Henrik Rasmus Andersen

Technical University of Denmark | DTU · Department of Environmental Engineering

In this study the fate of pharmaceuticals and personal care products which are irrigated on arable land with treated municipal wastewater was investigated. In Braunschweig, Germany, wastewater has been irrigated continuously for more than 45 years. In the winter time only the effluent of the sewage treatment plant (STP) of Braunschweig is used for...

http://www.sciencedirect.com/science/article/pii/S1385894715017234. Ozonation experiments were performed using unchlorinated tap water used for filling municipal swimming pools, actual pool water and pool water polluted by addition of fresh tap water and artificial body fluid to evaluate ozone kinetics and water quality effects on formation of vola...

Ozonation aimed at removing pharmaceuticals was studied in an effluent from an experimental pilot system using staged Moving Bed Biofilm Reactor (MBBR) tanks for the optimal biological treatment of wastewater from a medical care unit of Aarhus University Hospital. Dissolved Organic Carbon (DOC) and pH in samples varied considerably, and the effect...

We investigated the possibility of applying performic acid (PFA) and peracetic acid (PAA) for disinfection of combined sewer overflow (CSO) in existing CSO management infrastructures. The disinfection power of PFA and PAA towards Escherichia coli (E. coli) and Enterococcus were studied in batch-scale and pre-field experiments. In the batch-scale ex...

[This corrects the article DOI: 10.3389/fmicb.2023.1203805.].

Magnetotactic bacteria (MTB) are microorganisms widely inhabiting the oxic-anoxic interface of aquatic environments. Beside biomineralizing magnetic nanocrystals, MTBs are able to sequester various chemical elements (e.g., carbon and phosphorus) for the biogenesis of intracellular granules, like polyhydroxyalkanoate (PHA) and polyphosphate (polyP),...

Pharmaceuticals and other organic micropollutants (OMPs) present in wastewater effluents are of growing concern, as they threaten environmental and human health. Conventional biological treatments lead to limited removal of OMPs. Methanotrophic bacteria can degrade a variety of OMPs. By employing a novel bubble-free hybrid membrane biofilm bioreact...

The conversion of waste plastic into high‐value‐added chemicals is regarded as a promising approach for relieving global plastic pollution and contributing to the circular economy. Herein, a partial calcination strategy is developed to fabricate a zinc oxide/UiO66‐NH2 (ZnO/UiO66‐NH2) heterojunction, in which ZnO is encapsulated in porous UiO66‐NH2...

The activation of peroxymonosulfate (PMS) to generate radical oxygen species (ROS) for in situ chemical oxidation has been shown to be an efficient technology for polishing micropollutants in wastewater effluent. Thus, it is also of great importance to develop environmental-friendly catalysts for PMS activation. The present study employed suspended...

Conventional Fenton treatment is fundamentally impractical for large-scale applications, as the consumption of Fe(II), H 2 O 2 , and pH regulators and the accumulation of iron hydroxide sludge are very costly. This paper describes a new method for Fenton treatment of complex wastewater without additional dosing of Fe(II) and H 2 O 2 , without iron-...

Aesthetic aspects of drinking water, such as Taste and Odor (T&O), have significant effects on consumer perceptions and acceptability. Solving unpleasant water T&O episodes in water supplies is challenging, since it requires expertise and know-how in diagnosis, evaluation of impacts and implementation of control measures. We present gaps, challenge...

Freshly formed manganese oxides (MnOx) can oxidise various organic pollutants, but its reactivity is short-lived and therefore continuous pollutant removal by MnOx is not feasible. In this study, an engineered cycle of manganese reduction followed by oxidation was implemented in a two-stage moving bed biofilm reactor (staged MBBR), aiming to replen...

The occurrence of antibiotic resistance in wastewater initiated the interest in investigating the inactivation of antibiotic-resistant bacteria by various disinfecting agents. In this study, the removal of multi-resistant and ciprofloxacin-resistant bacteria from municipal and hospital untreated wastewater, using peracetic acid (PAA) was studied. P...

The release of microplastics (MPs) into the environment has engendered considerable ecosystem and human health concerns. Herein, we propose light-driven photocatalytic upcycling of MPs using heterojunction photocatalysts. A novel synthesis method was developed through in-situ conversion of unstable metal sites on bimetallic metal-organic frameworks...

https://www2.mst.dk/Udgiv/publications/2022/09/978-87-7038-442-1.pdf The purpose of the project was to develop a treatment technology to reduce the amount of antibiotic resistant bacteria (ARB) from raw hospital wastewater using the unbranched wastewater pipe from super hospitals to the wastewater treatment plants using peracetic acid (PAA). The...

Fe(II) regeneration from ferric sludge via a biocathode and citrate system has recently been proposed to avoid iron-sludge accumulation and iron consumption in homogeneous Fenton treatments. However, poor regeneration rate of Fe(II) from ferric sludge at a near-neutral pH, without an iron-complexing agent, limited its wider practical application. H...

In this contribution, we analyse scenarios of advanced wastewater treatment for the removal of micropollutants. By this we refer to current mainstream, broad spectrum processes including ozonation and sorption onto activated carbon. We argue that advanced treatment requires properly implemented tertiary (nutrient removal) treatment in order to be e...

Pharmaceuticals present in wastewater effluents threaten the water environment. Conventional technologies show limited removal of organic micropollutants. Methanotrophic bacteria can degrade many organic micropollutants, while allowing nutrient recovery. We grew a methanotrophic enrichment at three CH4 loading rates in a membrane aerated bioreactor...

In this study, sorption distribution coefficients were determined for 71 pharmaceuticals, aiming in describing their sorption behavior to powder activated carbon (PAC). The data are expected to be applied when designing and up-grading wastewater treatment plants (WWTP) for improved removal of pharmaceuticals by applying sorption to PAC as an additi...

Produced water (PW) generated worldwide has lately become an issue of environmental concern. PW has a complex composition and a suitable treatment at offshore oil and gas platforms is required to achieve zero harmful discharge into the sea. The feasibility of electrochemical oxidation, heat-activated persulfate and ozonation was investigated as PW...

The discharge of produced water from offshore oil platforms is an emerging concern due to its potential adverse effects on marine ecosystems. In this study, we investigated the feasibility and capability of using marine sediments for the bioremediation of produced water. We utilized a combination of porewater and solid phase analysis in a series of...

The aim of the MerEFF project was to develop an environmentally sustainable technology based on a strict biological approach in a semi-technical scale at Herning Water. The technology concept developed and tested at a large pilot scale, is based on the moving bed biofilm reactor principle, where it is possible to select slow-growing bacteria capabl...

In this contribution, we analyse scenarios of advanced wastewater treatment for the removal of micropollutants. We refer to current mainstream, broad spectrum processes including ozonation and sorption onto activated carbon. We review the critical aspects of the main advanced treatment options, their advantages and disadvantages. We propose a quant...

Bio-electro-Fenton (BEF) processes have been widely studied in recent years to remove recalcitrant micropollutants from wastewater. Though promising, it still faces the critical challenge of residual iron and iron sludge in the treated effluent. Thus, an innovative medium-pressure ultraviolet-catalyzed bio-electrochemical system (MUBEC), in which m...

Wastewater from pharmaceutical and related industries contains many residual pharmaceutical components rich in color and high COD contents, which cannot be removed through the traditional wastewater treatment processes. Recently, microbial electrolysis ultraviolet cell (MEUC) process has shown its promising potential to remove recalcitrant organics...

Nitrification inhibition is a standard test for industry wastewater received by wastewater treatment plants (WWTPs). Standard tests such as ISO9509 cannot differentiate the effect of toxicity from relevant chemicals and the temporary inhibition of bioactivity that is induced by a change in osmotic pressure, which occurs if a sample has a high salt...

This work evaluated the removal of hospital-derived antibiotic-resistant bacteria (ARB) from source, using peracetic acid (PAA). Four pilot experiments, two using raw hospital wastewater and two using municipal wastewater, were conducted using three PAA concentrations at different contact times. These contact times were selected in order to mimic t...

Chlorine is a widely used disinfectant and oxidant used for an array of municipal and industrial applications including potable water, swimming pools, and cleaning of membranes. To most popular method to verify the concentration of free chlorine is the colorimetric method based on DPD (N, N-diethyl-p-phenylenediamine) which is fast and reasonably c...

Microbial electrosynthesis of hydrogen peroxide is receiving growing interest for a green substitute for anthraquinone process. However, poor oxygen transmission of electrode remains an obstacle to enhance H2O2 production rate without aeration. Here, a superhydrophobic natural air diffusion floating electrode (NADFE), which naturally and efficientl...

Chlorinated ethenes are among the most frequently occurring groundwater contaminants. Pump and granular activated carbon (GAC) treatment is frequently applied to limit the spreading from point contaminations. Perchloroethene (PCE) and trichloroethene (TCE) sorb well to GAC, but dichloroethene (DCE) and vinyl chloride (VC) sorb poorly, thereby defin...

Conventional wastewater treatment plants (WWTPs) cannot remove organic micropollutants efficiently, and thus various polishing processes are increasingly being studied. One such potential process is utilising biogenic manganese oxides (BioMnOx). The present study operated two moving bed biofilm reactors (MBBRs) with synthetic sewage as feed, one re...

Produced water (PW) generated worldwide are steadily increasing, and has lately become a significant issue of environmental concern. PW has a complex composition and suitable treatment at offshore platforms is required to achieve zero harmful discharge into the sea. In PW treatment, no single technology can meet regulation values, and combined phys...

Produced water (PW) is the largest waste stream generated in oil and gas industries. It has a complex composition, containing various toxic compounds that should be removed before discharge into the sea. A general biological treatment of PW would be a substantial improvement compared to current technologies, in terms of stability, extents and rates...

Bio-electro-Fenton is emerging as an alternative technology for the efficient and cost-effective removal of refractory micropollutants. Though promising, there are still several challenges that limit its wide application, including acidic operating conditions (pH at 2-3), the addition of supporting electrolytes (e.g., Na 2 SO 4), and the issue of i...

Perfluorerede forbindelser, også kaldet PFAS, er sundhedsskadelige og meget persistente stoffer, som i stigende grad detekteres i vandmiljøet. PFAS-forbindelser indgår blandt andet i forskellige typer af impregneringsmidler og fra brandslukningsskum. Gængse oxidations-teknologier kommer imidlertid til kort, når stofferne skal nedbrydes, og det prob...

Moving bed biofilm reactors (MBBRs) were placed at two wastewater treatment plants, where they were constantly fed with effluent and intermittently fed with primary wastewater. Each reactor was subjected to different feast/famine periods and flow rates of primary wastewater, thus the different organic and nutrient loads (chemical oxygen demand(COD)...

Advanced oxidation processes (AOPs) have been intensely studied for the removal of refractory pollutants because of the strong oxidizing capacity of hydroxyl radical. One of the emerging AOP methods gaining increased attention is bio-electro-Fenton (BEF) which can generate hydroxyl radical in-situ in the cathode chamber using the energy harvested b...

This article studies the ecotoxicity of 3,3′,4′,5-tetrachlorosalicylanilide (TCSA) using different bioassays and examines its fate in activated sludge batch experiments. Despite of the common use of TCSA as chemical uncoupler in wastewater treatment systems and as preservative and bacteriostat in several products, limited data has been published, s...

Målet i projektet Desinfektion af REsistente BAkterier fra HospitalsSpildevand (REBAHS) er at udvikle og afprøve en desinfektionsteknologi i pilotskala mod resistente bakterier. Det skal ske ved dosering af miljøvenligt desinfektionsmiddel. Journal: Spildevandsteknisk Tidsskrift Volume: 2020 Issue number: 5 ISSN (Print): 0108-0466 Original languag...

Drikkevandet i Danmark er truet af forurening med bland andet pesticider og det bliver i stigende omfang nødvendigt at etablere ekstra rensning på vandværket eller afværgeboringer for at beskytte grundvandet. Ofte benyttes granulær aktivt kul (GAC) filtrering, men nogle stoffer som DMS sorberes dårligt af aktivt kul. Et alternativ eller supplement...

A hybrid wastewater treatment process with combined attached biofilm (moving bed biofilm reactor) and activated sludge (named HybasTM), was implemented for the treatment of municipal wastewater. The system consisted of six staged reactors in series including pre-denitrification and nitrification in the Hybas™ line and post-denitrification in a pure...

A novel sol-gel method was employed in this study to efficiently synthesize SnO2 nanoparticles to catalyze the ozonation of acetaminophen (ACT) from aqueous solutions. The influence of various parameters including Sn source, type of capping and alkaline agents, and calcination temperature on the catalytic activity of the SnO2 preparations was inves...

Fenton reactions are widely applied when degrading recalcitrant pollutants, but reusing the resulting ferric sludge remains a challenge. A novel concept for regenerating Fe(II) solution at pH 6 based on ferric sludge from neutral Fenton was herein proposed. The microbial fuel cell (MFC) with biocathode and citric acid was used for the first time to...

Discharge of recalcitrant pharmaceuticals into aquatic environments can lead to serious negative environmental effects. While traditional wastewater treatment plants (WWTPs) are efficient for a wide range of non-toxic pollutants (i.e. ammonia), some wastewater streams contain recalcitrant toxic trace micropollutants such as pharmaceuticals that can...

In recent years, peracetic acid (PAA) has gained a lot of attention as an alternative disinfectant to chlorine-based disinfectants in the water industry. Commercial PAA solutions contain both PAA and hydrogen peroxide (HP), and the degradation of HP is slower than PAA when it is used for disinfection. All previous toxicity studies have been based o...

Peracetic acid (PAA) water solutions is applied for disinfection of industry systems, food products and non-potable water. Commercially available peracetic acid is always supplied mixed with hydrogen peroxide (H2O2). H2O2 degrade slower than the peracetic acid which creates a need to quantify both peroxides separately to gauge the disinfection powe...

Ozonation followed with a polishing moving bed biofilm reactor (MBBR) was implemented in pilot and laboratory to removal the residual pharmaceuticals and toxicity in wastewater effluent, which was from a pilot hybrid system of MBBR and activated sludge receiving municipal wastewater. The delivered ozone dosages achieving 90% pharmaceutical removal...

The bio-electro-Fenton (BEF) technology has proven to be an effective and energy-saving method for treating wastewaters containing a single pharmaceutical in the lab-scale. However, the continuous degradation of pharmaceuticals in a scaled-up BEF has never been reported. In this study, a 20-L dual-chamber BEF reactor was designed and tested for tre...

A number of different nanoscale zero-valent iron (nZVI) materials have been prepared and compared depending on the desired properties for the particular application, but different physicochemical properties of this prepared nZVI make it difficult to universally compare and standardize them to the same scale. In this study, we aimed to demonstrate a...

(English below) Las estaciones depuradoras de aguas residuales (EDAR) convencionales basadas en sistemas de lodos activados (CAS) no pueden eliminar muchos de los microcontaminantes orgánicos, incluida la mayoría de productos farmacéuticos. Los reactores biológicos de lecho móvil (MBBR) han demostrado una mayor eficiencia en la eliminación de vario...

This study investigated the feasibility of UV-absorbance and fluorescence as monitoring tools for ozone dosages applied to effluents from wastewater treatment plans (WWTPs). Secondary treated effluents from five Swedish WWTPs underwent ozonation (at dosages ranging 0.5–12.0 mg O3/L) in bench-scale experiments. Correlations between ozone dosages and...

Hospitalsspildevand er en punktkilde for antibiotikaresistente bakterier og den vigtigste punktkilde for multiresistente, patogene bakterier. Disse bakterier er saerdeles uønskede i miljøet og udgør samtidig en arbejdsmiljø-risiko på renseanlaeg og for kloakarbejdere. Det er derfor ganske vaesentligt at nde en løsning på håndteringen af spildevande...

Further biological polishing of micropollutants in WWTP effluents is limited by the lack of available carbon for cometabolic degradation. Metabolism of polyhydroxyalkanoates (PHAs) stored intracellularly during enhanced biological phosphorus removal (EBPR) could serve as carbon source for post-denitrification and micropollutant cometabolism. The re...

The ecotoxicological evaluation of combined sewer overflow (CSO) disinfectants, with their degradation products, is important for ensuring safe use. For this form of toxicity, data for organisms representing different trophic levels are needed. We studied the toxicity of the alternative disinfectants peracetic acid (PAA), performic acid (PFA) and c...

In the present study, a pilot-scale ozonation system was introduced as post treatment to reduce the pharmaceuticals and toxicity in the effluent of a pilot-scale Moving Bed Biofilm Reactor (MBBR) treating hospital wastewater. The ozonated effluent was polished further by suspended biofilm carriers to remove biodegradable organic matter and toxicity...

https://doi.org/10.1080/09593330.2019.1581261. 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)) subst...