Environmental Engineering Diary

What home water purification system suit your need?

arie — Mon, 19 May 2008 13:52:40 +0000

It is of utmost importance for any home to have a home water purification system installed. Gone are the days when mere tap water is safe to drink. There are just too many contaminants in today’s tap water that drinking straight from the tap is a sure ticket to the hospital. (more…)

RO Water purifier for your house water treatment

arie — Fri, 09 May 2008 02:36:10 +0000

Without a doubt, you have heard of the contaminants and microorganisms that come with tap water, making it unsafe for drinking. This is most likely the reason why you prefer to purchase bottled drinking water. What you probably do not know is the fact that bottled water is not that safe an option when you compare it to tap water. This is because there are still many sediments and contaminants that remain in bottled water. The main thing to keep in mind here is the process of purification that the drinking water undergoes. RO water purifier, or reverse osmosis water purifier, is still one of the processes that lead the list of effective purification. (more…)

Whole House Water Purifier

arie — Thu, 08 May 2008 03:21:04 +0000

With all the problems we deal with in our daily lives, the matter of drinking water becomes quite easy to overlook. However, this is one issue that demands much attention, and it would make much sense to give it the attention that it deserves. We can never discount the fact that the human body is dominantly made of water, and it is because of this that we need safe drinking water in our system to keep our bodies in tiptop condition. (more…)

Organic Chemistry and introduction

arie — Wed, 29 Aug 2007 15:25:55 +0000

What do you think at first about organic chemistry? Imagine that actually we are made up, built and operated with the help of organic compounds. When we see something, we absorp light, the retinal, which is organic compound, works by converting light into nerve impulses. These nerve impulses are sent to our brain cells with the help neuro transmitter amine (organic compounds) which build bridges between brain cells so that the impulses can walk through, and be translated. Amazingly, these are automatic, and somehow there is no one will ever know the exact mechanisms how these procedures are always repeating and repeating to make work our human function. (more…)

Screening and Intake

arie — Tue, 28 Aug 2007 08:00:04 +0000

The book Reynolds only reviews a short description of screen, specifically bar screen. Generally, if the intake is located to suck reservoir or river a two layer bar screen may be employed. First layer of bar screen is coarse bar screen. This screen has clear spaces between screen up to 75 mm (3″). As the clear space is quite big, it may be used to remove large debris (woods, rocks), or plastics as shown below. (more…)

Competition

arie — Mon, 27 Aug 2007 06:21:59 +0000

The competition of Unit Operations is made to encourage, stimulate and accelerate the learning of Unit Operations among students. Students are expected to develop the three aspects, they are affective, cognitive and psychomotoric.

Rules
1. Each assignment will have their own guidelines and technical entry.
2. Maximum point is 10, this is achieved when a group succesfully demonstrates a good discussion, deep analysis and correct answer.

After semester ends, points are accumulated and averaged to determine the winner. (more…)

Introduction for Unit Operations

arie — Thu, 23 Aug 2007 07:22:32 +0000

In Department of Environmental Engineering, Faculty of Civil Engineering and Planning, Sepuluh Nopember Institute of Technology (ITS), there are two important and core subjects to represent the existance this program study. They are Unit Operations and Unit Processes. We describe Unit Operations probe to physical process for water and wastewater treatment process.

The keypoints of Unit Operations as shown by picture below are based on physical mechanism to remove and treat unwanted pollutants. Students are expected to: (more…)

Unit Operations

arie — Thu, 23 Aug 2007 05:03:07 +0000

Unit Operations Base Camps

Competition
Competition details, including scores are listed on competition post.

Profile

Class A

Class B

Flocculator_B Profile

Sedimentator_B Profile

Screener_B Profile

Stabilizer_B Profile

Filter B Profile

Courses First Week

Learning system may be found here:

Contract (First Week): Powerpoint file
Contract (First Week): pdf file

Outline of Unit Operations - The scheme of Unit Operations materials

Introduction to Unit Operations - This course will give some insights about what you will learn.

Screening and Intake - Explanation about types of screens, intake and calculation of intake and bar screens

Screening and Intake - powerpoint file

Courses Second and Third Week

Courses in second and third week talk about prasedimentation. There is no ppt file for prasedimentation. Currently, the discussion is for determining settling velocity (Vs). Next meeting will talk about choosing the right Vs.

Wednesday, September 12th 2007, Class A, 07 AM: Rapid and Slow Mixing by Ir Bowo DM
Thursday, September 13th 2007, Class B, 11 AM: Rapid and Slow Mixing by Ir Bowo DM
Friday as usual by Ir. Bowo

Courses Fourth Week

Pre-sedimentation - delivered by me, we continue previous meeting about Vs, now we will concentrate to measure the performance of Vs

Courses Eleventh Week

Filter - Filter powerpoint file created by Bieby Voijant, ST., MT.

Outline of Unit Operations

arie — Wed, 22 Aug 2007 08:41:46 +0000

Unit operations taught at this department is focused on the process of water and wastewater treatment instruments. The first thing that student need to know is definitely what is Unit Operations, so here are the outlines (this page is updated regularly, student ought to visit periodically to maintain updated news, materials and information for next lecture): (more…)

TiO2/UV/H2O2 efficiency in removing organic compounds and color

arie — Thu, 09 Aug 2007 07:06:09 +0000

I am now reading “Removal of color substances using photocatalytic oxidation for membrane filtration processes” for deeper understanding of what membrane is capable of. The study was aimed to determine the effectivity of UV/TiO₂/H₂O₂ to remove color. So the technique can remove TOC at 38% and color ₄₀₀ at 89%. The interesting fact was if the dosage of H₂O₂ is less than 0.016 M, then the system is accelerated, produce better TOC rejection and color removal, over-dosage (more than 0.016) declines the rejection enhancement. I only get this point, it appears that there is a break point dosage at which best removal can be achieved. However, there is no information yet the comparison between only TiO₂/UV and TiO₂/UV/H₂O₂ of the efficiency. (more…)