wastewater contaminant Articles
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Treatment of wastewaters contaminated with zinc ions using natural zeolite as adsorbent in a fixed bed column
The potential of natural zeolite as a low-cost adsorbent was investigated for the removal of zinc from aqueous solution using a continuous fixed bed column. The zeolite tested was taken from the same source (Jabal Uniza in south Jordan) and subjected to crushing and sieving only, without any treatment. The two samples tested are UNZ1 (0.42–0.841 mm) and UNZ2 (0.21–0.42 mm). The Thomas model ...
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Is your Wastewater Spreading Viruses?
Concerned about your wastewater spreading contaminants into its surroundings? Our no-splash best-in-class subsurface TORNADO® Aerators prevent aerosolizing and limit the spread of pollutants. Read this informative article to learn more about how wastewater can contribute to the spread of contamination: Coronavirus and The Water Cycle—Here is What Treatment Professionals Need to Know ...
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Photocatalytic removal of cyanide with illuminated TiO2
Effects of TiO2 dosage, pH and initial cyanide concentration on the removal efficiency of cyanide from aqueous solutions with illuminated TiO2 have been investigated. Adsorption and oxidation were recognized as significant processes for the elimination of cyanide. From the Langmuir isotherm, the maximum adsorption capacity was determined as 17.24 mg/g at pH 7. Adsorbed amount of cyanide slightly ...
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Newbury Treatment Plant 50,000 Gallons Per Day
Blodgett Landing Treatment Plant Cluster System for Passive Community Treatment with Denitrification The Blodgett Landing Treatment Plant is a 50,000 GPD facility that provides passive advanced treatment and dispersal with denitrification. The town of Newbury chose the passive Enviro-Septic® System to meet strict treatment levels with a small budget. They had to design this system for ...
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Clays for heterogeneous photocatalytic decolorization of wastewaters contaminated with synthetic dyes: a review
Photocatalysis is one of the most environment-friendly and technologically viable advanced oxidation processes. Compared to conventional thermal, biological, and physicochemical treatments, photocatalytic processes have more moderate reaction conditions and higher efficiency. They are a promising technology for the treatment of dye wastewaters, particularly those that have toxic and high ...
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Biological treatment of toluene contaminated wastewater by
Alcaligenese faecalis in an extractive membrane bioreactor; experiments and modelingConventional wastewater treatment methods are not efficient in treating wastewaters contaminated with volatile hydrocarbons such as benzene, toluene and xylenes (BTX). The aim of this study is to enhance the efficiency of an extractive membrane bioreactor (EMBR) in treating toluene contaminated wastewater by usage of pure culture of Alcaligenese faecalis. Toluene was used as a model of toxic ...
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EC at Ritchie Bros. Heavy Equipment Auctioneers case study
Customer Profile Ritchie Bros. are located in Olympia, WA, and clean wash water from pressure washing mud and oil & grease from heavy earth moving equipment Application Cleaning wash water from pressure washing mud and oil & grease from heavy earth n moving equipment How Electrocoagulation Works As wastewater contaminants (i.e. suspended solids, emulsified oil & grease and heavy ...
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Procter & Gamble - Modular wastewater technology provides flexibility - Case Study
Procter & Gamble built a new shampoo factory in Urlati, Romania, at an approximate cost of 50 million euro. The new wastewater treatment plant cleans the wastewater that is contaminated with organic substances and zinc, so that it can be discharged into the municipal wastewater system. The multi-step process was developed on the basis of laboratory tests and consists of Envochem® ...
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Performance assessment of pilot horizontal sub-surface flow constructed wetlands for removal of diesel from wastewater by
Scirpus grossus One of the appropriate development technology options for the treatment of wastewater contaminated with diesel is constructed wetlands (CWs). Throughout 72 days of exposure, sampling was carried out for monitoring of physical parameters, plant growth and the efficiency of total petroleum hydrocarbon (TPH) removal, as an indication for diesel contamination, to assess the pilot-scale performance. ...
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Vertical-flow constructed wetlands treating domestic wastewater contaminated by hydrocarbons
The aim was to compare the impact of different design (aggregate size) and operational (contact time, empty time and chemical oxygen demand (COD) loading) variables on the long-term and seasonal performance of vertical-flow constructed wetland filters operated in tidal flow mode before and after a one-off spill of diesel. Ten different vertical-flow wetland systems were planted with Phragmites ...
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Development of adsorbent for the simultaneous removal of organic and inorganic contaminants from aqueous solution
In this study, a modified adsorbent, alginate complex beads, was prepared and applied to the removal of mixed contaminants from wastewater. The alginate complex beads were generated by the immobilization of powdered activated carbon and synthetic zeolites onto alginate gel beads, which were then dried at 110 °C for 20 h until the diameter had been reduced to 1 mm. This dry technique increased the ...
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Nano-TiO2, ultrasound and sequential nano-TiO2/ultrasonic degradation of N-acetyl-para-aminophenol from aqueous solution
The application of nano-TiO2 as adsorbent combined with ultrasound for the degradation of N-acetyl-para-aminophenol (AAP) from aqueous solution was investigated. The nano-TiO2 was characterized by means of powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), and attenuated total reflection–Fourier ...
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Treatment of wastewater contaminated with detergents and mineral oils using effective and scalable technology
In this work, effective, cheap and scalable methodology is introduced to treat oily wastewater. The water produced from car-wash processes was utilized as a model because it has various pollutants – oil, lubricants, detergents, solid particles, etc. The results showed that the turbidity and chemical oxygen demand (COD) values dramatically decrease by using the proposed treatment process, ...
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Continuous treatment of flotation collector wastewater using a membrane bioreactor
Aniline aerofloat (DDA) is a widely used material in China and has become a main pollutant in floatation wastewater. In this study, a membrane reactor (MBR) was constructed to continuously treat simulated wastewater contaminated with DDA. The study investigated the hydraulic retention time (HRT) and the impact of influent DDA concentration on MBR performance, and analyzed intermediates from ...
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Removal of PCP-Na from aqueous systems using monodispersed pompon-like magnetic nanoparticles as adsorbents
Novel monodispersed pompon-like magnetite/chitosan (Fe3O4/CS) composite nanoparticles were synthesized by a solvothermal method and used as adsorbents for the removal of toxic sodium pentachlorophenate (PCP-Na) from aqueous media. The adsorption behavior of PCP-Na on Fe3O4/CS obeyed the Langmuir isotherm and fitted the pseudo-second-order kinetics model. Thermodynamic parameters showed that the ...
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Start-up of two moving bed membrane bioreactors treating saline wastewater contaminated by hydrocarbons
This work aims to assess the acclimation of microorganisms to a gradual increase of salinity and hydrocarbons, during the start-up of two moving bed membrane bioreactors (MB-MBRs) fed with saline oily wastewater. In both systems an ultrafiltration membrane was used and two types of carriers were employed: polyurethane sponge cubes (MB-MBRI) and polyethylene cylindrical carriers (MB-MBRII). A ...
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Assessment of an aerobic treatment system for wastewater from a meat processing plant
This article presents the assessment of a wastewater treatment system by means of aerobic pools from a slaughterhouse, which presents eliminations below 80% in parameters such as BOD5, SST and grease and oils during 50% of its operating time.Keywords: wastewater treatment, contaminants, BOD, biochemical oxygen demand, TSS, total suspended solids, environmental pollution, aerobic treatment, meat ...
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Library-dependent and library-independent microbial source tracking to identify spatial variation in faecal contamination sources along a Lake Ontario beach (Ontario, Canada)
Multiple microbial source tracking methods were applied to investigate spatial variation in faecal pollution sources impacting a 1.7 km freshwater beach on Lake Ontario (Canada). The highest E. coli concentrations measured in the study area were from interstitial sand pore water at Sunnyside Beach, reaching 2.6 × 106 CFU/100 ml. These E. coli concentrations exceeded those in the nearby Humber ...
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Membrane fouling remediation in ultrafiltration of latex contaminated wastewater
The current study aimed to remediate membrane fouling by latex effluent by altering membrane surface charge or ionic strength of the effluent. Hydrophilic polysulfone and Ultrafilic flat membranes, with molecular weight cutoff (MWCO) of 60,000 and 100,000, respectively, and hydrophobic polyvinylidene difluoride membrane (PVDF; MWCO 100,000) were used under a constant flow rate and in ...
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Malachite green bioremoval by a newly isolated strain Citrobacter sedlakii RI11; enhancement of the treatment by biosurfactant addition
Citrobacter sedlackii RI11, isolated from acclimated textile effluent after selective enrichment on synthetic dyes, was assessed for malachite green (MG) biotreatment potency. Results indicate that this bacterium has potential for use in effective treatment of MG contaminated wastewaters under shaking conditions at neutral and alkaline pH value, characteristic of typical textile ...
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