2. Many farmers have a yard in front and back, with flowers and plants in the front yard and fruits and vegetables in the back yard. At this time, we can use it to grow vegetables, fields and land, which not only saves chemical fertilizer, but also nourishes crops. Moreover, naturally fermented manure is much better than the current agricultural chemical fertilizer. Now the orchard advocates the use of farmyard manure, which can kill two birds with one stone. Secondly, compared with cities and towns, the population density in rural areas is not large. In terms of treatment, it is generally advocated to build biogas digesters and reuse wastes.
3. The biogas digester can produce a part of biogas through pressurized oxygen fermentation, and we can use it as gas to cook and boil water. Septic tanks can be built in the yard and then piped to the toilet at home. Septic tanks are generally built in three compartments, and the discharged sewage can be discharged together with domestic sewage in a small manhole. In addition, it should be noted that the bath water and toilet sewage are best discharged separately, because the bath water is generally large and it is easy to cause the septic tank to overflow.