A Full-Scale Combined Anaerobic-Aerobic System for Treatment of Melamine Formaldehyde Wastewater

The objective of this full scale study is to determine the effectiveness of the combined two stage anaerobic-aerobic processes to treat high strength melamine formaldehyde (MF) wastewater at ambient temperature. The raw wastewater with COD concentration of between 25,000 to 50,000 ppm at normal o...

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Main Author:	Lai, Aloysius Min Yun
Format:	Thesis
Language:	English English
Published:	1999
Subjects:	Anaerobiosis - Formaldehyde - Sewage disposal plants - Case studies
Online Access:	http://psasir.upm.edu.my/id/eprint/10325/1/FK_1999_31.pdf
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id	my-upm-ir.10325
record_format	uketd_dc
spelling	my-upm-ir.103252024-03-27T00:30:16Z A Full-Scale Combined Anaerobic-Aerobic System for Treatment of Melamine Formaldehyde Wastewater 1999-08 Lai, Aloysius Min Yun The objective of this full scale study is to determine the effectiveness of the combined two stage anaerobic-aerobic processes to treat high strength melamine formaldehyde (MF) wastewater at ambient temperature. The raw wastewater with COD concentration of between 25,000 to 50,000 ppm at normal operating condition. Two stage physical/chemical treatment processes were carried out in this experiment to ensure consistent wastewater stream to be treated at the downstream anaerobic BioFil and aerobic system. The two BioFil reactors total combined volume of 70.0 m3 (35 MT each) and the Aeration Tank has a capacity of 5.0 m3 to cater for a flow rate of 15-25 Concentration of biomass was achieved through entrapment in the macrostructure of cosmo (HDPE) balls used in the BioFil reactors. Hydraulic retention time (HRT) for BioFil was controlled by centrifugal pump at 24, 18, 12 and 6 hours with corresponding organic loading of 2.4, 4.8, 9.7 and 38.8 kg COD/m3/day. Under steady state condition, the highest percentage removal achieved was COD 86.3%, BOD 87.0%, TSS 84.4% and 86.8% for VSS at HRT 24 hours. Generally the BioFil was able to stabilized at a period of 5 to 8 days when a new loading rate was applied. Accordingly, the HRT for Aeration Tank (AT) was 8, 6 and 4 hours with substrate loading of 13.9, 55.4 and 1 45.2 kg COD/m3/day. Under steady state condition in AT, the highest percentage removal of organic matter was observed at HRT 8 hours, with COD 86.2%, BOD 86.5%, 80.2% and 86.0% for TSS and VSS respectively. The cosmo balls used in the BioFil proven to be an effective carrier material which functioned as a separation device thus limiting biomass being washed out. The combined anaerobic-aerobic system is a suitable process to treat high strength wastewater. Based on this full scale study, higher efficiency of this system can be anticipated if longer HRT is allowed in the Aeration Tank. Anaerobiosis - Formaldehyde - Sewage disposal plants - Case studies 1999-08 Thesis http://psasir.upm.edu.my/id/eprint/10325/ http://psasir.upm.edu.my/id/eprint/10325/1/FK_1999_31.pdf text en public masters Universiti Putra Malaysia Anaerobiosis - Formaldehyde - Sewage disposal plants - Case studies Faculty of Engineering Idris, Azni English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
advisor	Idris, Azni
topic	Anaerobiosis - Formaldehyde - Sewage disposal plants - Case studies
spellingShingle	Anaerobiosis - Formaldehyde - Sewage disposal plants - Case studies Lai, Aloysius Min Yun A Full-Scale Combined Anaerobic-Aerobic System for Treatment of Melamine Formaldehyde Wastewater
description	The objective of this full scale study is to determine the effectiveness of the combined two stage anaerobic-aerobic processes to treat high strength melamine formaldehyde (MF) wastewater at ambient temperature. The raw wastewater with COD concentration of between 25,000 to 50,000 ppm at normal operating condition. Two stage physical/chemical treatment processes were carried out in this experiment to ensure consistent wastewater stream to be treated at the downstream anaerobic BioFil and aerobic system. The two BioFil reactors total combined volume of 70.0 m3 (35 MT each) and the Aeration Tank has a capacity of 5.0 m3 to cater for a flow rate of 15-25 Concentration of biomass was achieved through entrapment in the macrostructure of cosmo (HDPE) balls used in the BioFil reactors. Hydraulic retention time (HRT) for BioFil was controlled by centrifugal pump at 24, 18, 12 and 6 hours with corresponding organic loading of 2.4, 4.8, 9.7 and 38.8 kg COD/m3/day. Under steady state condition, the highest percentage removal achieved was COD 86.3%, BOD 87.0%, TSS 84.4% and 86.8% for VSS at HRT 24 hours. Generally the BioFil was able to stabilized at a period of 5 to 8 days when a new loading rate was applied. Accordingly, the HRT for Aeration Tank (AT) was 8, 6 and 4 hours with substrate loading of 13.9, 55.4 and 1 45.2 kg COD/m3/day. Under steady state condition in AT, the highest percentage removal of organic matter was observed at HRT 8 hours, with COD 86.2%, BOD 86.5%, 80.2% and 86.0% for TSS and VSS respectively. The cosmo balls used in the BioFil proven to be an effective carrier material which functioned as a separation device thus limiting biomass being washed out. The combined anaerobic-aerobic system is a suitable process to treat high strength wastewater. Based on this full scale study, higher efficiency of this system can be anticipated if longer HRT is allowed in the Aeration Tank.
format	Thesis
qualification_level	Master's degree
author	Lai, Aloysius Min Yun
author_facet	Lai, Aloysius Min Yun
author_sort	Lai, Aloysius Min Yun
title	A Full-Scale Combined Anaerobic-Aerobic System for Treatment of Melamine Formaldehyde Wastewater
title_short	A Full-Scale Combined Anaerobic-Aerobic System for Treatment of Melamine Formaldehyde Wastewater
title_full	A Full-Scale Combined Anaerobic-Aerobic System for Treatment of Melamine Formaldehyde Wastewater
title_fullStr	A Full-Scale Combined Anaerobic-Aerobic System for Treatment of Melamine Formaldehyde Wastewater
title_full_unstemmed	A Full-Scale Combined Anaerobic-Aerobic System for Treatment of Melamine Formaldehyde Wastewater
title_sort	full-scale combined anaerobic-aerobic system for treatment of melamine formaldehyde wastewater
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Engineering
publishDate	1999
url	http://psasir.upm.edu.my/id/eprint/10325/1/FK_1999_31.pdf
_version_	1804888536127635456

A Full-Scale Combined Anaerobic-Aerobic System for Treatment of Melamine Formaldehyde Wastewater

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