Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Chlorine Demand"”.
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Chlorine demand in Haitian water supplies
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2002.
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An investigation of the methods used in the determination of the chlorine demand of settled sewage
The chlorine demand correlations, which exist in the settled domestic sewage at the V.P.I. Sewage Treatment Plant between the limits of one and seven ppm, of applied chlorine dosage were determined.
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A comparison of two membrane filter techniques for the enumeration of total coliforms in potable water
… techniques on coliforms exposed to varying chlorine residuals and contact times. An enrichment-step membrane-filter method (E-MF) involved the incubation of a filtered water sample on lauryl tryptose plus 1.5 per cent agar for two hours at 35°C prior to transfer of the filter to LES-Endo …
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Performance and microbial community structure of Midwestern groundwater pretreatment reactors
… recently as water utilities seek to minimize chlorine demand and potential disinfection byproduct formation. Many plants are forced to chlorinate before primary filtration in order to meet disinfection requirements, so a pretreatment configuration is the one of the few feasible locations for …
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Field study of performance of rectangular chlorine contact tanks
… of the efficiency of three types of rectangular chlorine contact tanks. Efficiency of the tanks was evaluated in terms of the type of initial mixing of the chlorine and fluid, location and configuration of the inlet and outlet structures, the influence of baffles and the effect of sludge …
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Synergy of Alum and Chlorine Dioxide for Curbing Disinfection Byproduct Formation Potential at Central Arkansas Water
… has begun retrofitting their two plants to use chlorine dioxide as an alternative primary disinfectant followed by free chlorine secondary disinfection in the distribution system. In this study, fluorescence parallel factor (PARAFAC) analysis was combined with free chlorine simulated …
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Formation of Chloroform and Other Chlorinated Byproducts by the Chlorination of Antibacterial Products
… been established that pure triclosan and free chlorine readily react, interactions between triclosan-containing products and free chlorine have not previously been analyzed. Sixteen double-blinded solutions including both triclosan-containing (1.14-3.12 mg triclosan/g product) and …
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Removal of disinfection by-product precursors by activated carbon and MIEX(R)
… of brominated DBPs. SUVA, UV254, DOC, and chlorine demand were all investigated as surrogate parameters for DBPs. UV254 was found to correlate best with DBP formation with 0.56<R2<0.80. UV254 absorbed by HPO NOM was found to correlate best with TTHM FP (R2=0.88) with HPI being poorly …
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Performance Evaluation of the Town of Monterery Wastewater Treatment Plant Utilizing Subsurface Flow Constructed Wetlands
… reduced compounds that contribute to the chlorine demand. This study attempts not only to distinguish the factors leading to the inadequate performance of the SF wetlands in removing organic matter and nitrogen, but also to identify the cause of the frequent occurrences of a nondetectable …
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Biostability In Drinking Water Distribution Systems Study At Pilot-scale
… systems. Use of less reactive (i.e. with less chlorine demand) pipes is recommended in order to prevent residual depletion and subsequent bacterial proliferation.This study is investigated biofilm growth simultaneously with suspended growth under a wide range of water quality scenarios and pipe …
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Influences of Water Chemistry and Flow Conditions on Non-Uniform Corrosion in Copper Tube
… in copper tube, specifically in waters with high chlorine and a high pH. These two parameters can further act synergistically to alter pitting propensities in copper pipes subjected to this type of water. A preliminary short-term experiment considered pitting propensity in copper pipe as a …
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Evaluation of Glycerol and Waste Alcohol as Supplemental Carbon Sources for Denitrification
… reactors demonstrated an increased carbon demand over time. The commonly reported hypothesis that activated sludge transitions from a generalist population of ordinary heterotrophic organisms (OHO) that use substrate, glycerol in this case, less efficiently, producing low yields and slow …