Removal of micropollutants during biological phosphorus removal: Impact of redox conditions in MBBR

Torresi, Elena; Tang, Kai; Deng, Jie; Sund, Christina; Smets, Barth F.; Christensson, Magnus; Andersen, Henrik Rasmus

doi:10.1016/j.scitotenv.2019.01.283

Cited by 56 publications

(20 citation statements)

References 40 publications

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“…So, in particular, a system of wastewater treatment using biofilm is proposed. The advantages of treatment systems using immobilized microflora and methods of implementing the method using rotary conducting reactor, in which the biofilm is formed on the surfaces of disks of rotary devices, on the surface of sand particles in systems with a fluidized bed, etc., are considered [23]. German scientists have also patented a biorotor-type device for wastewater treatment using attached microflora.…”

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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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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“…Currently, parameters such as redox conditions or biodegradable dissolved organic carbon, are used to evaluate the removal efficiencies of TOrCs (Bertelkamp et al 2016;Torresi et al 2019;Oberleitner et al 2020), but new indicators directly associated to degradation processes (e.g., microorganisms, functional enzymes, transformation products) can be expected to be additional suitable tools for the prediction of the biotransformation potential and controlling removal performance. Here, we investigated the biotransformation of diverging TOrCs by eight biological active sand filter materials from wastewater and drinking water treatment plants, for which the metagenomic analysis of the microbial communities provided novel insights into the biological potential of TOrC transformations.…”

Section: Discussionmentioning

confidence: 99%

Microbial biomass, composition, and functions are responsible for the differential removal of trace organic chemicals in biofiltration systems

Cao

Wolff

Liguori

et al. 2021

Preprint

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Biofiltration processes help to remove trace organic chemicals (TOrCs) both in wastewater and drinking water treatment systems. However, the detailed TOrCs biotransformation mechanisms as well as the underlying drivers behind the variability of site specific transformation processes remain elusive. In this study, we used laboratory batch incubations to investigate the biotransformation of 51 TOrCs in eight bioactive filter materials of different origins treating a range of waters, from wastewater effluents to drinking water. Microscopy, 16S rRNA amplicon and whole metagenome sequencing for assessing associations between the biotransformation rate constants, microbial composition and genetic potential complemented chemical analysis. We observed strong differences in the mean global removal of TOrCs between the individual sand filters (-1.4% to 58%), which were mirrored in overall biomass, microbial community composition, and enzyme encoding genes. From the six investigated biomass markers, ATP turned out to be a major predictor of the mean global biotransformation rate, while compound specific biotransformations were correlated with the microbial community composition. High biomass ecosystems were indicated in our systems by a dominance of Nitrospirae, but individual TOrC biotransformation was statistically connected to rare taxa (< 2%) such as Hydrogenophaga, or indiviudal enzymes such as the enoyl-CoA hydratase/3-hydroxyacyl-CoA dehydrogenase gene. In general, this study provides new insights into so far rarely addressed variability of TOrCs biotransformation. We propose novel biological indicators for the removal performance of TOrCs in biofiltration systems, highlighting the role of ATP in predicting and normalizing the global transformation, and the role of the microbial community for the individual transformation of TOrCs in engineered and natural systems.

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“…Thus, the development of advanced technology to improve phosphorus removal efficiency is needed, including easy installation, short intention time, little space, low operation cost, and low capital investment [2,[7][8][9][10]. Enhanced biological phosphorus removal processes have attracted much more attention [11][12][13][14][15]. The key Molecules 2021, 26, 3342 2 of 10 factor in the enhanced biological phosphorus removal process is the use of phosphorus accumulating organisms.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics Analysis and Removal of P in a P-(M)-H2O System

et al. 2021

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In order to efficiently remove phosphorus, thermodynamic equilibrium diagrams of the P-H2O system and P-M-H2O system (M stands for Fe, Al, Ca, Mg) were analyzed by software from Visual MINTEQ to identify the existence of phosphorus ions and metal ions as pH ranged from 1 to 14. The results showed that the phosphorus ions existed in the form of H3PO4, H2PO4−, HPO42−, and PO43−. Among them, H2PO4− and HPO42− were the main species in the acidic medium (99% at pH = 5) and alkaline medium (97.9% at pH = 10). In the P-Fe-H2O system ((P) = 0.01 mol/L, (Fe3+) = 0.01 mol/L), H2PO4− was transformed to FeHPO4+ at pH = 0–7 due to the existence of Fe3+ and then transformed to HPO42− at pH > 6 as the Fe3+ was mostly precipitated. In the P-Ca-H2O system ((P) = 0.01 mol/L, (Ca2+) = 0.015 mol/L), the main species in the acidic medium was CaH2PO4+ and HPO42−, and then transformed to CaPO4− at pH > 7. In the P-Mg-H2O system ((P) = 0.01 mol/L, (Mg2+) = 0.015 mol/L), the main species in the acidic medium was H2PO4− and then transformed to MgHPO4 at pH = 5–10, and finally transformed to MgPO4− as pH increased. The verification experiments (precipitation experiments) with single metal ions confirmed that the theoretical analysis could be used to guide the actual experiments.

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Removal of micropollutants during biological phosphorus removal: Impact of redox conditions in MBBR

Cited by 56 publications

References 40 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

Microbial biomass, composition, and functions are responsible for the differential removal of trace organic chemicals in biofiltration systems

Thermodynamics Analysis and Removal of P in a P-(M)-H2O System

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