Evaluation of dairy processing wastewater biotreatment in an IASBR system: Aeration rate impacts on performance and microbial ecology

Gil-Pulido, Beatriz; Tarpey, Emma; Almeida, Eduardo L.; Finnegan, William; Zhan, Xinmin; Dobson, Alan D. W.; O’Leary, Niall

doi:10.1016/j.btre.2018.e00263

Cited by 31 publications

(20 citation statements)

References 54 publications

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“…The high demand milk and milk products has led to an increase in dairy production globally. In the EU, since the removal of milk production quotas in 2015, the dairy industry has undergone rapid growth (Gil-Pulido et al, 2018). Dairy plants produce large volumes of wastewater; it is estimated that 1-2 m 3 of wastewater is produced per m 3 of manufactured milk (Quaiser and Bitter, 2016;Slavov, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Dairy plants produce large volumes of wastewater; it is estimated that 1-2 m 3 of wastewater is produced per m 3 of manufactured milk (Quaiser and Bitter, 2016;Slavov, 2017). These wastewaters are characterized by high organic load and nutrient composition (Demirel et al, 2005;Lateef et al, 2013;Gil-Pulido et al, 2018). Several approaches, including physical-chemical and biological processes, are applied to treat dairy wastewaters.…”

Section: Introductionmentioning

confidence: 99%

“…Several approaches, including physical-chemical and biological processes, are applied to treat dairy wastewaters. However, physico-chemical processes present high reagent costs and low chemical oxygen demand (COD) removals, leading to the favoring of biological processes (Demirel et al, 2005;Gil-Pulido et al, 2018). High-rate anaerobic digestion (AD) is an efficient and well-established biological process to treat wastes and wastewaters.…”

Section: Introductionmentioning

confidence: 99%

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Microbial Community Redundancy and Resilience Underpins High-Rate Anaerobic Treatment of Dairy-Processing Wastewater at Ambient Temperatures

Paulo

Castilla-Archilla

Ramiro-García

et al. 2020

Front. Bioeng. Biotechnol.

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High-rate anaerobic digestion (AD) is a reliable, efficient process to treat wastewaters and is often operated at temperatures exceeding 30 • C, involving energy consumption of biogas in temperate regions, where wastewaters are often discharged at variable temperatures generally below 20 • C. High-rate ambient temperature AD, without temperature control, is an economically attractive alternative that has been proven to be feasible at laboratory-scale. In this study, an ambient temperature pilot scale anaerobic reactor (2 m 3 ) was employed to treat real dairy wastewater in situ at a milk processing plant, at organic loading rates of 1.3 ± 0.6 to 10.6 ± 3.7 kg COD/m 3 /day and hydraulic retention times (HRT) ranging from 36 to 6 h. Consistent high levels of COD removal efficiencies, ranging from 50 to 70% for total COD removal and 70 to 84% for soluble COD removal, were achieved during the trial. Within the reactor biomass, stable active archaeal populations were observed, consisting mainly of Methanothrix (previously Methanosaeta) species, which represented up to 47% of the relative abundant active species in the reactor. The decrease in HRT, combined with increases in the loading rate had a clear effect on shaping the structure and composition of the bacterial fraction of the microbial community, however, without affecting reactor performance. On the other hand, perturbances in influent pH had a strong impact, especially when pH went higher than 8.5, inducing shifts in the microbial community composition and, in some cases, affecting negatively the performance of the reactor in terms of COD removal and biogas methane content. For example, the main pH shock led to a drop in the methane content to 15%, COD removals decreased to 0%, while the archaeal population decreased to ∼11% both at DNA and cDNA levels. Functional redundancy in the microbial community underpinned stable reactor performance and rapid reactor recovery after perturbations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microbial Community Redundancy and Resilience Underpins High-Rate Anaerobic Treatment of Dairy-Processing Wastewater at Ambient Temperatures

Paulo

Castilla-Archilla

Ramiro-García

et al. 2020

Front. Bioeng. Biotechnol.

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“…The contributions of the dominant OTUs to the activity involved in the nitrogen and phosphate cycles in wastewater treatment systems, as defined by Gonzalez‐Martinez et al and Gil‐Pulido et al, are shown in Supporting Information Figure S2. With respect to nitrification genes, the autotrophic ammonia oxidation genes amo and hao were not found in any of the samples.…”

Section: Resultsmentioning

confidence: 99%

“…Many dominant OTUs appear to have the potential to contribute polyphosphate kinase capacities, which has been closely related to the phosphate biological removal . These were Otu0002, Otu0003, Otu0004, Otu0005, Otu0006, Otu0007, Otu0008, Otu0009, Otu0013, Otu0014, Otu0016, and Otu0022.…”

Section: Resultsmentioning

confidence: 99%

Insight on the bacterial ecology in membrane bioreactor: Operational conditions effect over dominant ecological players

et al. 2018

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A bench‐scale bioreactor was operated under two different technologies of membrane bioreactor and hybrid moving bed bioreactor‐membrane bioreactor at hydraulic retention time 6–16 h, sludge retention time 6–24 days, and mixed liquor suspended solids 3400–7800 mg L−1. Analyses of their bacterial community structures showed marked differences between the two technologies for global communities but not for dominant phylotypes, and the domination of different bacterial phylotypes for the different operational conditions. Tetrasphaera genus was ubiquitous (1.1%–19.2% relative abundance) in both bioprocesses. Fodinibacter (0.04%–7.75%) was found to positively correlate with other dominant phylotypes, highlighting the relevance of Intrasporangiaceae family in membrane‐based technologies. Oligotypes distribution of dominant phylotypes showed that certain strains were favored at all operational conditions. Linkage with operational conditions determined that the presence/absence of carriers deeply impacted the relative abundance of dominant phylotypes. The results are relevant to discern the effect of operational conditions over bacterial communities in membrane‐based technologies. © 2018 American Institute of Chemical Engineers AIChE J, 65: 536–548, 2019

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Food‐processing wastes

Frenkel

Cummings

Maillacheruvu

et al. 2020

Water Environment Research

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Literature published in 2018 and literature published in 2019 related to food-processing wastes treatment for industrial applications are reviewed. This review is a subsection of the Treatment Systems section of the annual Water Environment Federation literature review and covers the following food-processing industries and applications: general, meat and poultry, fruits and vegetables, dairy and beverage, and miscellaneous treatment of food wastes.

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Evaluation of dairy processing wastewater biotreatment in an IASBR system: Aeration rate impacts on performance and microbial ecology

Cited by 31 publications

References 54 publications

Microbial Community Redundancy and Resilience Underpins High-Rate Anaerobic Treatment of Dairy-Processing Wastewater at Ambient Temperatures

Microbial Community Redundancy and Resilience Underpins High-Rate Anaerobic Treatment of Dairy-Processing Wastewater at Ambient Temperatures

Insight on the bacterial ecology in membrane bioreactor: Operational conditions effect over dominant ecological players

Food‐processing wastes

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