1.设备在安装的时候，在将设备放于地下后，在填土之前，我们必须将该设备内充满污水至50%以上的水位，增加设备重力，防止设备上浮。同时，在再进行回填时，绝对不允许去采用污泥回填，要严格执行无水回填土要求，因为污泥重量太轻，很容易造成设备松动、上浮。
1. When the equipment is installed, after the equipment is placed underground and before filling, we must fill the equipment with sewage to more than 50% of the water level, increase the gravity of the equipment and prevent the equipment from floating upward. At the same time, when backfilling again, it is absolutely not allowed to use sludge for backfilling, and the requirements for anhydrous backfill should be strictly implemented, because the weight of sludge is too light, it is easy to cause equipment loosening and floating.
2.其次，在填土的过程中，需要注意的是产品底部两侧必须用人工塞实。要按照这个要求达标：填至30~50cm以上时，每30cm必须夯实一次，直至与产品顶部相平。
2. Secondly, in the process of filling, it should be noted that both sides of the bottom of the product must be plugged manually. To meet the requirements: when filling to more than 30-50cm, every 30cm must be tamped until it is level with the top of the product.
3.填土的时候，需要保证的是，污水处理设备顶部以上回填土必须密实，同时，在回填时回填土的质量必须符合回填土验收规范，绝对不允许用建筑垃圾为回填土使用，土中的尖角、石块及硬杂物必须剔出，而且回填土进行回填时必须均匀回填，切忌局部猛力冲击。
3. When filling, it is necessary to ensure that the backfill above the top of the sewage treatment equipment must be dense. At the same time, the quality of the backfill must conform to the backfill acceptance specifications. It is absolutely not allowed to use construction waste as the backfill. The sharp corners, stones and hard debris in the soil must be removed. Moreover, the backfill must be evenly backfilled, avoiding local strong impact.