Technical Writing

Process Paragraph

Methane Gas
Methane gas can be extracted from household waste in several steps. First, the waste is put into the warming bed where the waste will be decomposed into dirt methane gas and fertilizer through the process of heating. The fertilizer will be pumped out of the bed, while the dirt methane will flow through the pipe into the dirt trap. Here, the dirt will be concealed through the extraction process. This dirt then can be thrown away via the release cap at the bottom of the trap. Next, the methane is flowed into the gas indicator that contains water.This apparatus has sealed top so that the gas which pops up out of the water won't flow out to the air outside the system and can only flow out of the indicator through the other pipe it has. The gas will pass the pressure releasing tub which contains water to adjust the gas' pressure with the air outside the system. Finally, this pure methane gas is kept in the inner tubes that keep the gas' pressure high so that when the tap is opened, powerful gas will flow out.

Sewage Disposal Unit
In a sewage disposal unit, the sewage is processed in three stages. First, the sewage is put into the Settling Tank through the main sewer. After days in the tank, the undecayed solids which then will be removed and burned will settle. Next, the unsettle sewage is drained to the Pump House for preparation of the next process. The Pump House pumps the polluted water up to the brick work called Sprinkler Beds which consist of rotating arms, jets, and filters for purifying process. The water is dispersed down by the jets under the rotating arms to filter the small solids contained.The filters of stones and micro-organisms then purify the water flowing down through them. This purified water is now clean enough to enter the river.

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posted by Chandra Gondowasito @ 2:41 PM