Fate of nonyphenol componds in aerobic semi-continuous reactor

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2012

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Ahmad., Muneer

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In the last few decades, numerous studies have been conducted on xenobiotic compounds due to their vast use in industries, households, etc. and consequently high exposure of these compounds. The main focus of this study is nonylphenol compounds such as nonylphenol monoethoxylate (NP1EO), nonylphenol diethoxylate (NP2EO), nonylphenoxy acetic acid (NP1EC) and nonylphenol (NP), which are among the harmful xenobiotic compounds that can cause endocrine disruption, cancer and other health problems and which are used widely in the production of surfactants and personal care products. In this study, laboratory scale aerobic semi continuous reactors containing Waste Activated Sludge (WAS) spiked with NP2EO were operated for a period of 91 days, to inspect the decomposition of NP2EO in solid and liquid phases. The results obtained on the final day of operation (91st day) showed that NP2EO degraded into product compounds among which NP1EC contributed to 90% of molar mass. In general, NP2EO showed a sharp degradation while NP1EC was produced rapidly. NP1EO also showed a steady degradation. However, NP was accumulated in the reactor. During the study, TS, VS, TSS and VSS degradation was also monitored and the percentage removals were found to be between 40-60%. COD removal on the other hand was between 64-66%.

Subject Keywords

Phenols., Acetic acid., Aerobic bacteria., Sewage sludge.

URI

http://etd.lib.metu.edu.tr/upload/12614540/index.pdf
https://hdl.handle.net/11511/21711

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

M. Ahmad., “Fate of nonyphenol componds in aerobic semi-continuous reactor,” M.S. - Master of Science, Middle East Technical University, 2012.