The Effect of Soluble Organic Matters in Industrial Wastewater Effluent on UF Membrane Fouling
Date Issued
2011
Date
2011
Author(s)
CHANG, Yen-Rung
Abstract
As human population continues to increase, the demand and completion on limited water resources are expected to rise tremendously in the coming decades. Therefore, water recycling will be the future development in developing water purification technology to ensure the reliable quantities and qualities water for public use. Nonetheless, the water purification and reclamation projects basically are focusing on the reuse of domestic wastewater instead of industry wastewater reuse. Therefore, the objective of this study is using microfiltration (MF) as pretreatment to remove non-soluble matters in effluent of Guei-Shan industrial district wastewater treatment plant and followed by ultrafiltration (UF) to treat the MF effluent in order to meet the industry wastewater reuse water qualities and standards. DAX-8 resin was used to fractionate hydrophilic and hydrophobics of soluble organic compounds, i.e., soluble microbial products (SMP). Further, total organic carbon (TOC), component of carbohydrates and proteins and hydrophobicity of the SMP were conducted and investigated for organic removal and membrane fouling analysis.
An average flux of 20 LMH was maintained about 80 h and the increasing of trans-membrane pressure (TMP) was monitored for UF performance evaluation, as membrane fouling resulted in an increase of TMP. During the 80 h membrane filtration, it was found that there is no relationship between the removals of TOC with the increasing of filtration time was observed, as that of the removal of TOC was maintained 0.8-1.1 mg/L throughout the filtration test. The finding also showed hydrophilic TOC (39.14 mg) were more rejected by UF than hydrophobic TOC (28.53 mg), and it could be hypothesized that the hydrophilic TOC is one of the major contributors on membrane fouling. SMP (consisting of carbohydrate and protein) contents were also analyzed in the 80 h membrane filtration. The results showed the concentration of SMP (carbohydrate) was consistently removed with the increasing of membrane filtration time. Rapid membrane fouling was attributed to rejection of protein and carbohydrate on the membrane. The hydrophobicity of carbohydrates and proteins performed different membrane fouling results. For example, hydrophilic and hydrophobic of carbohydrate rejected 12.16 mg and 20.21 mg, respectively on the membrane, while as protein rejected 49.78 mg and 38.87 mg, respectively. Therefore, the results of this study indicated that protein was the major component of SMP than carbohydrate, and hydrophilic of protein caused more severe permeate flux decline which led to a shorter membrane service periods.
Subjects
UF membrane
hydrophobicity
SMP
fouling
SDGs
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-100-R98541121-1.pdf
Size
23.54 KB
Format
Adobe PDF
Checksum
(MD5):469510661325a38130c97582975b036b