Application of forward osmosis (FO) under ultrasonication on sludge thickening of waste activated sludge
Forward osmosis (FO) is an emerging process for dewatering solid–liquid stream which has the potential to be innovative and sustainable. However, the applications have still been hindered by low water flux and membrane fouling when activated sludge is used as the feed solution due to bound water fro...
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2023
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| Truy cập trực tuyến: | https://scholar.dlu.edu.vn/handle/123456789/3021 https://doi.org/10.2166/wst.2015.341 |
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oai:scholar.dlu.edu.vn:123456789-30212023-09-28T06:29:51Z Application of forward osmosis (FO) under ultrasonication on sludge thickening of waste activated sludge Nguyen Cong Nguyen Nguyen Thi Hau Chen, Shiao-Shing Nguyen, Nhat Thien Li, Chi-Wang Forward osmosis (FO) is an emerging process for dewatering solid–liquid stream which has the potential to be innovative and sustainable. However, the applications have still been hindered by low water flux and membrane fouling when activated sludge is used as the feed solution due to bound water from microbial cells. Hence, a novel strategy was designed to increase sludge thickening and reduce membrane fouling in the FO process under ultrasonic condition. The results from the ultrasound/FO hybrid system showed that the sludge concentration reached up to 20,400 and 28,400 mg/L from initial sludge concentrations of 3000 and 8000 mg/L with frequency of 40 kHz after 22 hours, while the system without ultrasound had to spend 26 hours to achieve the same sludge concentration. This identifies that the presence of ultrasound strongly affected sludge structure as well as sludge thickening of the FO process. Furthermore, the ultrasound/FO hybrid system could achieve NH4+-N removal efficiency of 96%, PO43−-P of 98% and dissolved organic carbon (DOC) of 99%. The overall performance demonstrates that the proposed ultrasound/FO system using seawater as a draw solution is promising for sludge thickening application. 2023-09-28T06:29:47Z 2023-09-28T06:29:47Z 2015-10-01 Journal article Bài báo đăng trên tạp chí thuộc ISI, bao gồm book chapter 0273-1223 https://scholar.dlu.edu.vn/handle/123456789/3021 10.2166/wst.2015.341 https://doi.org/10.2166/wst.2015.341 en |
| institution |
Thư viện Trường Đại học Đà Lạt |
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Thư viện số |
| language |
English |
| description |
Forward osmosis (FO) is an emerging process for dewatering solid–liquid stream which has the potential to be innovative and sustainable. However, the applications have still been hindered by low water flux and membrane fouling when activated sludge is used as the feed solution due to bound water from microbial cells. Hence, a novel strategy was designed to increase sludge thickening and reduce membrane fouling in the FO process under ultrasonic condition. The results from the ultrasound/FO hybrid system showed that the sludge concentration reached up to 20,400 and 28,400 mg/L from initial sludge concentrations of 3000 and 8000 mg/L with frequency of 40 kHz after 22 hours, while the system without ultrasound had to spend 26 hours to achieve the same sludge concentration. This identifies that the presence of ultrasound strongly affected sludge structure as well as sludge thickening of the FO process. Furthermore, the ultrasound/FO hybrid system could achieve NH4+-N removal efficiency of 96%, PO43−-P of 98% and dissolved organic carbon (DOC) of 99%. The overall performance demonstrates that the proposed ultrasound/FO system using seawater as a draw solution is promising for sludge thickening application. |
| format |
Journal article |
| author |
Nguyen Cong Nguyen Nguyen Thi Hau Chen, Shiao-Shing Nguyen, Nhat Thien Li, Chi-Wang |
| spellingShingle |
Nguyen Cong Nguyen Nguyen Thi Hau Chen, Shiao-Shing Nguyen, Nhat Thien Li, Chi-Wang Application of forward osmosis (FO) under ultrasonication on sludge thickening of waste activated sludge |
| author_facet |
Nguyen Cong Nguyen Nguyen Thi Hau Chen, Shiao-Shing Nguyen, Nhat Thien Li, Chi-Wang |
| author_sort |
Nguyen Cong Nguyen |
| title |
Application of forward osmosis (FO) under ultrasonication on sludge thickening of waste activated sludge |
| title_short |
Application of forward osmosis (FO) under ultrasonication on sludge thickening of waste activated sludge |
| title_full |
Application of forward osmosis (FO) under ultrasonication on sludge thickening of waste activated sludge |
| title_fullStr |
Application of forward osmosis (FO) under ultrasonication on sludge thickening of waste activated sludge |
| title_full_unstemmed |
Application of forward osmosis (FO) under ultrasonication on sludge thickening of waste activated sludge |
| title_sort |
application of forward osmosis (fo) under ultrasonication on sludge thickening of waste activated sludge |
| publishDate |
2023 |
| url |
https://scholar.dlu.edu.vn/handle/123456789/3021 https://doi.org/10.2166/wst.2015.341 |
| _version_ |
1778792479598837760 |