When Li Er visited the men's toilet, the eldest grandson was also visiting the women's toilet, this husband and wife, what did you say about a toilet, they actually entered the visit.

This couple, no cure, let's continue to visit.

"Niangniang, you see, this is the women's toilet, can enter the toilet for two people at the same time, such as when there are guests at home who need to go to the toilet, there will be a maid waiting outside, she can guide the toilet person how to go to the toilet, this is a brand, if you enter the person, as long as you turn it over, it will be written that there are people, and then turn it back when you leave, if you don't turn it back, the maid will also enter the inspection, this is a door, as long as the door is closed inside, it is a personal space, you can squat, you can also sit, These are two movable stands, just put them down, you can sit on them, if you don't like it clean, there is toilet paper here, you can spread it on top of it. As she spoke, the little lady took some yellow-colored papyrus paper from the side. When these papers are out of the workshop, they are steamed at high temperatures, which is absolutely safe, and there are no so-called bacteria or anything. "This is Yang Heng's special noun, and the little lady can't figure it out.

Where did this toilet paper come from, it was naturally made by Yang Heng, that, when the Yang family just looked a little better, Yang Heng was not used to going to the toilet, this, using the toilet chip, very unaccustomed, used to toilet paper in the last life, if you don't use it in this life, you always feel that you can't wipe it clean, and there is damage to the skin, so Yang Heng just got better at home, and began to make toilet paper, with the power of a water wheel, it is naturally easy to make mashed bark. And straw tools. This pulp is very simple to beat. But then how to form the paper caused some trouble for Yang Heng. What's the trouble, it's about lime water, and the problem of alkali, after the last, Yang Heng still used alkali, which Sun Simiao got from some Taoist priests who made alchemy, Sun Simiao was used to make medicine, and Yang Heng was used to make paper. In this way, Yang Heng did not burn lime, and there was no lime water to use.

At first, the paper made by Yang Heng was too hard for toileting and too brittle for writing, and after many times, it was officially made of toilet paper, that is, some wool paper.

For safety, Yang Heng steamed the paper again in a dry and high-temperature environment, and then packaged it. This is the real toilet paper, what is the packaging used for. Or wrap it directly with these papers, but put it in a dry place, to say that the first workshop of the Yang family, in addition to carpentry, this is the first workshop, because there is no rumor, and it is not used to make money, so up to now, it is still used within the Yang family, even Changle and Yuzhang did not take it seriously, they were all maids with a small bag, which could be used at any time and then Yang Heng's house to pick it up.

Seeing Changle and Yu Zhang's very calm expressions, it proved that they had used it, and the eldest grandson slashed the two of them with his eyes, it was really a woman's mother, and she didn't even tell their father, queen and queen mother about such a thing, so that they were still suffering from toilet funding.

In fact, they can also use what kind of cloth and silk, or even paper to go to the toilet, but if they are discovered by some officials, it will be a big deal, what a waste, Emperor Yang appeared second, so, for the sake of fame, Li Er still has to use the toilet to raise money, and the toilet paper made by Yang Heng, there is no such saying, if you want to write, how to write, not one, as soon as you write, it is directly through the paper, this paper Yang Heng even made some special, that is, the color is different, compared with these earthy yellow, The ones are off-white, and these are napkins. However, this kind of Yang Heng does not do much, and it is not very useful, if someone washes napkins, do you still need napkins, so these napkins have become special paper for women.

"Yang Heng, what is here?" Similarly, when Li Er opened a drawer on the wall, he found a stack of yellowish paper inside, which was also asking this question. After Yang Heng answered, Li Er's face only changed slightly, and he did not express his opinion.

The last place to visit is the most important equipment, the biogas tank, this is a relatively large biogas digester, there are two pools in it, there are two valves connected in the middle, usually the two pools are figured out, if it is said that when discharging, a pool is discharged, the valve on the side of the pool is closed, and it can only produce gas from a pool, and naturally the gas production is relatively small at this time.

The most interesting thing is the feed port and the water gushing outlet, which has water inflow every day, the natural water intake is more, Yang Heng designed a water wheel on the water gushing outlet, the water gushing out, through a channel into the circulation channel again, into a storage tank in the corral, when the corral is cleaned, as long as the people who clean the corral sweep some forage and manure into the canal, and then let go of the valve of the storage tank, these things will be quickly washed into the biogas tank, and some have been precipitated many times. Even if the water without any smell enters the circulating waterway of the toilet, there will be some water consumption in the process of circulation, and some hot water will be added to the canal at this time, that is, the excess hot water will be added through the boiling water room, so that the gas production will increase in summer and will not reduce the gas production too much in winter.

These waterways made by Yang Heng are all made of cement and bricks, and even the cover of the cement slab is covered on it, so there will be no smell, if it takes a long time, it can also be lifted off the slate to clean it down, but this time is not much, after the biogas digester is discharged, the canal will be washed with a large flow of water, so that there is basically no sediment in it.

To say that this biogas digester, in some aspects, is even better than Yang Heng's previous life, first of all, these canals, as well as various circulation systems, and there are many shortcomings, that is, too much copper is consumed, the pipeline will not be very long, can not reach the ability of long-distance transportation, and the pressure is unpredictable, and the only thing can only use torches, and water gushing channels to control the air pressure, someone needs to monitor, but in this era, there are many people, some people do not care about adding more population, in Yang Heng's view, this will instead train a group of qualified workers, maybe in some factories in the future, Yang Heng, who will use these people, does not need to be trained.

This visit, finally over, Li Er is generally satisfied, that is, about toilet paper, these two people have a lot of opinions, but these let Changle to solve, she signed a supply and demand contract with the eldest grandson in the palace, that is, to cry poor way to ask the eldest grandson to buy toilet paper from here in the way of purchasing, the price is quite appropriate, if the wages of workers are counted, there will be a slight surplus, if the development costs are counted, then it will lose money, but this is a long-term deal, it is appropriate, and, that is, you can put the name of the royal exclusive on it, so that it can be sold to the outside world at a high price, originally Yang Heng discussed with Changle to supply the palace for free, but after Changle talked about it, it was also profitable in the palace, and he was content.

"Yang Heng, next I will arrange for some ministers to visit your biogas system, pay attention, we must receive these ministers well, we must let them come and return happy, and let every minister order a system like this, so that our Chang'an City will be much cleaner."

From Li Er's tone, Yang Heng heard that he was still not very cold to Chang'an City, he really didn't have a cold, that is, Yang Heng didn't have a cold, he often encountered some dung cars in the city, or picked up dung, resulting in a stinky smell all the way, if there is a car leaking feces, in this way, this street is stinky for a few days, and there are often people pouring feces into the river, and it can't be said that the ancients were very civilized, in short, ancient cities also have some pollution sources, and precisely, Yang Heng's biogas system can solve this problem.

This allowed Li Er to find a good way to solve the smell of the city, and he would not be harassed by those officials. You must know that for this problem, Li Er was harassed a lot, but he had no way to solve it, so he had to put the matter on those martial marquis, but what the martial marquis could solve could only solve some leaking vehicles, in fact, nothing could be solved. (To be continued......)