Cover Image

Aerated blast furnace slag filters for enhanced nitrogen and phosphorus removal from small wastewater treatment plants

Rock filters (RF) are a promising alternative technology for natural wastewater treatment for upgrading WSP effluent. However, the application of RF in the removal of eutrophic nutrients, nitrogen and phosphorus, is very limited. Accordingly, the overall objective of this study was to develop a l...

Full description

Saved in:
Bibliographic Details
Main Author: Hamdan, Rafidah
Format: Thesis
Language:English
Published: 2010
Subjects:
TD Environmental technology. Sanitary engineering
TD511-780 Sewage collection and disposal systems. Sewerage
Online Access:http://eprints.uthm.edu.my/3685/1/24p%20RAFIDAH%20HAMDAN.pdf
http://eprints.uthm.edu.my/3685/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.uthm.eprints.3685
record_format eprints
spelling my.uthm.eprints.36852022-02-03T01:58:53Z http://eprints.uthm.edu.my/3685/ Aerated blast furnace slag filters for enhanced nitrogen and phosphorus removal from small wastewater treatment plants Hamdan, Rafidah TD Environmental technology. Sanitary engineering TD511-780 Sewage collection and disposal systems. Sewerage Rock filters (RF) are a promising alternative technology for natural wastewater treatment for upgrading WSP effluent. However, the application of RF in the removal of eutrophic nutrients, nitrogen and phosphorus, is very limited. Accordingly, the overall objective of this study was to develop a lowcost RF system for the purpose of enhanced nutrient removal from WSP effluents, which would be able to produce effluents which comply with the requirements of the EU Urban Waste Water Treatment Directive (UWWTD) (911271lEEC) and suitable for small communities. Therefore, a combination system comprising a primary facultative pond and an aerated rock filter (ARF) system-either vertically or horizontally loaded-was investigated at the University of Leeds' experimental station at Esholt Wastewater Treatment Works, Bradford, UK. Blast furnace slag (BFS) and limestone were selected for use in the ARF system owing to their high potential for P removal and their low cost. This study involved three major qperiments: (1) a comparison of aerated vertical-flow and horizontal-flow limestone filters for nitrogen removal; (2) a comparison of aerated limestone + blast furnace slag (BFS) filter and aerated BFS filters for nitrogen and phosphorus removal; and (3) a comparison of vertical-flow and horizontal-flow BFS filters for nitrogen and phosphorus removal. The vertical upward-flow ARF system was found to be superior to the horizontal-flow ARF system in terms of nitrogen removal, mostly thiough bacterial nitrification processes in both the aerated limestone and BFS filter studies. The BFS filter medium (whieh is low-cost) showed a much higher potential in removing phosphortls from pond effluent than the limestone medium. As a result, the combination of a vertical upward-flow ARF system and an economical and effective P-removal filter medium, such as BFS, was found to be an ideal optionfor the total nutrient removal of both nitrogen and phosphorus from wastewater. In parallel with these experiments, studies on the aerated BFS filter effective life and major in-filter phosphorus removal pathways were carried out. From the standard batch experiments of Pmax adsorption capacity of BFS, as well as six-month data collection of daily average P-removal, it was found that the effective life of the aerated BFS filter was 6.5 years. Scanning electron microscopy and X-ray diffraction spectrometric analyses on the surface of BFS, particulates and sediment samples revealed that the apparent mechanisms of P-removal in the filter are adsorption on the amorphous oxide phase of the BFS surface and precipitation within the filter. 2010-09 Thesis NonPeerReviewed text en http://eprints.uthm.edu.my/3685/1/24p%20RAFIDAH%20HAMDAN.pdf Hamdan, Rafidah (2010) Aerated blast furnace slag filters for enhanced nitrogen and phosphorus removal from small wastewater treatment plants. Doctoral thesis, University of Leeds.
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
language English
topic TD Environmental technology. Sanitary engineering
TD511-780 Sewage collection and disposal systems. Sewerage
spellingShingle TD Environmental technology. Sanitary engineering
TD511-780 Sewage collection and disposal systems. Sewerage
Hamdan, Rafidah
Aerated blast furnace slag filters for enhanced nitrogen and phosphorus removal from small wastewater treatment plants
description Rock filters (RF) are a promising alternative technology for natural wastewater treatment for upgrading WSP effluent. However, the application of RF in the removal of eutrophic nutrients, nitrogen and phosphorus, is very limited. Accordingly, the overall objective of this study was to develop a lowcost RF system for the purpose of enhanced nutrient removal from WSP effluents, which would be able to produce effluents which comply with the requirements of the EU Urban Waste Water Treatment Directive (UWWTD) (911271lEEC) and suitable for small communities. Therefore, a combination system comprising a primary facultative pond and an aerated rock filter (ARF) system-either vertically or horizontally loaded-was investigated at the University of Leeds' experimental station at Esholt Wastewater Treatment Works, Bradford, UK. Blast furnace slag (BFS) and limestone were selected for use in the ARF system owing to their high potential for P removal and their low cost. This study involved three major qperiments: (1) a comparison of aerated vertical-flow and horizontal-flow limestone filters for nitrogen removal; (2) a comparison of aerated limestone + blast furnace slag (BFS) filter and aerated BFS filters for nitrogen and phosphorus removal; and (3) a comparison of vertical-flow and horizontal-flow BFS filters for nitrogen and phosphorus removal. The vertical upward-flow ARF system was found to be superior to the horizontal-flow ARF system in terms of nitrogen removal, mostly thiough bacterial nitrification processes in both the aerated limestone and BFS filter studies. The BFS filter medium (whieh is low-cost) showed a much higher potential in removing phosphortls from pond effluent than the limestone medium. As a result, the combination of a vertical upward-flow ARF system and an economical and effective P-removal filter medium, such as BFS, was found to be an ideal optionfor the total nutrient removal of both nitrogen and phosphorus from wastewater. In parallel with these experiments, studies on the aerated BFS filter effective life and major in-filter phosphorus removal pathways were carried out. From the standard batch experiments of Pmax adsorption capacity of BFS, as well as six-month data collection of daily average P-removal, it was found that the effective life of the aerated BFS filter was 6.5 years. Scanning electron microscopy and X-ray diffraction spectrometric analyses on the surface of BFS, particulates and sediment samples revealed that the apparent mechanisms of P-removal in the filter are adsorption on the amorphous oxide phase of the BFS surface and precipitation within the filter.
format Thesis
author Hamdan, Rafidah
author_facet Hamdan, Rafidah
author_sort Hamdan, Rafidah
title Aerated blast furnace slag filters for enhanced nitrogen and phosphorus removal from small wastewater treatment plants
title_short Aerated blast furnace slag filters for enhanced nitrogen and phosphorus removal from small wastewater treatment plants
title_full Aerated blast furnace slag filters for enhanced nitrogen and phosphorus removal from small wastewater treatment plants
title_fullStr Aerated blast furnace slag filters for enhanced nitrogen and phosphorus removal from small wastewater treatment plants
title_full_unstemmed Aerated blast furnace slag filters for enhanced nitrogen and phosphorus removal from small wastewater treatment plants
title_sort aerated blast furnace slag filters for enhanced nitrogen and phosphorus removal from small wastewater treatment plants
publishDate 2010
url http://eprints.uthm.edu.my/3685/1/24p%20RAFIDAH%20HAMDAN.pdf
http://eprints.uthm.edu.my/3685/
_version_ 1738581155852058624
score 13.211869

Similar Items