Question

Select all the correct answers.

In which three ways can we use biomass as a source of energy?

by extracting hydrogen from it
by converting it into liquid fuels
by making suitable bacteria act on it
by burning it directly
by mixing it with petroleum-based fuels

Answer 1

Biomass can be used for energy by directly burning it, converting it into liquid biofuels, and through bacterial digestion to produce biogas. Other methods exist, but these three are prominent and widely practiced methods.

We can use biomass as a source of energy in several ways. Three common methods include:

• By burning it directly, such as wood, for heating and cooking, which is one of the oldest methods of using biomass.
• By converting it into liquid fuels like ethanol and biodiesel, which can be used for transportation needs and are considered a sustainable option due to their carbon-neutral characteristics.
• By having suitable bacteria act on it during the process of anaerobic digestion to produce biogas, which can be used as fuel.

It is also worth noting that while biomass can be mixed with petroleum-based fuels, this method is not as commonly cited as a primary form of using biomass for energy. Additionally, extracting hydrogen from biomass is a possible avenue, but it is not one of the most prevalent methods used today.

Answer 2

The correct ways to use biomass as a source of energy are:

By converting it into liquid fuels: Biomass can be processed into liquid biofuels like biodiesel and bioethanol, which can be used as alternatives to fossil fuels.

By burning it directly: Biomass can be burned directly as a source of heat and energy. This is often done in the form of wood, agricultural residues, or dedicated energy crops.

By making suitable bacteria act on it: Biomass can be used to produce biogas through a process called anaerobic digestion, where bacteria break down organic materials to generate methane, a valuable energy source.

Step-by-step explanation: