Cheese whey co-digestion treatment in a tubular system: microbiological behaviour along the axial axis

Jaimes-Estévez, Jaime; Castro, Liliana; Escalante, Humberto; Carrillo, Daniel Felipe Giraldo; Portillo, S.; Sotres, Ana; Morán, Antonio

doi:10.1007/s13399-020-00988-4

Cited by 10 publications

(9 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This behavior was because the tubular digester design highlighted the separation phases in the axial direction: acid phase (at the beginning of the digester) and methane phase (in the final digester). Therefore, the highest number of archaea was at the end of the digester, and consequently, the SMA increased [40]. Moreover, substrate type and temperature were the primary factors influencing microbial activity.…”

Section: Microbiological Analysismentioning

confidence: 98%

“…[39]. Although the VFA content varies along the digester [40], the outlet Pr/Ac ratio was 0.11 (acetic acid concentration of 244 mg/L). Up to now, there are no reports of individual volatile fatty acid values for low cost tubular digesters.…”

Section: Chemical Oxygen Demand Concentration For Influent (Blue Rhombuses) and Effluent (Orange Cruxes) During Olr Changesmentioning

confidence: 99%

See 1 more Smart Citation

Psychrophilic Full Scale Tubular Digester Operating over Eight Years: Complete Performance Evaluation and Microbiological Population

Jaimes-Estévez¹,

Zafra²,

Martí-Herrero³

et al. 2020

Energies

Self Cite

View full text Add to dashboard Cite

Most biogas plants in the world run under psychrophilic conditions and are operated by small and medium farmers. There is a gap of knowledge on the performance of these systems after several years of operation. The aim of this research is to provide a complete evaluation of a psychrophilic, low-cost, tubular digester operated for eight years. The thermal performance was monitored for 50 days, and parameters such as pH, total volatile fatty acid (tVFA), chemical oxygen demand (COD) and volatile solids (VS) were measured every week for the influent and effluent. The digester operated at a stabilized slurry temperature of around 17.7 °C, with a mean organic load rate (OLR) equal to 0.52 kg VS/m3digester *d and an estimated hydraulic retention time (HRT) of 25 days. The VS reduction in the digester was around 77.58% and the COD reduction was 67 ± 3%, with a mean value for the effluent of 3.31 ± 1.20 g COD/Lt, while the tVFA decreased by 83.6 ± 15.5% and the presence of coliforms decreased 10.5%. A BioMethane potential test (BMP) for the influent and effluent showed that the digester reached a specific methane production of 0.40 Nm3CH4/kg VS and a 0.21 Nm3CH4/m3digester d with 63.1% CH4 in the biogas. These results, together with a microbiological analysis, show stabilized anaerobic digestion and a biogas production that was higher than expected for the psychrophilic range and the short HRT; this may have been due to the presence of an anaerobic digestion microorganism consortium which was extremely well-adapted to psychrophilic conditions over the eight-year study period.

show abstract

Section: Microbiological Analysismentioning

confidence: 98%

Section: Chemical Oxygen Demand Concentration For Influent (Blue Rhombuses) and Effluent (Orange Cruxes) During Olr Changesmentioning

confidence: 99%

Psychrophilic Full Scale Tubular Digester Operating over Eight Years: Complete Performance Evaluation and Microbiological Population

Jaimes-Estévez¹,

Zafra²,

Martí-Herrero³

et al. 2020

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

“…Jaimes-Estévez et al [28] found that in tubular reactors, where they treated CW and CM in A-COD at different organic loading rates of OLR (0.5, 1.0, and 1.5 kg CDO /m 3 d −1 ), there was a balance between the hydrogenotrophic methanogens and acetoclastics for the OLR of 0.5 kg CDO /m 3 d −1 ; in the intermediate OLR (1.0 kg CDO /m 3 d −1 ), acetoclastic bacteria predominated, but there were pH problems as the TRH progressed. For this reason, they added an alkalinizer.…”

Section: Trends Associated With Reactor Configurationmentioning

confidence: 99%

“…Indeed, CW and cow manure (CM) can be used as raw materials to obtain energy for the production processes in this sector. In Latin America, particularly in Colombia, some studies [14,28] have analyzed the biogas production potential at a laboratory scale and the production of struvite from CW. Nevertheless, it is still a subject of recent research.…”

Section: Introductionmentioning

confidence: 99%

Opportunities for Waste to Energy in the Milk Production Industry: Perspectives for the Circular Economy

et al. 2021

View full text Add to dashboard Cite

Cheese whey is a waste produced in the dairy industry which generates problems if it is dumped directly into the sewer due to its high organic load. An alternative for cheese whey management is anaerobic digestion, a biological process that transforms organic matter into biogas and digestate, two products with significant energy and agricultural potential. This work was aimed at contributing to the building of knowledge about the anaerobic degradation of cheese whey, developing a bibliometric analysis, and tracing trends in related research from 2010 up to the present, using PRISMA® to develop a systematic review based on Scopus® and using Excel® and bibliometric software (VosViewer® and RefViz®) for the identification of information. Our results show that the research around cheese whey is relatively recent and that the highest percentage of publications is from 2018 onwards. Twelve variables of the anaerobic cheese whey degradation process were identified and grouped into five factors: substrate, reactor configuration, digestate analysis, microbiological analysis, and inoculum. Likewise, it was identified that most of the anaerobic processes allow the implementation of the circular economy into the dairy sector. In conclusion, the application of anaerobic digestion in the dairy sector can help to close the productive cycles, produce biofuels, and reduce pollution.

show abstract

“…Anaerobic digestion (AD) is a process in which microorganisms degrade high contents of organic matter from different types of waste (e.g., sewage sludge, food waste, animal manure, industrial and agricultural residues) by producing biogas via anaerobic metabolism [1][2][3][4]. The complexity of some raw materials requiring pre-treatment, and the microbial processes involved, limits the metabolic development between species, leading to long hydraulic retention times (HRT), low efficiency in the bioconversion of organic waste to methane, and constant monitoring of parameters such as pH, temperature, feed flow rate, and inhibitors [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Bioelectrochemical enhancement of methane production from exhausted vine shoot fermentation broth by integration of MEC with anaerobic digestion

Carrillo-Peña

Escapa

Hijosa‐Valsero

et al. 2022

Biomass Conv. Bioref.

View full text Add to dashboard Cite

A microbial electrolysis cell integrated in an anaerobic digestion system (MEC-AD) is an efficient configuration to produce methane from an exhausted vine shoot fermentation broth (EVS). The cell worked in a single-chamber two-electrode configuration at an applied potential of 1 V with a feeding ratio of 30/70 (30% EVS to 70% synthetic medium). In addition, an identical cell operated in an open circuit was used as a control reactor. Experimental results showed similar behavior in terms of carbon removal (70–76%), while the specific averaged methane production from cycle 7 was more stable and higher in the connected cell (MECAD) compared with the unpolarized one (OCAD) accounting for 403.7 ± 33.6 L CH4·kg VS−1 and 121.3 ± 49.7 L CH4·kg VS−1, respectively. In addition, electrochemical impedance spectroscopy revealed that the electrical capacitance of the bioanode in MECAD was twice the capacitance shown by OCAD. The bacterial community in both cells was similar but a clear adaptation of Methanosarcina Archaea was exhibited in MECAD, which could explain the increased yields in CH4 production. In summary, the results reported here confirm the advantages of integrating MEC-AD for the treatment of real organic liquid waste instead of traditional AD treatment.

show abstract

Cheese whey co-digestion treatment in a tubular system: microbiological behaviour along the axial axis

Cited by 10 publications

References 45 publications

Psychrophilic Full Scale Tubular Digester Operating over Eight Years: Complete Performance Evaluation and Microbiological Population

Psychrophilic Full Scale Tubular Digester Operating over Eight Years: Complete Performance Evaluation and Microbiological Population

Opportunities for Waste to Energy in the Milk Production Industry: Perspectives for the Circular Economy

Bioelectrochemical enhancement of methane production from exhausted vine shoot fermentation broth by integration of MEC with anaerobic digestion

Contact Info

Product

Resources

About