Archive for June, 2007

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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