Linking nitrifying biofilm characteristics and nitrification performance in moving-bed biofilm reactors for polluted raw water pretreatment

Zhang, Shuangfu; Wang, Yayi; He, Weitao; Xing, Meiyan; Wu, Min; Yang, Jian; Gao, Naiyun; Sheng, Guangyao; Yin, Daqiang; Liu, Shanhu

doi:10.1016/j.biortech.2013.07.056

Cited by 23 publications

(7 citation statements)

References 29 publications

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“…The characteristics of the four PE cylinders are shown in Table 1. The filling ratio of the carriers was set at 50% in this study [19,34]. During the system operation, NH 4…”

Section: Reactor Set-up and Operationmentioning

confidence: 99%

“…The suspended carrier is the core of the MBBR process and provides a place for microorganisms to attach and grow. There are many types of suspended carries used in MBBR practice such as polyethylene (PE) [18,19], polypropylene (PP) [20], polyurethane (PU) [21], ceramsite [22], diatomite [23], and Poly (vinyl alcohol) hydrogels (PVA gel) [24]. Among these, PE has been widely used due to its good performance.…”

Section: Introductionmentioning

confidence: 99%

“…The removal rates of N and Mn 2+ were 77.44% and 61.28%, respectively. Zhang et al [19] used PE (inclination angle 60 • , filling rate 50%) as the MBBR carrier to treat ammonia nitrogen wastewater with 71.4 ± 26.9% being obtained. Yuan et al [21] used denitrification-MBBR to treat the WWTP effluent with PE, PP, PU, and ceramsite as the carriers.…”

Section: Introductionmentioning

confidence: 99%

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Comparative Study of Denitrifying-MBBRs with Different Polyethylene Carriers for Advanced Nitrogen Removal of Real Reverse Osmosis Concentrate

Wang

et al. 2020

IJERPH

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Nitrogen (N) remains a great challenge in wastewater treatment while attempts to remove N has continuously been a research point for decades. In this study, the long-term performance of four identical-shape denitrification MBBRs (moving bed biofilm reactors) with four different configurations of cylindrical polyethylene as carriers (Φ25 × 12, Φ25 × 4, Φ15 × 15, and Φ10 × 7 mm) for advanced N removal of real reverse osmosis concentrate was investigated in great detail. The N of the real concentrate can be effectively removed by denitrification MBBRs when the pH, temperature, hydraulic retention time (HRT), C/N ratio, and filling rate are 7.50–8.10, 24~26 °C, 12 hours, 6.6, and 50%, respectively. The results showed that the MBBR with the Φ15 × 15 poly-carrier had the best removal efficiency on NO3-–N (78.0 ± 15.8%), NO2-–N (43.79 ± 9.30%), NH4+–N (55.56 ± 22.28%), and TN (68.9 ± 12.4%). The highest biomass of 2.13 mg/g-carrier was in the Φ15 × 15 poly-carrier was compared with the other three carriers, while the genes of the Φ15 × 15 poly-carrier reactor were also the most abundant. Proteobacteria was the most abundant phylum in the system followed by Bacteroidetes and then Firmicutes. The entire experiment with various parameter examination supported that Φ15 × 15 poly-carrier MBBR was a promising system for N removal in high strength concentrate. Despite the lab-scale trial, the successful treatment of high strength real reverse osmosis concentrate demonstrated the reality of the treated effluent as possible reclaimed water, thus providing a good showcase of N-rich reverse osmosis concentrate purification in practical application.

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“…The characteristics of the four PE cylinders are shown in Table 1. The filling ratio of the carriers was set at 50% in this study [19,34]. During the system operation, NH 4…”

Section: Reactor Set-up and Operationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparative Study of Denitrifying-MBBRs with Different Polyethylene Carriers for Advanced Nitrogen Removal of Real Reverse Osmosis Concentrate

Wang

et al. 2020

IJERPH

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“…Since the carrier material employed in MBBR processes effect the attachment and distribution characteristics of the biofilm, it is interesting to understand how the type of support media will influence the activity of nitrifiers in situations where overgrowth of heterotrophs takes place, such information may potentially be used in the selection of appropriate biofilm carriers for MBBRs treating high loaded wastewaters [4]. Most of the studies on MBBR up to now, focused on optimizing its performance, such as the optimal filling degree [25], effect of carrier geometry [26] or microbial community structure [27]. There are lacks of studies, which investigate the biofilm structure development on the carriers in MBBR system, which is fed by particulate substrate (e.g.…”

Section: Introductionmentioning

confidence: 99%

Effect of slow biodegradable substrate addition on biofilm structure and reactor performance in two MBBRs filled with different support media

Ashrafi

Allahyari

Torresi

et al. 2019

Environmental Technology

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In this study, two moving-bed biofilm reactors (MBBR1 and MBBR2) filled with different size of carrier media (Kaldnes K1 and Kaldnes K1 micro, respectively) were subjected to soluble (sugar and sodium acetate (Ac)) substrate and mixture of soluble and particulate (particulate potato starch (PS)) substrate in a very high organic loading rate (12 kgCOD/m 3 •d) at different temperatures (26 and 15˚C, in MBBR1 and MBBR2, respectively). The effects of carrier type and substrate on biofilm structure and reactor performance have been studied. Starch was removed by adsorption at the biofilm surface and hydrolyzed which caused substrate gradient in MBBR1, however, hydrolyzed uniformly within biofilm in MBBR2. The biofilm of MBBR1 was irregular due to filamentous structure growth due to the substrate gradient, while, it was regular in MBBR2 due to uniform distribution of substrate. The performance of both MBBRs in ammonium, COD and TN removal decreased significantly when the amount of small particles in the reactor increased owing to feeding by starch, which led to biomass density decline. The type of media affected the quantity and distribution of attached biomass, which in turn influenced the activity of specific microbial functional groups in the biofilm. The biofilm in MBBR2 was thicker and consequently nitrogen removal by denitrification was much higher. Lower temperature did not affect negatively the reactor performance in MBBR2.

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“…As the biocarrier is the key factor influencing the quantity and distribution of attached biomass and sequentially affecting nitrification and the denitrification processes in an MBBR (Zhang et al, 2013;Young et al, 2016), it is necessary to investigate the nitrogen removal behavior of the attached-growth biomass (AGB) on the biocarriers. To date, however, nitrification and denitrification rates of sponge biocarriers in an aerobic MBBR have not been examined.…”

Section: Introductionmentioning

confidence: 99%

Behavior of nitrogen removal in an aerobic sponge based moving bed biofilm reactor

Zhang

Song

Guo

et al. 2017

Bioresource Technology

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This study aims to investigate the behavior of nitrogen removal in an aerobic sponge based moving bed biofilm reactor by evaluating nitrification and denitrification rates of sponge biocarriers from three aerobic moving bed biofilm reactors (MBBRs) with filling ratios of 10% (R-10), 20% (R-20) and 30% (R-30). Results showed that the highest removal efficiencies of total nitrogen in three reactors were 84.5% (R-10), 93.6% (R-20) and 95.3% (R-30). Correspondingly, simultaneous nitrification and denitrification rate (SND) was 90.9%, 97.6% and 100%, respectively. Although R-20 had the highest attached-growth biomass (AGB) per gram of sponge compared to the other two reactors, R-30 showed the maximum ammonium oxidation rate (AOR) (2.1826±0.0717mgNH-N/gAGB/h) and denitrification rate (DNR) (5.0852±0.0891mgNO-N/gAGB/h), followed by R-20 and R-10. These results indicated AOR, DNR and AGB were affected by the filling ratio under the same operation mode.

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Linking nitrifying biofilm characteristics and nitrification performance in moving-bed biofilm reactors for polluted raw water pretreatment

Cited by 23 publications

References 29 publications

Comparative Study of Denitrifying-MBBRs with Different Polyethylene Carriers for Advanced Nitrogen Removal of Real Reverse Osmosis Concentrate

Comparative Study of Denitrifying-MBBRs with Different Polyethylene Carriers for Advanced Nitrogen Removal of Real Reverse Osmosis Concentrate

Effect of slow biodegradable substrate addition on biofilm structure and reactor performance in two MBBRs filled with different support media

Behavior of nitrogen removal in an aerobic sponge based moving bed biofilm reactor

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