Questions

Sewage treatment generally involves three stages, called primary, secondary and tertiary treatment.

Primary treatment consists of temporarily holding the sewage in a quiescent basin where heavy solids can settle to the bottom while oil, grease and lighter solids float to the surface. This removes material that will either float or readily settle out by gravity. It includes the physical processes of screening, comminution, grit removal, and sedimentation.

Secondary treatment removes the soluble organic matter that escapes primary treatment. It also removes more of the suspended solids. Removal is usually accomplished by biological processes in which microbes consume the organic impurities as food, converting them into carbon dioxide, water, and energy for their own growth and reproduction.

Tertiary treatment includes removal of nutrients such as phosphorus and nitrogen and practically all suspended and organic matter from waste water.

IP addresses are converted to a domain name by DNS - Domain Name System.

Climatology is a study of climate which is subspecialty of environmental science studies.

This is for the first time that no Literature Prize will be given in 70 years because of a #MeToo scandal.

The nutrient which provides the maximum energy is Fat. It provides the energy of 9 calories/gram.

It is the letter 'e', that is the first on earth, the second in heaven.

It appears twice in a week, that appears once in a year.