A few years ago, biogas digesters were very popular in rural areas. Why are they so rare now?

In fact, biogas digesters have rarely been heard of in recent years. I remember more than ten years ago, when it was being vigorously promoted, agricultural channels often talked about how good it was to build biogas digesters in rural areas on TV, and there were propaganda slogans on the walls of rural hometown. However, it has been rarely heard in recent years.

In fact, biogas digesters have rarely been heard of in recent years. I remember more than ten years ago, when it was being vigorously promoted, I often saw agricultural channels talking about how good it was to build biogas digesters in rural areas on TV, and there were propaganda slogans on the walls of my hometown in rural areas. However, it has been rarely heard in recent years.

Personally, there are many reasons for the poor promotion of biogas digesters. The first is the cost. Although I remember that there was a part of subsidy for building biogas digesters at that time, I had to take some money myself. This is very difficult to promote for rural people who are not rich in life. After all, not everyone can be the first person to eat crabs.

The second problem is the building location of biogas digesters.

Unlike solar water heaters, biogas digesters can be used as soon as they are put on the roof. The construction of biogas digesters needs to be specially selected and the area is not very small. This is a problem. You can build it farther away. The biogas transportation is not good, and it costs money. If you build it closer, there is no place. So it's not as good as your own pot.

Third, the maintenance of biogas digesters

Actually, some villagers built biogas digesters at that time. In the first two years of use, many villagers still feel very good, but there are many problems in the construction of many biogas digesters, which leads to problems after two or three years of use. Moreover, it is not only necessary to pay for the biogas digesters, but the key is that they can't be repaired sometimes. It's great now. Originally, some villagers were still in a wait-and-see state. Who would dare to build it with such poor feedback from users?

Third, the supply of raw materials for biogas digesters

The reason why biogas digesters were attractive at that time was that it was not only clean energy, but also almost free. Because the raw materials of biogas are human and animal manure, straw and so on. And it was just forbidden to burn straw at that time, so what should I do if the straw is not allowed to burn? Put it in the biogas digester to supply gas! What a practical method.

However, there are problems during the construction of biogas digesters. The biogas digesters can be built at no cost, but they also need supporting facilities such as sheepfolds, pigsty and toilets. Where can this money come from? If it is not built, who will put these raw materials into the biogas digester? This is a hard job.

Another problem is the straw. It is forbidden to burn straw, but straw can be changed to other fields. What is better now than in previous years is that agricultural machinery has developed rapidly. When the summer harvest and autumn harvest come, large harvesters can directly crush the straw back to the field, which not only saves time but also saves labor. But the raw materials for biogas digesters are gone.

The fourth is that biogas digesters are not safe enough

Although biogas digesters have many advantages, the technology was not very good at that time. The safety of biogas digesters has always been worthy of people's consideration, especially in summer, when the weather is hot and a lot of biogas can't be used up, just like a large time bomb, it feels dangerous to think about it, so many biogas digesters have to be deflated in summer. But whether biogas is useful in winter is really contradictory.

Finally, the living conditions of rural people are better now. Liquefied gas and tap water have entered the village, and almost every household has solar water heaters. Therefore, biogas digesters are more difficult to popularize.

the above comes from developing agriculture through science.