Influence of Carrier Filling Ratio on the Advanced Nitrogen Removal from Wastewater Treatment Plant Effluent by Denitrifying MBBR

Ying, Zhao; Yuan, Quan; He, Zan; Wang, Haiyan; Yan, Guokai; Chang, Yang; Chu, Zhaosheng; Ling, Yu; Wang, Huan

doi:10.3390/ijerph16183244

Cited by 20 publications

(15 citation statements)

References 48 publications

(61 reference statements)

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“…In our case, the influent had much lower concentrations of pollutants, which, perhaps, did not require a high filling ratio. Zhao et al [27] in their study stated that growth of filling ratio from 20 to 30% resulted in significant efficiency growth; however, in our case, the filling ratio of 30% gave no significant improvement of treatment efficiency. In the case of BB and PV carriers, the efficiency even slightly decreased for a filling ratio of 30%.…”

Section: Discussioncontrasting

confidence: 70%

Application of Biofilm Carrier in Aerobic Reactors as a Method to Improve Quality of Wastewater Treatment

Makisha

2021

Hydrology

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The research revealed in the paper considers the improvement of secondary treatment of wastewater in the aerobic reactor to provide removal of organics and nutrients. There were five types of polymer biofilm carriers taken into account initially; however, two of them were decided not to apply due to technological reasons. The main part of the research was divided into three substages to investigate each type of biofilm carrier. According to the literature review, the optimal efficiency may be reached if the carrier filling ratio is 10 to 30% of reactor volume. On this basis, there were three benches launched at each sub-stage with a corresponding filling ratio of 10, 20, and 30%. The fourth reactor at each sub-stage had no floating carrier to control the experiment. The research of all three types of carriers showed the effect of BOD removal in the range of 95–96% for benches equipped with a floating carrier, which can be considered similar to the control bench with the efficiency of 92%. In the case of ammonia nitrogen, the removal control bench showed only 55% of efficiency, while floating carriers helped to increase the efficiency up to 70–86%. Despite obtaining relatively positive results, the research has to be continued to achieve regulation requirements in treatment quality.

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Section: Discussioncontrasting

confidence: 70%

Application of Biofilm Carrier in Aerobic Reactors as a Method to Improve Quality of Wastewater Treatment

Makisha

2021

Hydrology

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“…and pH of the influent and effluent were monitored every two days. HRT and pH were controlled at 12 h and 7.5-8.1 [16], respectively, and agitation speed was adjusted to 60 rpm. A total of 45.5 mg/L methanol was added to maintain the COD/TN ratio at 6.6, while the original ratio was <4.6.…”

Section: Reactor Set-up and Operationmentioning

confidence: 99%

“…It has distinguishing advantages of high volume load, no clogging in the biological tank, strong impact resistance, low head loss, stable performance, reliable operation, high specific biomass activity, long service life, and no need of regular backwashing [14,15]. Although MBBR has been trialed for reverse osmosis concentrate treatment, it seems that they have been focused on micro-communities [13] and the biocarrier filling rate [16]. In addition, high rate N removal has been demonstrated by the MBBR, but there is still space to enhance the removal efficiency in MBBR [17].…”

Section: Introductionmentioning

confidence: 99%

“…So far, MBBR has been widely used to treat various kinds of wastewaters such as paper mill wastewater [27], coal gasification wastewater [28], pharmaceutical industry wastewater [29,30], fish farm wastewater [31], and reverse osmosis concentrate [13,16,32], while the denitrification performance of the systems was affected by the carrier material, configuration, and pore space structure as well as the surface morphology of the biofilm [33]. However, there have been no reports on the deep denitrification of reverse osmosis concentrate by denitrifying MBBR with different configurations of polyethylene carriers, which forms the basis of the current study.…”

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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“…After thorough washing, the samples were dried (KADA 85 U/SMD) for 2 min and smeared with gold. The GBs filter media without biofilm, and GB samples of 1st, and 9th-week old aerobic biofilms were observed at 1000 and 3000 × magnification, under SEM 25 , 39 , 40 .…”

Section: Methodsmentioning

confidence: 99%

Assessment of the aerobic glass beads fixed biofilm reactor (GBs-FBR) for the treatment of simulated methylene blue wastewater

Donkadokula

Kola

Saroj

2020

Sci Rep

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The present research is focused on the application of glass beads (GBs) in fixed biofilm reactor (FBR) for the treatment of simulated methylene blue (MB) wastewater for 9 weeks under aerobic conditions. The COD of MB wastewater showed a reduction of 86.48% from 2000 to 270.4 mg/L, and BOD was declined up to 97.7% from 1095.5 to 25.03 mg/L. A drastic increase in the pH was observed until the 3rd week (8.5 to 8.28), and later, marginal changes between 8.30 ± 0.02 were noticed. A dramatic fluctuation was observed in ammonia concentration which increased (74.25 mg/L) up till the 2nd week, and from the 3rd week it started declining. In the 9th week, the ammonia concentration dropped to 16.5 mg/L. The color intensity increased significantly up till the 2nd week (259,237.46 Pt/Co) of the experiment and started decreasing slowly thereafter. The SEM–EDX analysis has shown the maximum quantity of carbon content in the GBs without biofilm, and then in the GB samples of 1st, and 9th-week old aerobic biofilms. Furthermore, Raman spectroscopy results revealed that the 9th-week GBs has a fine and strong MB peak and matched with that of the MB stock solution. Overall, the results have shown that the GBs filter media were suitable for the development of active biofilm communities for the treatment of dye wastewater. Thus, GBs-FBR system can be used for wastewater treatment to solve the current problem of industrial pollution in many countries and to protect the aquatic environment from dye pollution caused by the textile industry.

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Influence of Carrier Filling Ratio on the Advanced Nitrogen Removal from Wastewater Treatment Plant Effluent by Denitrifying MBBR

Cited by 20 publications

References 48 publications

Application of Biofilm Carrier in Aerobic Reactors as a Method to Improve Quality of Wastewater Treatment

Application of Biofilm Carrier in Aerobic Reactors as a Method to Improve Quality of Wastewater Treatment

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

Assessment of the aerobic glass beads fixed biofilm reactor (GBs-FBR) for the treatment of simulated methylene blue wastewater

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