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The excrement that people excrete every day passes through the sewage pipe and finally discharges it into the river.
Our fecal sedimentation tank enters a large amount of wastewater and feces every day, as soon as the feces enter the sedimentation tank, most of the feces quickly dissociate from the lump into flocculents, suspended in the pool water, and flush out to the public sewage pipe with the incoming wastewater, and finally enter the river, the function of this sedimentation tank is only to turn the lump in the feces into flocculents, to avoid its blockage of the sewage pipe, it does not have the role of collecting feces, just a stopover for feces to flow into the river.
There are 500 million people in the cities of our country, and a large amount of manure is produced every day, and if these manures are handed over to farmers as organic fertilizer, they can meet the organic fertilizer of at least 200 million acres of farmland, but now, these manures are wasted in vain, artificially guided into the rivers, polluting the river water that people drink. <>
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In fact, the stool that has not been discharged does not disappear out of thin air, but stays in the intestines, because it is not discharged in time after holding it for a long time, so it will be absorbed by the intestines for a second time, and the water in the stool will become smaller after being absorbed again, so it will accumulate in the intestines instead of being discharged. If you have not had a bowel movement for a long time, you should pay attention to improving your lifestyle habits, because lifestyle habits will also affect the passage of stool.
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People with constipation have very little stool, the motor function of the large intestine is disordered, and the stool that is not discharged in time is left in the large intestine, in fact, everyone has stool [left in the large intestine without excretion], but there are more people with constipation, you can eat more crude fiber vegetables to help discharge, such as celery, leeks and so on.
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The stool comes back into the stomach and then absorbs and recirculates it.
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Discharge into an underground septic tank.
The principle of the septic tank is that the solidified matter decomposes at the bottom of the tank, and the hydrated objects in the upper layer enter the pipeline and flow away, which prevents the pipeline from being blocked and gives the solidified objects (feces and other garbage) sufficient time to hydrolyze.
The role of septic tanks.
1. Ensure the environmental sanitation of the living community and avoid the diffusion of domestic sewage and pollutants in the living environment.
2. In the working environment of anaerobic decay of septic tank, kill mosquitoes, flies and eggs.
3. Temporary storage of sludge, organic sludge for anaerobic decay, and cooked organic sludge can be used as agricultural fertilizer.
4. Pretreatment (primary treatment) of domestic sewage, precipitate impurities, and hydrolyze macromolecular organic matter into small molecule organic matter such as acid and alcohol, so as to improve subsequent sewage treatment.
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There is a septic tank under every house in the city, and the excrement produced by people every day is discharged into the septic tank through pipes, and after a period of sedimentation and treatment, this excrement is divided into the residue of sewage sinking at the bottom.
The sewage is discharged through sewage pipes to sewage treatment plants for treatment, and the treated water can be used to irrigate crops, water flowers, or discharge into rivers, lakes and seas.
The sediment that settles at the bottom will be decomposed by microorganisms and bacteria, and the volume will be greatly reduced. What if there is too much accumulation and the septic tank is full, then a manure pumping truck is needed.
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Because after we obtain chemical energy from food, there is no need for food residues to remain in the body, so it is very simple to excrete toxins and metabolites in the body.
The digestion and absorption of food provides the substances and energy required by the body, and the nutrients in the food can be directly absorbed and utilized in addition to vitamins, water and inorganic salts, and the substances such as proteins, fats and sugars cannot be directly absorbed and utilized by the body, and need to be decomposed into small molecules with simple structures in the digestive tract in order to be absorbed and utilized. The process by which food is broken down into small, absorbable substances in the digestive tract is called digestion. This small molecule enters the blood and lymph through the epithelial cells of the mucosa of the digestive tract and is the process of absorption.
For the unabsorbed residue, the digestive tract excretes it in the form of feces through the large intestine.
Hehe, give it to me, I used to like to ask this kind of question, it seems that I met my compatriots today. (bs say "don't know").
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I cried, but I didn't dare to cry, my parents were around; Maybe a few upstairs families are well-off, and they don't feel anything, but for us poor families, we have experienced too many difficulties, sadness, injustice, and setbacks since childhood, when you look back and just remember, when you look back, your father worked in a black coal kiln thousands of miles away to support her family, and my mother got up to cook for us brothers. When the brothers grew up, they were rarely able to go home for work, and their parents stayed at home alone; When looking back on the past, there is no way to describe it except tears.
Jingba, about one or two hundred yuan.
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