biological waste treatment in places where employees work. Tests include measuring the respirable and non-respirable dust fractions and measuring volatile organic compounds (VOCs) and ammonia (NH3).

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“…[ 6–8 ] In Brazil in particular, there are many studies related to the production of biogas using cassava wastewater (manipueira) as a substrate, due to the wide production and consumption of this commodity in the country. [ 9–11 ]…”

Section: Introductionmentioning

confidence: 99%

Optimum Co‐Digestion Ratio of Cattle Manure and Manipueira in a Single‐Stage Anaerobic Digester for Biogas Production

Madeira

Oliveira

Araújo

et al. 2020

CLEAN Soil Air Water

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Several studies have shown that it is necessary to use a two-stage anaerobic reactor in biogas production with manipueira as a substrate. The objective of this study is to show the possibility of producing good quality biogas from a single-stage anaerobic reactor using manipueira and cattle manure as substrates. Five scenarios of codigestion are simulated in five digesters with different manipueira/manure ratios. The only digester that has a good result is the digester that is fed with 75% of manipueira and 25% of cattle manure. Under these conditions, biogas is produced with an average methane concentration of 62% the hydraulic retention time of the codigestion process is 30 days. The other digesters show that an excess of manipueira acidifies the codigestion process; such acidification can result in the severe inhibition of methanogenesis because of the accumulation of volatile fatty acids. On the other hand, an excess of cattle manure results in mixtures with a high concentration of lignin, cellulose, and hemicellulose mixtures, which, negatively influences the growth rate of methanogenic bacteria. Thus, using manipueira as cosubstrate, it is possible to produce a high-quality biogas in a single-stage anaerobic reactor.

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Anaerobic Digestion Process for the Production of Biogas from Cassava and Sewage Treatment Plant Sludge in Brazil

Cited by 34 publications

References 14 publications

Enhanced Biogas Production of Cassava Wastewater Using Zeolite and Biochar Additives and Manure Co-Digestion

Enhanced Biogas Production of Cassava Wastewater Using Zeolite and Biochar Additives and Manure Co-Digestion

Analysis of Potential Exposure to Components of Municipal Solid Waste in a Mechanical Biological Treatment

Optimum Co‐Digestion Ratio of Cattle Manure and Manipueira in a Single‐Stage Anaerobic Digester for Biogas Production

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