arie – ENVIRODIARY

Indoor Air Quality and Satisfaction Level in Apartment

Maret 16, 2018 oleh arie

In this research project, we aim to learn and investigate various factors from air pollutants towards human health indoor. For the very first project, we target several pollutants such as NOx, CO, formaldehyde and VOC and how these affect human satisfaction index. Goal: Environmental Index quality for air pollutants eg Formaldehyde, VOC, NOx, CO, and … Read more

Whole House Water Filter System Models

Agustus 14, 2008 oleh arie

Often we tend to wonder if world peace is such a big issue. This is because we are getting bogged down with some problems eating us up on a daily basis, such as water contamination and health issues. There are water problems across the globe, and this is mainly due to the increased percentage of pollution in the atmosphere, which allows germs to move about freely and cause health ailments. Water is something we all need in our lives, it is an essential element that cannot be avoided and so there are numerous whole house water filters available in the market that help us keep ourselves safe.

Water Filter Supplies for your Home

Maret 25, 2008 oleh arie

The most important thing that we all use freely on a daily basis is water. And so if someone were to tell you that the water you drink or take shower in is dirty and contaminated we would immediately turn towards a water filter. There are times when one would notice repeated illness pertaining to throat or stomach; this could be due to the germs in the water. In the market, there are different kinds of water filters available, for specific purposes like drinking water filter and the whole house water filter. Therefore, it is essential to have one of them in place to avoid any health hazards.

Screening and Intake

Agustus 28, 2007 oleh arie

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.

Introduction for Unit Operations

Agustus 23, 2007 oleh arie

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:

Outline of Unit Operations

Agustus 22, 2007 oleh arie

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):

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

Agustus 9, 2007 oleh arie

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.

My International paper

Agustus 8, 2007 oleh arie

Wow, it has been more than 1 month of my absence updating this blog. I am now busy to submit my paper. The paper is concentration to discuss the advantage and the plus of my ceramic membrane. So first step I want to compose for my paper is to define the benefit of using the ceramic membrane instead of organic membrane. The benefit that I would like to propose is in terms of flux. My experiments had shown that the flux decline of my ceramic membrane is less than the organic membrane. The other thing I would like to display is the process of photocatalysis, by attaching the TiO2 in the surface of the membrane. This is often called immobilization.

Environmental impact statement and Environmental assessment

Juli 5, 2007 oleh arie

The general principle of environmental impact assessment has been explained in previous post. Three outcomes resulted from judging the proposed project are FONSI, EA and EIA. EA and EIS document generally consist on three parts, introduction, description of proposed project and alternatives and description of the environment affected by the proposed actions.

The introduction part of the document will state overview of the project, the purpose, alternative actions, summary of important environmental aspects and the methods of assessment being used. The description of proposed actions and alternative will describe the actions, lists of stage conducted for the project. In this part, alternatives are also mentioned, including a “no-action” alternatives as well. Statement also include the projected actions if the project is not done.

What is the effect of MWCO membrane towards fouling?

Juni 23, 2007 oleh arie

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 mention it in another post about will TiO₂ coating cause denser pore or smaller MWCO? is representing the MWCO of membrane, because permeability is an indicator of the quantity of pure water passing through the membrane. Several conclusions about permeability based on my experiments are located below.