Effect of water quality parameters on solar water disinfection: a statistical experiment design approach

Autor:	Shilpa Dave, M. Mansoor Ahammed, Abhilash T. Nair
Rok vydání:	2014
Předmět:	Design of experiments Ocean Engineering Polyethylene Pollution Coliform bacteria chemistry.chemical_compound Solar water disinfection chemistry Environmental chemistry Environmental science Water treatment Water quality Response surface methodology Turbidity Water Science and Technology
Zdroj:	Desalination and Water Treatment. 56:315-326
ISSN:	1944-3986 1944-3994
DOI:	10.1080/19443994.2014.940398
Popis:	With a view to evaluating the effects and interactions of three influential factors, turbidity, pH and dissolved oxygen (DO), on the efficiency of solar water disinfection process, response surface methodology (RSM) based on Box–Behnken design was employed. Total coliform (TC) removal and heterotrophic plate count (HPC) removal were used as response factors. The RSM models were developed based on the experimental results of four-hour solar exposure in polyethylene terephthalate bottles. The measured and predicted removals were close to each other. Though the HPC removal and TC removal showed similar trends, the HPC removal was much lower (40–66%) compared to TC removal (68–97%) for the conditions studied. The results showed that turbidity up to certain levels (10–20 NTU) did not adversely impact the bacterial removal. In the range studied (6.0–9.5), pH showed little influence on the removals. While bacterial inactivation showed significant reduction at low DO levels, increasing DO beyond a certain...
Databáze:	OpenAIRE
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