Coupling high-rate activated sludge process with aerobic granular sludge process for sustainable municipal wastewater treatment

Kosar, Sadiye; Isik, Onur; Cicekalan, Busra; Gülhan, Hazal; Cingoz, Seyma; Yoruk, Mustafa; Özgün, Hale; Koyuncu, İsmail; Loosdrecht, Mark C.M. van; Erşahin, Mustafa Evren

doi:10.1016/j.jenvman.2022.116549

Cited by 16 publications

(3 citation statements)

References 39 publications

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“…An increase in the ratio of COD/TN in the influent from 6.98 (stage 1) to 9.65 (stage 2) led to an increase in both granule size and capacity of denitrification. A similar finding was found by Kosar et al ( 2023 ) that the ratio of nitrifiers to heterotrophs could rise and, denitrifiers could be dominated by typical aerobic heterotrophs due to the lack of available carbon in the influent and hence, the growth of granules might be hampered by a lack of adequate anoxic/anaerobic volume in the granule core. Sufficient carbon can be provided for denitrifiers by increasing the COD/TN ratio (Kosar et al 2023 ).…”

Section: Resultssupporting

confidence: 85%

Impact of food waste addition in energy efficient municipal wastewater treatment by aerobic granular sludge process

Cicekalan,

Berenji,

Aras

et al. 2024

Environ Sci Pollut Res

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Recently, one of the main purposes of wastewater treatment plants is to achieve a neutral or positive energy balance while meeting the discharge criteria. Aerobic granular sludge (AGS) technology is a promising technology that has low energy and footprint requirements as well as high treatment performance. The effect of co-treatment of municipal wastewater and food waste (FW) on the treatment performance, granule morphology, and settling behavior of the granules was investigated in the study. A biochemical methane potential (BMP) test was also performed to assess the methane potential of mono- and co-digestion of the excess sludge from the AGS process. The addition of FW into wastewater enhanced the nutrient treatment efficiency in the AGS process. BMP of the excess sludge from the AGS process fed with the mixture of wastewater and FW (195 ± 17 mL CH4/g VS) was slightly higher than BMP of excess sludge from the AGS process fed with solely wastewater (173 ± 16 mL CH4/g VS). The highest methane yield was observed for co-digestion of excess sludge from the AGS process and FW, which was 312 ± 8 mL CH4/g VS. Integration of FW as a co-substrate in the AGS process would potentially enhance energy recovery and the quality of effluent in municipal wastewater treatment. Graphical abstract

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Section: Resultssupporting

confidence: 85%

Impact of food waste addition in energy efficient municipal wastewater treatment by aerobic granular sludge process

Cicekalan,

Berenji,

Aras

et al. 2024

Environ Sci Pollut Res

Self Cite

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“…They have been optimized for the most commonly applied wastewater treatment solutions based on the use of suspended conventional activated sludge (CAS) [1]. A novel, alternative, and competitive technology is offered by the use of granular activated sludge (AGS) [2]. The strengths and advantages of this solution have spurred the interest of researchers, operators, and designers, which has consequently led to a growing number of commercial-scale installations [3,4].…”

Section: Introductionmentioning

confidence: 99%

Technological, Ecological, and Energy-Economic Aspects of Using Solidified Carbon Dioxide for Aerobic Granular Sludge Pre-Treatment Prior to Anaerobic Digestion

Kazimierowicz

Dębowski

Zieliński

2023

IJERPH

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The technology of aerobic granular sludge (AGS) seems prospective in wastewater bio-treatment. The characteristics as well as compactness and structure of AGS have been proved to significantly affect the effectiveness of thus far deployed methods for sewage sludge processing, including anaerobic digestion (AD). Therefore, it is deemed necessary to extend knowledge on the possibilities of efficient AGS management and to seek viable technological solutions for methane fermentation of sludge of this type, including by means of using the pre-treatment step. Little is known about the pre-treatment method with solidified carbon dioxide (SCO2), which can be recovered in processes of biogas upgrading and enrichment, leading to biomethane production. This study aimed to determine the impact of AGS pre-treatment with SCO2 on the efficiency of its AD. An energy balance and a simplified economic analysis of the process were also carried out. It was found that an increasing dose of SCO2 applied in the pre-treatment increased the concentrations of COD, N-NH4+, and P-PO43− in the supernatant in the range of the SCO2/AGS volume ratios from 0.0 to 0.3. No statistically significant differences were noted above the latter value. The highest unit yields of biogas and methane production, reaching 476 ± 20 cm3/gVS and 341 ± 13 cm3/gVS, respectively, were obtained in the variant with the SCO2/AGS ratio of 0.3. This experimental variant also produced the highest positive net energy gain, reaching 1047.85 ± 20 kWh/ton total solids (TS). The use of the higher than 0.3 SCO2 doses was proved to significantly reduce the pH of AGS (below 6.5), thereby directly diminishing the percentage of methanogenic bacteria in the anaerobic bacterial community, which in turn contributed to a reduced CH4 fraction in the biogas.

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“…Experiences combining HRAS and AGS systems are scarce. Kosar et al [30] treated a HRAS effluent in an AGS system at lab scale. Low COD-to-N ratio in the influent limited denitrification and caused high NO 3…”

Section: Introductionmentioning

confidence: 99%

Achieving Mainstream Partial Nitritation with Aerobic Granular Sludge Treating High-Rate Activated Sludge Effluent

Carbó,

Teixidó,

Canals

et al. 2024

Preprint

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Coupling high-rate activated sludge process with aerobic granular sludge process for sustainable municipal wastewater treatment

Cited by 16 publications

References 39 publications

Impact of food waste addition in energy efficient municipal wastewater treatment by aerobic granular sludge process

Impact of food waste addition in energy efficient municipal wastewater treatment by aerobic granular sludge process

Technological, Ecological, and Energy-Economic Aspects of Using Solidified Carbon Dioxide for Aerobic Granular Sludge Pre-Treatment Prior to Anaerobic Digestion

Achieving Mainstream Partial Nitritation with Aerobic Granular Sludge Treating High-Rate Activated Sludge Effluent

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