Performances of anaerobic co-digestion of fruit &amp; vegetable waste (FVW) and food waste (FW): Single-phase vs. two-phase

Shen, Fei; Yuan, Hairong; Pang, Yunzhi; Chen, Shulin; Zhu, Baoning; Zou, Dexun; Liu, Yan-Ping; Ma, Jingwei; Yu, Liang; Li, Xiujin

doi:10.1016/j.biortech.2013.06.099

Cited by 303 publications

(119 citation statements)

References 26 publications

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“…According to Shen et al (2013), the statistical coefficients of variation (SD) for biogas production can directly reflect the buffering capability of digestion system to newfed substrates and the stability of digestion performance. The statistical calculation results indicated that the SD for methane production in the stable periods of the two-phase system was always lower than 15 %.…”

Section: Biogasmentioning

confidence: 99%

Two-phase anaerobic co-digestion of used vegetable oils’ wastes and pig manure

Hidalgo

Gómez

Martín-Marroquín

et al. 2014

Int. J. Environ. Sci. Technol.

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The purpose of this work was to study the anaerobic co-digestion of all the by-products generated during the processing of used vegetable oils (UVO) with the objective of proposing a solution for the treatment of these wastes. More specifically, this study investigates the advantages of two-phase anaerobic digestion for treating a mixture (1/5 v/v) of UVO processing wastes (OW) and pig manure (PM) using two semi-continuous digesters operated at mesophilic temperature (37 ± 1°C). The experiments were conducted at hydraulic retention time (HRT) of 0.5, 1, 2 and 4 days in the first stage (acidifier) and at HRT of 11.5, 15, 18 and 20 days in the second stage (methaniser). The results revealed that the HRT had a high influence on the soluble chemical oxygen demand (sCOD) and total dissolved solids (TDS) removal. The maximum total sCOD removal efficiency of 86.4 % and TDS removal efficiency of 81.9 % was achieved at 20 days of global HRT. The maximum biogas production of 0.65 m 3 per kilogramme of volatile dissolved solids (VDS) was removed, corresponding to a methane production of 0.42 m 3 CH 4 kg -1 . VDS removed (65 % CH 4 ) was also achieved at 20 days of HRT. The two-phase digestion system showed good stability, which was mainly attributed to the strong buffering capacity with the two-phase system and the high alkalinity from PM when co-digested with OW. The results obtained from this study provide fundamental information for scaling up a high-performance two-phase anaerobic system in the future.

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Section: Biogasmentioning

confidence: 99%

Two-phase anaerobic co-digestion of used vegetable oils’ wastes and pig manure

Hidalgo

Gómez

Martín-Marroquín

et al. 2014

Int. J. Environ. Sci. Technol.

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“…OFMSW, farm and livestock wastes); comparative performances of different digester configurations are available in the literature [23,[42][43][44]. Successful OFMSW digesters use extensive pre-and post-digestion processing units in a variety of configurations for handling high-solid and heterogeneous nature of feedstocks [45].…”

Section: Taxonomy Of Ad Technologies For Urban Applicationsmentioning

confidence: 99%

“…A matrix of current AD technologies (of global relevance) is developed, taking stock of the merits and the limitations of each in terms of their decentralisation potentials, especially on the grounds of their digestion stability, emissions from pre-and post-digestion stages and environmental consequences ( Table 1). Relevant to urban application, staging of the AD process (typically two-stage) has been found effective for food-based digestion, owing to their positive impact on waste stabilisation and methane yield, compared to single stage reactors [23,42,44].…”

Section: 4)mentioning

confidence: 99%

“…The majority of AD literature to-date reports innovations in the following two areas from the view point of technology fool proofing -biogas production, primarily enhancing the energy conversion efficiency [13][14][15][16]; and, attaining process stability, either through process intensification [17][18][19] or through co-digestion using a combination of feedstock [20][21][22][23][24]. Evaluation of the environmental performance of these systems with due consideration to the lateral emissions (mainly discharge to air and water) is not extensively covered in the literature.…”

Section: Lateral Issues Of Environmental Concern For Ofmsw Digestionmentioning

confidence: 99%

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Emerging perspectives on environmental burden minimisation initiatives from anaerobic digestion technologies for community scale biomass valorisation

Tiwary

Williams

Pant

et al. 2015

Renewable and Sustainable Energy Reviews

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This paper provides an extensive review of anaerobic digestion (AD) systems, with a specific focus on community scale digesters for urban applications, processing either municipal organic waste exclusively or as mix feed. Emphasis is placed on reducing the systems scale environmental impact of AD technologies, including pre-and post-treatment stages, alongside biogas production. Developments to-date in AD system research in Europe and in the Asia region have been compared, providing a comprehensive evaluation of current practice, elucidating the areas of further potentials.The scope of this review is two-fold -one, covering AD technologies including a cohort of simple and integrated wet and dry systems, which can be operated as continuous flow designs in single-or multi-stages. Two, focusing more on practices in digestate handling that minimise environmental impacts arising from their storage and land application. From an environmental perspective, we note the following trends emerging in the literature for processing urban waste that need further exploitation: dry AD (60-85% moisture) is suitable for low organic loads, mainly owing to resource savings in terms of water usage; co-digestion has shown better buffering capability, especially for two-stage digestion of food-based feed stocks; separating the digestate into liquid/solid fractions is effective for handling postdigestion emissions, mainly for mitigating ammonia volatilisation to air and phosphate leaching to soil.We report responses to a survey, conducted for this review, highlighting the contemporary issues and challenges -with particular focus on the operational, social and management issues from an Indian perspective. There is need for follow-up of running plants to ensure their environmental performance. Such initiatives will have to consider managing of pollution footprints from AD, alongside the current drive for its widespread implementation for two incentives: greenhouse gas mitigation and fossil-fuel independence.

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“…Wu [10] stated that the physical characteristics of bio-slurry is similar to that of the fluid whose flow field during mixing is a two phase process of feedstock and water, and simulation calculation was done on the two phase flow of the non-Newton fluid in the digester with CFD software. Shen, et al [11] made comparative analysis on the single phase flow and two phase flow in D DAVID PUBLISHING the fermentation slurry; but dispute remains in the circle on which of the three mixing methods is superior. For instance, as found by Wu [12], flow field of mechanical stirring is the best, followed by pneumatic stirring, next to hydraulic stirring by CFD simulation.…”

mentioning

confidence: 99%

The Research on Optimization of the Multiphase Flow Field of Biogas Plant by Using CFD Software

Huang¹,

Liu²,

Luo³

et al. 2014

JEPE

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Abstract:The inner flow field of a biogas plant can be optimized by agitating the feedstock to be evenly distributed for a rising biogas production rate. A hydraulic agitator can be installed in the digester with outlets far above the bottom. Hydraulic mixing is essential in a solid-liquid two-phase flow process, in which large solid particles can be found at the initial stage and turn to being high-concentration viscous liquid (non-Newtonian fluid). A 0.75 m³ digester was taken as a case study with CFD (computational fluid dynamics) software. The basic pattern was simulated by using water as the medium and the pattern of pseudo plastic fluid state was simulated by the Euler-Euler Model, then the effect of optimized design with bottom inflow and high dispersed outlets could be verified. Viewed from the mixing effects, the velocity of 0.6 m/s is better than 1 m/s for water medium, while 1 m/s better than 0.6 m/s for pseudo plastic fluid medium.

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Performances of anaerobic co-digestion of fruit & vegetable waste (FVW) and food waste (FW): Single-phase vs. two-phase

Cited by 303 publications

References 26 publications

Two-phase anaerobic co-digestion of used vegetable oils’ wastes and pig manure

Two-phase anaerobic co-digestion of used vegetable oils’ wastes and pig manure

Emerging perspectives on environmental burden minimisation initiatives from anaerobic digestion technologies for community scale biomass valorisation

The Research on Optimization of the Multiphase Flow Field of Biogas Plant by Using CFD Software

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