Review of English Language Learning Website

This is a review of an English language  from the class homepage.

The website is called a4esl.org:

First I chose to review a simple crossword.

I would recommend this activity for a beginner level English language student because it's fun and the vocabulary is very easy and common.

I hope you enjoy this website!

List of Materials

No.	Material	Cost in Rp
1	Sand	5,000
2	Activated Charcoal	5,000
3	2 Plastic Bottle	1,500 each
4	Filter	15,000
5	Cloth	5,000
	Total	33,000

Types of Filter

Filtering water
There are many ways to filter water to make it safer from germs . Some filters, like the ceramic filter below, require special equipment . Others need no special equipment and can easily filter small or large amounts of water before disinfecting .
Cloth filters
In Bangladesh and India, a filter made of finely woven cloth is used to remove cholera germs from drinking water . Because the cholera
germ often attaches to a tiny animal that lives in water, filtering out these animals also filters out most cholera germs . This method also filters out guinea worms . You can make a cloth filter out of handkerchiefs, linen, or other fabric such as the cloth used to make saris . Old cloth works better than new cloth because worn fibers make the spaces in the weave smaller and better for filtering .
1 . Let water settle in a container so that solids sink to the bottom .
2 . Fold the cloth 4 times and stretch or tie it over the mouth of another container or water jar .
3 . Pour water slowly from the first container through the cloth into the second container or jar .
Always use the same side of the cloth, or germs may get into the water . After using the cloth, wash it and leave it in the sun to dry . This kills any germs that may be left in the cloth . In the rainy season, disinfect the cloth with bleach . Be sure to clean the container you use to store the filtered water in, at least every 2 to 3 weeks .

Ceramic filters
A small water filter can be made from fired clay coated with colloidal silver (a substance that kills germs) . With basic training, any potter can easily make these filters .

The steps to create my product

These pictures that I drew on the board during ESL class. The purpose is to explain anyone who wants to know more about water filtration.

Why Filter Water?

Filtering water is a task worthy of effort, especially if you have the health and safety of your family in mind. After all, the quality of water these days cannot be trusted, especially in areas with a lot of industrial activities. A lot of contaminants are usually detected in most water supply system.



With such danger, it is important that you take the necessary precautions to make sure the water you use is clean and pure. But don’t worry, this does not necessarily have to cost you a lot. In fact, you can make your own water filter. Here's the picture:

Water Filtration Process

Waste water and water from most natural resources must be cleaned before becoming available for general everyday use. Water treatment plants take potential drinking water through aeration, coagulation, sedimentation, filtration and disinfection process before it can be available for human consumption.

1. Filtration Process

   • The steps that make up the water filtration process are pre-filtration, sediment filtration, carbon block filtration and ultraviolet treatment.

   Pre-Filtration

   • The pre-filtration step removes all rock, mud, feces and other large debris from incoming water.

   
   

   
   

   
   

   
   

   Sediment Filtration

   • In this step the water passes through a sediment filter. The sediment filter has smaller pores for the removal of smaller debris like sand, dirt and bugs.

   Carbon Block Filtration

   • Block of Activated Carbon from Carbon Filter
     

     This step incorporates and activated carbon filter to induce carbon bonding. The carbon bonding works to cleanse the water of pesticides, herbicides, cleaners and other chemical impurities.

   Ultraviolet Treatment

   • This final step uses high levels of ultraviolet light to kill harmful microorganisms like bacteria, viruses, fungi and algae.

Water Filtration Benefits

  Does not require gas and electricity
Hassle free, unlike boiling
No need to buy bottled water cans 
Clear, odorless and great tasting
Extremely affordable and economical
Easy to use

Personal Project

Water is essential for life. People, animals and plants all need water to live and grow. But in many places people don't have enough water to stay healthy. Many people have to travel long distances to collect water. And often, the water is available isn't safe to drink. Therefore for my personal project, I'm going to make a water filtration.

The goal is to see if it is possible to filter dirty water, to make clean water, using filters created from objects around the house. 

AoI: Environment

Key Question: how can we change water through filtration?