Recent Progress on Dry Anaerobic Digestion of Organic Solid Wastes: Achievements and Challenges

Lei, Zhongfang; Zhang, Zhenya; Huang, Weiwei; Cai, Wei

doi:10.2174/1385272819666150119222633

Cited by 13 publications

(8 citation statements)

References 2 publications

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“…For the experimental study, a quantity of 80 kg of inoculum (i.e., animal livestock manure from pigs and cows) was used. The ratio of inoculum TS/substrate was 36.1%, which is in accordance with data from the literature specifying 30-50% [14,39]. The OFMSW/other organic wastes ratio is 1:1.…”

Section: Methodssupporting

confidence: 89%

Pilot-Scale Anaerobic Co-Digestion of the OFMSW: Improving Biogas Production and Startup

et al. 2018

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This paper presents experimental results regarding anaerobic co-digestion of the organic fraction of municipal solid waste and fruit and vegetable waste in order to establish the efficiency of a 2 m3 volume pilot plant in terms of biogas and methane yield and stability of the process. The research study presents the feasibility of developing anaerobic digestion as an effective method for municipal solid waste management. The experiments were conducted in mesophilic conditions (35 °C). Domestic waste water was used as inoculum. The results showed that the inoculum presence, temperature, and pH control, were essential in order to improve biogas production and its composition. Using liquid inoculum, the CH4 percentage in the biogas oscillated between 44% and 51%, and the biogas production from 0.504 and 0.6 m3/day. Compared to domestic waste water, animal manure increased the CH4 concentration in biogas (up to 63%), while the daily biogas production increased by 26% and varied from 0.693 to 0.786 m3. The cumulative biogas production at the end of the experiments were 11.7 m3 and 15.89 m3, respectively. Using inoculum and co-digestion, the plant startup time was significantly reduced, the total solids content decreased from 22.7% to 19.8%, while the volatile solids decreased from 37.6% to 31.2%.

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Section: Methodssupporting

confidence: 89%

Pilot-Scale Anaerobic Co-Digestion of the OFMSW: Improving Biogas Production and Startup

et al. 2018

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“…Commercial dry anaerobic digestion processes such as Valorga, Dranco, Kompogas, Bekon, and Bioferm are the most prevalent processes for treating municipal solid waste (MSW), biowaste, livestock waste, as well as green waste (Table 1) [10,39]. According to several reviews [39][40][41] [45], Lei et al [40] and Andre et al [39].…”

Section: Operating Strategies Of Dry Anaerobic Digestion Processmentioning

confidence: 99%

“…Approximately 80-160 m 3 t −1 of biogas can be recovered [42,43]. Solid digestate generated from the process can be used as soil amendment after being dewatered and stored under aerobic conditions [40].…”

Section: Homogenizationmentioning

confidence: 99%

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Dry Anaerobic Digestion for Agricultural Waste Recycling

Riya¹,

Meng²,

Wang³

et al. 2021

Biogas - Recent Advances and Integrated Approaches

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For sustainable agriculture, it is important to manage agricultural wastes, such as crop residues and livestock wastes. Anaerobic digestion has been gathering the attention to recycle these wastes into renewable energy (biogas) and fertilizer (soil amendment) (digestate). Dry anaerobic digestion is defined as digestion at higher than 20% of total solid (TS) content in the reactor, which is suitable for wastes with high TS content, such as agricultural wastes. In this chapter, we reviewed recent advances in biogas production and use of digestate as soil amendment from dry anaerobic digestion of agricultural wastes. It has been found that ammonia concentration, feed/inoculum (F/I) ratio, and TS content are important parameters for operation of dry anaerobic digestion. Several operation technologies have been in operation, while new operation strategies have been developed. Application of solid digestate into the soil is beneficial to increase soil properties; however it should be carefully operated because it has risks of nitrate leaching and soil pathogens.

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“…Dry Anaerobic Digestion (AD) has attracted increasingly extensive attentions in the studies of biogas fermentation with advantages of water-saving, higher volumetric organic loading rate, higher biogasification performance, smaller reactor capacity requirement, less energy used for heating, easier handle ability of digestate, and higher energy recovery as compared to wet AD [2,3]. This process is more feasible to a wide range of organic wastes including waste water sludge from industries with the recovery of renewable energy and reduction in pollution load [4].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Biogas Production in Dry Anaerobic Digestion of Swine Manure by the Use of Alkalinity Index to Monitor a Prototype Cylindrical Digester

Andole¹,

Lei²,

Zhang³

et al. 2017

RSE

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Anaerobic digestion (AD) is one of the best alternative sustainable technologies for energy production and recovery from organic solid wastes. Up to now dry AD has been commercialized in the treatment of municipal solid wastes. Little information could be found on the practical application of dry AD to manure wastes or waste activated sludge. This study aimed at testing the feasibility of using alkalinity to manage dry AD system for swine manure treatment and clarify its effect on the stability and efficiency of the newly-developed prototype cylindrical digester system. A prototype cylindrical digester with a diameter of 40 mm and a volume of 1.3 liters was designed and fabricated. It was operated under mesophilic conditions (38°C). The alkalinity of manure was increased by 3000 g/L (R 1 ) and 6000 g/L (R 2 ) by adding sodium bicarbonate with the raw swine manure as the control (R 0 ). Results showed that R 1 and R 2 maintained a relatively higher level of alkalinity during the whole operation compared to the control (R 0 ). Only one peak appeared in biogas production for the control reactor (R 0 ) which almost ceased on day 12, whereas R 1 and R 2 exhibited two biogas peaks. The 30 days' biogas yield for R 2 was 276.6 ml/g-VS added while R 1 was 204.8 ml/g-VS added which corresponds to an increase by 2.7-and 1.7-fold respectively as compared to the control (R 0 ). 2.2-and 4.1-fold increase in methane production was achieved in R 1 and R 2 respectively as compared to R 0 . This difference is most probably attributable to the high alkalinity in R 1 and R 2 that stabilized the digestion process and minimized the influence of pH variations on methanogenesis.

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Recent Progress on Dry Anaerobic Digestion of Organic Solid Wastes: Achievements and Challenges

Cited by 13 publications

References 2 publications

Pilot-Scale Anaerobic Co-Digestion of the OFMSW: Improving Biogas Production and Startup

Pilot-Scale Anaerobic Co-Digestion of the OFMSW: Improving Biogas Production and Startup

Dry Anaerobic Digestion for Agricultural Waste Recycling

Optimization of Biogas Production in Dry Anaerobic Digestion of Swine Manure by the Use of Alkalinity Index to Monitor a Prototype Cylindrical Digester

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