install a reverse osmosis water system

... permeate velocity at membrane surface, and salt concentration profiles, including wall concentrations in RO membrane channels The numerical model was compared with the available experimental data ... concentration polarization behavior compared with that of variable flux Some other studies also suggested that the local variations of wall concentration and permeate velocity play an important role ... demonstrated that local variations of wall concentration were significantly different if variable flux was used Srinivasan and Tien (1969) further studied mass transfer characteristics of reverse osmosis...

Ngày tải lên: 15/09/2015, 22:25

... Sourirajan, S., Reverse Osmosis, Academic Press, New York (1970) Sourirajan, S., and Matsuura, T., Reverse Osmosis/ Ultrafiltration Principles, National Research Council of Canada, Ottawa, Canada ... Membrane for Single-Stage Seawater Desalination and the Concentration of Dilute Aqueous Solutions Containing Valuable Materials", Desalination, 38, 449 (1981) Lakshminarayanaiah, N., "Transport ... Recreational Reuse: An Approach to Advanced Wastewater Treatment Featuring Reverse Osmosis Membrane", Water Science and Technology, 23, 1629 (1991) Tam, C., Matsuura, T., and Tremblay, A. , "The...

Ngày tải lên: 24/03/2014, 05:20

... Microbial Diseases, Osaka University, Yamadaoka, Suita, Osaka 565, Japan Published: 22 May 1998 References Doebbeling BN, Stanely GL, Sheetz CT, et al: Comparative efficacy of alternative hand-washing ... et al Critical Care 1998, 2:79 http://ccforum.com number of bacteria after hand-washing/the number of bacteria before hand-washing)] Values are calculated from raw data and expressed as mean ... concerning compliance and costs of the system would be required to finally conclude this Author details Intensive Care Unit, Osaka University Hospital, Yamadaoka, Suita, Osaka 565, Japan 2Research Institute...

Ngày tải lên: 12/08/2014, 18:20

... membrane and form a capsular material of EPS that anchors the bacteria to the pipe surface The organisms take advantage of the macromolecules attached to the pipe surface for protection and nourishment ... resistance of the biofilm to harmful substances such as antimicrobial agents, and bacteriophage The mechanism works in such a way that the charged and hydrated EPS act as 17 Chapter Two-Literature ... DWDS are always under starvation and achieve a stationary phase growth and more veteran survivals are available after the initial disinfection under the EPS protection The work of Berg et al (1982)...

Ngày tải lên: 11/09/2015, 09:17

... the mannuronate units are partially acetylated (R= -H or -COCH3), all C-5 carbon atoms carry a carboxylate group that may be partially protonated); (b) macromolecular conformation of the alginate ... organic materials, the two most important materials are cellulose acetate (CA) and polyamide (PA) (AWWA, 1999; Byrne, 1995) CA membranes are low in cost, have good resistance against chlorine and ... contamination of the environment is to make use of secondary effluent from municipal wastewater treatment plants as a potential feed source for water reclamation to produce potable water After...

Ngày tải lên: 14/09/2015, 08:25

... driving factors (Mallevialle et al 1996; AWWA 1999; Bremere et al 2001) make RO an attractive process in water treatment and reclamation In addition, RO has many advantages over conventional separation ... expansion and high population growth, water reclamation and seawater desalination have become the inevitable means to complement the current fresh water sources Several NEWater Factories (NEWater ... wastewater treatment (Hajeeh and Chaudhuri 2000; Riley 1991; Wiesner and Chellam 1999; Vedavyasan 2000) The most common uses of RO membranes are in the seawater desalination and water reclamation...

Ngày tải lên: 15/09/2015, 17:10

... common abbreviation American Water Work Association AWWA Derjaguim-Landau-Verwey-Overbeek DLVO Coal seam gas CSG Concentration polarisation CP Reverse osmosis RO Ultra-filtration UF Micro-filtration ... total silica concentration 25mg/L and dissolved silica 20mg/L Residual aluminium recorded in raw CSG waters and in postcoagulated treated CSG waters at various coagulation doses by ACH and aluminium ... CSG water and brine management infrastructure Process flow diagram of CSG water treatment RO system – experimental arrangement and main equipment used RO experimental apparatus at the Victoria...

Ngày tải lên: 28/11/2015, 14:02

... separate data area of these database systems means that they not need the segment cleaning mechanisms of the Sprite LFS to reclaim log space The space occupied by the log in a database system can ... the most up to date ‘‘truth’’ about the state of the data on disk The main difference is that database systems not use the log as the final repository for data: a separate data area is reserved ... simulates the actions of a cleaner until a threshold number of clean segments is available again In each run the simulator was allowed to run until the write cost stabilized and all coldstart variance...

Ngày tải lên: 12/09/2012, 15:05

... What is water scarcity? Imbalances between availability and demand The degradation of groundwater and surfacewater quality International conflicts  All contributes to water scarcity Why? Scarcity ... that produce metals, wood and paper products, chemicals, gasoline and oils are major users of water Industrial water use includes water used for fabrication, processing, washing, and cooling, and ... of malaria Preventing disease  Water plays a key role in the prevention of disease  Improved water quality, sanitation and personal hygiene significantly reduce the spread of these and many...

Ngày tải lên: 25/04/2013, 15:20

... TCE degradation were examined MATERIALS AND METHODS TCE (99+%) was obtained from Aldrich Chemical Co, and the TiO2 used was Degussa P-25, which was mostly anatase and had a BET surface area of 50-m2/g ... one-pass solar detoxification system (Pacheco et al., 1993) and contaminated surface water can be treated in a UV concentrating radiation System (Yves et al., 1996) In this process, major toxic ... GC/MS analysis; and were dichoacetic acid (DCAA), the methyl esters of dichloroacetic acid (DCAA) and trichloroacetic acid (TCAA), respectively They were confirmed by comparison of mass spectra and...

Ngày tải lên: 05/09/2013, 08:40

... the pollutants concentration was low in the rain season (from May to October) The data from the local weather station showed that the average annual rainfall and evaporation was 802mm and 2093mm, ... domestic wastewater in Lake Dianchi Valley., Proceedings of Asian waterqual’2003, IWA Asia-Pacific Regional conference, Abstract on pp 70, Paper on CD-ROM, Bangkok Liu, C.X., Hu, H.-Y., Huang, X., ... adopted to treat a typical village sewage There is the long rain season in local place always accompanied with strong storms at the beginning The stormwater runoff not only brings the large amounts...

Ngày tải lên: 05/09/2013, 08:40

... tetracycline-degrading bacteria and the mechanism of tetracycline degradation MATERIALS AND METHODS Water samples were collected from the effluent of a small wastewater treatment plant with an activated ... following samples: Tedori River water (5 and 10 mg/L), wastewater treatment plant effluent (10 mg/L), and rain water (5 and 10 mg/L) More than 20% degradation was observed in all Lake Tedori water and ... density and tetracycline degradation Table - Results of tetracycline degradation test for Unoke River water and wastewater treatment plant effluent Sample Volume Unoke River Water Wastewater Treatment...

Ngày tải lên: 05/09/2013, 10:15

... Van Genuchten [31] The parameters used for validation of the numerical results with the analytical solution for radionuclides and colloids are presented in Table and The base case data pertaining ... coefficient attains an asymptotic value As filtration of colloids is progressively increased, dispersion reduces and attains a constant value It can be concluded that significant mixing prevails along ... Sudicky, E .A. , and Frind,E.O Contaminant transport in fractured porous media: Analytical solutions for a system of parallel fractures Water Resources Research.1982 18(6), 1634-1642 [31] Van Genuchten,...

Ngày tải lên: 05/09/2013, 17:03

... Ryuichi Shimada, Jan A Wiik, Takanori Isobe, Taku Takaku, Noriyuki Iwamuro, Yoshiyuki Uchida, Marta Molinas, and Tore M Undeland A new ac current switch called mers with low on-state voltage igbts ... mode the capacitor voltage goes to zero during each cycle As a result of the control, the MERS can act as a variable capacitor The size of the capacitive injected series voltage can be varied from ... characteristics and thermal capability has been investigated An average peak junction temperature of 125°C and 80°C heat sink temperature has been assumed Over-current capability of 25% has also been included...

Ngày tải lên: 15/10/2013, 16:11

... building graph and a calculation of the shortest paths by using Dijkstra’s algorithm An evacuee becomes aware of a hazardous area when it reaches a location close to it This triggers an update in ... hazard A low value indicates that the system has succeeded in directing the evacuees along safe paths, avoiding the hazardous locations • Percentage of fatally injured evacuees This is a straightforward ... evacuation The actors that take part in the simulation are modeled as agents Each one has its own health model and movement model that depend on the individual characteristics of the actors and...

Ngày tải lên: 07/12/2013, 11:41

... Analysis with Spreadsheets Duxbury Press, Belmont, CA Kleinmuntz, C.E., Kleinmuntz, D.N., 1999 A strategic approach to allocating capital in healthcare organizations Healthcare Financial Management, ... multicriteria value analysis and decision conferencing: A case study International Transactions in Operational Research, 13(4), 279-297 Bana e Costa, C .A. , Lourenço, J.C., Soares, J.O., 2007 An interval ... prioritization approach However, the prioritization approach can easily deal with a large number of projects, contrary to knapsack optimization algorithms Indeed, the knapsack problem (4) is technically...

Ngày tải lên: 07/12/2013, 11:41

... alarm system, but merely illustrates that the home automation system can interface with a larger existing alarm system The alarm interface unit provides the home alarm system with an arm/disarm ... that carries any amount of noise, it is possible to transmit data reliably (that is, with an error probability of zero) as long as the data rate is below a certain limit known as the channel capacity ... Signal attenuation on a powerline across the 0-300 kHz frequency band Figure taken from Chan and Donaldson [3] From the above analyses of noise and attenuation it is clear that choosing a good carrier...

Ngày tải lên: 19/01/2014, 20:20

... etc A QC can be mathematically defined as a random variable, which is a function that takes values from a population or distribution Denote a QC as random variable x If a population Ω only contains ... variation change Notice that SPC charts are designed to detect assignable causes of variation as indicated by mean or standard deviation shifts and at the same time tolerate the chance variation as shown ... statistical control charts for monitoring process variance changes Johnson and Leone (196 2a, 1962b) and Page (1963) later proposed CUSUM charts based on sample variance and sample range As an alternative,...

Ngày tải lên: 23/01/2014, 01:20

... are multiple routes to a largescale breakdown in the global financial system, comprising systemic banking collapses, monetary system failure, credit and financial asset vaporization This breakdown, ... communities, in particular the nation state and the psycho-drama within and across nations, and our real dependencies, which are globalised National economies can have local character and limited ... means that there are many more places and events that can transmit failure, and major structural stresses can build at a global scale There is less local resilience to failure, in that we cannot...

Ngày tải lên: 17/02/2014, 21:20

... storage, access, and reporting of financial data Manages purchases of goods and services Central Data Base Maintains transaction details and structural data e.g., Chart of Account Budget Manages ... budget preparation Accounts Payable Manages payments Cash Management Monitors cash position and analyzes cash flows Accounts Receivable Manages revenue Asset Management Maintains records of major government ... situation later In 2003, a team from the IMF advised the CPA and USAID against implementing an automated financial-management system before a formal requirements analysis was conducted The CPA and...

Ngày tải lên: 18/02/2014, 04:20