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Phyt-dewatering of sewage sludge
Over-population has resulted in an alarming rise in waste water production. This lead to an increased amount of sludge and this can cause serious environmental problems and health risks. This is because it carries different types of pollutants. In Egypt, some sludge dewatering techniques are depe...
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AUC Knowledge Fountain
2019
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| _version_ | 1867613410637643776 |
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| access_status_str | Open Access |
| author | Ahmed, Amira Galal |
| author_browse | Ahmed, Amira Galal |
| author_facet | Ahmed, Amira Galal |
| author_sort | Ahmed, Amira Galal |
| collection | Thesis |
| dc_rights_str_mv | The author retains all rights with regard to copyright. The author certifies that written permission from the owner(s) of third-party copyrighted matter included in the thesis, dissertation, paper, or record of study has been obtained. The author further certifies that IRB approval has been obtained for this thesis, or that IRB approval is not necessary for this thesis. Insofar as this thesis, dissertation, paper, or record of study is an educational record as defined in the Family Educational Rights and Privacy Act (FERPA) (20 USC 1232g), the author has granted consent to disclosure of it to anyone who requests a copy. |
| description | Over-population has resulted in an alarming rise in waste water production. This lead to an increased amount of sludge and this can cause serious environmental problems and health risks. This is because it carries different types of pollutants. In Egypt, some sludge dewatering techniques are depending on natural evaporation (ex-ample, drying bed). However, this need very wide land areas. The other techniques are depending on mechanical ways (example, belt press). However, this is considered a high cost technology. This research study investigated the potential efficacy of using water plants in expediting the process of sludge dewatering in drying bed. The study also proposed using aquatic plants for drying bed to improve the efficiency of both existing and newly constructed wastewater treatment plants (WWTPs) while also considering the sludge quality and cost-effective technologies and methods. The selection criteria of the plants used in the study, mainly water hyacinth (Eichhornia crassipes), common reed (phragmites), niseila (Papspalidium geminatum), and samar (Cryperus alopecuroid-es), was based on high water absorption capacity and resistance to a contaminated aquatic environment. The experiments were conducted through four phases: Phase One tested the ability of the four plants to survive in a sludge environment while Phase Two investigated which of the four plants could absorb the most water from the sludge (Phyto-dewatering); the third phase tested the surface area density of the water hyacinth, the successful plant in achieving optimum sludge evaporation. In Phase Four the design model with specific criteria (based on the first three experiments) was compared with a conventional one to test water evaporation and sludge quality. A chemical analysis of the produced sludge was conducted after each of the four phases. The results indicated that all of the selected plants were able to survive in the target environment. It was also found that water hyacinth demonstrates superior ability to consume and evaporate sludge water. Water hyacinth density is shown to be 100% effective for surface area coverage. Furthermore, results demonstrated that the design model outperformed the conventional model by 70% the quantity of evaporated sludge in half the time. It was found also that the dewatered sludge using phyto-technology more save to deal with compared to sludge dewatered using ordinary drying beds because the ability of water hyacinth to remove the harmful microbial agents from sludge such as total and fecal coliform, Salmonella, Shigella and parasites. |
| format | Thesis |
| id | oai:fount.aucegypt.edu:etds-1533 |
| institution | American University in Cairo (Egypt) |
| last_indexed | 2026-06-10T12:35:42.290Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from AUC Knowledge Fountain — bepress |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | AUC Knowledge Fountain |
| publisherStr | AUC Knowledge Fountain |
| record_format | dspace |
| source_str | AUC Knowledge Fountain — bepress |
| spelling | oai:fount.aucegypt.edu:etds-1533 Phyt-dewatering of sewage sludge Ahmed, Amira Galal Over-population has resulted in an alarming rise in waste water production. This lead to an increased amount of sludge and this can cause serious environmental problems and health risks. This is because it carries different types of pollutants. In Egypt, some sludge dewatering techniques are depending on natural evaporation (ex-ample, drying bed). However, this need very wide land areas. The other techniques are depending on mechanical ways (example, belt press). However, this is considered a high cost technology. This research study investigated the potential efficacy of using water plants in expediting the process of sludge dewatering in drying bed. The study also proposed using aquatic plants for drying bed to improve the efficiency of both existing and newly constructed wastewater treatment plants (WWTPs) while also considering the sludge quality and cost-effective technologies and methods. The selection criteria of the plants used in the study, mainly water hyacinth (Eichhornia crassipes), common reed (phragmites), niseila (Papspalidium geminatum), and samar (Cryperus alopecuroid-es), was based on high water absorption capacity and resistance to a contaminated aquatic environment. The experiments were conducted through four phases: Phase One tested the ability of the four plants to survive in a sludge environment while Phase Two investigated which of the four plants could absorb the most water from the sludge (Phyto-dewatering); the third phase tested the surface area density of the water hyacinth, the successful plant in achieving optimum sludge evaporation. In Phase Four the design model with specific criteria (based on the first three experiments) was compared with a conventional one to test water evaporation and sludge quality. A chemical analysis of the produced sludge was conducted after each of the four phases. The results indicated that all of the selected plants were able to survive in the target environment. It was also found that water hyacinth demonstrates superior ability to consume and evaporate sludge water. Water hyacinth density is shown to be 100% effective for surface area coverage. Furthermore, results demonstrated that the design model outperformed the conventional model by 70% the quantity of evaporated sludge in half the time. It was found also that the dewatered sludge using phyto-technology more save to deal with compared to sludge dewatered using ordinary drying beds because the ability of water hyacinth to remove the harmful microbial agents from sludge such as total and fecal coliform, Salmonella, Shigella and parasites. 2019-02-01T08:00:00Z thesis application/pdf https://fount.aucegypt.edu/etds/534 https://fount.aucegypt.edu/context/etds/article/1533/viewcontent/Pyto__20Dewatering_20of_20Sewage_20Sludge_20_20__20_20_28Recovered_29.pdf The author retains all rights with regard to copyright. The author certifies that written permission from the owner(s) of third-party copyrighted matter included in the thesis, dissertation, paper, or record of study has been obtained. The author further certifies that IRB approval has been obtained for this thesis, or that IRB approval is not necessary for this thesis. Insofar as this thesis, dissertation, paper, or record of study is an educational record as defined in the Family Educational Rights and Privacy Act (FERPA) (20 USC 1232g), the author has granted consent to disclosure of it to anyone who requests a copy. Theses and Dissertations AUC Knowledge Fountain Sludge Dewatering NA NA |
| spellingShingle | Sludge Dewatering NA NA Ahmed, Amira Galal Phyt-dewatering of sewage sludge |
| title | Phyt-dewatering of sewage sludge |
| title_full | Phyt-dewatering of sewage sludge |
| title_fullStr | Phyt-dewatering of sewage sludge |
| title_full_unstemmed | Phyt-dewatering of sewage sludge |
| title_short | Phyt-dewatering of sewage sludge |
| title_sort | phyt dewatering of sewage sludge |
| topic | Sludge Dewatering NA NA |
| url | https://fount.aucegypt.edu/etds/534 https://fount.aucegypt.edu/context/etds/article/1533/viewcontent/Pyto__20Dewatering_20of_20Sewage_20Sludge_20_20__20_20_28Recovered_29.pdf |
| work_keys_str_mv | AT ahmedamiragalal phytdewateringofsewagesludge |