Liu Ling really didn't know what the emperor was doing, but under the pressure of the ladies, he could only tell what he saw one by one, saying that the emperor was indeed a 'stinky thing', so he would stink all day long. His Majesty ordered the baggage battalion to dig several large pits in a vacant lot in the barracks of the cavalry brigade of the Imperial Protector Army, and then built them with bricks and stones, and smeared them with green plaster mud, and then put all the horse manure collected by the cavalry brigade into them, covered and sealed, and dug trenches around them to bury some pottery pipes.

As for what these things to do, Liu Ling didn't know, but he heard the emperor say that he would use what gas was produced by the fermentation of horse manure buried in the pit, and then use pipelines to draw it out, and use fire and flammability for lighting, and even replace firewood and charcoal for heating and cooking. Now His Majesty is walking around horse manure every day, and in the summer, it is simply stinking, maggots are everywhere, and the environment is very bad, which is simply disgusting. He only went for one day yesterday, and he was dizzy from smoke and couldn't eat, so today he found someone else to accompany His Majesty on his behalf.

Liu Ling was already confused about what the emperor was doing, and what he knew was just hearsay, and he didn't know why, so the queen and the others listened to it even more in a fog, and they didn't know what the emperor did. But one thing is clear, the emperor is in the cavalry brigade every day, and has not gone anywhere else, and he is dealing with filth, not looking for flowers and willows. However, although I don't know what to do, I also vaguely feel that His Majesty must be doing a big thing by working so hard.

In fact, they guessed correctly, Zhao Yu is doing another big thing that transcends history, of course, the original intention is to solve the problem of garbage siege. He considered that he would use a lot of manpower to send the excrement and garbage out of the city, and that he might as well try to digest some of it in the city and use it. Nowadays, since we are still in the agricultural era, most of the garbage is degradable organic matter, and the best way is to convert it into usable biogas through fermentation.

Zhao knows that biogas is a mixture of multiple gases with similar properties to natural gas. In addition to direct combustion for cooking, drying agricultural and sideline products, heating, lighting and industry, biogas can also be used as fuel for internal combustion engines and the production of methanol, formalin, carbon tetrachloride and other chemical raw materials. The feed liquid and sediment discharged after fermentation by the biogas plant contain rich nutrients and can be used as fertilizer and feed.

However, Zhao Yu also clearly knows that it is not the same as understanding, after having this idea, he still adopts a steady way of small steps to advance, first conduct experiments to accumulate experience, and then try it out on a small scale, and then promote it on a large scale after the technology is mature. After all, the use of biogas is also dangerous, and if you don't get it right, it will explode.

The reason why Zhao Yu first chose to start experiments in the army is that there are nearly 100,000 imperial guards and box troops stationed in the capital, who are also large producers of garbage; The two armies are well-disciplined and well-trained, and they can carry out orders and prohibitions, which are not only easy to operate, but also easy to promote; It is easy to mobilize manpower in the three armies, and there will not be so many verbose things, let alone ask why, there are many concerns.

In the private trial, there is a process for people to accept new things, and there is a lack of understanding of the changes and benefits that biogas brings to life. In addition, the people lack the knowledge and means of biogas digester operation and management, and it is difficult to ensure the normal operation of biogas. In addition, the people's ability to maintain and maintain supporting equipment is weak, and it is easy to be dangerous. It is far less favorable than the conditions for trial implementation and promotion in the military.

In addition, there is a lesson from the past, as many people in London, England, the first city to put biogas into practical use, think of gas lamps that turn on at dusk. Until then, the streets had been lit by whale oil lamps, which were much brighter because of the glow of the gas lamps. In the beginning, people were afraid of the light of gas lamps. Ladies are disgusted by the fact that their skin can be seen too clearly and that their faces don't look good.

In addition, there is a risk of explosion when used indoors, and the walls and ceilings are more likely to be soiled than gas lamps, so they are not popular. For these reasons, the first places to use gas lamps were in shops, theaters, street lamps, etc., and it was not long before it was extended to public areas of the home, such as entrances, living rooms, and dining rooms, and finally to bedrooms, and the spread of gas lamps was very slow.

Of course, Zhao Yu is not greedy, and wants to let Da Song enter a new era of using biogas as fuel at once, and his plan is to solve the problem of garbage disposal, first use it in public places, and choose to use it in an open area rather than indoors for safety reasons. The most suitable thing is the lighting system, and this is also in demand, the main roads, city defenses, military camps, and even the imperial palace need to be lit at night.

Zhao's plan is to lay out and pre-bury pipelines during urban reform while the experiment is being carried out. The first to carry out the lighting transformation of the city defense system, you must know that this is also a big money-burner, every night each city gate and city wall to light lanterns, torches, in case someone sneaks in. At present, the main thing is vegetable oil, even if it is cheap, it can't stand it every day, which has become a huge expense.

After the initial experience was gained, it was then extended to the city's main roads, Miyagi, military barracks and ordnance supervision workshops, so as to consume a large amount of urban waste. As for the promotion of households, Zhao Yu thinks it's better to forget it, the houses in the city are mainly wooden structures, once there is a gas leak and an explosion, it will be a disaster, and if it is not good, it will burn the company camp and turn Lin'an City into a sea of fire.

The cavalry brigade barracks are not far from Beigong, where there are not only thousands of officers and soldiers, but also thousands of war horses, and there are enough 'raw materials' for the production of biogas, so Zhao Yu chose the cavalry brigade as his experimental base. He is very clear about the conditions and principles of biogas production in theory, but there is always a distance between theory and practice, and the technical testing conditions and related equipment required are even more heaven and earth than modern ones, and everything needs to be reconsidered and planned.

The production of biogas does not need to dig a pit and fill in the raw materials to be used, and relevant equipment and operation specifications are also required before it can be put into use. As the 'inventor', Zhao Yu is also half a bottle of vinegar, and he also crossed the river by feeling the stones, not to mention others, so they all started from scratch. And only Zhao Yu can competently preside over this project, so naturally he will inevitably do it himself, and he will be contaminated with some stench.

Zhao knows that there are many difficulties from planning to practicality, but he also knows that this is an opportunity to promote technological development. From the construction of biogas digesters, the sealing of pipelines, the transmission and control of gases, there is no existing technology, and the old equipment needs to be improved or redesigned. You must know that there is no valve to control the opening and closing of biogas, let alone a meter for measuring air pressure, etc., so he can only use the current materials to design as much as possible.

In order to improve the scientific and technological level of the Great Song Dynasty, Zhao Yu not only gathered the craftsmen who worked as supervisors, but also gathered together about 20 students selected for the preparation of the Academy of Sciences, and used this opportunity to 'learn together', popularize basic physics and chemistry knowledge to them in practice, and then change their inherent concepts and understanding of the natural world, and open a window to a new understanding of the world for them.

Zhao Yu's fresh on-site teaching method naturally made those scholars who couldn't pick their shoulders, couldn't lift their hands, and walked without getting muddy. The hot weather, the harsh environment, and the filth all over the ground are all disgusting, but he is fighting on the front line, of course, these people do not dare to complain about being tired, but they do feel the magic from it, and the unexplained phenomena of the past have also found the answers here one by one.

In the face of a group of white students, Zhao Hao, as a teacher, also has a headache, and a problem that can be easily solved in modern times has to rack his brains at this time. For example, the yield of biogas has an important relationship with the pH of the fermentation liquid, and in the past life, the results could be obtained by dipping it with pH test paper, but now it can only be observed with the eyes.

When it is found that the feed liquid in the digester is a little blue, it means that the feed liquid is acidic; If there is a layer of white on the feed liquid, it means that the feed liquid is alkaline. When the material liquid is acidic, take the lime and mix it with the bucket of water, stir it thoroughly first, and then pour it directly into the pool from the feed port and stir it, so that the lime clarifier is in full contact with the material liquid in the pool. When the feed liquid is alkaline, the urine of the livestock is poured with the green weeds that are cut into inches in advance and piled up outside the pool, and then put into the pool from the feed port and stirred evenly, and the feed liquid in the pool is fully contacted to make it return to normal.

In addition, there is the problem of pressure monitoring, the pressure is low enough to ignite, and the high pressure will not only produce the danger of deflagration, but also involve the bearing capacity of the pipeline. In modern times, a few pressure gauges can solve the problem, but not only are there no standards, but there are no standards, which requires Zhao Yu to create simple measuring instruments and formulate standards so that experience can be converted into data and quantified.

From the perspective of promotion, quantification is also necessary. Horse manure is the main raw material here, but in some places it may be human manure, pig manure, and even grass and straw. And different weather, season, temperature, the change of the proportion of feeding amount have different results, without the support of data, it is difficult to achieve large-scale promotion and utilization only by experience, which requires continuous exploration and experimentation.

Zhao Yu also knows that he can't eat hot tofu in a hurry, and he can't stay by the biogas digester every day to collect data, so he knows that the most important thing for him is to complete the basic work of talent training, standard formulation and data solidification, and the future work can guide these students to complete a lot of follow-up work.

As for the fact that it is difficult to complete systematic research now, what Zhao Yu wants to do is not to let students trace back to the source and understand the microscopic world that is still difficult to see at the moment, but can only tell them the transformation principles and laws of material change, and slowly study them in depth in the future. To this end, he also built a laboratory in the cavalry brigade, which of course was very rudimentary, but it was also possible to complete simple physical and chemical experiments to test his theories and develop relevant standards.

Now Zhao Yu has to go to the court to discuss matters, review official documents, deal with emergencies, and do these things, every day is so busy that his feet don't touch the ground, and he doesn't have time to change clothes and take a bath, and when he returns to the harem, he naturally brings the taste home. Despite this, he was still tired and happy, and felt that this was the life he wanted compared to conquering the world and governing the people.

Zhao Hao felt that he might not be able to go down in history, but he felt that he might make a note in the history of science and technology, which would make China's scientific and technological development hundreds of years ahead of schedule......

After more than a month of hard work, the biogas digester of the cavalry brigade camp was finally completed, and put into use, every day when it gets dark, the barracks of the cavalry brigade will light the biogas lamp in the camp, which is particularly dazzling in the dark night, especially in the foothills of the original palace city in the north of the city, the light of day and night is like a bright light in the city, which has aroused the amazement and reverie of countless people.

Zhao Yu naturally did not let go of this opportunity for publicity, and ordered to hold an open day and invite people from the government and the opposition to visit. When everyone sees that the feces that used to be avoided have become a combustible gas, they are all amazed, not only to light the lamp, but also to cook and heat. After some literati read it, they recited poems to describe this victory, and for a time praise followed, regarded this as a miracle, and he was once again pushed to the altar, and the courtiers also wrote to the whole country, asking for the promotion of the whole country, to turn waste into treasure, highlighting the prestige of the Great Song Dynasty.

However, Zhao Yu was indeed very indifferent to this, he did not have a fever in his head, but still acted according to the plan step by step. Because he knows that when a person has too much power and is praised too highly, he is prone to misestimate himself and the situation, do some things that surpass Britain and catch up with the United States, and want to realize some grand ideals.

Of course, it is good to have ideals, and it is not wrong to work hard to realize them, but it is a bit dangerous to use the strength of the whole country to realize one's unrealistic dreams. Emperor Yang Guang of the Sui Dynasty died like this, Zhao Yu knew very well that when he succeeded as emperor, the domestic and international situation was very good, after more than 20 years of operation by his father, the once broken country has been unified, the national strength has gradually become well-off, and neighboring countries such as Turkic, Tuyuhun, and Goryeo are also peaceful coexistence and mutual benefit.

This situation also gave Yang Guang the confidence and confidence to achieve more ambitious goals, and he decided to run to achieve the goal of catching up with the prosperity of the Han Dynasty. It is also the first to engage in infrastructure construction. Every month, 2 million people were sent to build Luoyang City. Collect strange materials and stones from all over the world and transport them to Luoyang. Peasants were forced to transport thousands of miles, leaving many people dead of exhaustion on the road.

Then Yang Guang dug the Grand Canal and led his troops to launch three expeditions to Goryeo, but the treasury was empty and the people were exhausted. In the end, the rush to achieve the previous work was wasted, the people were unhappy, and the whole country was full of smoke, and as a result, Xiao Wall died in the official mutiny, which is a stinking thing that has been passed down through the ages......