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7.
4.
1 Application of UniFed New Nitrogen and Phosphorus Removal Process
The UniFed process has been successfully applied to production-scale sewage treatment plants
.
For example, the Bathurst (NSW) domestic sewage treatment plant in New South Wales, Australia, which has adopted the UniFed process since October 1998, has confirmed the operational effect of the process
Figure 7-15 UniFed operating time at each stage of each cycle
7.
4.
The combined process of air flotation-aerated biological filter-membrane bioreactor with a project scale of 300-360m 3 /d is used to treat the bathing wastewater of the student bathroom of Tongji University and reuse it in the landscape water
.
When the dosage of air flotation is 15mg/L, the hydraulic retention time of the biological aerated filter is 0.
The wastewater is the bathing wastewater discharged from the bathroom of the students in the main campus of Tongji University.
The water quality and quantity are relatively stable and the pollution level is not high
.
The designed water volume is 300-360m 3 /d.
Table 7-7 Water quality of bathing wastewater
Table 7-8 Indicators of main structures and equipment
Figure 7-16 Bathing wastewater treatment process
7.
4.
3 Unitank Process Application
The sewage treatment plant in Shijiazhuang High-tech Industrial Development Zone treats 100,000 tons of sewage per day, adopts Unitank technology, and covers an area of 7.
2hm 2
The treatment process is: raw sewage → grating → grit tank → Unitank → contact tank → discharge into Wangyanggou
.
The surplus sludge is pumped to the sludge collection tank, processed by a dehydrator with pre-thickening function, and then the sludge cake is transported
The sewage treatment plant Unitank pool consists of 6 groups, each group is composed of 3 square reaction tanks, the net size of the single tank is length×width×height=35m×35m×7m, and the effective water depth is 6m
.
The pools on both sides use peripheral weirs to effluent
