Effect of feed to microbe ratios on anaerobic digestion of Chinese cabbage waste under mesophilic and thermophilic conditions: Biogas potential and kinetic study

Kafle, Gopi Krishna; Bhattarai, Sujala; Kim, Sang Hun; Chen, Lide

doi:10.1016/j.jenvman.2013.12.006

Cited by 66 publications

(37 citation statements)

References 33 publications

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“…Fisher's least significant difference (Fisher's LSD) was calculated to judge whether two or more averages were significantly different (Bhattarai et al, 2012;Kafle et al, 2014;Kafle et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Emissions of Odor, Ammonia, Hydrogen Sulfide, and Volatile Organic Compounds from Shallow-Pit Pig Nursery Rooms

Kafle¹,

Chen²

2014

Journal of Biosystems Engineering

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Purpose:The objective of this study was to measure emissions of gases (ammonia (NH3), hydrogen sulfide (H2S) and carbon dioxide (CO2)), volatile organic compounds (VOC) and odor from two shallow pit pig nursery rooms. Gas and odor reduction practices for swine operations based on the literature were also discussed. Methods: This study was conducted for 60 days at a commercial swine nursery facility which consisted of four identical rooms with mechanical ventilations. Two rooms (room 1 (R1) and room 2 (R2)) with different pig numbers and ventilation rates were used in this study. The pig manure from both the R1 and R2 were characterized. Indoor/outdoor temperatures, ventilation rates/duration, NH3, H2S, CO2, and VOC concentrations of the ventilation air were measured periodically (3-5 times/week). Odor concentrations of the ventilations were measured two times on two days. Three different types of gas and odor reduction practices (diet control, chemical method, and biological method) were discussed in this study. Results: The volatile solids to total solids ratio (VS/TS) and crude protein (CP) value of pig manure indicated the pig manure had high potential for gas and odor emissions. The NH3, H2S, CO2 and VOC concentrations were measured in the ranges of 1.0-13.3, 0.1-5.7, 1600-3000 and 0.0-1.83 ppm, respectively. The NH3 concentrations were found significantly higher than H2S concentrations for both rooms. The odor concentrations were measured in the range of 2853-4432 OUE/m 3 . There was significant difference in odor concentrations between the two rooms which was due to difference in pig numbers and ventilation duration. The literature studies showed that simultaneous use of dietary control and biofiltration practices will be more effective and environmentally friendly for gas and odor reductions from pig barns. Conclusions: The gas and odor concentrations measured in the ventilation air from the pig rooms indicate an acute need for using gas and odor mitigation technologies. Adopting diet control and biofiltration practices simultaneously could be the best option for mitigating gas and odor emissions from pig barns.

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Section: Discussionmentioning

confidence: 99%

Emissions of Odor, Ammonia, Hydrogen Sulfide, and Volatile Organic Compounds from Shallow-Pit Pig Nursery Rooms

Kafle¹,

Chen²

2014

Journal of Biosystems Engineering

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“…Anaerobic digestion yields depend on several factors [55,56], including temperature [57][58][59][60], organic loading rate [61][62][63][64] and substrate to inoculum ratio [65][66][67]. Under similar operating conditions, substrate characteristics play a key role in defining the amount of biogas that can be recovered by anaerobic digestion, as the theoretical gas yield varies with substrate composition in terms of carbohydrates, proteins and fats, as given in Table 1.…”

Section: Biogas Productionmentioning

confidence: 99%

Combined Biogas and Bioethanol Production: Opportunities and Challenges for Industrial Application

Cesaro

Belgıorno

2015

Energies

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Abstract:In the last decades the increasing energy requirements along with the need to face the consequences of climate change have driven the search for renewable energy sources, in order to replace as much as possible the use of fossil fuels. In this context biomass has generated great interest as it can be converted into energy via several routes, including fermentation and anaerobic digestion. The former is the most common option to produce ethanol, which has been recognized as one of the leading candidates to substitute a large fraction of the liquid fuels produced from oil. As the economic competitiveness of bioethanol fermentation processes has to be enhanced in order to promote its wider implementation, the most recent trends are directed towards the use of fermentation by-products within anaerobic digestion. The integration of both fermentation and anaerobic digestion, in a biorefinery concept, would allow the production of ethanol along with that of biogas, which can be used to produce heat and electricity, thus improving the overall energy balance. This work aims at reviewing the main studies on the combination of both bioethanol and biogas production processes, in order to highlight the strength and weakness of the integrated treatment for industrial application.

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“…However, the kinetic parameters derived from these reactors differed such that more diluted reactor showed faster reaction kinetics ( Table 3). The higher k value for more diluted FRW would be because of the different initial F/M ratio (Kafle et al, 2014), which meant more biomass with less substrate, faster the substrate consumption rate.…”

Section: Acidogenesis and Methanationmentioning

confidence: 99%

Characterization of food waste-recycling wastewater as biogas feedstock

Shin

Han

Lee

et al. 2015

Bioresource Technology

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Effect of feed to microbe ratios on anaerobic digestion of Chinese cabbage waste under mesophilic and thermophilic conditions: Biogas potential and kinetic study

Cited by 66 publications

References 33 publications

Emissions of Odor, Ammonia, Hydrogen Sulfide, and Volatile Organic Compounds from Shallow-Pit Pig Nursery Rooms

Emissions of Odor, Ammonia, Hydrogen Sulfide, and Volatile Organic Compounds from Shallow-Pit Pig Nursery Rooms

Combined Biogas and Bioethanol Production: Opportunities and Challenges for Industrial Application

Characterization of food waste-recycling wastewater as biogas feedstock

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