Removal of polar micropollutants from domestic wastewater using a methanogenic – aerobic moving bed biofilm reactor system

Kora, Elianta; Theodorelou, Danai; Gatidou, Georgia; Fountoulakis, M.S.; Stasinakis, Athanasios S.

doi:10.1016/j.cej.2019.122983

Cited by 35 publications

(10 citation statements)

References 41 publications

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“…The role of the OLR in the removal of the OMPs is, in fact, a topic of current and general interest in biological systems, but results still do not show a clear trend. For instance, Kora et al (2020) showed that increasing the OLR improved the removal of 3 out of 5 OMPs spiked in a methanogenic-aerobic moving bed biofilm reactor and Moya-Llamas et al (2018) found better biodegradations for 6 OMPs at higher OLRs in a UASB reactor coupled to a MBR. On the contrary, in a moving biofilm bed reactor Abtahi et al (2018) reported for some OMPs a maximum removal at the highest OLR tested and for others at the lowest OLR and Carneiro et al (2020) reported a negative impact of increasing OLRs in the biodegradation of citalopram and sulfamethoxazole in anaerobic fix bed biofilm reactors.…”

Section: Introductionmentioning

confidence: 99%

The organic loading rate affects organic micropollutants’ cometabolic biotransformation kinetics under heterotrophic conditions in activated sludge

Kennes-Veiga

González-Gil²,

Carballa

et al. 2021

Water Research

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Section: Introductionmentioning

confidence: 99%

The organic loading rate affects organic micropollutants’ cometabolic biotransformation kinetics under heterotrophic conditions in activated sludge

Kennes-Veiga

González-Gil²,

Carballa

et al. 2021

Water Research

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“…The biodegradation of toxic pollutants is usually carried out by matrix co-metabolism. Co-metabolism is defined as “the transformation of a non-growing substrate in the obligate presence of a growing substrate or another transformable compound” ( Kora et al, 2020 ). Compounds that cannot support cell replication due to their low concentration (for example, micropollutants in wastewater) are known as non-growth substrates.…”

Section: Resultsmentioning

confidence: 99%

Study on the removal characteristics and degradation pathways of highly toxic and refractory organic pollutants in real pharmaceutical factory wastewater treated by a pilot-scale integrated process

Dai

Pang²,

Ding³

et al. 2023

Front. Microbiol.

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IntroductionPharmaceutical wastewater frequently contains high levels of toxic pollutants. If they are discharged untreated, they pose a threat to the environment. The traditional activated sludge process and the advanced oxidation process do not sufficiently remove toxic and conventional pollutants from pharmaceutical wastewater treatment plants (PWWTPs).MethodsWe designed a pilot-scale reaction system to reduce toxic organic pollutants and conventional pollutants from pharmaceutical wastewater during the biochemical reaction stage. This system included a continuous stirred tank reactor (CSTR), microbial electrolysis cells (MECs), an expanded sludge bed reactor (EGSB), and a moving bed biofilm reactor (MBBR). We used this system to further investigate the benzothiazole degradation pathway.Results and discussionThe system effectively degraded the toxic pollutants (benzothiazole, pyridine, indole, and quinoline) and the conventional chemicals (COD, NH4+-N, TN). During the stable operation of the pilot-scale plant, the total removal rates of benzothiazole, indole, pyridine, and quinoline were 97.66, 94.13, 79.69, and 81.34%, respectively. The CSTR and MECs contributed the most to the removal of toxic pollutants, while the EGSB and MBBR contributed less to the removal of the four toxic pollutants. Benzothiazoles can be degraded via two pathways: the benzene ring-opening reaction and the heterocyclic ring-opening reaction. The heterocyclic ring-opening reaction was more important in degrading the benzothiazoles in this study.ConclusionThis study provides feasible design alternatives for PWWTPs to remove both toxic and conventional pollutants at the same time.

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“…There are more than 3 million synthetic organic compounds distributed in the world, such as pharmaceuticals, personal care products, industrial additives, plasticizers, and pesticides, where about 100,000 of these are regularly produced (200 million tons/year), and each year this number increases by about 5-10%. Many of these compounds remain biochemically active in aquatic systems and are quantified at low concentrations, on the order of microgram or nanogram per liter, classified as [17,23]. Conventional wastewater treatment plant (WWTP) represent one of the main routes of dissemination of these substances to the environment [10,24].…”

Section: Introductionmentioning

confidence: 99%

The performance of a Multi-Stage Hybrid Reactor to treat real wastewater: Benzophenone and Diethyl Phthalate removal

Amaral

Cunha

Marques

2022

IOP Conf. Ser.: Earth Environ. Sci.

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One of the consequences of the increasing diversity of new chemical compounds used in industrialized products is the release of these compounds as micropollutants (MPs) in the environment around the world, particularly in aqueous matrices. Benzophenone (BP) and Diethyl Phthalate (DEP), two MPs of environmental concern due to their potential toxicity are widely used and found with considerable concentrations mostly in wastewaters. Information about the efficiency of biological treatment in removing DEP from the wastewater is scarce and until recently, there was no information on the removal of BP. Due to the risks these substances pose to the human and environmental health there is a worldwide demand for the improvement of biological treatment plants with focus on the removal of these and other MPs, since conventional Wastewater Treatment Plants (WWTP) have very limited capacity to remove them and advanced treatment steps (e.g.: ozonation, photocatalysis, ultrafiltration.) increases substantially the treatment costs. A promising biological treatment approach for the removal of MPs combines fixed and suspended biomasses in the same reactor (hybrid reactors) and includes multiple compartments with different redox conditions. The objective of this study was to assess the performance of a new Multi-Stage Hybrid Reactor, focusing on the removal of Benzophenone (BP) and Diethylphthalate (DEP). The pilot system has seven units (anaerobic, anoxic 1, aerobic, anoxic 2, re-aeration and 2 sedimentation tanks) and it was installed at a large Municipal WWTP in Rio to treat real domestic wastewater. The total volume was 400 L and 50% of the aerobic tank (120 L) was filled with carriers (support media). The reactor’s efficiency was evaluated during two periods: (a) one with predominantly suspended biomass and (b) another one with predominantly fixed biomass in the aerobic tank. The highly variable composition of the affluent, affecting the organic load, caused fluctuations in the treatment performance. Even though, multi-stage hybrid bioreactor was able to remove up to 69.6% of BP and up to 74.5% of DEP, being the highest removal efficiencies achieved during the period when the aerobic tank had predominantly fixed biomass.

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Removal of polar micropollutants from domestic wastewater using a methanogenic – aerobic moving bed biofilm reactor system

Cited by 35 publications

References 41 publications

The organic loading rate affects organic micropollutants’ cometabolic biotransformation kinetics under heterotrophic conditions in activated sludge

The organic loading rate affects organic micropollutants’ cometabolic biotransformation kinetics under heterotrophic conditions in activated sludge

Study on the removal characteristics and degradation pathways of highly toxic and refractory organic pollutants in real pharmaceutical factory wastewater treated by a pilot-scale integrated process

The performance of a Multi-Stage Hybrid Reactor to treat real wastewater: Benzophenone and Diethyl Phthalate removal

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