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Investigation of oily wastewater treatment processes. / Ifeyinwa Charlotte Okam

Swansea University Author: Ifeyinwa Charlotte Okam

Abstract

"With the ever-increasing price of oil and increasingly stringent environmental regulations, effective treatment of oily wastewater has become very important. Industry currently seeks to find cost-effective solutions to meeting discharge limits by integration of oil recovery units with biologic...

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Published: 2008
Institution: Swansea University
Degree level: Master of Philosophy
Degree name: M.Phil
URI: https://cronfa.swan.ac.uk/Record/cronfa42786
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spelling 2018-08-16T14:39:02.9105634 v2 42786 2018-08-02 Investigation of oily wastewater treatment processes. dd60cc9d5dad0dac8e24ce1d1610bc39 NULL Ifeyinwa Charlotte Okam Ifeyinwa Charlotte Okam true true 2018-08-02 "With the ever-increasing price of oil and increasingly stringent environmental regulations, effective treatment of oily wastewater has become very important. Industry currently seeks to find cost-effective solutions to meeting discharge limits by integration of oil recovery units with biological treatment. Two integrated processes were investigated so as to minimize the cost of treatment; (1) integration of a horizontal flow separator and an Immobilized Cell Bioreactor (ICB), and (2) integration of a Corrugated Plate Interceptor (CPI) and an ICB. Theoretical models of each process were developed to investigate and compare the factors that affect oil recovery and the integrated process. These models were used to generate oil droplet size distributions, size and predict the performance of the separators, size the bioreactor, and estimate the cost of the integrated process. Experimental work was undertaken to investigate aeration in a laboratory-scale model of an ICB using support particles (Pall rings) of various sizes (16 mm, 25 mm, 38 mm, and 50 mm). For the first process reducing the horizontal flow velocities best improved the separation efficiency and hence overall cost of treatment. A 33% change in droplet size resulted in an increase in separator efficiency of 55%, whilst a 33% change in horizontal velocity resulted in an increase of 68%. For the second process the effect of number of plates and plate dimensions, was investigated. For a 25% increase in design variable, the number of plates increased separator volume by 2%, plate length by 43% and plate width by 17%. Increasing the number of plates to improve interceptor efficiency resulted in the most cost-effective overall process. The experimental analysis found that an intermediate size of support particle (1&frac12;") resulted in the best volumetric mass transfer coefficient (kLa). Aeration rate in the ICB column was varied between 9 and 56 ml/s. Using 38 mm Pall rings, increased from 0.0030 to 0.0097 s-1; using 50 mm Pall rings, kLa increased from 0.0015 to 0.0058 s-1 This work concludes that enhancing oil recovery is a matter of separator design, rather than manipulation of wastewater characteristics as achieved by the use of chemicals. Effective aeration, and therefore size, of an ICB is dependent on the characteristics of the support particles used. The solution to cost-effective integration lies in the proper design of the units involved." E-Thesis Chemical engineering.;Environmental engineering. 31 12 2008 2008-12-31 COLLEGE NANME Engineering COLLEGE CODE Swansea University Master of Philosophy M.Phil 2018-08-16T14:39:02.9105634 2018-08-02T16:24:30.4765951 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Ifeyinwa Charlotte Okam NULL 1 0042786-02082018162521.pdf 10807562.pdf 2018-08-02T16:25:21.8170000 Output 14120827 application/pdf E-Thesis true 2018-08-02T16:25:21.8170000 false
title Investigation of oily wastewater treatment processes.
spellingShingle Investigation of oily wastewater treatment processes.
Ifeyinwa Charlotte Okam
title_short Investigation of oily wastewater treatment processes.
title_full Investigation of oily wastewater treatment processes.
title_fullStr Investigation of oily wastewater treatment processes.
title_full_unstemmed Investigation of oily wastewater treatment processes.
title_sort Investigation of oily wastewater treatment processes.
author_id_str_mv dd60cc9d5dad0dac8e24ce1d1610bc39
author_id_fullname_str_mv dd60cc9d5dad0dac8e24ce1d1610bc39_***_Ifeyinwa Charlotte Okam
author Ifeyinwa Charlotte Okam
author2 Ifeyinwa Charlotte Okam
format E-Thesis
publishDate 2008
institution Swansea University
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description "With the ever-increasing price of oil and increasingly stringent environmental regulations, effective treatment of oily wastewater has become very important. Industry currently seeks to find cost-effective solutions to meeting discharge limits by integration of oil recovery units with biological treatment. Two integrated processes were investigated so as to minimize the cost of treatment; (1) integration of a horizontal flow separator and an Immobilized Cell Bioreactor (ICB), and (2) integration of a Corrugated Plate Interceptor (CPI) and an ICB. Theoretical models of each process were developed to investigate and compare the factors that affect oil recovery and the integrated process. These models were used to generate oil droplet size distributions, size and predict the performance of the separators, size the bioreactor, and estimate the cost of the integrated process. Experimental work was undertaken to investigate aeration in a laboratory-scale model of an ICB using support particles (Pall rings) of various sizes (16 mm, 25 mm, 38 mm, and 50 mm). For the first process reducing the horizontal flow velocities best improved the separation efficiency and hence overall cost of treatment. A 33% change in droplet size resulted in an increase in separator efficiency of 55%, whilst a 33% change in horizontal velocity resulted in an increase of 68%. For the second process the effect of number of plates and plate dimensions, was investigated. For a 25% increase in design variable, the number of plates increased separator volume by 2%, plate length by 43% and plate width by 17%. Increasing the number of plates to improve interceptor efficiency resulted in the most cost-effective overall process. The experimental analysis found that an intermediate size of support particle (1&frac12;") resulted in the best volumetric mass transfer coefficient (kLa). Aeration rate in the ICB column was varied between 9 and 56 ml/s. Using 38 mm Pall rings, increased from 0.0030 to 0.0097 s-1; using 50 mm Pall rings, kLa increased from 0.0015 to 0.0058 s-1 This work concludes that enhancing oil recovery is a matter of separator design, rather than manipulation of wastewater characteristics as achieved by the use of chemicals. Effective aeration, and therefore size, of an ICB is dependent on the characteristics of the support particles used. The solution to cost-effective integration lies in the proper design of the units involved."
published_date 2008-12-31T03:53:39Z
_version_ 1763752667110178816
score 11.01628

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