Water Pollution and its Control
Water Pollution and its Control: Overview
This topic discusses the causes and preventive measures of water pollution. It describes biochemical oxygen demand and eutrophication in detail. Further, it discusses a case study on integrated waste water treatment.
Important Questions on Water Pollution and its Control
What are industrial effluents and their harmful effects?
A river with an inflow of domestic sewage rich in organic waste may result in death of fish due to lack of oxygen.
Which method in sewage treatment, removes suspended solids? Is it primary treatment or secondary treatment?
A river with an inflow of domestic sewage rich in organic waste may result in death of fish due to lack of oxygen.
Algal blooms make water unfit for human consumption but cause the enormous growth of fish.
BOD indicates the amount of organic pollution present in an aquatic ecosystem.
The sewage water decreases the biological oxygen demand.
Water prevention and control of pollution act was implemented in the year of
The term used for the excessive growth of algae, plants and animals in water bodies due to the nutrient enrichment particularly with nitrogen and phosphorus is
The electric power plants cause _____(thermal/air/noise) pollution.
DDT and mercury undergo biomagnification in the food chains.
In the treatment of waste water discharge, which treatment stage involves biological treatment?
Which heavy metal is responsible for Minamata disease? (Mercury/Cadmium/ Zinc)
Which one of the following diseases is not due to contamination of water?
Which of the following components of waste water is incorrectly matched with its examples?
Thermal wastewater out of electricity–generating units:
(A) May enhance the growth of plants and fishes in extremely cold areas.
(B) Eliminates a large number of organisms resistant to high temperatures.
(C) It causes damage to the indigenous flora and fauna.
Ecological sanitation is a sustainable system for handling
Which of the following are advantages of ecological sanitation?
I. It is a practical, hygienic, and efficient method of waste disposal.
II. It is cost-effective.
III. Human excreta can be recycled into natural fertilisers, to replace chemical fertilisers.
Ecological sanitation is a sustainable system for handling human excreta, using dry composting toilets. Such ‘Ecosan’ toilets are working in?
Cleaning of waste water in Arcata Marsh involves?
