sand rendering to sprayed concrete walls
swimming pools 4ed philip h perkins 2
Ngày tải lên :
23/03/2014, 20:36
... Cement -sand rendering to insitu concrete walls Cement -sand rendering to sprayed concrete walls Cement -sand rendering to concrete block walls Cement -sand screeds on insitu concrete floors Cement -sand ... Remedial work to thermal contraction cracks Remedial work to drying shrinkage cracks Remedial work to honeycombed concrete Inadequate concrete cover to the reinforcement Remedial work to existing ... Preventing trips and falls Repairs to external works: walling 10.13 Remedial work to free-standing walls 10.14 Remedial work to earth-retaining walls Remedial work to pools under construction 10.15...
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ESTROGENIC ACTIVITY LEVEL OF NAKDONG RIVER BASIN AND ITS CONTROL BY WATER TREATMENT PROCESSES
Ngày tải lên :
05/09/2013, 08:40
... Koichi Saito, Jun Goto, Fumi Dakeyama, Masatoshi Matsuo, and Tsutomu Nishihara (1999) New screening methods for chemicals with hormonal activities using interaction of nuclear hormone receptor with ... sludge, The Science of the total Environment, 225, 91-99 Tasuku Kamei, Meea Kang, Hyunokoo Kim, Yuko Sato, Motoyuki Kamata, Yasumoto Magara (2002) Rapid and Comprehensive indicator for evaluating the ... active ligand, the occupied receptor then binds to the estrogen-response sequences (EREs) and interacts with transcription factors and other transcriptional components to modulate gene transcription...
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Tài liệu Water Treatment and Pathogen Control docx
Ngày tải lên :
26/02/2014, 20:20
... from 27 to 74% for viruses, 32 to 87% for bacteria (total coliforms or faecal streptococci) and to 94% for algae (Gimbel & Clasen, 1998) It is difficult to interpret full-scale data for Cryptosporidium ... Off-stream storage In this discussion, off-stream storage refers to a storage reservoir that directly or indirectly feeds a potable water intake The effects of off-stream storage are difficult to generalize ... and sand from the top layer of the sand bed, before being returned to service A typical filter run is from one to six months, depending on the raw water quality and filtration rate After the sand...
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New technologies or innovative treatment lines for reliable water treatment for P&P and minimization of waste production ppt
Ngày tải lên :
09/03/2014, 00:20
... Water to be re-used ? AOP (Fenton) RO Water to be re-used ? AOP (O3/H2O2) MBR Water to be re-used ? AOP (O3) Anaerobic process Water to be re-used ? Water to be re-used ? AOP (Photo-Fenton) AOP ... (O3) Possibility to reinject into biological processes? Fenton Biodeg tests Possibility to reinject into biological processes? Evapo 3FM Biodeg tests Water to be re-used ? NF Water to be re-used ... Aerobic process 3FM Water to be re-used ? AOP (O3) Water to be re-used ? Anaerobic process Evapo Water to be re-used ? AOP (Fenton) Biodeg tests Possibility to reinject into biological processes...
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Combined household water treatment and indoor air pollution projects in urban Mambanda, Cameroon and rural Nyanza, Kenya ppt
Ngày tải lên :
15/03/2014, 16:20
... of beans in half the time as a three‐stone stove. Tests also revealed 50% fuel efficiency using MMS, as compared to 37% with a there‐stone stove. In contrast to the testing done in Kenya, in Cameroon tests on emissions of or indoor levels of particulate matter were not conducted. ... Of the target population, 90% was expected to have access to safe drinking‐water and 60% to be using fuel efficient stoves by the end of the project. The integrated approach was expected to bring overall efficiency, particularly in cost and time. They expected ... To date, scaling up of the improved stoves across this wider area has been very slow, due to the need to scale up production, and also for training of installers. Consideration also needs 14 to be given now to the implications of the results of the Upesi stove evaluation, since ...
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Chemical of alumina reactions in aqueous solution and its application in water treatment
Ngày tải lên :
15/03/2014, 23:22
... adsorption affinity of polyols (2,3-butanediol, glycerol, erythriol, threitol, ribitol, arabinitol, xylitol, mannitol, dulcitol and sorbitol) is determined by the number of vicinal hydroxy groups present, ... Cly ternary complexes similar to those that predominate at pH 5.06.0 on goethite were found This can be ascribed to the inability of Cly to bond to surface Al atoms w13,181x Similar results were ... the ability to proton abstractionacceptation Lewis aciditybasicity is the ability to electron acceptationabstraction w42x Chemisorption of water on the alumina surface is considered to be a reaction...
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Butterworth heinemann handbook of water and wastewater treatment technologies
Ngày tải lên :
16/03/2014, 18:11
... sand is added to a SSF to a minimum depth of 0.6 meters Additional thickness will allow more cleanings before the sand must be replaced 0.3 to 0.5 meters of extra sand will allow the filter to ... filter itself is a large box The walls should be as rough as possible to reduce the tendency for water to run down the walls of the filter, bypassing the sand The bottom layer of the filter is a ... TECHNOLOGIES the sand The sand for a SSF needs to be clean and uniform, and of the correct size The sand can be cleaned in clean running water , even if it is in a creek The ideal specs on sand are effective...
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WASTE WATER TREATMENT TECHNOLOGIES AND RECENT ANALYTICAL DEVELOPMENTS potx
Ngày tải lên :
29/03/2014, 21:20
... disciplines related to waste water We would like to ac‐ knowledge the authors, who are from different countries, for their contributions to the book We wish to offer special thanks to the Publishing ... on top of 14.7 mm in (6 in) of 0.4 mm sand When the filter backwashed to remove the suspended impurities that accumulate during the run, the less dense medium, the coal, is washed to the top ... a foundation for induction it is at once too narrow and too powerful On the other hand, logic is too pow‐ erful because the need to acquire knowledge automatically from environment and integrate...
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handbook of water and wastewater treatment plant operations frank r. spellman
Ngày tải lên :
01/04/2014, 11:46
... chief operator, lead operator, operator, maintenance operator, distribution and/or interceptor system technicians, assistant operators, laboratory professionals, and clerical personnel, to list ... Calculation of Total Inductance Practical Electrical Applications 6.24.1 Electrical Power Generation 6.24.2 DC Generators 6.24.3 AC Generators 6.24.4 Motors 6.24.4.1 DC Motors 6.24.4.2 AC Motors 6.24.5 ... from century to century, decade to decade, year to year, and site to site They range from the problems caused by natural forces (storms, earthquakes, fires, floods, and droughts) to those caused...
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boiler water treatment principles and practice vol 1 & 2
Ngày tải lên :
02/04/2014, 15:21
... order to attain and maintain optimum day -to- day boiler waterside operating conditions, owners and operators will continue to need the very best technical advice and other services possible to manage ... temperature t time TDS total dissolved solids TFC thin film composite TH total hardness THM trihalomethane TOC total organic carbon TQM total quality management ... lignite) = 8,500 to 11,500 Btu/lb • Lignite = 7,000 to 9,000 Btu/lb • Peat = 5,000 to 7,000 Btu/lb • Bagasse = 3,500 to 4,500 Btu/lb • Wood = 2,500 to 3,000 Btu/lb ...
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drinking water treatment focusing on appropriate technology and sustainability
Ngày tải lên :
30/05/2014, 22:56
... Storage is also required to mitigate peak demand, and therefore maintaining the purity of the stored water is an introduced maintenance factor However, due to their simplicity and size, slow sand ... complicated by expanding to a 10m2 basin as long as there is a minimum of 0.7m of fine sand, and time is given for the biofilm to form Material access to sand, gravel, and materials to construct the ... opposed to 820% for sand filtration) and total organic compounds (TOC) (5575% as opposed to õ
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Fate of Pharmaceuticals in the Environment and in Water Treatment Systems - Chapter 1 pot
Ngày tải lên :
18/06/2014, 16:20
... standardized to allow easier intercomparison between laboratories International interlaboratory method comparisons also need to be developed to establish a benchmark for existing methods Monitoring ... that needs to be included in multiple media assessments Intimately linked to multimedia assessments, and reflected in this review, is the need to monitor not just parent PPCPs but also to determine ... used to reduce fever, pain, and inflammation from headaches, toothaches, backaches, and similar conditions • Ketoprofen—an NSAID used to reduce pain, inflammation, and stiffness from rheumatoid...
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Fate of Pharmaceuticals in the Environment and in Water Treatment Systems - Chapter 2 docx
Ngày tải lên :
18/06/2014, 16:20
... their ionized form; therefore, the sample pH has to be adjusted to a pH between to in order to protonate the carboxylic and hydroxyl groups in order to achieve high and reproducible recoveries First ... a chelating agent to decrease the tendency for those compounds to bind to cations into the matrix To improve the resolution and peak shape of the tetracyclines in the chromatographic column, ... believed to result from the competition of the analyte ions and the matrix components for access to the droplet surface to the gas-phase emission A feasible solution to address this issue is to use...
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Fate of Pharmaceuticals in the Environment and in Water Treatment Systems - Chapter 3 pdf
Ngày tải lên :
18/06/2014, 16:20
... sometimes added to extraction solvents to increase the solubility of analytes in the extraction solvents and to improve extraction efficiencies Some compounds such as tetracyclines are known to form ... important to ensure proper sample storage and to account for possible biodegradation when evaluating extraction methods For instance, the extraction recoveries for ibuprofen were improved from 25 to ... sulfachloropyridazine ranged from 77 to 102% and 58 to 89%, respectively, using a concentration range of to 20 mg/L A similar extraction method (with methanol added in the solvent) was used to extract soil that...
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Fate of Pharmaceuticals in the Environment and in Water Treatment Systems - Chapter 4 potx
Ngày tải lên :
18/06/2014, 16:20
... Agents for MRI 103 Air Toxicity to Unicellular Algae Producers (photosyn organisms) Consumers (e.g., zooplankton) Inorganic Nutrients Degradation by Sewage Bacteria Toxicity to Daphnia Consumers ... are used here The use of a factor of 1000 on short-term toxicity data is a conservative and protective factor and is designed to ensure that substances with potential to cause adverse effects are ... fungal, and algal microbes (Pseudomonas putida, Azotobacter beijerinckii, Aspergillus niger, Caetomium globosom, and Nostoc ellipsosporum) were exposed to graduated concentrations of gadobutrol The...
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Fate of Pharmaceuticals in the Environment and in Water Treatment Systems - Chapter 5 pot
Ngày tải lên :
18/06/2014, 16:20
... studies it may be possible in the future to begin to understand those factors and processes affecting the uptake of veterinary medicines into plants and to develop modelling approaches for predicting ... manure and slurry stores is anaerobic, whereas degradation in soils is most likely due to aerobic organisms Drugs administered to grazing animals may be deposited directly to land or surface ... onto farmyard hardsurfaces (e.g., concrete) may be washed off to surface waters during periods of rainfall 5.3 FATE OF VETERINARY MEDICINES IN SOILS Once a veterinary medicine is released to...
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Fate of Pharmaceuticals in the Environment and in Water Treatment Systems - Chapter 6 pptx
Ngày tải lên :
18/06/2014, 16:20
... complete conversion of E2 to E1 and complete mineralization to CO2 were enhanced when swine manure slurry was added to a loam soil (10% v/ w) Testosterone transformation to androstenedione was also ... CaCl2 compared to NaCl Figueroa et al.18 also observed that an increase in ionic strength from 10 mM to 510 mM by the addition of Na+ decreased by a factor of almost 13 and by a factor of about ... complex between the metal and the deprotonated -keto acid In contrast, CIP formed only a monodentate complex between the deprotonated carboxylate group and an Al atom Earlier work by Nowara et al.40...
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Fate of Pharmaceuticals in the Environment and in Water Treatment Systems - Chapter 7 pot
Ngày tải lên :
18/06/2014, 16:20
... also are differentially less sensitive to some factors or metabolites and more sensitive to others The major advantage to the high performance liquid chromatography (HPLC) or LC/MS method is the ... equivalent to the moisture addition of the treated columns After application the top cm of the columns were raked with a sterilized spatula to simulate the incorporation of manure into soil that ... factors using LC/MS/MS, we found that tylosin A accounted for approximately 22% of the total tylosin residues; this corresponds to a concentration of 0.2 ng/mL Tylosin D, another major factor,...
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Fate of Pharmaceuticals in the Environment and in Water Treatment Systems - Chapter 8 potx
Ngày tải lên :
18/06/2014, 16:20
... and Storage Compounds to Sewage Sludge Ecological Sanitation Application to Agricultural Fields FIGURE 8.1 Pathways of pharmaceuticals to agricultural soils since they have been developed to remain ... tetracyclines to clays showed differences for K- and Ca-saturation due to cation bridging, with humic substances being an additional factor.24 Kinetics also have to be taken into account.25 With ... performed as described above, the leachate was diluted by a factor of 100 to 10,000, soil extracts by a factor of to 100 (SMZ) and to 10,000 (SMX), respectively 8.4 RESULTS 8.4.1 ELISA MEASUREMENTS...
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