Which is the safest method of waste disposal among the following?

Which is the safest method of waste disposal among the following?

The best methods of safe disposal are segregation and composting. After segregating the waste and separating materials for reuse and recycling, the waste material should be disposed of. Care must be taken that waste disposal does not pollute the air, groundwater, surface water and land.

What are the main components of proper waste disposal?

The main components of solid waste management include onsite handling, storage and processing; waste collection; transfer and transport of solid waste; and waste recovery and final disposal.

How do we treat waste?

Four Effective Processes to Treat Wastewater

1. Physical Water Treatment. In this stage, physical methods are used for cleaning the wastewater.
2. Biological Water Treatment. This uses various biological processes to break down the organic matter present in wastewater, such as soap, human waste, oils and food.
3. Chemical Water Treatment.
4. Sludge Treatment.

What is removed from wastewater?

screening and grit removal to remove large particles. sedimentation allows tiny particles to settle out from still water, which produces sewage sludge and effluent (the liquid which remains on top) the sewage sludge is digested anaerobically by specific bacteria.

How are chemicals removed from wastewater?

Chemical precipitation is the most common method for removing dissolved metals from wastewater solution containing toxic metals. A chemical reaction, triggered by the reagent, causes the dissolved metals to form solid particles. Filtration can then be used to remove the particles from the mixture.

What is sewage water called after treatment?

It includes physical, biological and sometimes chemical processes to remove pollutants. Its aim is to produce an environmentally safe sewage water, called effluent, and a solid waste, called sludge or biosolids, suitable for disposal or reuse.

How does sewage go uphill?

The gravity sewer main runs parallel under your street. The pipe is pitched at a very slight angle to allow the waste water to flow down-hill. A switch is activated and the pumps pump the wastewater through a pipe called a force main. The force main pumps the waste water uphill until gravity can take over again.

How many types of STP are there?

Many STPs are known as three-stage because they process their wastewater in three principal steps: primary, secondary and tertiary treatment.

What is ETP and STP?

Effluent Treatment Plant (ETP) – The mechanism or process used to treat the wastewater prior to release into the environment or its reuse. Sewage Treatment Plant (STP) -It is the process of removing contaminants from wastewater and household / industrial sewage, both runoffs (effluents)

Is STP water good for plants?

In a well-run STP, pH, organic matter, nitrogen and phosphorous are very well treated. Salinity or dissolved salts are not treated by an STP. High salinity levels is detrimental for irrigation and other use. High salinity promotes water retention in plants and will affect their growth.

Does STP smell?

Strong smell/odour from the STP: This is a very common complaint from numerous housing communities and even commercial buildings which have an STP in operation. The smell is often very strong and quite often unbearable. It is caused by any one or all of the problems listed above.