Cover Image

Aquaculture wastewater treatment by ozonation: Effect of process parameters and degradation kinetic studies

The aquaculture industry is overgrowing to meet the demand of the rising population. This growth promotes fish farming production, which occurs intensively with high cultivation densities. At present, most aquaculture practices in Malaysia do not adopt proper wastewater treatment due to lack of awar...

Full description

Saved in:
Bibliographic Details
Main Author: Nur Zafirah Mahyun
Format: UMK Etheses
Published: 2022
Online Access:http://discol.umk.edu.my/id/eprint/13445/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.umk.eprints.13445
record_format eprints
spelling my.umk.eprints.134452023-07-03T02:49:16Z http://discol.umk.edu.my/id/eprint/13445/ Aquaculture wastewater treatment by ozonation: Effect of process parameters and degradation kinetic studies Nur Zafirah Mahyun The aquaculture industry is overgrowing to meet the demand of the rising population. This growth promotes fish farming production, which occurs intensively with high cultivation densities. At present, most aquaculture practices in Malaysia do not adopt proper wastewater treatment due to lack of awareness of the environment and the high cost of water treatment. The discharge of untreated aquaculture wastewater contributes to water pollution and affect water sources. This study aims to investigate the efficacy of the ozonation technique to degrade different types of pollutants and also to assess its use as a potential treatment in aquaculture wastewater. The ozonation process was carried out in stirred tank reactor where the gaseous ozone was continuously fed at a constant flowrate to the reactor. The performances of the ozonation process were conducted at different parameters which were concentration of ozone (1.0 - 2.0 mg/L) and pH value (2 - 12). The implementation of ozonation in aquaculture wastewater was to observe the performance of ozone in removal efficiency towards pollutants. The efficiency of ozonation treatment was firstly determined in terms of the degradation of humic acid, ammonia, and E. coli. From this study, it was found that the highest removal for HA was 98% and the removal for E.coli was 99% at pH 7 with 2.0 mg/L of ozone concentration. The highest removal for ammonia was 42% at pH 10 and 2.0 mg/L of ozone concentration. The ozonation treatment was then further applied in aquaculture wastewater to observe the quality of wastewater and the degradation efficiency of ammonia, chemical oxygen demand (COD), and bacterial inhibition before and after treatment. The results exhibited the advantages of ozonation as a treatment which improved the quality of wastewater and enhanced the biodegradability of the bacterial activity up to 99 % and COD removal efficiency of 98 % at pH 7, and 2.0 mg/L of ozone concentration. To get a systematic understanding of the degradation process affected by ozonation treatment, a kinetic study of the targeted pollutants was investigated by applying first-order and second-order reaction models. Furthermore, the kinetic and mass transfer equation was implemented to develop a dynamic model in a semi-batch system of aquaculture wastewater treatment. The mass-transfer coefficient and kinetic parameters that represent the behaviour of the process were estimated and the dynamic model was successfully validated using the experimental data. The highest rate reaction in degradation of COD was at 2.0 mg/L of ozone concentration with the value of kcod is 0.0074 min'. Meanwhile, the highest rate reaction in microbial degradation was at 1.0 mg/L of ozone concentration with the value of kmic is 0.0218 min These findings suggest that the ozonation process can be effectively used in wastewater treatment to improve the biodegradability of recalcitrant organic compounds. The information gathered can be used in future studies to integrate this ozonation method with other treatments to improve water recovery and reuse the system of aquaculture wastewater treatment. 2022 UMK Etheses NonPeerReviewed Nur Zafirah Mahyun (2022) Aquaculture wastewater treatment by ozonation: Effect of process parameters and degradation kinetic studies. Masters thesis, Universiti Malaysia Kelantan.
institution Universiti Malaysia Kelantan
building Perpustakaan Universiti Malaysia Kelantan
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Kelantan
content_source UMK Institutional Repository
url_provider http://umkeprints.umk.edu.my/
description The aquaculture industry is overgrowing to meet the demand of the rising population. This growth promotes fish farming production, which occurs intensively with high cultivation densities. At present, most aquaculture practices in Malaysia do not adopt proper wastewater treatment due to lack of awareness of the environment and the high cost of water treatment. The discharge of untreated aquaculture wastewater contributes to water pollution and affect water sources. This study aims to investigate the efficacy of the ozonation technique to degrade different types of pollutants and also to assess its use as a potential treatment in aquaculture wastewater. The ozonation process was carried out in stirred tank reactor where the gaseous ozone was continuously fed at a constant flowrate to the reactor. The performances of the ozonation process were conducted at different parameters which were concentration of ozone (1.0 - 2.0 mg/L) and pH value (2 - 12). The implementation of ozonation in aquaculture wastewater was to observe the performance of ozone in removal efficiency towards pollutants. The efficiency of ozonation treatment was firstly determined in terms of the degradation of humic acid, ammonia, and E. coli. From this study, it was found that the highest removal for HA was 98% and the removal for E.coli was 99% at pH 7 with 2.0 mg/L of ozone concentration. The highest removal for ammonia was 42% at pH 10 and 2.0 mg/L of ozone concentration. The ozonation treatment was then further applied in aquaculture wastewater to observe the quality of wastewater and the degradation efficiency of ammonia, chemical oxygen demand (COD), and bacterial inhibition before and after treatment. The results exhibited the advantages of ozonation as a treatment which improved the quality of wastewater and enhanced the biodegradability of the bacterial activity up to 99 % and COD removal efficiency of 98 % at pH 7, and 2.0 mg/L of ozone concentration. To get a systematic understanding of the degradation process affected by ozonation treatment, a kinetic study of the targeted pollutants was investigated by applying first-order and second-order reaction models. Furthermore, the kinetic and mass transfer equation was implemented to develop a dynamic model in a semi-batch system of aquaculture wastewater treatment. The mass-transfer coefficient and kinetic parameters that represent the behaviour of the process were estimated and the dynamic model was successfully validated using the experimental data. The highest rate reaction in degradation of COD was at 2.0 mg/L of ozone concentration with the value of kcod is 0.0074 min'. Meanwhile, the highest rate reaction in microbial degradation was at 1.0 mg/L of ozone concentration with the value of kmic is 0.0218 min These findings suggest that the ozonation process can be effectively used in wastewater treatment to improve the biodegradability of recalcitrant organic compounds. The information gathered can be used in future studies to integrate this ozonation method with other treatments to improve water recovery and reuse the system of aquaculture wastewater treatment.
format UMK Etheses
author Nur Zafirah Mahyun
spellingShingle Nur Zafirah Mahyun
Aquaculture wastewater treatment by ozonation: Effect of process parameters and degradation kinetic studies
author_facet Nur Zafirah Mahyun
author_sort Nur Zafirah Mahyun
title Aquaculture wastewater treatment by ozonation: Effect of process parameters and degradation kinetic studies
title_short Aquaculture wastewater treatment by ozonation: Effect of process parameters and degradation kinetic studies
title_full Aquaculture wastewater treatment by ozonation: Effect of process parameters and degradation kinetic studies
title_fullStr Aquaculture wastewater treatment by ozonation: Effect of process parameters and degradation kinetic studies
title_full_unstemmed Aquaculture wastewater treatment by ozonation: Effect of process parameters and degradation kinetic studies
title_sort aquaculture wastewater treatment by ozonation: effect of process parameters and degradation kinetic studies
publishDate 2022
url http://discol.umk.edu.my/id/eprint/13445/
_version_ 1770556692471218176
score 13.211869

Similar Items