Difference between biomass power generation and domestic waste power generation

First, biomass and domestic waste

biomass, according to the definition of the International Energy Agency (IEA), refers to the various organisms formed through photosynthesis, including all plants, animals and microorganisms.

Biomass energy is solar energy stored in the form of chemical energy in the form of biomass, it has been one of the important energy sources for human survival, is second only to coal, oil, natural gas after the fourth largest energy, in the entire energy system occupies an important position.

Broad concept: Biomass includes all plants, microorganisms, and animals that feed on plants and microorganisms and their wastes. Representative biomass such as crops, crop waste, wood, wood waste and animal waste. Narrow concept: Biomass mainly refers to the agricultural and forestry production process in addition to grain, fruits, straw, trees and other lignocellulose (referred to as lignin), agricultural product processing industry waste, agricultural and forestry waste and livestock production process of livestock manure and waste and other substances.

Main components of biomass:

Sugar:

Common sugars are cellulose, starch, maltose and glucose. When the two glucose molecules are dehydrated, their molecules will join together and become starch, which is conducive to storage. The more glucose molecules that are dehydrated and aggregate to form a larger group, cellulose, this substance is relatively stable, and only certain bacteria in nature (such as biogas bacteria) can break it down into starch or glucose. Some glucose is converted into other substances by cells, participates in various life activities, and is composed of different carbon framework substances with different substances under different conditions.

Cellulose is the largest molecular weight of sugar, the human digestive system can not break it down, so it can not provide energy for the human body, but modern research has found that it is conducive to the survival of beneficial bacteria in the intestine, can promote gastrointestinal peristalsis, is beneficial to human health. There are bacteria in nature that can break it down into simple glucose.

Starch is a simple sugar than cellulose, is an important food and raw materials for human beings, it in the human mouth under the action of saliva amylase, is broken down into maltose, so people chew rice flour many times, feel a little sweet. It can be broken down into simple glucose for the body to absorb and use.

Maltose, which is found in our common beer, is a more complex sugar than glucose after the breakdown of starch.

Glucose is the simplest sugar, which can be used directly by human cells, and reacts with oxygen to produce carbon dioxide and water in living organisms, while releasing energy to provide energy for life activities. It is also involved in building cells, such as ribose.

Aldehydes

A carbonyl (C=O) group and a hydrogen (-H) group can be combined to form a new group, called the aldehyde group (CHO) group, the substance with this group is called aldehyde, we are quite familiar with formaldehyde, only one carbon in the carbon framework of the aldehyde, formaldehyde is an important feature is that it can make the protein stable, with anti-corrosion effect. It is also an important chemical raw material, widely used in industrial and cosmetic industries, at the same time, excessive unnatural formaldehyde can cause cancer. Formaldehyde in nature is beneficial to the human body, such as tomatoes are a good anti-aging food, it contains a trace of formaldehyde, this content determines its free radical removal characteristics. There is also formaldehyde in the smoke emitted by plants when they are not fully burned, so the meat that has been smoked can be preserved for a long time. In an artificial heart valve transplant, a cow's heart valve is treated with an aldehyde called glutaraldehyde and then transplanted into a human heart to improve health. Formaldehyde also causes a lot of harm to humans. According to U.S. authorities, five billion pounds of formaldehyde are produced worldwide each year. Decoration materials exceed the standard, cosmetics exceed the standard, and illegal use for food anticorrosion is also often reported.

Acid:

A carbonyl (C=O) group and a hydroxyl (-OH) group can be combined to become a carboxyl (COOH) group, the substance with this group is called acid, formic acid, acetic acid, propionic acid, fatty acids, amino acids are closely related to our life "acid". Formic acid, also known as formic acid, bees sting people, will inject a little formic acid into the human body, can cause local skin swelling and pain. Acetic acid is acetic acid, made from grain, because the starch in grain can be broken down into glucose, and then converted into vinegar under certain conditions. It has two carbon frames attached to it, so it's called acetic acid; If the number of carbon connected to the carbon framework is three, called propionic acid, people are familiar with lactic acid is a propionic acid, glucose can also be converted into lactic acid under certain conditions, such as human exercise, due to insufficient oxygen supply, glucose decomposition is not complete, muscles will produce a lot of lactic acid, making muscles feel sore; The human body is more sensitive to acid and will produce an uncomfortable reaction. Only the stomach has hydrochloric acid, which remains highly acidic. If the number of carbons in the carbon framework is multiple, and it is arranged in a row, collectively referred to as fatty acids; If you combine it with an amino group, it becomes a familiar amino acid. These acids are essential nutrients for the human body. From the human body's reaction to acid, it can be known that modern people through high-fat and high-protein food, the human body ingests a large number of fatty acids and amino acids, forming an acidic constitution.