A semi-industrial scale AnMBR for municipal wastewater treatment at ambient temperature: performance of the biological process

Robles, Ángel; Jiménez-Benítez, A.; Giménez, Juan Bautista; Durán, Freddy; Ribes, J.; Serralta, J.; Ferrer, J.; Rogalla, Frank; Seco, A.

doi:10.1016/j.watres.2022.118249

Cited by 31 publications

(24 citation statements)

References 23 publications

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“…Evolution of biogas production, its methane content expressed in percentage of CH 4 , and removed COD (% COD rem ) can be found in supplementary materials. Moreover, details on the evolution of biogas production process in this demo plant during this operational period can be found in Robles et al [29], where it could be concluded that temperature, HRT, SRT and influent COD⋅SO 2 − 4 -S ratio showed crucial influence in biogas production. As already mentioned in Section 2.2, organic load and temperature varied according to economic activities and ambient conditions, respectively.…”

Section: Energy Assessmentmentioning

confidence: 89%

“…The evolution of HRT, temperature, and organic load available for methanogenesis (OL-MA) during the 580-days experimental operation can be found elsewhere in Robles et al [29] and in supplementary materials. Temperature varied freely in the 10-30 The number of membrane tanks in operation depended on the selected HRT, while OL-MA was affected by economic activity, mainly dairy and wine, the latter with a markedly seasonal contribution.…”

Section: Anmbr Operationmentioning

confidence: 99%

“…It should be noted that the significant sulfate content in the influent favors SRB growth, so that improved AnMBR energy performance could be expected when treating low-sulfate wastewater [29]. When no methane recovery was considered, the contribution of D-CH 4 to total emissions accounted for 0.5-0.6 kgCO 2eq ⋅m − 3 during almost the entire period of plant operation.…”

Section: Energy Assessmentmentioning

confidence: 99%

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A Semi-Industrial Anmbr Plant for Urban Wastewater Treatment at Ambient Temperature: Analysis of the Filtration Process, Energy Balance and Quantification of GHG Emissions

et al. 2022

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Section: Energy Assessmentmentioning

confidence: 89%

Section: Anmbr Operationmentioning

confidence: 99%

Section: Energy Assessmentmentioning

confidence: 99%

See 1 more Smart Citation

A Semi-Industrial Anmbr Plant for Urban Wastewater Treatment at Ambient Temperature: Analysis of the Filtration Process, Energy Balance and Quantification of GHG Emissions

et al. 2022

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“…Pilot- and full-scale IC systems have been implemented for the treatment of high-strength industrial wastewater (COD up to ∼10,000 mg·L –1 ) with robust performance (75%–95% COD removal at an organic loading rate of 15–25 COD·L –1 ·d –1 ). − AnMBRs are anaerobic reactors coupled with membrane filtration, where the inclusion of a membrane leads to efficient solids capture while also improving effluent quality over other mainstream anaerobic processes . Across pilot- and full-scale implementations (COD up to around 1500 mg·L –1 ), AnMBR systems have been reported to achieve around 90% or higher COD removal at a relatively high organic loading (∼2 g COD·L –1 ·d –1 ). − With the potential for high concentrations of microorganisms in both systems, the sequential use of IC followed by AnMBR has the potential to achieve robust performance and biogas production at high organic loading rates while eliminating the need for aeration. Thus, the new system reduces the capital and operating costs associated with WWT, and this advantage is expected to be more evident for high-strength wastewater.…”

Section: Introductionmentioning

confidence: 99%

Design of a High-Rate Wastewater Treatment Process for Energy and Water Recovery at Biorefineries

Kontos

Cabrera

et al. 2023

ACS Sustainable Chem. Eng.

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Industrial wastewaters rich in organic carbon have potential for value generation, but conventional, low-rate, anaerobic–aerobic wastewater treatment (WWT) processes often incur significant capital expenses and energy consumption. In this study, we leveraged experimental data for biorefinery-derived wastewaters to characterize the implications of transitioning from a conventional, low-rate process to a high-rate, multistage anaerobic process. We designed and simulated these WWT processes across seven first- and second-generation (1G/2G) biorefineries and evaluated the implications for biorefinery sustainability through techno-economic analysis (TEA) and life cycle assessment (LCA). Compared to the conventional design, the new process can substantially reduce capital costs and electricity usage. These improvements were particularly evident for 2G biorefineries, translating to 5%–13% lower minimum product selling prices (MPSPs) and 7%–135% lower 100-year global warming potentials (GWPs; the 135% reduction is due to the transition of one biorefinery from net emission [0.87 kg of CO2e·gal–1] to net sequestration [−0.31 kg of CO2e·gal–1]). Biorefineries could further reduce the MPSP through the renewable identification number (RIN) credits by upgrading and selling the biogas as renewable natural gas, but at the expense of increasing GWP. When normalized, the COD management cost ranged from $–56 to $465 per tonne of COD, indicating that wastewater could be a net source of revenue for some biorefineries.

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“…16 Yet, heating the entire feed stream beyond a certain temperature can be incompatible with biological processes that are temperature sensitive like anaerobic digesters. 17 In addition, since the volatility of VFAs dramatically increases below the pK a (∼4.3 for AA), acidifying the feed solution to a pH of about 3−4 is necessary for efficient VFA recovery. This further limits their use in biological reactors.…”

Section: ■ Introductionmentioning

confidence: 99%

High-Efficiency Recovery of Acetic Acid from Water Using Electroactive Gas-Stripping Membranes

Jung

Wang

et al. 2023

Environ. Sci. Technol.

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Recovery of carbon-based resources from waste is a critical need for achieving carbon neutrality and reducing fossil carbon extraction. We demonstrate a new approach for extracting volatile fatty acids (VFAs) using a multifunctional direct heated and pH swing membrane contactor. The membrane is a multilayer laminate composed of a carbon fiber (CF) bound to a hydrophobic membrane and sealed with a layer of polydimethylsiloxane (PDMS); this CF is used as a resistive heater to provide a thermal driving force for PDMS that, while a highly hydrophobic material, is known for its ability to rapidly pass gases, including water vapor. The transport mechanism for gas transport involves the diffusion of molecules through the free volume of the polymer matrix. CF coated with polyaniline (PANI) is used as an anode to induce an acidic pH swing at the interface between the membrane and water, which can protonate the VFA molecule. The innovative multilayer membrane used in this study has successfully demonstrated a highly efficient recovery of VFAs by simultaneously combining pH swing and joule heating. This novel technique has revealed a new concept in the field of VFA recovery, offering promising prospects for further advancements in this area. The energy consumption was 3.37 kWh/kg for acetic acid (AA), and an excellent separation factor of AA/water of 51.55 ± 2.11 was obtained with high AA fluxes of 51.00 ± 0.82 g.m–2hr–1. The interfacial electrochemical reactions enable the extraction of VFAs without the need for bulk temperature and pH modification.

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A semi-industrial scale AnMBR for municipal wastewater treatment at ambient temperature: performance of the biological process

Cited by 31 publications

References 23 publications

A Semi-Industrial Anmbr Plant for Urban Wastewater Treatment at Ambient Temperature: Analysis of the Filtration Process, Energy Balance and Quantification of GHG Emissions

A Semi-Industrial Anmbr Plant for Urban Wastewater Treatment at Ambient Temperature: Analysis of the Filtration Process, Energy Balance and Quantification of GHG Emissions

Design of a High-Rate Wastewater Treatment Process for Energy and Water Recovery at Biorefineries

High-Efficiency Recovery of Acetic Acid from Water Using Electroactive Gas-Stripping Membranes

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