Gas and the Winds Blow

Pelples say I'm free, free wherever I go, I could be anywhere, in all directions. I do not have the form, and easy to change the shape. I am a very light material, unappreciated and tend to be hated by others. I walk aimlessly, always follow wherever he goes, if he run then I will come running after him, if he walk slowly, I will with difficult walking slowly to follow the plot. I am not something that has no purpose, but I would strongly influenced by his existence. If he is silent then I will free fall down and can fell everyone underneath. The effect can be very fatal and can lead slander arise. Me and him am not a harmonious spouse and always hand in hand but his presence will make it easy to determine the direction and destination path. Faster he runs then I will be more eager to catch up and make me free from fatal catastrophe, then I will disappear without anyone knows.

Who am I and what Him is, this is a story telling about the gas and the winds blow.

Problem in Wastewater Treatment

Problems in wastewater treatment is sometimes difficult to avoid, because the sewer sometimes spend the rest of the remaining unfinished process, as can be seen in the following figure.

In the case of waste water treatment as in the example above is because in the process gas to produce gas that can not be disposed of properly, as a result of dissolved gas which still produces a foam that comes out through a hole that available along the sewer.

Some of the foam coming out are solids that eventually harden in the hole channel slits. Some other foam may expel to the end of disposal, its mean can disturb our environmental.