Test: Waste Water Story - UPSC

Sewage is wastewater released by homes, industries, hospitals, offices and other users. It also includes rainwater that has run down the street during a storm or heavy rain. The water that washes off roads and rooftops carries harmful substances with it. Sewage is a liquid waste. Most of it is water, which has dissolved and suspended impurities.

Biodegradable wastes decompose in nature by action of microbes into simple simpler substances.

Polythene and plastics are non-biodegradable and very harmful substances.

Vegetable and fruit peels, plants and animal excreta and cotton clothes are biodegradable while plastic is non-biodegradable.

Vegetable peels, cotton cloths and paper are plant products and organic wastes while DDT is manmade inorganic substance used as pesticides.

Maintenance of health and sanitation, registration of births and deaths, providing primary education are the functions of Municipal Corporation whereas disposal of the civil disputes is not its function.

The process of waste treatment is called as sewage treatment to remove harmful substance from water to make it portable.

Correct Answer :- c

Explanation : The bacteria that decompose organic wastes are called anaerobic bacteria.

Anaerobic digestion is a sequence of processes by which microorganisms break down biodegradable material in the absence of oxygen. The process is used for industrial or domestic purposes to manage waste or to produce fuels. Much of the fermentation used industrially to produce food and drink products, as well as home fermentation, uses anaerobic digestion.

Biodegradable wastes are generally organic in nature obtained from plant and animals.

The correct option is Option A.
Non - Biodegradable objects or materials are those which do not easily decompose by natural factors. Non - Biodegradable Waste is the kind of waste that cannot be decomposed by the biological processes. Most of the inorganic, plastic and artificial waste are non-biodegradable.
 

Waterborne diseases are caused by drinking contaminated or dirty water.Contaminated water can cause many types of diarrheal diseases, including Cholera, and other serious illnesses such as Guinea worm disease, Typhoid, and Dysentery.

Heart attack is not caused by improper disposal of sewage .

Herbicides, Fruits and vegetables waste  are organic substances present in waste water . 

WWTP stands for Waste Water Treatment Plant