De La Salle Sewage Treatment Plant

De La Salle Sewage Treatment Plant

Introduction

Definition:

Sewage treatment is the process of removing contaminants from wastewater. Its objective is to produce an environmentally safe fluid waste stream and a solid waste suitable for disposal or reuse. With suitable technology, it is possible to re-use sewage effluent for drinking water, although this is usually only done in places with limited water supplies, such as Windhoek and Singapore.

-            http://en.wikipedia.org/

On 11th day of December 2014, Thursday, we visited the Sewage Treatment Plant in De La Salle University – Dasmariñas. Sewage treatment is the process of removing contaminants from the wastewater. It is done before the water will be reuse in any form. De La Salle Sewage Treatment Plant in Dasmariñas, Cavite was built to serve the requirements and to reuse and save used water from consuming too much inside the campus. The plant process consist of lift station, collecting tank, aeration tank, settling tank, sludge digestion, chlorine contact tank and a sludge drying bed and it has 180 cum/day, average capacity. It started in 1997 and it has been consistently producing water with quality that is better to what the government set as parameter.

Process

We have a huge environment here in DLSU-D and students are reaching up to an average of thousands and thousands. We are using water in our daily activities and it is very essential; causing our water consumption to increase at every rate possible.

That is why we have our STP. Waste water from flushing the toilets, washing and cleaning goes down to a larger sewer pipe, the larger pipe also joins a major pipe that lead to the STP. It is cleaned and filtered before it can flow to rivers and other water areas. However, there are stages to undergo before our waste water is properly disposed.

The first part is where the collection removal happens. It involves the separation of organic solid matter from water. Unwanted objects are removed and undergo thru the activated sludge where it is pumped away for further treatment. The rest of the water is the moved to the next treatment stage.

Next is where the water is put into large tanks wherein air is pumped into the water to encourage bacteria to breakdown the tiny bits of wastes that were not removed during the previous stage. Then, the ‘almost’ treated water is passed through another tank. Again, the sludge is scrapped and collected for treatment. The water at this point is almost free from different unwanted substances. Thus, the filtered water is then released into the river.

Sewage Treatment Plant

Sewage Treatment Plant process is similar to Septic Tank mechanisms but it provides a process to help break down solids to produce a cleaner, more environmentally friendly waste.

Advantage

1. Save water

2. Recycling of water

3. Ground water, surface water source is safe from pollution due to treatment of waste water.

4. Treated water is used for vegetation.

5. Cost of transportation of polluted water is saved.

6. Air pollution is limited to treatment plant.

Disadvantage

1. Space.

2. Money is used for construction of waste water treatment

3. Handling of dry sludge, cake.

4. Food chain is missed for various organisms, life cycle river animals.

5. Various chemicals are produced to treat the waste water

6. Nature capacity (river capacity is remains un-utilized to treat the waste water during flowing) to treat the water remains un-utilized.

Source: Yahoo Answers