Archive for June, 2007

What is the effect of MWCO membrane towards fouling?

Saturday, June 23rd, 2007

Right, this post is actually being made because of my other post about Between TiO2 and UV254 to contribute fouling and performance. If you look at the paragraph 2, it tells everything about the problem of the permeability. Im gonna try again to define the problem. Well, permeability as I already ...

Between TiO2 and UV254

Friday, June 22nd, 2007

Between TiO2 and UV254 which one contributes more towards fouling? This question that I would like to discuss in this post. The answer at this time will solely based on my own experience. From what I have before about permeability, it is important factor to be considered. Because as I ...

Titanium dioxide: paper review

Wednesday, June 20th, 2007

So I read this paper, and found something valuable there. Photocatalysis is often used for treating water organic pollutants. Titanium dioxide is usually used because it is stable and inexpensive. This paper stated that one author observed that increasing the initial pH of phenol, increases the decomposition rate, reaching max ...

UV/Vis Spectrometer Cintra

Sunday, June 17th, 2007

Im fixing my theses and putting the information about UV/Vis spectrometer I used for my experiment. I was using GBC Cintra 20 UV/Vis spectrometer. When I try to find out about the details through google, hardly to get relevant information. But if you are interested to find out about Cintra ...

Global warming and emission

Saturday, June 16th, 2007

Its been a long time ago when I wrote about global warming. I just checked again and I remember I lost that article due to hosting problem at that time. Well, probably if I have more time I will rewrite it, or copy it here if I still have the ...

Recovery rate of flux membrane operation

Saturday, June 16th, 2007

In this post I want to know about the flux recovery rate. From the book Basic Principles of Membrane Technology I found out the explanation about recovery rate. It define the ratio between qp and qr. Qp is permeate flow rate while Qr is feed stream flow rate. Before I ...

Water supply and wastewater system: brief history

Friday, June 15th, 2007

Long time ago, probably up to present, public water facilities were part of civil engineer's project. Water supply and wastewater drainage were among the job whose civil engineers do to preserve environment and protect human health.

Why TiO2 is most often used photocatalyst

Friday, June 15th, 2007

This post is dedicated to answer several questions raised why TiO2 being a popular photocatalyst and thus often being used for photocatalysis and photodegradation any unwanted compounds or chemicals including microorganism, organic particles. I just found in a paper of Weimin Xi (2001), he stated that TiO2 is having considerable photocatalytic ...

Fouling as membrane shortcomings

Friday, June 15th, 2007

I do not care if this post will contain only a couple hundred words. I just found an interesting definition of cake formation on the membrane surface. As you probably aware, this cake formation along with pore blockage, concentration polarization have caused fouling, sort of clogging in conventional filter, which ...

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Thursday, June 14th, 2007

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