| Author: | Tang, Lu |
| Title: | Anaerobic fluidized-bed membrane bioreactor with greywater for water reuse |
| Advisors: | Lee, Po-heng (CEE) |
| Degree: | M.Sc. |
| Year: | 2015 |
| Subject: | Sewage -- Purification -- Anaerobic treatment. Hong Kong Polytechnic University -- Dissertations |
| Department: | Department of Civil and Environmental Engineering |
| Pages: | ix, 30 pages : illustrations (some color) |
| Language: | English |
| Abstract: | Today, water shortage, energy security, and climate change are three of the most significant global issues that need to be addressed. In order to solve these issues, anaerobic treatment with greywater for water reuse, energy recovery, and reduction of carbon emission has been proposed. Although anaerobic treatment with greywater has shown its promising potential to solve these issues, the bottleneck of this process is poor degradability of anionic surfactants significantly containing in greywater. The objective of this paper was to study the removal/adsorption performance of a common anionic surfactant, sodium dodecyl sulfate (SDS), existing in greywater with anaerobic treatment process. This process is called anaerobic fluidized bed membrane bioreactor (AFMBR) with granular activated carbon (GAC) inside the reactor. In this study, GAC was used as fluidized medium to support biological growth. The performance of AFMBR and adsorption capacity of GAC was studied. GAC adsorption capacity was tested onto both SDS and glycerol. GAC adsorption capacity onto SDS can reach 55 mg g⁻¹, while for glycerol it can only reach 3.5 mg g⁻¹ which can be negligible in the reactor. Total COD and SDS concentration was measured from permeate effluent daily and twice a week, providing a removal efficiency of 91% and 98%, respectively. In all those removed SDS concentration, 20% were degraded by biological anaerobically, 80% of total removed SDS were adsorbed by GAC and almost 98% of removed glycerol were biodegraded, just 2% of removed glycerol can be adsorbed by GAC. In this lab-scale treatment, effluent COD and SDS concentration was really low, at a value of 25±5 mg g⁻¹ and lower than 2 mg g⁻¹, respectively. Greywater can be reused in many ways, such as toilet flushing in coastal city, car washing, irrigation and even for drinking. We envision that this AFMBR within GAC process could serve as a cost-efficient method on anionic surfactants removal as a treatment of anaerobically-treated greywater for reuse. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b28183198.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 1.25 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/8065