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 5 of 5 for “"Nitrites and nitrates"”.
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Acute and chronic effects of ammonia in the South African abalone, Haliotis midae Linnaeus (Mollusca)
… end-product of protein catabolism in abalone, and is excreted into the surrounding water. Build-up of ammonia in abalone aquaculture systems can reach high toxic levels and impact negatively on farming operations. Ammonia levels therefore have to be regulated. Accurate estimates of toxic …
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Treatment of urban stormwater runoff by sedimentation
… would be constructed to control runoff flows and/or sediment loads. Approximately twenty liters of stormwater runoff were placed in each of four Plexiglas columns, and samples were withdrawn from column sampling ports immediately following sample addition, and after two, six, twelve, …
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Land-Use Changes in Southwestern Guatemala: Assessment of their Effects and Sustainability
Land-use changes in the Pacific coastal plain of southwest Guatemala have accelerated in the past twenty years as native arable and pasture lands have been converted at an increasing rate to oil palm and banana plantations. This study of the changes during this period has been made by …
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Nitrification Investigation And Modeling In The Chloraminated Drinking Water Distribution System
… drinking water distribution systems in a one and a half year field study. Seven finished waters were produced from different treatment processes and distributed to eighteen pilot distribution systems (PDSs) that were made pipes taken from actual distribution systems. Unlined cast iron (UCI), …
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Ricerca delle fonti di contaminazione in acquedotti e fognatura: definizione di un approccio integrato
… procedure di calibrazione con soluzioni standard, e test sperimentali su banco di prova a condizioni controllate. I risultati mostrano che il sistema fornisce misure quantitative affidabili e confrontabili con le analisi di laboratorio convenzionali (ad esempio, le concentrazioni di NH4+ e …