Finding Knowledge Gaps in Aerobic Granulation Technology

Sarma, Saurabh Jyoti; Tay, Joo‐Hwa; Chu, Angus

doi:10.1016/j.tibtech.2016.07.003

Cited by 178 publications

(62 citation statements)

References 72 publications

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Section: Resultsmentioning

confidence: 99%

“…Efforts have been made to develop a predictable granulation process by shifting engineering parameters such as shear force, selection pressure, substrate concentration, reactor configuration, among others. 19 However, studies have shown variations in granules formation time, size and settleability characteristics (Table 3). Previous studies have showed that granules cultivated with domestic wastewater in pilot-and full-scale systems achieved similar diameter sizes of approximately 0.3 mm, 1,20,21 while granules from synthetic influent are cultivated more rapidly and achieved larger sizes with better settling ability.…”

Section: Aerobic Granule Formationmentioning

confidence: 99%

See 1 more Smart Citation

Microbial pathways of nitrogen removal in aerobic granular sludge treating domestic wastewater

Guimarães

Mezzari

Daudt

et al. 2017

J. Chem. Technol. Biotechnol

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BACKGROUND Aerobic granular sludge (AGS) technology has been widely investigated for wastewater treatment. The morphological and structural characteristics of granules and nitrogen pathways have not been fully clarified using real domestic wastewater. To address this issue, microbial community distribution, diversity and functional pathways towards nitrogen conversions in a sequencing batch reactor were investigated. RESULTS Granules (d ∼ 300 µm) were formed with low‐strength domestic wastewater (COD influent < 200 mg CODsoluble L−1). COD and ammonium effluent concentrations (55 mgCOD L−1, 14 mgNH4−‐N L−1) achieved national treatment standards. Nitrite accumulation was observed (16.5 mgNO2−‐N L−1) and N2O emissions (2.8% of nitrogen load) were detected. Granules were composed of protozoa and bacteria, with an outer layer dominated by ammonium‐oxidizing bacteria (AOB) and deeper layers with nitrite‐oxidizing bacteria (NOB) and denitrifiers. Partial nitrification, denitrification via nitrite, nitrifier denitrification, complete and incomplete denitrification pathways were assessed by qPCR. CONCLUSIONS AGS process showed the establishment of partial nitrification in a low‐strength real wastewater condition. The granular system showed N2O emission in a lower range than others known partial nitrification processes. In order to achieve nitrogen removal saving costs in terms of energy and space, engineering wastewater designers can consider AGS as an attractive technology. © 2016 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Aerobic Granule Formationmentioning

confidence: 99%

Microbial pathways of nitrogen removal in aerobic granular sludge treating domestic wastewater

Guimarães

Mezzari

Daudt

et al. 2017

J. Chem. Technol. Biotechnol

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“…This might be due to high COD/TP ratio in the bioreactor, in which glycogen-accumulating organisms are encouraged to accumulate in sludge. 7 The glycogen-accumulating organisms are considered as carbon competitors for polyphosphate-accumulating organisms because of their anaerobically organic carbon uptake in the same manner as polyphosphate-accumulating organisms perform, without PO 4 3− conversion. The process showed an increasing trend of TP removal after increasing the operation time to 24 h (phase II), during which AGSBR could use up 99% of P-constituents (TP in effluent was below 1 mg L −1 ).…”

Section: Phosphorus Removalmentioning

confidence: 99%

“…Conventional nitrification and denitrification processes using activated sludge systems are not able to efficiently remove nitrogen and phosphorus. 4 Furthermore, the processes are very cost-intensive due to land area requirements, high aeration rates and external carbon sources for denitrification. Therefore, in order to improve the existing methods, downstream treatment processes such as biological nutrients removal are required.…”

Section: Introductionmentioning

confidence: 99%

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Ammonia and phosphorus removal from mixture of treated and raw cattle manure wastewater in a low‐O₂ granular sequencing batch reactor

Matinfar

Mohammadi

Najafpour

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: In this study, the feasibility of an aerobic granular sequencing batch reactor (AGSBR) for elimination of nutrients at low dissolved oxygen (DO) level was investigated. It was fed by a mixture of treated and raw cattle manure wastewater. The behaviour of the AGSBR was assessed at different chemical oxygen demand (COD)/NH 4 + -N ratios, feeding strategies (dump-fill and slow-rate feeding) and hydraulic retention times (24, 32 and 48 h). For a duration of 140 days, the capability of the AGSBR for reducing COD, ammonia and total phosphorus (TP) contents was studied. At DO concentrations of 0.3-1.0 mg L −1 , the effect of different COD/NH 4 + ratios (100:3-100:10) was evaluated. RESULTS:A COD/NH 4 + -N ratio of 100:10 resulted in higher nitrification rate (0.0714 gN gMLVSS −1 day −1 ) compared to a ratio of >100:3 (0.0175 gN gMLVSS −1 day −1 ). The active granular sludge in dump-filling mode revealed better settling properties compared to the slow feeding rate. Microscopic observation of aerobic granules showed that the core of granules was dominantly occupied by filamentous microorganisms. Finally, at optimum conditions, removal efficiencies of NH 4 + -N, TP and COD were 99.9, 99 and 79%, respectively. CONCLUSIONS: Applying the AGSBR at low DO is promising as a cost-effective technique for the secondary treatment of livestock wastewaters. /jctb 60.5% when COD/TP was changed from 54:1 (run 77) to COD/TP of 133:1 (run 82). Besides, TP removal efficiency reached to its maximum level when the steady state occurred in ending runs. This might be due to the full dominance of phosphate-accumulating

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Aerobic Granular Sludge: Perspectives for Excess Sludge Management and Resource Recovery

Dababat,

Enaime,

Wichern

et al. 2023

Chemie Ingenieur Technik

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Aerobic granular sludge (AGS) technology is gaining increasing interest globally. However, several aspects are still challenging its installation, as the integration into existing municipal wastewater treatment plants. The operation of AGS units in continuous flow mode could facilitate that integration; yet has only been experienced at lab and pilot scales. Further, handling of excess granular sludge constitutes a prominent challenge. Even that, adopting effective strategies for its management holds promising contributions to the circular economy by fostering the reuse and recovery of valuable resources. The recovery of phosphorus and alginate‐like polymers holds significant commercial potential worldwide, with broad applications in agriculture, food, pharmaceuticals, and biotechnology.

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Finding Knowledge Gaps in Aerobic Granulation Technology

Cited by 178 publications

References 72 publications

Microbial pathways of nitrogen removal in aerobic granular sludge treating domestic wastewater

Microbial pathways of nitrogen removal in aerobic granular sludge treating domestic wastewater

Ammonia and phosphorus removal from mixture of treated and raw cattle manure wastewater in a low‐O₂ granular sequencing batch reactor

Aerobic Granular Sludge: Perspectives for Excess Sludge Management and Resource Recovery

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Finding Knowledge Gaps in Aerobic Granulation Technology

Cited by 178 publications

References 72 publications

Microbial pathways of nitrogen removal in aerobic granular sludge treating domestic wastewater

Microbial pathways of nitrogen removal in aerobic granular sludge treating domestic wastewater

Ammonia and phosphorus removal from mixture of treated and raw cattle manure wastewater in a low‐O2 granular sequencing batch reactor

Aerobic Granular Sludge: Perspectives for Excess Sludge Management and Resource Recovery

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Ammonia and phosphorus removal from mixture of treated and raw cattle manure wastewater in a low‐O₂ granular sequencing batch reactor