Recovery of dehydrated aerobic granules: A comparison

Lv, Yi; Wan, Chunli; Lee, Dong Hoon; Liu, Xiang; Zhang, Yi; Tay, Joo‐Hwa

doi:10.1016/j.biortech.2018.08.013

Cited by 15 publications

(3 citation statements)

References 22 publications

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“…The treatment capacity could then be increased while the capital and operational cost decrease [8]. Along with the AGS technology development, researchers have paid attention to selecting inoculum type, storage [9], and recovery of granular biomass [10,11] in order to unravel the role of seed sludge to shorten the granulation process and ob-tain healthy granules, thereby promote the long-term stable application of cultivated granules [12][13][14]. Nevertheless, it still requires more detailed research on AGS cultivation in the sequencing batch reactor (SBR) start-up period.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Recovery of Stored Granules to Promote Practical Wastewater Treatment by Aerobic Granular Sludge Process

Nguyen,

Dang

2023

J. of Wat. & Envir. Tech.

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Aerobic granular sludge (AGS) application for wastewater treatment has been proven to have high sludge-water separation efficiency, great treatment capacity, and strong tolerance to toxic and harmful substances. Nevertheless, the AGS storage and recovery issue has only been studied in a few research. This paper studied the optimized condition for reactivation of the AGS after 3 years storage in distilled water at 4°C. The initial results revealed that under the synthetic wastewater conditions of 450 ± 0.5 mg COD/L, 65 ± 0.2 mg NH 4 + -N/L, 15 ± 0.1 mg PO 4 3--P/L, and the DO concentration was controlled at 20% of the saturation oxygen, it took about 30 days to gain the same volume of AGS as before storage, but not the granular size. The aeration time was susceptible to the growth of bacterial aggregates. The optimum aeration time of 172 minutes was chosen to achieve up to 11.58 g/L MLSS and 46.73 mL/g SVI30. With that reactivated AGS, substantially high organic and nutrient removal efficiencies were obtained with 97.8%, 100%, and 86.7% for COD, NH 4 + -N, and PO 4 3--P, respectively. The future study will apply real domestic wastewater with different organic and nutrient loadings to test its stability and reproducibility in these specific culture conditions.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the Recovery of Stored Granules to Promote Practical Wastewater Treatment by Aerobic Granular Sludge Process

Nguyen,

Dang

2023

J. of Wat. & Envir. Tech.

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“…Between them, wet storage of AGS is adopted by most scholars, as there are large quantities of aquatic microbes that inhabit AGS (Tay et al., 2002; Zhu and Wilderer, 2003; Zhang et al., 2005; Zeng et al., 2007; Adav et al., 2009; Xu et al., 2010; Gao et al., 2012; Yuan et al., 2012; Wan et al., 2014a, Wan et al., 2014b; He et al., 2017). In contrast, limited studies of dry storage of AGS have thus far been reported (Hu et al., 2016; Cheng et al, 2018; Lv et al., 2018), and the dilemma is restricted mainly by complex sludge dewatering processes.…”

Section: Introductionmentioning

confidence: 99%

“…To elucidate the mechanism of AGS stability loss during storage, scholars tend to analyse the microbial community changes to infer the metabolic pathways involved. However, most studies were reported based on wet storage of AGS (Adav et al., 2009; Lv et al., 2013; Wan et al., 2014a, Wan et al., 2014b; He et al., 2017), and little relevant information could be found during dry storage of AGS (Lv et al., 2018). Interestingly, the stored AGS could be recovered to normal within several weeks after re-aeration as inoculated sludge (Zhang et al., 2005; Zeng et al., 2007; Gao et al., 2012; Yuan et al., 2012; Lv et al., 2018; Hu et al., 2016; He et al., 2017), while it usually takes months from floc to AGS.…”

Section: Introductionmentioning

confidence: 99%

Evolution of microbial community during dry storage and recovery of aerobic granular sludge

Zhang

Long

Wu³

et al. 2019

Heliyon

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A B S T R A C TAerobic granular sludge (AGS) was imbedded in agar and stored at 4 C for 30 days, and then the stored granules were recovered in a sequencing batch reactor fed real wastewater within 11 days. Variations in microbial community compositions were investigated during dry storage and recovery of AGS, aiming to elucidate the mechanism of granular stability loss and recovery. The storage and recovery of AGS involved microbial community evolution. The dominant bacterial genera of the mature AGS were Zoogloea (relative abundance of 22.39%), Thauera (16.03%) and Clostridium_sensu_stricto (11.17%), and those of the stored granules were Acidovorax (26.79%), Macellibacteroides (12.83%) and Pseudoxanthomonas (5.69%), respectively. However, the dominant genera were Streptococcus (43.64%), Clostridium_sensu_stricto (12.3.6%) and Lactococcus (11.47%) in the recovered AGS. Methanogens were always the dominant archaeal species in mature AGS (93.01%), stored granules (99.99%) and the recovered AGS (94.84%). Facultative anaerobes and anaerobes proliferated and dominated in the stored granules, and their metabolic activities gradually led to granular structure destruction and property deterioration. However, the stored granules served as carriers for the microbes originated from the real septic tank wastewater during recovery. They proliferated rapidly and secreted a large number of extracellular polymeric substances which helped to recover the granular structure in 11 days.

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Aerobic Granular Sludge

Dawen,

Nabi

2024

Springer Water

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Recovery of dehydrated aerobic granules: A comparison

Cited by 15 publications

References 22 publications

Evaluation of the Recovery of Stored Granules to Promote Practical Wastewater Treatment by Aerobic Granular Sludge Process

Evaluation of the Recovery of Stored Granules to Promote Practical Wastewater Treatment by Aerobic Granular Sludge Process

Evolution of microbial community during dry storage and recovery of aerobic granular sludge

Aerobic Granular Sludge

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