Uncover the secret of granule calcification and deactivation in up-flow anaerobic sludge bed (UASB) reactor with long-term exposure to high calcium

Chen, Linlin; Ji, Yatong; Yu, Zhuodong; Wang, Caiqin; Alvarez, Pedro J. J.; Xu, Xiangyang; Zhu, Liang

doi:10.1016/j.watres.2020.116586

Cited by 40 publications

(6 citation statements)

References 49 publications

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“…The up-flow anaerobic sludge blanket (UASB) systems were first proposed in the 1970s and, recently, the interest in using this technology has grown [ 1 ]. In the UASB process, the biomass is not of the flock type but of granular consistency due to a phenomenon in which microorganisms formed granular groups with a more compact structure, a higher dimension, higher density and higher settling capacity than in the conventional active sludge (CAS) [ 2 ]. The process is activated using selective environmental conditions that generate a spontaneous involvement of microorganisms commonly present in CAS [ 3 , 4 ].…”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…Several surface roughness parameters, i.e., arithmetic mean deviation (R a ) and root-mean-square deviation (R q ), were fitted. The valleys in the granules were visualized by interactive 3D surface plots generated with a plugin compatible with ImageJ (Prathibha et al, 2011;Chen et al, 2021).…”

Section: Analysis Of Biochar Surfacementioning

confidence: 99%

Remediation of Chromium-Contaminated Soil Based on Bacillus cereus WHX-1 Immobilized on Biochar: Cr(VI) Transformation and Functional Microbial Enrichment

Chen

Sun

et al. 2021

Front. Microbiol.

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Microorganisms are applied to remediate chromium (Cr)-contaminated soil extensively. Nevertheless, the microbial loss and growth inhibition in the soil environment restrain the application of this technology. In this study, a Cr(VI)-reducing strain named Bacillus cereus WHX-1 was screened, and the microbial aggregates system was established via immobilizing the strain on Enteromorpha prolifera biochar to enhance the Cr(VI)-reducing activity of this strain. The mechanism of the system on Cr(VI) transformation in Cr-contaminated soil was illuminated. Pot experiments indicated that the microbial aggregates system improved the physicochemical characteristics of Cr-contaminated soil obviously by increasing organic carbon content and cation exchange capacity, as well as decreasing redox potential and bulk density of soil. Moreover, 94.22% of Cr(VI) was transformed into Cr(III) in the pot, and the content of residue fraction Cr increased by 63.38% compared with control check (CK). Correspondingly, the physiological property of Ryegrass planted on the Cr-contaminated soil was improved markedly and the main Cr(VI)-reducing microbes, Bacillus spp., were enriched in the soil with a relative abundance of 28.43% in the microbial aggregates system. Considering more active sites of biochar for microbial aggregation, it was inferred that B. cereus WHX-1 could be immobilized by E. prolifera biochar, and more Cr(VI) was transformed into residue fraction. Cr stress was decreased and the growth of plants was enhanced. This study would provide a new perspective for Cr-contaminated soil remediation.

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“…In addition, hydrogenotrophic methanogenesis could support the formation of calcium phosphate by locally increasing the pH, because hydrogenotrophic methanogens are more resistant to ammonia toxicity and no H 2 was found in the biogas at any point [93]. Precipitation of calcium phosphate and carbonate and the involvement of calcium were similarly described in Cunha et al [41,42,62,94], Yu et al [95] and Chen et al [96] also showing the formation and growth of granules with high inorganic content. The ash content of granules larger than 2.5 mm diameter from R Ca was 49%, which is higher than the common ash content of anaerobic granules (15-40% ash [97,98]) and confirms the incorporation of precipitates.…”

Section: Effect Of Calcium On Phosphorus Recoverymentioning

confidence: 71%

“…When in excess, calcium can complex and precipitate with the substrates, increasing mass transfer limitations and slowing down biodegradation [153]. Calcium could also form inorganic precipitates and consequently limit the mass transport in the sludge, leading to slower degradation [95,96]. When comparing studies, the calcium concentration seemingly needs to be normalized for feed/substrate.…”

Section: The Relation Between Calcium and Organic Loading For Methane...mentioning

confidence: 99%

“…Calcium carbonate was previously identified as the main impurity in CaP granules from BW and PM treatment, but calcium phosphate was the primary precipitate [37,62]. Chen et al [96] found calcium carbonate as the primary precipitate in granules when treating synthetic wastewater and testing the addition of calcium. Zhang et al [89] could not qualify calcium carbonate with XRD measurements during the treatment of BW without calcium addition but found CaP granules.…”

Section: The Competition For Calcium Is Inhibiting Calcium Phosphate ...mentioning

confidence: 99%

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Recovery of phosphorus from animal manure

Schott

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Chapter 1. Introduction 1.1. The Neolithic Revolution -From 4 million to 200 million people in 10,000 years 1.2. The Green Revolution -From 1.5 billion to 6 billion people in 100 years 1.3. Consequences of intensification 1.4. Nutrient hotspots and livestock farming 1.5. Key nutrient: phosphorus 1.6. Phosphorus recovery 1.7. Challenges for calcium phosphate granulation in black water and transition to animal manure 1.8. Scope and outline Chapter 2. Phosphorus recovery from pig manure: Dissolution of struvite and formation of calcium phosphate granules during anaerobic digestion with calcium addition Abstract 2.1. Introduction 2.2. Materials and methods 2.3. Results 2.4. Discussion 2.5. Conclusions Chapter 3. Innovation in valorization of cow manure: Higher hydrolysis, methane production and increased phosphorus retention using UASB technology Abstract 3.1. Introduction 3.2. Materials and methods 3.3. Results and Discussion 3.4. Conclusions Chapter 4. Enabling efficient phosphorus recovery from cow manure: Liberation of phosphorus through acidification and recovery of phosphorus as calcium phosphate granules. Abstract 4.1. Introduction 4.2. Materials and methods 4.3. Results and discussion 4.4. Conclusions Chapter 5. Potential impact on calcium phosphate recovery by hydrogen in anaerobic digestion of cow manure Abstract 5.1. Introduction 5.2. Materials and Methods 5.3. Results and discussion 5.4. Conclusions Chapter 6. General discussion and outlook 6.1. Anaerobic digestion of animal manure using UASB technology 6.2. Phosphorus recovery and calcium phosphate granules 6.3. Mechanisms for calcium phosphate granulation in animal manure 6.4. Process optimization 6.5. Applicability and feasibility 6.6. Implementation and impact Summary References Supplementary information A. Appendix Chapter 2 B. Appendix Chapter 3 C. Appendix Chapter 4 D. Appendix Chapter 5 E.

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Uncover the secret of granule calcification and deactivation in up-flow anaerobic sludge bed (UASB) reactor with long-term exposure to high calcium

Cited by 40 publications

References 49 publications

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

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

Remediation of Chromium-Contaminated Soil Based on Bacillus cereus WHX-1 Immobilized on Biochar: Cr(VI) Transformation and Functional Microbial Enrichment

Recovery of phosphorus from animal manure

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