Effects of granular activated carbon and Fe-modified granular activated carbon on anammox process start-up

Lu, Guangsong; Ma, Yunqian; Zang, Lihua; Sun, Yuankui; Yu, Fei; Xue, Rong

doi:10.1039/d1ra00384d

Cited by 23 publications

(5 citation statements)

References 52 publications

(47 reference statements)

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“…Although activated carbon and anthracite are smaller than 2 mm, they have been widely used and proven efficient in biofiltration (Zielina, 2011) and were therefore retained in the study to maximize surface differences. Activated carbon has also been used in several AnAOB reactors to enhance AnAOB retention (Lu et al, 2021; Zhang et al, 2015). The surface area varied across media types from low surface area (sand and lava rock), to medium (expanded clay and plastic K1 carrier), to high (activated carbon).…”

Section: Resultsmentioning

confidence: 99%

“…PdNA has been applied as an integrated final anoxic zone within biological nutrient removal systems (Ali et al, 2020; Ladipo‐Obasa et al, 2020; Le et al, 2019; Shi et al, 2019; Zhou et al, 2020) and in separate sludge systems (Campolong et al, 2019; Du, Cao, et al, 2019; Sharp et al, 2017; Zhang et al, 2019). So far, there are limitations in current studies of PdNA application in filters which were mostly done under synthetic conditions (Lu et al, 2021; Ma et al, 2020), unrepresentative loading rates (150‐ to 500‐g N/m 3 /day) due to small‐scale setups with exclusion of the impacts of backwash (Cao et al, 2019; Cui et al, 2020; Lu et al, 2021; Ma et al, 2020; Polli, 2019), and achieved low nitrogen removal rates (100‐ to 484‐g N/m 3 /day) (Cao et al, 2019; Cui et al, 2020; Lu et al, 2021; Ma et al, 2020; Polli, 2019) or high effluent concentrations (7‐ to 10‐mg N/L) (Cui et al, 2020; Ma et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Media selection for anammox‐based polishing filters: Balancing anammox enrichment and retention with filtration function

Fofana

Peng

Huynh

et al. 2022

Water Environment Research

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Retrofitting conventional denitrification filters into partial denitrification‐anammox (PdNA)‐ or anammox (AnAOB)‐based filters will reduce the needs for external carbon addition. The success of AnAOB‐based filters depends on anammox growth and retention within such filters. Studies have overlooked the importance of media selection and its impact on AnAOB capacity, head loss progression dynamics, and shear conditions applied onto the AnAOB biofilm. The objective of this study was to evaluate viable media types (10 types) that can enhance AnAOB rates for efficient nitrogen removal in filters. Given the higher backwash requirement and lower AnAOB capacity of the conventionally used sand, expanded clay (3–5 mm) was recommended for AnAOB‐based filters in this study. Owing to its surface characteristics, expanded clay had higher AnAOB activity (304‐ vs. 104‐g NH4+‐N/m2/day) and higher AnAOB retention (43% more) than sand. Increasing the iron content of expanded clay to 37% resulted in an increase in zeta potential, which led to 56% more anammox capacity compared to expanded clay with 7% iron content. This work provides insight into the importance of media types in the growth and retention of AnAOB in filters, and this knowledge could be used as basis in the development of PdNA filters. Practitioner Points Expanded clay showed the lowest head loss buildup and most likely will result in longer runtime for full‐scale PdNA applications The highest AnAOB rates were achieved in expanded clay types and sand compared with smaller media typically used in biofiltration Expanded clay resulted in better AnAOB retention under shear, whereas sand could not withstand shear and required more frequent backwashing Expanded clay iron coating enhanced AnAOB enrichment and retention, most likely due to increased surface roughness and/or positive charge

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Media selection for anammox‐based polishing filters: Balancing anammox enrichment and retention with filtration function

Fofana

Peng

Huynh

et al. 2022

Water Environment Research

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“…Considering that anammox bacteria growth is generally slow [ 76 ], researchers try to speed up the process of adding carriers. For instance, Lu et al [ 77 ] evaluated the effects on anammox bacteria growth of the addition of GAC and Fe-modified GAC in UASB reactor finding that carriers addition can increase the aggregation of anammox microorganism and strongly reduce the start-up period of the system from 108 d to 94 d (in case of GAC) and to 83 d (in case of Fe-modified GAC).…”

Section: Resultsmentioning

confidence: 99%

Applications of Up-Flow Anaerobic Sludge Blanket (UASB) and Characteristics of Its Microbial Community: A Review of Bibliometric Trend and Recent Findings

Collivignarelli

Abbà

Caccamo

et al. 2021

IJERPH

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The interest in research on up-flow anaerobic sludge blanket (UASB) reactors is growing. The meta-analysis of bibliometric data highlighted the growing interest in four diverse topics: (i) energy recovery production; (ii) combination with other treatments; (iii) the study of processes for the removal of specific pollutants and, (iv) characterization of microbial community and granular sludge composition. In particular, the papers published in the first 6 months of 2021 on this process were selected and critically reviewed to highlight and discuss the results, the gaps in the literature and possible ideas for future research. Although the state of research on UASB is to be considered advanced, there are still several points that will be developed in future research such as the consolidation of the results obtained on a semi-industrial or real scale, the use of real matrices instead of synthetic ones and a more in-depth study of the effect of substances such as antibiotics on the microbiota and microbiome of UASB granular biomass. To date, few and conflicting data about the environmental footprint of UASB are available and therefore other studies on this topic are strongly suggested.

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“…It seemed that biochar served as a habitat for Denitratisoma which are heterotrophic denitrifying bacteria participating in nitrogen removal. Lu et al (2021) reported that the relative abundance of Denitratisoma increased in the granulated activated carbon supplemented up-flow anaerobic sludge blanket reactors compared to the control (without activated carbon). Within this framework, the relative percentage of the genus of Diaphorobacter from Comamonadaceae family which is a facultative heterotrophic denitrifier was higher in the biochar fixed biomass and particularly in the loosly–bound fraction (S1 = 0.53%; L1 = 1.3%; T1 = 0.61%) than that in suspended fraction of R0 (S0 = 0.1%).…”

Section: Resultsmentioning

confidence: 98%

Role of biochar in anaerobic microbiome enrichment and methane production enhancement during olive mill wastewater biomethanization

Abid

Karray

Kallel

et al. 2023

Front. Bioeng. Biotechnol.

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The current research work attempted to investigate, for the first time, the impact of biochar addition, on anaerobic digestion of olive mill wastewater with different initial chemical oxygen demand loads in batch cultures (10 g/L, 15 g/L, and 20 g/L). Methane yields were compared by applying one-way analysis of variance (ANOVA) followed by post-hoc Tukey’s analysis. The results demonstrated that adding at 5 g/L biochar to olive mill wastewater with an initial chemical oxygen demand load of 20 g/L increased methane yield by 97.8% and mitigated volatile fatty acid accumulation compared to the control batch. According to the results of microbial community succession revealed by the Illumina amplicon sequencing, biochar supplementation significantly increased diversity of the microbial community and improved the abundance of potential genera involved in direct interspecies electron transfer, including Methanothrix and Methanosarcina. Consequently, biochar can be a promising alternative in terms of the recovery of metabolic activity during anaerobic digestion of olive mill wastewater at a large scale.

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Effects of granular activated carbon and Fe-modified granular activated carbon on anammox process start-up

Abstract: In this study, granular activated carbon (GAC) and Fe-modified granular activated carbon (FeGAC) prepared by ultrasonic impregnation method were added into respective up-flow anaerobic sludge blanket (UASB) reactors to explore their effects on the anammox process start-up.

Cited by 23 publications

References 52 publications

Media selection for anammox‐based polishing filters: Balancing anammox enrichment and retention with filtration function

Media selection for anammox‐based polishing filters: Balancing anammox enrichment and retention with filtration function

Applications of Up-Flow Anaerobic Sludge Blanket (UASB) and Characteristics of Its Microbial Community: A Review of Bibliometric Trend and Recent Findings

Role of biochar in anaerobic microbiome enrichment and methane production enhancement during olive mill wastewater biomethanization

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