Summary
Biochemical technique treatment: the filtered liquid processed by sand filtration tower would flow into  SAF submerged type biological filtration ponds after the joining of nutrients.The organic matters in the wastewater was absorbed and degraded by the biofilm carrier .In addition,the air which is provided by blower is used to support the microorganism to live.
The sewage after biochemical technique treatment:flow into the setting tank to separation between sludge and water.The clean water would flow into the middle pond and the sewage go through the pumps and middle ponds to flow into the sand filtration tower to filter the remnant particles.Then,the sewage can be discharge meeting the discharging standard.

Technology characteristics
1.High volume load and less occupying area.
2.Resistance to impact load
3 It can run in intermittently.
4 Various bionts
5. Without the problem of sludge inflation