池差的预制与安装
Precasting and Installation of Pool Difference
化粪池的池盖全部为钢筋混凝土盖板，厚度为5cm。第一池的盖板要留出放便器的口和出粪渣的口，第二池的盖板也要留出一个口，便于清渣和疏通过粪管，第三池盖板要留出出粪口，便于出粪，每个口都要预制小盖。安装大盖板时要用水泥沙浆密封、口盖要盖严，防止雨水流入，保证池内封密发酵。
The septic tank cover is all reinforced concrete cover with a thickness of 5 cm. The cover plate of the first pool should leave out the mouth of the toilet and the mouth of the excrement residue. The cover plate of the second pool should also leave a mouth for clearing the residue and dredging through the excrement tube. The cover plate of the third pool should leave out the excrement outlet for easy excrement discharge. Each mouth should be precast with a small cover. When installing the large cover plate, it should be sealed with water and sediment slurry, and the mouth cover should be tightly sealed to prevent rainwater from flowing into the tank, so as to ensure the sealed fermentation in the pond.