Removal of heavy metals from artificially spiked wastewater through biologically assisted sulphide precipitation process / Nik Nuraini Azhari

Biological treatment of wastewater containing heavy metals offers an alternative to current conventional methods which still come out with some drawbacks. This biological treatment was able to reduce heavy metal and sulphide concentrations in both industrial and municipal wastewater simultaneously....

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Main Author:	Azhari, Nik Nuraini
Format:	Thesis
Language:	English
Published:	2012
Subjects:	Water purification Water treatment and conditioning Saline water conversion
Online Access:	https://ir.uitm.edu.my/id/eprint/41611/6/41611.pdf
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id	my-uitm-ir.41611
record_format	uketd_dc
spelling	my-uitm-ir.416112023-07-21T01:33:38Z Removal of heavy metals from artificially spiked wastewater through biologically assisted sulphide precipitation process / Nik Nuraini Azhari 2012 Azhari, Nik Nuraini Water purification. Water treatment and conditioning. Saline water conversion Biological treatment of wastewater containing heavy metals offers an alternative to current conventional methods which still come out with some drawbacks. This biological treatment was able to reduce heavy metal and sulphide concentrations in both industrial and municipal wastewater simultaneously. The purpose of this study is to determine the rate of nickel and zinc removal through biologically assisted sulphide precipitation and to evaluate the effectiveness of the biologically assisted sulphide precipitation process in removing of nickel and zinc under different concentrations. The raw municipal wastewater for laboratory work was taken by grab sampling method from the inlet of Mawar College Wastewater Treatment Plant, UiTM Shah Alam (Mawar College-WTP) and IWK Wastewater Treatment Plant, Section 7, Shah Alam (IWK-WTP). Experiment was conducted in a single 1 litre of conical flask operated for 14 days. Six sets of batch reactors were designed, which are three sets for Nickel-sulphide precipitation and another three sets for Zinc-sulphide precipitation. For each set, three conical flasks were used; one as the control and the other two as precipitation reactors (duplicate). In stage I, municipal wastewater containing sulphate was left under anaerobic condition for eight days for the production of biological sulphide. In stage II, the ability of biologically produced sulphide to precipitate out nickel or zinc from the wastewater spiked under three different concentrations of nickel or zinc (lOmg/L, 15mg/L and 20mg/L) was evaluated. The results showed that high percentages of sulphate reduction were achieved in IWK-WTP non-sterilized samples (98.06% to 99.19%) compared to Mawar College-WTP non-sterilized samples (6.47% to 25.31%). The median for the overall percentage removal of nickel in sterilized and non-sterilized samples were 7.21% and 41.81% respectively. The median for the overall percentage removal of zinc in sterilized and non-sterilized samples were 68.49% and 85.28% respectively. Results from this study found that, overall percentage removal of zinc in non-sterilized samples was good compared to removal of nickel in non-sterilized samples. This is due to production of more sulphide in wastewater used for Zinc-sulphide precipitation process. 2012 Thesis https://ir.uitm.edu.my/id/eprint/41611/ https://ir.uitm.edu.my/id/eprint/41611/6/41611.pdf text en public masters Universiti Teknologi MARA (UiTM) Faculty of Civil Engineering Abdul Talib, Suhaimi
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Abdul Talib, Suhaimi
topic	Water purification Water treatment and conditioning Saline water conversion
spellingShingle	Water purification Water treatment and conditioning Saline water conversion Azhari, Nik Nuraini Removal of heavy metals from artificially spiked wastewater through biologically assisted sulphide precipitation process / Nik Nuraini Azhari
description	Biological treatment of wastewater containing heavy metals offers an alternative to current conventional methods which still come out with some drawbacks. This biological treatment was able to reduce heavy metal and sulphide concentrations in both industrial and municipal wastewater simultaneously. The purpose of this study is to determine the rate of nickel and zinc removal through biologically assisted sulphide precipitation and to evaluate the effectiveness of the biologically assisted sulphide precipitation process in removing of nickel and zinc under different concentrations. The raw municipal wastewater for laboratory work was taken by grab sampling method from the inlet of Mawar College Wastewater Treatment Plant, UiTM Shah Alam (Mawar College-WTP) and IWK Wastewater Treatment Plant, Section 7, Shah Alam (IWK-WTP). Experiment was conducted in a single 1 litre of conical flask operated for 14 days. Six sets of batch reactors were designed, which are three sets for Nickel-sulphide precipitation and another three sets for Zinc-sulphide precipitation. For each set, three conical flasks were used; one as the control and the other two as precipitation reactors (duplicate). In stage I, municipal wastewater containing sulphate was left under anaerobic condition for eight days for the production of biological sulphide. In stage II, the ability of biologically produced sulphide to precipitate out nickel or zinc from the wastewater spiked under three different concentrations of nickel or zinc (lOmg/L, 15mg/L and 20mg/L) was evaluated. The results showed that high percentages of sulphate reduction were achieved in IWK-WTP non-sterilized samples (98.06% to 99.19%) compared to Mawar College-WTP non-sterilized samples (6.47% to 25.31%). The median for the overall percentage removal of nickel in sterilized and non-sterilized samples were 7.21% and 41.81% respectively. The median for the overall percentage removal of zinc in sterilized and non-sterilized samples were 68.49% and 85.28% respectively. Results from this study found that, overall percentage removal of zinc in non-sterilized samples was good compared to removal of nickel in non-sterilized samples. This is due to production of more sulphide in wastewater used for Zinc-sulphide precipitation process.
format	Thesis
qualification_level	Master's degree
author	Azhari, Nik Nuraini
author_facet	Azhari, Nik Nuraini
author_sort	Azhari, Nik Nuraini
title	Removal of heavy metals from artificially spiked wastewater through biologically assisted sulphide precipitation process / Nik Nuraini Azhari
title_short	Removal of heavy metals from artificially spiked wastewater through biologically assisted sulphide precipitation process / Nik Nuraini Azhari
title_full	Removal of heavy metals from artificially spiked wastewater through biologically assisted sulphide precipitation process / Nik Nuraini Azhari
title_fullStr	Removal of heavy metals from artificially spiked wastewater through biologically assisted sulphide precipitation process / Nik Nuraini Azhari
title_full_unstemmed	Removal of heavy metals from artificially spiked wastewater through biologically assisted sulphide precipitation process / Nik Nuraini Azhari
title_sort	removal of heavy metals from artificially spiked wastewater through biologically assisted sulphide precipitation process / nik nuraini azhari
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	Faculty of Civil Engineering
publishDate	2012
url	https://ir.uitm.edu.my/id/eprint/41611/6/41611.pdf
_version_	1783734649865895936

Removal of heavy metals from artificially spiked wastewater through biologically assisted sulphide precipitation process / Nik Nuraini Azhari

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