Anaerobic digestion of municipal sewage under psychrophilic conditions

León, Esteban Serrano; Perales, José A.; Corona, Enrique Lara; Arbib, Zouhayr; Rogalla, Frank; Boizán, Maikel Fernández

doi:10.1016/j.jclepro.2018.07.060

Cited by 40 publications

(13 citation statements)

References 27 publications

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“…The high-rate AD of municipal sewage at low temperatures of 17 • C and 19 • C showed that HRT below 10 h showed a slow hydrolysis rate and lower CH 4 yield, whereas 14 h HRT was found to be effective with increased CH 4 yields of 117 and 136 ml CH 4 g -1 COD removed at 17 • C and 19 • C, respectively. This clearly shows that a longer HRT has a positive impact on the AD process, resulting in higher CH 4 production [55].…”

Section: Increasing Hrt and Lowering Olrmentioning

confidence: 83%

Household biogas technology in the cold climate of low-income countries: a review of sustainable technologies for accelerating biogas generation

Lohani,

Shaw,

Shrestha

et al. 2024

Prog. Energy

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Low-income countries have long benefited from household biogas plants for extracting clean energy and fertilizer. Despite the popularity, such ordinary plants do not have heating systems and suffer lower biogas production in cold regions or cold winters. This paper attempts a comprehensive review on research and development of household biogas technology in cold climate. This review specifically highlights the influence of temperature on biogas production, and technologies and recent advances in psychrophilic biogas production. Such measures are introduction of adapted inoculums, maneuvering operational parameters like hydraulic retention time (HRT) and organic loading rate (OLR), co-digestion approach and additives and digester designs. In addition to that, the review portrays adoption of low-cost heating arrangements including construction of greenhouse over bio-digesters, digester insulation, and integration of solar heating is crucial to enhance biogas production. Furthermore, this review identified gaps in the operation of bio-digesters under psychrophilic temperature in low-income countries and recommends operational consistencies in full scale psychrophilic biogas plants through development of standards, operational guidelines, and users' trainings.

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Section: Increasing Hrt and Lowering Olrmentioning

confidence: 83%

Household biogas technology in the cold climate of low-income countries: a review of sustainable technologies for accelerating biogas generation

Lohani,

Shaw,

Shrestha

et al. 2024

Prog. Energy

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“…The removal tests of dyes molecules from aqueous solution using the PC@alginate particles were conducted using a batch system. The effects of pH on the adsorption of dyes onto PC@alginate were investigated using 40 mL (10 mg L À1 ) at different pHs (3)(4)(5)(6)(7)(8)(9)(10)(11)(12). The pH of the solution was adjusted by adding small amounts of HCl (0.1 M) and NaOH (0.1 M) aqueous solutions to various PC@alginate dispersions.…”

Section: Mb Molecule Removal Experimentsmentioning

confidence: 99%

“…Many techniques including adsorption and anaerobic digestion have been used to degrade these pollutants. [5][6][7][8][9][10][11][12][13][14][15][16][17][18] However, these techniques are generally limited when applied separately, requiring coupling and/or hybrid processes. 5 To better understand the complexity of agri-food waste treatment based on single techniques, the anaerobic digestion process (AD) was taken as an example.…”

Section: Introductionmentioning

confidence: 99%

Core–shell architecture based on bio-sourced porous carbon: the shape formation mechanism at the solid/liquid interface layer

2019

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“…In cold-to-temperate regions (sewage temperature occasionally ranging from 10 to 20 • C), UASB suffers from some specific limitations: with temperature below 20 • C, undigested sludge may accumulate in the blanket, and processing performance could decrease considerably [32]. This may induce large seasonal variations in UASB-based WWTPs, with COD removal efficiency oscillating by up to 40% between summer and winter operations [33]. Many studies have been carried out to investigate UASB performance at below mesophilic conditions; however, most of them concern small-scale bench or pilot test reactors [34].…”

Section: Introductionmentioning

confidence: 99%

UASB Performance and Perspectives in Urban Wastewater Treatment at Sub-Mesophilic Operating Temperature

Cecconet

Callegari

Capodaglio

2022

Water

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UASBs present several advantages compared to conventional wastewater treatment processes, including relatively low construction cost facilities, low excess sludge production, plain operation and maintenance, energy generation in the form of biogas, robustness in terms of COD removal efficiency, pH stability, and recovery time. Although anaerobic treatment is possible at every temperature, colder climates lead to lower process performance and biogas production. These factors can be critical in determining the applicability and sustainability of this technology for the treatment of urban wastewater at low operating temperature. The purpose of this study is the performance evaluation of a pilot-scale (2.75 m3) UASB reactor for treatment of urban wastewater at sub-mesophilic temperature (25 °C), below the optimal range for the process, as related to biogas production and organic matter removal. The results show that, despite lower methane production and COD removal efficiency compared to operation under ideal conditions, a UASB can still achieve satisfactory performance, and although not sufficient to grant effluent discharge requirements, it may be used as a pretreatment step for carbon removal with some degree of energy recovery. Options for UASB pretreatment applications in municipal WWTPs are discussed.

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Anaerobic digestion of municipal sewage under psychrophilic conditions

Cited by 40 publications

References 27 publications

Household biogas technology in the cold climate of low-income countries: a review of sustainable technologies for accelerating biogas generation

Household biogas technology in the cold climate of low-income countries: a review of sustainable technologies for accelerating biogas generation

Core–shell architecture based on bio-sourced porous carbon: the shape formation mechanism at the solid/liquid interface layer

UASB Performance and Perspectives in Urban Wastewater Treatment at Sub-Mesophilic Operating Temperature

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