The adsorption of organic micropollutants onto powdered activated carbon (PAC) was investigated in laboratory scale based on samples from four wastewater process streams (matrices); three a pilot-scale plant with different degrees physicochemical treatment municipal and one full-scale sludge post-precipitation. consisted chemically enhanced primary microsieving followed by direct membrane filtration as microfiltration or ultrafiltration. results showed highest the tertiary (biologically...

A novel process configuration was designed to increase biofilm growth in tertiary moving bed reactors (MBBRs) by providing additional substrate from primary treated wastewater a sidestream reactor under different redox conditions order improve micropollutant removal MBBRs with low availability. This recirculating MBBR operated on pilot scale for 13 months, and systematic seen the biomass concentration degradation rates, compared without substrate. The rates per unit carrier surface area...

Granular activated carbon (GAC) filters can be used to reduce emissions of organic micropollutants via municipal wastewater, but it is still uncertain which extent biological degradation contributes their removal in GAC filters.

The degradation potential of micropollutants and transformation products in biological post-treatment after ozonation is partly unknown. A pilot plant with subsequent treatment a moving bed biofilm reactor (MBBR) was thus operated over 16 months to investigate the removal formation N-oxide products. Lab-scale kinetic experiments were performed parallel. At moderate ozone dose 0.5 g O3 g−1 DOC, further gabapentin 3 iodinated contrast media (iomeprol, iopamidol, iohexol) could be induced by at...

The objective of this study was to evaluate the influence operational conditions and wastewater properties on removal pharmaceuticals, contrast media antibiotics through ozonation, in order facilitate optimization treatment its implementation a full scale. Pilot-scale ozone oxidation trials were performed treated wastewater, before after post-precipitation, over seven-month period, including summer winter months. Hydraulic retention times as short 7 min found be sufficient for organic...

Ozonation transformation products (OTPs) are largely unknown compounds that formed during the ozonation of micropollutants, and it is uncertain to which extent these can be removed by subsequent adsorption activated carbon. Thus, 14C-labeled micropollutants were ozonated generate OTPs, for sum all OTPs carbon could determined, based on labeled Further, 14CO2 traps used examine mineralization moieties ozonation. 14CO2-formation revealed a partial in except propyl-labeled bisphenol A...

A full-scale membrane bioreactor (MBR) with ultrafiltration, followed by granular activated carbon (GAC), was examined to determine the potential of reusing treated water as a source drinking or for irrigation. The major part bacteria removal took place in MBR, whereas GAC removed substantial amounts organic micropollutants. Annual variations inflow and infiltration resulted concentrated influent during summer diluted winter. E. coli high throughout process (average log 5.8), effluent...

The capacity for organic micropollutant removal in granular activated carbon (GAC) filters wastewater treatment changes over time. These are general attributed to adsorption, but may some cases also be affected by biological degradation. Knowledge on the degradation of micropollutants, however, is scarce. In this work, micropollutants several full-scale GAC and sand was investigated through incubation experiments a period three years, using

The removal of organic micropollutants in granular activated carbon (GAC) filters can be attributed to adsorption and biological degradation. These two processes interact with each other or proceed independently. To illustrate the differences their interaction, three 14C-labeled varying potentials for biodegradation were selected study columns adsorbing non-adsorbing (sand) filter media. Using 14CO2 formation as a marker biodegradation, we demonstrated that poorly N-nitrosodimethylamine...

Primary and chemically enhanced primary wastewater treatment with microsieving (disc or drum filtration) was studied at the large pilot scale seven municipal plants in Europe. Without chemical dosing, reduction of suspended solids (SS) (on average) 50% (20-65%). By introducing dosing cationic polymer only, SS removal could be controlled increased to >80%. A maximum >90% achieved a >0.007 mg polymer/mg influent 20 Al(3+)/L 30 Fe(3+)/L. When comparing sieve pore sizes 30-40 μm 100 μm, effluent...

Separation of Biomass From Moving Bed Biofilm Reactors (MBBRs)The Reactor (MBBR™) process was developed in Norway 20 years ago. It is used a biofilm where the biomass attached to small plastic elements that move freely along with water reactors. The movement caused by aeration aerobic reactors, and mechanical mixers anoxic moving bed pure systems (without sludge...Author(s)Hallvard ødegaardMichael CimbritzMagnus ChristenssonClaus Poulsen DahlSourceProceedings Water Environment...

Ozonation is an established technique used to reduce the discharge of organic micropollutants into aquatic environment, but possibility predicting ozone demand for different wastewater matrices still limited, especially in presence suspended solids (SS). A new tool prediction removal with ozone, based on dissolved and particulate matter activated sludge effluents, was therefore developed. The 25 determined laboratory scale absence solids. linear trajectories dose–response curves enabled...

Ozonation of wastewater can reduce the release organic micropollutants, but may result in formation undesirable by-products, such as bromate from bromide. Bromide is one most abundant ions seawater, primary precursor during ozonation, and end product microbial reduction. Investigations were carried out to compare concentration bromide coastal non-coastal catchment areas, monitor assess potential for subsequent reduction with denitrifying carriers. Higher concentrations systematically...

Primary treatment of municipal wastewater by rotating belt filtration followed hydrolysis and acidogenic fermentation the filter primary sludge (FPS) at ambient temperature was studied pilot-scale during one year. The seasonal variations volatile fatty acids (VFAs), nutrient release soluble COD production as well microbial community assembly were assessed, leading to novel findings for temperature. reproducibility VFA performance first established operating two reactors under same...

Primary filtration is a compact pre-treatment process for municipal wastewater, which can lead to high removal of total suspended solids (TSS) if polymer added prior filtration. Extensive carbon with rotating belt filter (RBF) be combined primary sludge fermentation at ambient temperature, in order produce volatile fatty acids (VFAs) as source biological nutrient (BNR). This was implemented large pilot-scale and operated more than year. The results showed that the RBF efficiently removed...

Microscreening (using Discfilters) is a widely used technology for suspended solids removal in tertiary effluent streams of wastewater treatment plants. Several pilot studies have shown the feasibility using coagulation and flocculation combination with microscreens advanced phosphorus removal, but number full-scale references still limited. In summer 2014, first Scandinavian Discfilter installation 2-stage chemical pre-treatment (coagulation flocculation) was started up at Arvidstorp plant...

This paper summarizes the results and experiences from full-scale discfilter plant at Rya WWTP. In 2010 WWTP was extended with post-denitrification a for tertiary filtration of effluent in order to meet new discharge limits 10 mg total nitrogen 0.3 mg/l phosphorus. The disc filters receive both moving bed biofilm reactor (MBBR) secondary settlers. are equipped filter cloths 15 µm pore openings. concentration suspended solids generally kept below 5 phosphorus <0.2 approximately 60%...

Chemically enhanced primary treatment (CEPT) followed by microsieving and direct membrane filtration (DMF) as ultrafiltration, was evaluated on pilot scale at a municipal wastewater plant. In addition, granular activated carbon (GAC) filter downstream of DMF for the removal organic micropollutants. Up to 80% total (TOC) 96% phosphorus were removed CEPT with microsieving. The additional contribution subsequent minor, only five days GAC possible due fouling membrane. Of 21 micropollutants...