Scale-up evaluation of the anaerobic digestion of food-processing industrial wastes

Fiore, Silvia; Ruffino, Barbara; Campo, Giuseppe M.; Roati, Chiara; Zanetti, Mariachiara

doi:10.1016/j.renene.2016.05.049

Cited by 48 publications

(11 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This generated an acid environment that inhibited the formation and growth of methanogenic bacteria. This fact has also been noticed in other scientific research [17,36,38,39,[41][42][43][44]54]. Under these conditions, on day 21 we decided to stop the experiment.…”

Section: Biogas Productionsupporting

confidence: 57%

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

et al. 2018

View full text Add to dashboard Cite

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%.

show abstract

Section: Biogas Productionsupporting

confidence: 57%

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

et al. 2018

View full text Add to dashboard Cite

show abstract

“…At the beginning of the experiment the pH of the mixture in the reactor was set to 7, by adding sodium bicarbonate, 150 mg.L -1 , which also provided the alkalinity adequate to the anaerobic digestion process as described in the literature [14]. When the process was interrupted, approximately after 360 hours, the pH was between 7 and 7.6 for all the tests, being in accordance with the values considered satisfactory for the AD process, evidencing that the added alkalinity was enough to maintain the pH within the reactor in a suitable range.…”

Section: Resultssupporting

confidence: 74%

Anaerobic Digestion Performance in the Energy Recovery of Kiwi Residues

Martins

Boaventura

Paulista

2017

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Abstract. World production and trade of fruits generate losses in the harvest, post-harvest, handling, distribution and consumption phases, corresponding to 6.8% of total production. These residues present high potential as a substrate for the anaerobic digestion process and biogas generation. Thus, the energy valuation of the agro-industrial residues of kiwi production was evaluated by anaerobic digestion, aiming at optimizing the biogas production and its quality. Ten assays were carried out in a batch reactor (500 mL) under mesophilic conditions and varying a number of operational factors: different substrate/inoculum ratios; four distinct values for C: N ratio; inoculum from different digesters; and inoculum collected at different times of the year. The following parameters were used to control and monitor the process: pH, alkalinity, volatile fatty acids (VFA), volatile solids (VS) and chemical oxygen demand (COD). Among the tests performed, the best result obtained for the biogas production corresponded to the use of 2 g of substrate and 98 mL of inoculum of the anaerobic digester of the Wastewater Treatment Plant (WWTP) of Bragança, with addition of 150 mg of bicarbonate leading to a production of 1628 L biogas.kg -1 VS (57% methane). In relation to the biogas quality, the best result was obtained with 20 g of substrate and 380 mL of inoculum from the anaerobic digester sludge of WWTP of Ave (with addition 600 mg of sodium bicarbonate), presenting a value of 85% of CH 4 , with a production of 464 L biogas.kg -1 VS.

show abstract

“…In order to perform a more adequate comparison with the above-presented technologies, the obtained yields in laboratory scale (see Table 6) were used for the scale-up procedure [52,65,66] as design specifications for a system to have a production comparable to the other technologies of this case study, in the range 10-15 kW H2 (Table 7). Moreover, Table 8 shows the sizing parameters used to perform the ESA.…”

Section: Two-stage Anaerobic Digestion (Tsad)mentioning

confidence: 99%

Energy Sustainability Analysis (ESA) of Energy-Producing Processes: A Case Study on Distributed H2 Production

Gómez-Camacho

Ruggeri

2019

Sustainability

View full text Add to dashboard Cite

In the sustainability context, the performance of energy-producing technologies, using different energy sources, needs to be scored and compared. The selective criterion of a higher level of useful energy to feed an ever-increasing demand of energy to satisfy a wide range of endo- and exosomatic human needs seems adequate. In fact, surplus energy is able to cover energy services only after compensating for the energy expenses incurred to build and to run the technology itself. This paper proposes an energy sustainability analysis (ESA) methodology based on the internal and external energy use of a given technology, considering the entire energy trajectory from energy sources to useful energy. ESA analysis is conducted at two levels: (i) short-term, by the use of the energy sustainability index (ESI), which is the first step to establish whether the energy produced is able to cover the direct energy expenses needed to run the technology and (ii) long-term, by which all the indirect energy-quotas are considered, i.e., all the additional energy requirements of the technology, including the energy amortization quota necessary for the replacement of the technology at the end of its operative life. The long-term level of analysis is conducted by the evaluation of two indicators: the energy return per unit of energy invested (EROI) over the operative life and the energy payback-time (EPT), as the minimum lapse at which all energy expenditures for the production of materials and their construction can be repaid to society. The ESA methodology has been applied to the case study of H2 production at small-scale (10–15 kWH2) comparing three different technologies: (i) steam-methane reforming (SMR), (ii) solar-powered water electrolysis (SPWE), and (iii) two-stage anaerobic digestion (TSAD) in order to score the technologies from an energy sustainability perspective.

show abstract

Scale-up evaluation of the anaerobic digestion of food-processing industrial wastes

Cited by 48 publications

References 32 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

Anaerobic Digestion Performance in the Energy Recovery of Kiwi Residues

Energy Sustainability Analysis (ESA) of Energy-Producing Processes: A Case Study on Distributed H2 Production

Contact Info

Product

Resources

About