Moving bed biofilm reactor (MBBR) for dairy wastewater treatment

Santos, Andreia D.; Martins, Rui C.; Quinta‐Ferreira, Rosa M.; Castro, Luís M.

doi:10.1016/j.egyr.2020.11.158

Cited by 50 publications

(20 citation statements)

References 8 publications

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“…The results showed that the COD removal was independent of the oxygen uptake obtained in the tests. Moreover, the results found for alternative carriers without protected areas are similar to those reported in the literature for a carrier with a protected area (Azizi et al 2013;Wei et al 2016;Santos et al 2020).…”

Section: Respirometric Analysis Of the Biofilmsupporting

confidence: 88%

Application of alternative carriers without protected surface in moving bed biofilm reactor for domestic wastewater treatment

Freitas

Leite

Hoffmann

et al. 2022

Water Practice and Technology

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Biological reactors with immobilized biomass on free carriers have provided new perspectives for wastewater treatment, once they reduce the system size and increase the treatment capacity. In this study, the performance of three Moving Bed Biofilm Reactors (MBBR) using different carriers (with and without protected surface area) were evaluated for domestic wastewater treatment in continuous flow. Each MBBRs (i.e., R1, R2, and R3) was filled at a ratio of 50% with high-density polyethylene carriers with different characteristics: both R1-K1 and R2-Corrugated tube with protected surface and R3-HDPE flakes without protected surface. Chemical oxygen demand (COD) removal of 80 ± 5.0, 80 ± 3.5, and 78 ± 2.4% was achieved by R1, R2, and R3, respectively. The oxygen uptake by biofilm attached on the carriers was 0.0079 ± 0.0013, 0.0033 ± 0.0015, and 0.0031 ± 0.0026 μg DO·mm−2 for the K1, corrugated tube, and HDPE flakes, respectively. No significant differences were observed between the performance of the three MBBRs in terms of physico-chemical parameters (alkalinity, pH, and dissolved inorganic carbon) and COD removal. Results showed that the carrier type and its characteristics (total area and with/without protected area) did not affect the organic matter removal. Thus, the carrier without a protected surface in MBBR could be a promising low-cost option for domestic wastewater treatment.

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Section: Respirometric Analysis Of the Biofilmsupporting

confidence: 88%

Application of alternative carriers without protected surface in moving bed biofilm reactor for domestic wastewater treatment

Freitas

Leite

Hoffmann

et al. 2022

Water Practice and Technology

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“…Numerous studies have paved the way to the improvement of nitrification and denitrification efficiency in the operating conditions of existing treatment facilities. [4]. In addition, it was important to establish and evaluate the impact of various factors on the implementation of nitrification and denitrification, including the concentration of the substrate, temperature, dissolved oxygen concentration (DO), pH, concentration, and nature of toxic substances.…”

Section: Introductionmentioning

confidence: 99%

“…Scientists have proposed various methods of treatment using immobilized microflora [4,8,19]. Scientists have also developed various versions of floating-load filters [20] both for the needs of water treatment and for various stages of wastewater treatment [21].…”

Section: Introductionmentioning

confidence: 99%

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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“…Santos et al [19] used dairy wastewater with COD concentrations of 600-800 mg O2 L −1 and 1100-1200 mg O2 /L −1 , in batch and continuous operation, to remove COD using an MBBR. For a carrier filling fraction of 40%, the authors achieved higher COD reductions than for 20% [27]. These results suggest that the biofilm formed in the carriers effectively improves COD removal.…”

Section: Organic Matter Total Carbon and Total Nitrogen Removalmentioning

confidence: 79%

“…The main characteristic of these systems is the biofilm growing on a protected area with different species of microorganisms coexisting in the carriers' surface, enhancing protection and resilience to environmental conditions [19]. The treatment system does not require any sludge recycling, and only the surplus biomass should be separated, which constitutes a considerable advantage over the AS and SBR systems [21,27]. However, due to aeration and oxygen requirements of the carrier mixing, ensuring that formation of stagnant zones within the reactors does not occur is the main setback of this system.…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Biosolids Production and System Efficiency between Activated Sludge, Moving Bed Biofilm Reactor, and Sequencing Batch Moving Bed Biofilm Reactor in the Dairy Wastewater Treatment

et al. 2022

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Dairy industry wastewater is rich in organic content, presenting a high biodegradability, and therefore biological treatments are widely employed. This study aimed to evaluate biosolids production in three systems: activated sludge (AS), movingbed biofilm reactor (MBBR), and sequencingbatch movingbed biofilm reactor (SBMBBR). Simulated dairy wastewater was used at different organic load rates (OLRs): 1.22, 2.87, and 5.44 gCOD L−1d−1. Besides biosolids production, COD, total carbon (TC), and total nitrogen (TN) removal efficiency was evaluated. Biosolids production was measured in the mixed liquor, carrier-adhered biomass, treated wastewater, and surplus sludge. The operational conditions were kept similar for the three systems, with a carrier filling ratio of 50% for MBBR and SBMBBR. The SBMBBR proved to have better performance in the removal efficiencies of COD, TC, and TN for all OLRs studied. The MBBR presented a similar COD and TC removal efficiency as the SBBR for the two highest OLRs (2.87 and 5.44 gCOD L−1d−1). Concerning biosolids production, the MBBR system produced less biomass and delivered the lowest amount of adhered biomass inside the carriers. The AS treatment generated the highest amount of sludge and offered the worst treatment capability for all OLRs evaluated.

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Moving bed biofilm reactor (MBBR) for dairy wastewater treatment

Cited by 50 publications

References 8 publications

Application of alternative carriers without protected surface in moving bed biofilm reactor for domestic wastewater treatment

Application of alternative carriers without protected surface in moving bed biofilm reactor for domestic wastewater treatment

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

A Comparison of Biosolids Production and System Efficiency between Activated Sludge, Moving Bed Biofilm Reactor, and Sequencing Batch Moving Bed Biofilm Reactor in the Dairy Wastewater Treatment

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