Granular filtration remains a key barrier for Cryptosporidium removal in water treatment plants without UV irradiation. To assess the impact of clay particles in source water on Cryptosporidium removal efficiency by granular filtration, this study investigated the co-transport of Cryptosporidium-sized microspheres and kaolinite particles in sand columns. To investigate the influence of clay load on microsphere transport and deposition, varying influent kaolinite concentrations (0–106particles/mL) and microsphere concentrations (102–106microspheres/mL) were tested. The spatial distribution of retained microspheres was examined subsequent to experiments via filter coring. Results demonstrate that increasing the influent microsphere concentration impaired filter performance due to a blocking mechanism whereby previously retained particles repel incoming particles. In contrast, when the particulate load was dominated by kaolinite (for an equivalent particulate load), filter performance improved as a result of filter ripening whereby previously deposited particles act as additional collectors. Thus, microsphere-kaolinite interactions proved to be favorable although both particles possessed negative zeta potentials in the tested conditions. This study demonstrates that granular filter performance is vulnerable to peak events of microbial contamination. Conversely, Cryptosporidium-sized microsphere removal by granular filtration is enhanced in the presence of kaolinite in source water.
Frozen food production: closed loop installation reduces water consumption by 50%
Pasfrost is a Belgian food processing company and supplier of frozen vegetables that wanted to reduce its use of groundwater by 50%. Local groundwater levels were dropping and the quality of water was deteriorating, so an alternative, sustainable solution was needed. Paques designed and installed a closed loop installation. The wastewater undergoes anaerobic and aerobic treatment and is further upgraded by ultra-filtration. This...
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Olansi Healthcare Co., Ltd (Guangzhou Olans Water Treatment Equipments Co., Ltd) is a professional manufacturer of Hydrogen Water Generator/hydrogen water maker,Air Purifier, Water Purifier etc health-care products.
Olansi Products
Olansi now has launched some series hydrogen water bottles, hydrogen water pitchers/jars for health-care products retailer, wholesaler,distributor etc.
About hydrogen water benefits from hydrogen water maker, there are many health benefits that are associated with hydrogen water....
4 Tail Pumps for Evides "Braakman Pump Station".Evides Water Company supplies drinking water in the southwest of Holland, Zeeland and Brabant Walonie. Evides also produces various types of water for the domestic and foreign industry and is active in wastewater treatment.TAE pumps for EvidesAfter a successful qualification traject in 2012, Rodelta Pumps International BV has been placed on Evides’ favorite list. At the beginning of 2013, Rodelta received the assignment for the delivery of 4 tail pumps of type...
A new dispersive liquid–liquid microextraction method based on the solidification of a floating organic drop was developed for the preconcentration of indomethacin in natural waters followed by ultraviolet-visible (UV-Vis) spectrophotometric detection. 1-undecanol and ethanol were used as the extraction solvent and the disperser solvent, respectively. An investigation of the main experimental parameters that may affect the extraction efficiency, such as sample pH, volume of extraction and disperser solvents,...
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