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Debunking 6 Myths about sewage treatment plants

 

Nowadays people, in general, have good knowledge of wastewater and sewage, thanks to Google. They do more research than those who are in the field. It creates more confusion rather than giving clarity. So in this post, I would like to share a few myths in the hope that they provide some clarity to sewage treatment plants and help you make better decisions.

 

 

1st Myth: Separation of the used water must be done to treat

 

There are two to three categories in sewage water like black water, greywater and white water. In brief black water contains faecal matter, greywater includes soaps, detergents, oils etc., and white water is the water that we use for just washing which does not have many chemicals. People are confused about sewage and whether the sewage treatment plant can handle all these different categories. In reality, a well-designed sewage treatment plant can treat all the waste coming from domestic usages like toilets, Bathing and Laundry and produce clean water to be used for Gardening, flushing, floor wash, and many more purposes.

 

 

2nd Myth: Sewage treatment plants produce foul smell/odour

 

Most people think of sewage as some septic tank or someplace polluted by raw sewage. If the sewage treatment plant is well designed and performs well, there will not be our plants the people living close by it do not even know that there is a sewage treatment plant.

 

 

3rd Myth: We must add bacterial culture regularly

 

Some sewage treatment plants need bacterial culture to require the bacterial culture to regularly. It is not a mandate to do that in our plants. Once the initial micro-biological activity develops, it will survive on its own. As a result, the plant performs much better than the plants where you need to add bacterial culture.

 

 

4th Myth: You have to use membrane filters to achieve the desired water quality

 

It is not necessary to use membranes in sewage treatment to filter the complete treated water. Membrane filters are best suitable for removing the Total Dissolved solids, but in STP, the plant’s primary purpose is to remove total suspended solids. If you plan to use the treated water for potable purposes like drinking or bathing, then it is suggestable. Otherwise, we do not need to use membrane filters for use in gardening, flushing, and floor wash.

 

5th Myth: Sewage treatment plant produces lots of sludge

 

Many think that sludge is solid waste that comes from domestic waste. The truth is that sludge is dead micro-organisms, and as such, does not produce any smell, and the quantity is also significantly less. Improper plant design creates Large amounts of sludge when the undigested sewage mixes with the dead micro-organisms and produces a foul smell. Also, it can be because of the bacterial growth process like the suspended or attached growth process.

 

 

6th Myth: Many types and pieces of equipment should be there in the plant

 

Most sewage treatment plants require several pieces of equipment in the process. Which makes the plant complex and challenging to maintain. It is not necessary to use several types and amounts of equipment. If the biological process happens, ideally, a couple of equipment is sufficient to do the job.

 

 

Editor – in – Chief

Arun Karunakaran

 

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