Question

In an effort to harness energy from biomass, which one of the following groups CANNOT be economically used as a direct combustible fibre?
A. Paddy straw and cotton stalk
B. Bajra and wheat straw
С. Woody shrubs and urban garbage
D. Rice Husk and Bagasse

Answer 1

Hint: As raw materials, cotton stalk, wheat straw, rice straw, and bagasse are used successfully to produce man-made boards, especially wheat straw. The byproducts of rice can not be used directly as a combustible fibre.

Complete answer: Rice Straw management remains a problem in which more rice and more straw are grown each year to satisfy the increasing demand. A significant contributor to dangerously high levels of air pollution associated with health problems is the widespread burning of rice straw. At the same time, a number of alternative uses are being created by researchers, engineers, and entrepreneurs that transform rice straw into a product form which sustainable value chains can be constructed to support rural people. The cotton stalk prevents it from being an overwintering site for insects such as the pink bollworm. The cotton stalk left in the field after the harvest must be buried or burned to prevent economic costs and prevent damage caused by the insect. The cotton stalk includes lignin and carbohydrates that can be converted into a number of usable types of energy, such as cellulose and hemicellulose. Thermochemical or biochemical processes are known as technologically beneficial solutions. Therefore, paddy straw and cotton stalks cannot be economically used as direct combustion fibre.
So, option A is the correct answer.

Note: The paddy straw is a byproduct of rice created when the paddy is harvested. The byproduct of rice straw depends on the variety, stubble cutting height and the moisture content during harvesting. One of the essential byproducts of cotton crops is cotton stalk. Most of the cotton stalk is referred to be wastes, although a very small part of it is used as a fuel.