membrane disinfectant Articles
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Environmental implications and applications of carbon nanomaterials in water treatment
Carbon nanomaterials have been proposed as a basis for developing new technologies for photocatalytic oxidation and disinfection, improved membrane processes, adsorbents, and biofilm-resistant surfaces. This study details recent progress towards the development of these proposed applications. We explored the use of carbon nanomaterials such as fullerene C60, single-wall carbon nanotubes (SWCNTs), ...
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Isolation of surfactant-resistant bacteria from natural, surfactant-rich marine habitats
Environmental remediation efforts often utilize either biodegradative microbes or surfactants, but not in combination. Coupling both strategies holds the potential to dramatically increase the rate and extent of remediation because surfactants can enhance the bioavailability of contaminants to microbes. However, many surfactants permeabilize bacterial cell membranes and are effective ...
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Fluorescent-conjugated MS2 as surrogates for viruses during drinking water treatment
Microfiltration/ultrafiltration (MF/UF) membranes and ultraviolet (UV) light disinfection serve as attractive alternative technologies to aid utilities in complying with both the LT2ESWTR and Stage 2 D/DBP. However, both technologies are limited in their ability to remove viruses and at the same time there is a lack of methods to accurately demonstrate virus removal in full-scale settings. In ...
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Preparation and surface modification of hollow fibre membranes for drinking water disinfection and water reclamation
Polysulphone hollow fibres were spun according to phase inversion process under different conditions by extrusion of dimethylformamide solution of the polymer through double orifice spinneret using water or water-DMF mixture as gelation medium. The membrane surface was modified by in situ interfacial polymerisation of m-phenylenediamine with trimesoyl chloride. The nominal molecular weight ...
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Singapore a model for effective water management
Singapore continues to be a model of effective water management as more and more countries begin experiencing water scarcity. To some, the Asian city-state (which occupies an area roughly a quarter the size of Rhode Island) may seem an unlikely beacon for water efficiency. But, to achieve water security and self-sufficiency, residents have been helping leaders meet national water management ...
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Sewage Water - Nan Shui Municipal Sewage Water Purification Project
Project Introduction The designed treatment capacity is 230000 m3 sewage per day. 20% is domestic sewage and 80% is industrial sewage. Biochemical process adopts A/ O treatment process. After membrane filtration, Ozone Capacityis added for disinfection, decolorization and degrade COD. Treatment Capacity: 230,000 t/d Influent Quality Index (COD): 40-50mg/L Effluent Quality Index (COD): 20mg/L ...
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Performance of chlorination process during nanofiltration of sulfonamide antibiotic
The effectiveness of combined nanofiltration and disinfection processes was studied by comparing the pre-disinfection and post-disinfection when in combination with nanofiltration. Four types of sulfonamide (sulfanilamide, sulfadiazine, sulfamethoxazole, and sulfadimethoxine) were chosen as substrates, with sodium hypochlorite as a disinfectant. A laboratory-scale nanofiltration system was ...
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Optimization of the coagulation–flocculation process for the removal of natural organic matter fractions present in drinking water sources
We used an experimental design to determine the best coagulation–flocculation mechanism and the optimal operating conditions for the maximum removal of the natural organic matter fractions (hydrophobic acid (HPOA) and hydrophilic neutral (HPIN)), which are the main factors responsible for irreversible membrane fouling and the generation of disinfection by-products (DBPs). Charge ...
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Comparison of the role of attachment, aggregation and internalisation of microorganisms in UVC and UVA (solar) disinfection
In this comparative study, the impact of two microbial protective mechanisms against simulated UVA disinfection was assessed by using protocols previously developed for UVC disinfection assays. (i) The impact of natural microorganism aggregation and attachment to particles was assessed by targeting total coliform bacteria in natural surface water samples. (ii) The impact of bacteria ...
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Aquifer recharge with reclaimed water: life-cycle assessment of hybrid concepts for non-potable reuse
Aquifer recharge with reclaimed water is a promising means to store and supply on demand reclaimed water of high quality for further non-potable reuse. The reuse applications may include indirect agricultural or landscape irrigation, saltwater intrusion barriers, subsidence mitigation or aquifer replenishment. As an alternative to high-pressure or double-membrane systems, hybrid schemes ...
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Development and evaluation of a small scale water disinfection system
Provision of microbiologically safe drinking water for people living in the rural areas of developing countries remains a major challenge to date. A simple gravity-driven membrane point of use system was developed based on woven fabric microfiltration (WFMF) membranes. The WFMF is a loose type of membrane (0.45 μm). However, complete disinfection is not achieved with the WFMF, hence it was ...
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Water Treatment Solutions To Address Water Scarcity
We can see through the past, present and into the future that water is life. Without water we cannot sustain life and we have no alternatives. Many think that water will become an issue larger than petroleum to people, governments and businesses across the world. GWT designs ane provides sustainable water solutions to meet water scarcity challenges across the world. Over 97% of the earth is ...
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GWT Innovation in Water Solutions To Meet Water Scarcity Across The World
We can see through the past, present and into the future that water is life. Without water we cannot sustain life and we have no alternatives. Many think that water will become an issue larger than petroleum to people, governments and businesses across the world. Over 97% of the earth is covered by water; however, only about 3% of the water is suitable for consumption by plant, human, and animal ...
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Interest grows in OPEX saving UV water treatment technology used for enhanced oil recovery - Case Study
UV light is a chemical-free, physical disinfection technique that is widely used throughout the offshore sector. atg UV Technology, a UK manufacturer of water treatment packages for the Oil and Gas sector have seen growing interest in the application of UV disinfection for the treatment of sea water used for well injection in enhanced oil recovery applications. UV light is a ...
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Suitability of cationic flocculants for RO membranes performance improvement
Abstract As it has already been published and demonstrated, one of the main causes of membranes failures is related to a poor plant pre-treatment. Data from more than 600 autopsies demonstrated that both biofilm and colloidal matter are the most common components on RO (reverse osmosis) membranes fouling, therefore, main lack on membranes pre-treatment is related to disinfection and small size ...
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Handling food processor wastewater treatment surprises with automatic scraper strainers
For food processors, removing suspended solids such as fats, grease, grit, contaminants, and leftover process materials from liquids is necessary to comply with regulations like the EPA’s Clean Water Act, which sets wastewater standards for industry and national water quality criteria for pollutants in surface waters. To remain compliant, processors often use clarifiers, also known as ...
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Pulp and Paper Industry Facing Water Issues
Water-reuse and waste-to-energy technologies can lessen environmental impact The pulp and paper (P&P) industry is one of the largest users of water in the industrial economy of the United States. It requires an average of 54 m3 of water to produce a metric ton of pulp or paper, and almost all phases of manufacturing require water. On the downstream side, P&P mills also create ...
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Replacing chlorine water treatment With Alstasan Silvox
Water Treatment, a chain of process carried out to purify water with different desired end results. These include physical as well as chemical means. Visible impurities can be removed through physical means like filtration, sedimentation and decantation but problem arises for invisible pathogenic organisms which can only be removed through chemical addition. Various advanced chemical technology ...
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Retirement community graywater reuse - Australia case study
Project Background or Rationale RSL Care’s Sunset Ridge Retirement Community resides near the Pacific coast in Zilzie, Queensland, Australia. The retirement community includes 100 independent living villas, a 120-bed aged care residential complex, and resort style facilities. Although Zilzie averages 31 in (79 cm) of annual rainfall, RSL Care sought to install a graywater recycling system ...
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The Use Of UV For Dechlorination
For many years chemical disinfection techniques have been used to provide microbiologically pure water for industrial and domestic use. Free chlorine, typically introduced by municipal water treatment plants in gaseous form, has been employed for many decades as a primary oxidising agent for the control of microbiological growth. Free chlorine can also be introduced through the injection of ...
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