Cover Image

Micro-Algae Removal In Domestic Wastewater Using Aspergillus Flavus Soft Pellets As A Bio-Coagulant

Nuisance due to algae problems will become more widespread and severe as our growing urban populations and industries continue to discharge their wastes into streams. Some of the problems are odour and taste, the clogging of filters, growths in pipes, cooling towers and on reservoir walls, surface w...

Full description

Saved in:
Bibliographic Details
Main Author: Rajab, Ahmad Hussein
Format: Thesis
Language:English
English
Published: 2007
Online Access:http://psasir.upm.edu.my/id/eprint/5263/1/FK_2007_53.pdf
http://psasir.upm.edu.my/id/eprint/5263/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.upm.eprints.5263
record_format eprints
spelling my.upm.eprints.52632016-11-25T04:39:17Z http://psasir.upm.edu.my/id/eprint/5263/ Micro-Algae Removal In Domestic Wastewater Using Aspergillus Flavus Soft Pellets As A Bio-Coagulant Rajab, Ahmad Hussein Nuisance due to algae problems will become more widespread and severe as our growing urban populations and industries continue to discharge their wastes into streams. Some of the problems are odour and taste, the clogging of filters, growths in pipes, cooling towers and on reservoir walls, surface water mats or blooms and toxicity. The existing chemical and physical methods used for micro-algae removal are creating undesirable effects in the water, therefore, most of the recent researches are focusing on biological removal methods due to lesser of impact on the environment and water quality and it may be a more economical alternative to some chemical and physical methods. This study used A. flavus as bio-coagulant for micro-algae removal in domestic wastewater. Jar test is used to determine the proper A. flavus dosage and retention time. It was determined that 5% (v/v) of A. flavus as optimum concentration and 12 hours as optimum retention time. At the optimum A. flavus concentration and retention time removal efficiencies were recorded as: 72.3% of micro-algae cell number, 79.5% of TSS, 78.6% of VSS, 63.5% of COD, 60% of BOD, 73.5% of nitrate, 45.1% of phosphorus, 90.6% of color, 76.1% of turbidity and pH was decreased from (7.45 – 6.9) to (7.0 – 6.5). 1.2 mm of A. flavus soft pellets size shown a high removal in comparison with 2.5mm and 4.3mm. with 1.2mm of A. flavus soft pellets size used, 71.5% of micro-algae removal, 77.9% of TSS removal, 76.1% of VSS removal, 68.6% of COD removal and 82.6% of color removal at 12 hours of retention time are recorded. The experimental results indicated that the solid capturing ability of A. flavus increased as the free surface area of A. flavus soft pellets increased. Moreover, A. flavus soft pellets capturing ability increased as retention time increased. The zeta potential result revealed that the average zeta potential of micro-algae was – 23.7 milivolt which the average zeta potential of A. flavus was + 46.1 milivolt. The charge difference between A. flavus and micro-algae may have constituted to the A. flavus ability to capture micro-algae. 2007 Thesis NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/5263/1/FK_2007_53.pdf Rajab, Ahmad Hussein (2007) Micro-Algae Removal In Domestic Wastewater Using Aspergillus Flavus Soft Pellets As A Bio-Coagulant. Masters thesis, Universiti Putra Malaysia. English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description Nuisance due to algae problems will become more widespread and severe as our growing urban populations and industries continue to discharge their wastes into streams. Some of the problems are odour and taste, the clogging of filters, growths in pipes, cooling towers and on reservoir walls, surface water mats or blooms and toxicity. The existing chemical and physical methods used for micro-algae removal are creating undesirable effects in the water, therefore, most of the recent researches are focusing on biological removal methods due to lesser of impact on the environment and water quality and it may be a more economical alternative to some chemical and physical methods. This study used A. flavus as bio-coagulant for micro-algae removal in domestic wastewater. Jar test is used to determine the proper A. flavus dosage and retention time. It was determined that 5% (v/v) of A. flavus as optimum concentration and 12 hours as optimum retention time. At the optimum A. flavus concentration and retention time removal efficiencies were recorded as: 72.3% of micro-algae cell number, 79.5% of TSS, 78.6% of VSS, 63.5% of COD, 60% of BOD, 73.5% of nitrate, 45.1% of phosphorus, 90.6% of color, 76.1% of turbidity and pH was decreased from (7.45 – 6.9) to (7.0 – 6.5). 1.2 mm of A. flavus soft pellets size shown a high removal in comparison with 2.5mm and 4.3mm. with 1.2mm of A. flavus soft pellets size used, 71.5% of micro-algae removal, 77.9% of TSS removal, 76.1% of VSS removal, 68.6% of COD removal and 82.6% of color removal at 12 hours of retention time are recorded. The experimental results indicated that the solid capturing ability of A. flavus increased as the free surface area of A. flavus soft pellets increased. Moreover, A. flavus soft pellets capturing ability increased as retention time increased. The zeta potential result revealed that the average zeta potential of micro-algae was – 23.7 milivolt which the average zeta potential of A. flavus was + 46.1 milivolt. The charge difference between A. flavus and micro-algae may have constituted to the A. flavus ability to capture micro-algae.
format Thesis
author Rajab, Ahmad Hussein
spellingShingle Rajab, Ahmad Hussein
Micro-Algae Removal In Domestic Wastewater Using Aspergillus Flavus Soft Pellets As A Bio-Coagulant
author_facet Rajab, Ahmad Hussein
author_sort Rajab, Ahmad Hussein
title Micro-Algae Removal In Domestic Wastewater Using Aspergillus Flavus Soft Pellets As A Bio-Coagulant
title_short Micro-Algae Removal In Domestic Wastewater Using Aspergillus Flavus Soft Pellets As A Bio-Coagulant
title_full Micro-Algae Removal In Domestic Wastewater Using Aspergillus Flavus Soft Pellets As A Bio-Coagulant
title_fullStr Micro-Algae Removal In Domestic Wastewater Using Aspergillus Flavus Soft Pellets As A Bio-Coagulant
title_full_unstemmed Micro-Algae Removal In Domestic Wastewater Using Aspergillus Flavus Soft Pellets As A Bio-Coagulant
title_sort micro-algae removal in domestic wastewater using aspergillus flavus soft pellets as a bio-coagulant
publishDate 2007
url http://psasir.upm.edu.my/id/eprint/5263/1/FK_2007_53.pdf
http://psasir.upm.edu.my/id/eprint/5263/
_version_ 1643823138182529024
score 13.211869

Similar Items