Domestic wastewater nutrients removal using GAC and limestone by physico-chemical treatment
The present study was conducted to investigate the removal of wastewater nutrients (ammoniacal nitrogen, NH4-N and orthophosphate, PO4-P) using limestone (LS) and granular activated carbon (GAC) by physico-chemical method. In preliminary batch experiments, optimum shaking and settling times were det...
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| Format: | Conference or Workshop Item |
| Language: | English |
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2006
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| Online Access: | http://scholars.utp.edu.my/id/eprint/1490/ http://scholars.utp.edu.my/id/eprint/1490/1/Domestic_wastewater_nutrients_removal_using_GAC_and_limestone_by_physico-chemical_treatment.pdf |
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| author | Hussain, S. Aziz, H.A. Isa, M.H. Asaari, F.A.H. Adlan, M.N. |
| author_facet | Hussain, S. Aziz, H.A. Isa, M.H. Asaari, F.A.H. Adlan, M.N. |
| author_sort | Hussain, S. |
| building | UTP Institutional Repository |
| collection | Online Access |
| description | The present study was conducted to investigate the removal of wastewater nutrients (ammoniacal nitrogen, NH4-N and orthophosphate, PO4-P) using limestone (LS) and granular activated carbon (GAC) by physico-chemical method. In preliminary batch experiments, optimum shaking and settling times were determined as 150 minutes and 120 minutes, respectively. Limestone alone was not efficient in the removal of NH4-N (12%) however it contributed to 91% removal of PO4-P. The LS-GAC mixture ratio of 25:15 removed about 58% NH4-N and 93% PO4-P. Lower initial concentration of adsorbate and increase in adsorbent dosage yielded higher removal and adsorption capacity. The equilibrium adsorption data followed Freundlich isotherm (R2 > 0.98), however it showed weak bonding. The column study showed that lower flowrate resulted in longer column saturation time. The column saturation time for NH4-N at pH 7 was much longer than pH 4 because at pH 4 ammonia was largely in ionized (NH4+) form and was removed by adsorption but at pH 7 a substantial part of it was also in the molecular (NH3) form which was subject to gradual removal by stripping. The mixture (LS-GAC) showed higher adsorption capacity of phosphate at pH 4 compared to pH 7 and pH 11. Limestone also behaved as an acid neutralizing media which increased the final effluent pH from 4 to the range of 8.24 to 8.41. It was concluded that the usage of GAC can be reduced by combining GAC with LS for the removal of NH4-N and PO4-P from wastewater, thus reducing the cost of treatment. |
| first_indexed | 2025-11-13T07:25:28Z |
| format | Conference or Workshop Item |
| id | oai:scholars.utp.edu.my:1490 |
| institution | Universiti Teknologi Petronas |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-13T07:25:28Z |
| publishDate | 2006 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:scholars.utp.edu.my:14902017-01-19T08:27:21Z http://scholars.utp.edu.my/id/eprint/1490/ Domestic wastewater nutrients removal using GAC and limestone by physico-chemical treatment Hussain, S. Aziz, H.A. Isa, M.H. Asaari, F.A.H. Adlan, M.N. TD Environmental technology. Sanitary engineering The present study was conducted to investigate the removal of wastewater nutrients (ammoniacal nitrogen, NH4-N and orthophosphate, PO4-P) using limestone (LS) and granular activated carbon (GAC) by physico-chemical method. In preliminary batch experiments, optimum shaking and settling times were determined as 150 minutes and 120 minutes, respectively. Limestone alone was not efficient in the removal of NH4-N (12%) however it contributed to 91% removal of PO4-P. The LS-GAC mixture ratio of 25:15 removed about 58% NH4-N and 93% PO4-P. Lower initial concentration of adsorbate and increase in adsorbent dosage yielded higher removal and adsorption capacity. The equilibrium adsorption data followed Freundlich isotherm (R2 > 0.98), however it showed weak bonding. The column study showed that lower flowrate resulted in longer column saturation time. The column saturation time for NH4-N at pH 7 was much longer than pH 4 because at pH 4 ammonia was largely in ionized (NH4+) form and was removed by adsorption but at pH 7 a substantial part of it was also in the molecular (NH3) form which was subject to gradual removal by stripping. The mixture (LS-GAC) showed higher adsorption capacity of phosphate at pH 4 compared to pH 7 and pH 11. Limestone also behaved as an acid neutralizing media which increased the final effluent pH from 4 to the range of 8.24 to 8.41. It was concluded that the usage of GAC can be reduced by combining GAC with LS for the removal of NH4-N and PO4-P from wastewater, thus reducing the cost of treatment. 2006-03 Conference or Workshop Item PeerReviewed application/pdf en http://scholars.utp.edu.my/id/eprint/1490/1/Domestic_wastewater_nutrients_removal_using_GAC_and_limestone_by_physico-chemical_treatment.pdf Hussain, S. and Aziz, H.A. and Isa, M.H. and Asaari, F.A.H. and Adlan, M.N. (2006) Domestic wastewater nutrients removal using GAC and limestone by physico-chemical treatment. In: AsiaWater 2006 Conference, The Malaysian Water Association, Kuala Lumpur, Malaysia, March, 2006. |
| spellingShingle | TD Environmental technology. Sanitary engineering Hussain, S. Aziz, H.A. Isa, M.H. Asaari, F.A.H. Adlan, M.N. Domestic wastewater nutrients removal using GAC and limestone by physico-chemical treatment |
| title | Domestic wastewater nutrients removal using GAC and limestone by physico-chemical treatment |
| title_full | Domestic wastewater nutrients removal using GAC and limestone by physico-chemical treatment |
| title_fullStr | Domestic wastewater nutrients removal using GAC and limestone by physico-chemical treatment |
| title_full_unstemmed | Domestic wastewater nutrients removal using GAC and limestone by physico-chemical treatment |
| title_short | Domestic wastewater nutrients removal using GAC and limestone by physico-chemical treatment |
| title_sort | domestic wastewater nutrients removal using gac and limestone by physico-chemical treatment |
| topic | TD Environmental technology. Sanitary engineering |
| url | http://scholars.utp.edu.my/id/eprint/1490/ http://scholars.utp.edu.my/id/eprint/1490/1/Domestic_wastewater_nutrients_removal_using_GAC_and_limestone_by_physico-chemical_treatment.pdf |