Superviser: Professor Moisă Altăr MSc Student: George Popescu
Superviser: A/Prof. Bas Heijman Promotor: Prof. Luuk Rietveld
description
Transcript of Superviser: A/Prof. Bas Heijman Promotor: Prof. Luuk Rietveld
![Page 1: Superviser: A/Prof. Bas Heijman Promotor: Prof. Luuk Rietveld](https://reader036.fdocuments.net/reader036/viewer/2022062410/5681525f550346895dc09291/html5/thumbnails/1.jpg)
10-01-2014 Challenge the future
DelftUniversity ofTechnology
Superviser: A/Prof. Bas Heijman
Promotor: Prof. Luuk Rietveld
Ran Shang
Application of Tight Ceramic Ultrafiltration (TCUF) and Ceramic Nanofiltration (CNF)
for water reuse
![Page 2: Superviser: A/Prof. Bas Heijman Promotor: Prof. Luuk Rietveld](https://reader036.fdocuments.net/reader036/viewer/2022062410/5681525f550346895dc09291/html5/thumbnails/2.jpg)
2
Ceramic membranes
![Page 3: Superviser: A/Prof. Bas Heijman Promotor: Prof. Luuk Rietveld](https://reader036.fdocuments.net/reader036/viewer/2022062410/5681525f550346895dc09291/html5/thumbnails/3.jpg)
3
Ceramic membranes
- Homogeneously distributed membrane pores- Long service life- High chemical and thermo- stability
Excellence
- High cost (5~10 times) - Fragile
Drawback
Defect in a ceramic membrane
![Page 4: Superviser: A/Prof. Bas Heijman Promotor: Prof. Luuk Rietveld](https://reader036.fdocuments.net/reader036/viewer/2022062410/5681525f550346895dc09291/html5/thumbnails/4.jpg)
4
Tight Ceramic UF (CTUF) & Ceramic NF (CNF)
Polymeric membranesCeramic membranes
Relative size of common materials
![Page 5: Superviser: A/Prof. Bas Heijman Promotor: Prof. Luuk Rietveld](https://reader036.fdocuments.net/reader036/viewer/2022062410/5681525f550346895dc09291/html5/thumbnails/5.jpg)
5
Multivalent anion rejection using negatively charged CTUF or CNF
A membrane pore with negative surface
charge
Electrostatic repulsionDouble layer
overlap
Cations >> anions
Take-home message:• 40%~87% of Ortho-P rejection by a 3 kDa TCUF, dependent on
operational conditions (flux, cross-flow velocity, pH).• Higher solution pH leads to higher rejection, due to enhanced
negative surface charge.
(Shang et al. Wat. Res. V. 48 P. 498-507)
![Page 6: Superviser: A/Prof. Bas Heijman Promotor: Prof. Luuk Rietveld](https://reader036.fdocuments.net/reader036/viewer/2022062410/5681525f550346895dc09291/html5/thumbnails/6.jpg)
6
Secondary effluent water filtration using 3kDa TCUF
Rejections, %
Organic matter45±3 in DOC 61±2 in UV254
Phosphate 62±7
Sulphate 16±1
Nitrate 1.0±0.5
Conductivity 4.1±0.1
Take-home message:• Phosphate has negative charge and low diffusion: thus easy
removal.• Membrane fouling by effluent organic matter can enhance
phosphate rejection.• About 50% or higher organic removal.
![Page 7: Superviser: A/Prof. Bas Heijman Promotor: Prof. Luuk Rietveld](https://reader036.fdocuments.net/reader036/viewer/2022062410/5681525f550346895dc09291/html5/thumbnails/7.jpg)
7
Implication(1) for effluent water reuse
PS
Municipal wastewater
AS SS
MMF UF RO Demiwaterfor reuse
Digester
Biofouling in RO
Coag. TCUF/CNF
RO Demiwaterfor reuse
>95% P removal~40% OC removal ~60% P removal
~50% OC removal~0,3 µg P L-1
~3 mg L-1 TOC
P limitation!!Low organic carbon!!
Poor removal of OC, P
Biofouling
![Page 8: Superviser: A/Prof. Bas Heijman Promotor: Prof. Luuk Rietveld](https://reader036.fdocuments.net/reader036/viewer/2022062410/5681525f550346895dc09291/html5/thumbnails/8.jpg)
8
Implication(2) for sewer mining
PS
Municipal wastewater
AS SS
MMF UF RO Demiwaterfor reuse
Digester
CNF RO Demiwaterfor reuse
Digester
Energy
Energy
Energy
Struvite
P limitation
Anaerobic RO
Biofouling???
Municipal wastewater
PS
Efficiency in concentrating OC and P ???
![Page 9: Superviser: A/Prof. Bas Heijman Promotor: Prof. Luuk Rietveld](https://reader036.fdocuments.net/reader036/viewer/2022062410/5681525f550346895dc09291/html5/thumbnails/9.jpg)
9
Thank you for your attention!