Anaerobic granule sludge formation and perchlorate reduction in an upflow anaerobic sludge blanket (UASB) reactor

Han, Yuechen; Guo, Jianbo; Zhang, Yuanyuan; Lian, Jing; Guo, Yihang; Song, Yuanyuan; Wang, Shaopo; Yang, Qing-Xiong

doi:10.1016/j.biteb.2018.09.012

Cited by 13 publications

(3 citation statements)

References 31 publications

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“…Industrial wastewater treatment is becoming more important every day [1][2][3]. The Upflow Anaerobic Sludge Bed (UASB) reactor is currently the most common reactor for treatment of industrial wastewaters [4].…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Mathematical Investigation of Anaerobic Granulate Density via Settling Velocity

Klasinc

Zupančič²,

Hriberšek

et al. 2022

Processes

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The objective of this study was to determine the density of anaerobic granules on different heights of a full-scale Upflow Anaerobic Sludge Bed reactor. The density was defined through the settling velocities of anaerobic granules, measured in a full-scale Upflow Anaerobic Sludge Bed reactor. In this study, granular density was calculated with the measured settling velocities and developed mathematical model. The developed mathematical model is based on the Stokes model. In the experiment, granules were taken from different heights of an Upflow Anaerobic Sludge Bed reactor, from 0.6 to 7.6 m. The granules’ diameters varied between 1 and 5 mm. The granules were taken from six different heights through the reactor. The settling velocity of the active granules (with gas in the granule pore and on the surface of the granule) was measured first. After the active granules’ settling velocity measurement, the granules were placed in a vortex to obtain degassed granules (granules without any gas in the pores or on the surface), for which the settling velocities were also measured later. It is shown that granules’ densities at different heights are independent of the reactor height.

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Section: Introductionmentioning

confidence: 99%

“…The drained density of granules used for treatment of effluent from a fruit and vegetable cannery was 1070 kg/m 3 , while granules used in breweries had drained densities of 1059 and 1056 kg/m 3 . Granules that treated protein-based wastewater had a drained density of 1042 kg/m 3 .…”

Section: Introductionmentioning

confidence: 99%

Experimental and Mathematical Investigation of Anaerobic Granulate Density via Settling Velocity

Klasinc

Zupančič²,

Hriberšek

et al. 2022

Processes

View full text Add to dashboard Cite

show abstract

“…The up-flow anaerobic sludge blanket (UASB) reactor is known for its high efficiency and flexibility, especially in treating high organic bio-refractory wastewater [11]. A significant advantage of the UASB process is that no support materials are required for the retention of active sludge, which can be achieved through the formation of settled granules [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Adaption strategy of up-flow anaerobic sludge blanket reactor on tetracycline stress during tetracycline antibiotic wastewater treatment

Zhang

Chen

Zhang

et al. 2021

Environmental Engineering Research

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Tetracycline antibiotic wastewater with high chemical oxygen demand (COD) concentration and containing biorefractory compounds was investigated in a lab-scale up-flow anaerobic sludge blanket (UASB) and anoxic-oxic (A/O) reactor. Specific methanogenic activity (SMA) was determined to reveal the inhibition levels of methane production and volatile fatty acid (VFA) accumulation. The results showed that microorganisms can adapt to tetracycline or oxytetracycline when the concentration of antibiotics is less than 400 mg/L. Acetic acid, propanoic acid, and n-butyric acid accounted for more than 90% of VFA with increasing antibiotic concentration from 50 mg/L to 600 mg/L. During the 215 days of operation, the concentration of tetracycline antibiotic increased from 0 to 95 mg/L, and the COD concentration from 3500 to 6,500 mg/L. The average COD and tetracycline antibiotic removal rates of the reactors were maintained above 90%. The methane production of the UASB reactor achieved 0.32 L/g COD. VFA accumulation was observed when tetracycline antibiotic concentration increased to 47.5 mg/L. The sludge granule diameter increased from 0-300 μm to 300-1,500 μm during the operation. Rod-shaped and coccus-shaped organisms with pores and internal channels on the granule surface were observed using scanning electron microscopy. In the internal space, methanogenic filamentous bacteria constitute a rock-steady structure.

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Efficacy of a Fine Bubble Diffuser in Enhancing Attached Biofilm Hydrogenotrophic Denitrification Reactor Performance

Kamei

Narushima

Kodera

et al. 2023

Water Air Soil Pollut

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The efficacy of a fine bubble (FB) diffuser in enhancing the performance of an attached biofilm hydrogenotrophic denitrification (HD) reactor was evaluated. HD reactors equipped with an FB diffuser (FB reactor) and an air stone (AS) diffuser that produced ordinary bubbles (AS reactor) were operated in parallel at different hydraulic retention times (HRTs) in a synthetic groundwater treatment experiment. A reduction in H2 consumption of approximately 77% was achieved using the FB diffuser to reach a gas-liquid mass transfer coefficient similar to that of the AS diffuser. The high gas dissolution efficiency of the FB diffuser resulted in an effective nitrogen removal rate (NRR) enhancement, requiring less H2 supply. The highest value of NRR at 53.0±9.8 g-N/m3/d was obtained in the FB reactor at a minimum HRT of 3 h, which was two-fold higher than the corresponding value from the AS reactor. The FB reactor also had the lowest requirement of H2 for denitrification reaching 0.1 m3-H2/g-N in this condition, which was ten-fold lower than that in the AS reactor. Furthermore, the suspended sludge concentration in the FB reactor was lower than that in the AS reactor, indicating that the application of the FB diffuser can minimize excess suspended sludge accumulation inside the HD reactor. Microbial community analysis showed the predominance of Thauera spp. reaching a relative abundance of 15.7–27.3% in the FB reactor, suggesting a contribution to the HD. This finding can provide insight into the application of the FB diffuser for optimizing nitrate-contaminated groundwater treatment technology by HD.

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Anaerobic granule sludge formation and perchlorate reduction in an upflow anaerobic sludge blanket (UASB) reactor

Cited by 13 publications

References 31 publications

Experimental and Mathematical Investigation of Anaerobic Granulate Density via Settling Velocity

Experimental and Mathematical Investigation of Anaerobic Granulate Density via Settling Velocity

Adaption strategy of up-flow anaerobic sludge blanket reactor on tetracycline stress during tetracycline antibiotic wastewater treatment

Efficacy of a Fine Bubble Diffuser in Enhancing Attached Biofilm Hydrogenotrophic Denitrification Reactor Performance

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