Methane Production from Confectionery Wastewater Treated in the Anaerobic Labyrinth-Flow Bioreactor

Dębowski, Marcin; Kisielewska, Marta; Kazimierowicz, Joanna; Zieliński, Marcin

doi:10.3390/en16010571

Cited by 3 publications

(10 citation statements)

References 55 publications

(79 reference statements)

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“…It was found that an increase in OLR to 7.0 g COD/L•d resulted in a decrease in COD removal efficiency to 61.6 ± 4.4% and yielded 4.30 ± 0.48 gO2/L in the effluent. Similar observations were made for the BOD5 and TOC indices [45]. At OLRs of 5.0 g COD/L•d and 6.0 g COD/L•d, BOD5 removal efficiencies of 83.9 ± 2.7% and 82.2 ± 3.6% were achieved, respectively.…”

Section: Organic Compounds Removalsupporting

confidence: 84%

“…At an OLR of 7.0 g COD/L•d, a decrease in TOC consumption of 64.9 ± 8.7% was observed. The TOC concentration of the wastewater was 1.32 ± 0.12 gO2/L [45]. The LCRF used in this study provided a higher removal efficiency of all analysed indicators.…”

Section: Organic Compounds Removalmentioning

confidence: 72%

“…It should be emphasised that in the research presented here, real wastewater with high variability was used, and it was treated in a reactor operated on a fractionated technical scale under conditions similar to those of an industrial plant. In previous studies by the authors [45] in which VAL-FB was used without LCRF for the treatment of confectionery wastewater, it was found that the highest removal rate of organic compounds of about 75%, expressed in COD, was achieved at an OLR of 5.0 g COD/L•d and 6.0 g COD/L•d. In the effluent, 2.76 ± 0.17 gO2/L and 2.80 ± 0.06 gO2/L were measured.…”

Section: Organic Compounds Removalmentioning

confidence: 97%

“…The initial parameters of the experiments were developed based on the results of previous studies by the authors regarding the treatment of confectionery wastewater (CW) in a vertical anaerobic labyrinth flow bioreactor (VAL-FB) [45]. Optimisation work was carried out to determine the most effective technological parameters for the fermentation process.…”

Section: Organisational and Technological Research Designmentioning

confidence: 99%

“…(Table 4). The use of LCRF led to an increase in biogas and CH4 production compared to methane fermentation in VAL-FB without filling [45], with the highest biogas production being achieved at an OLR of 5.0 g COD/L•d and 6.0 g COD/L •d. The biogas production was 135.0 ± 12.0 g COD/L•d, respectively.…”

Section: Biogas and Ch4 Productionmentioning

confidence: 99%

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Application of Recycled Filling to Improve the Purification Performance of Confectionery Wastewater in a Vertical Anaerobic Labyrinth Flow Bioreactor

Dębowski,

Kazimierowicz,

Ignaciuk

et al. 2024

Energies

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Anaerobic wastewater treatment is, in many cases, a justified alternative to typical activated sludge processes, from a technological, economic, and ecological point of view. The optimisation of fermentation reactors is primarily concerned with increasing the biodegradation of organic compounds and biogas production, as well as improving efficiency in the removal of nitrogen and phosphorus compounds. The aim of the research was to determine the impact of using low-cost recycled filling on the efficiency of treating real confectionery wastewater in a vertical anaerobic labyrinth flow bioreactor. The experiments focused on selecting the organic loading rate that would allow for the effective biodegradation and removal of pollutants, as well as the efficient production of biomethane. It was found that the tested reactor can operate efficiently at a maximum organic loading rate (OLR) of 7.0–8.0 g of chemical oxygen demand (COD)/L·d. In this OLR range, high efficiency was guaranteed for both wastewater treatment and biogas production. However, increasing the OLR value to 8.0 g COD/L·d had a significant negative effect on the methane (CH4) content in the biogas. The most efficient variants achieved a biodegradation efficiency of around 90% of the organic compounds, a CH4 content of over 70% in the biogas, and a biogas yield of over 400 L/kg of COD removed. A significant influence of the applied OLR on the ratio of free organic acids (FOS) to total alkaline capacity (TAC) and pH was observed, as well as a strong correlation of these indicators with the specific biogas yield and CH4 content. The application of a solution based on the use of a hybrid system of anaerobic granulated sludge and an anaerobic filter resulted in an efficient treatment process and an almost complete elimination of suspensions from the wastewater.

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Section: Organic Compounds Removalsupporting

confidence: 84%

Section: Organic Compounds Removalmentioning

confidence: 72%

Section: Organic Compounds Removalmentioning

confidence: 97%

Section: Organisational and Technological Research Designmentioning

confidence: 99%

Section: Biogas and Ch4 Productionmentioning

confidence: 99%

See 3 more Smart Citations

Application of Recycled Filling to Improve the Purification Performance of Confectionery Wastewater in a Vertical Anaerobic Labyrinth Flow Bioreactor

Dębowski,

Kazimierowicz,

Ignaciuk

et al. 2024

Energies

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Hybrid treatment of confectionery wastewater using a biofilter and a cyanobacteria-based system with simultaneous valuable metabolic compounds production

Patsialou,

Politou,

Nousis

et al. 2024

Algal Research

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Biogas Production and Metagenomic Analysis in a New Hybrid Anaerobic Labyrinth-Flow Bioreactor Treating Dairy Wastewater

et al. 2023

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Increasing worldwide milk manufacturing and dairy processing resulted in producing more effluents, and thus effective management of wastewater is now the most important issue. This study used a new design of a pilot plant-scale hybrid anaerobic labyrinth-flow bioreactor (AL-FB) to increase the efficiency of anaerobic biodegradation and biogas productivity and improve anaerobic microflora performance. In addition, effluent recirculation was used to boost the treatment of dairy wastewater. Metagenomic analyses of the anaerobic microbial community were performed. It was found that an organic loading rate (OLR) of 4.0–8.0 g COD/L·d contributed to the highest CH4 yield of 0.18 ± 0.01–0.23 ± 0.02 L CH4/g COD removed, which corresponded to a high COD removal of 87.5 ± 2.8–94.1 ± 1.3%. The evenest distribution of the microorganisms’ phyla determined the highest biogas production. In all tested samples, Bacteroidetes and Firmicutes abundance was the highest, and Archaea accounted for about 4%. Metagenomic studies showed that methane was mainly produced in acetoclastic methanogenesis; however, higher OLRs were more favorable for enhanced hydrogenotrophic methanogenesis. Effluent recirculation enhanced the overall treatment. Thus, at OLR of 10.0 g COD/L·d, the highest COD removal was 89.2 ± 0.4%, and methane production yield achieved 0.20 ± 0.01 L CH4/g COD removed, which was higher by 25% compared to the achievements without recirculation.

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Methane Production from Confectionery Wastewater Treated in the Anaerobic Labyrinth-Flow Bioreactor

Cited by 3 publications

References 55 publications

Application of Recycled Filling to Improve the Purification Performance of Confectionery Wastewater in a Vertical Anaerobic Labyrinth Flow Bioreactor

Application of Recycled Filling to Improve the Purification Performance of Confectionery Wastewater in a Vertical Anaerobic Labyrinth Flow Bioreactor

Hybrid treatment of confectionery wastewater using a biofilter and a cyanobacteria-based system with simultaneous valuable metabolic compounds production

Biogas Production and Metagenomic Analysis in a New Hybrid Anaerobic Labyrinth-Flow Bioreactor Treating Dairy Wastewater

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