Sewage treatment device and process capable of synchronously and efficiently removing pollutants and comprehensively recycling resources
A sewage treatment device and sewage treatment technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, water/sewage treatment, etc.
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Embodiment 1
[0149] A sewage treatment process that simultaneously removes highly efficient pollutants and fully recovers resources. The process flow is as follows: figure 1 As shown, the mainstream process includes anaerobic biological reaction, ammonia nitrogen ion exchange / regeneration, aerobic biological reaction treatment, phosphorus ion exchange / regeneration and other processes. The side stream nitrogen recovery process includes the first ammonia nitrogen regeneration, hardness ion recovery, biological nitrification, electrodialysis concentration and evaporation crystallization. The side stream phosphorus recovery process includes the second ammonia nitrogen regeneration, Ca 2+ Recovery, phosphorus regeneration and MAP precipitation recovery and other processes.
[0150] In the mainstream process, the anaerobic bioreactor unit includes a sewage inlet pump 20 , a sewage inlet valve 24 , an anaerobic bioreactor 1 , a gas collection valve 25 and a gas collection box 14 connected in seq...
Embodiment 2
[0161] Influent COD, TN, NH of a sewage treatment plant 4 + -N and TP concentrations are 300, 27.5, 25.0 and 3.0mg / L respectively, and after treatment, they need to meet the GB18918-2002 Grade A standard (COD4 + -N<5mg / L, TP<0.5mg / L). The ComRec process was used to carry out pilot test research, and the water treatment volume of the pilot test was 2 tons per day for 30 days.
[0162] For the above sewage to be treated, the device in Example 1 was used for treatment. Specifically, the anaerobic bioreactor adopts UASB, the HRT is 4h, and the reaction temperature is maintained at 35°C. The sewage is pumped into the UASB by the water inlet pump 20 through the sewage water inlet valve 24, and 200L of biogas can be recovered every day. The effluent from the UASB enters the first ammonia nitrogen ion exchange column 2 and the second ammonia nitrogen ion exchange column 3 respectively, of which the volume of the first ammonia nitrogen ion exchange column 2 is is 15L, and the total...
Embodiment 3
[0174] 500mg / L for COD, NH 4 + -N is 40mg / L, TP is 5mg / L of a sewage treatment plant influent, needs to be treated to meet the IV water standard in GB3838-2002 (COD4 + -N3 / d for 30 days.
[0175] This example is roughly the same as Example 2. In this example, the anaerobic bioreactor adopts AnMBR with a volume of 400L and HRT=8h. The ammonia nitrogen ion exchanger in the first ammonia nitrogen ion exchange column 2 and the second ammonia nitrogen ion exchange column 3 is a cation exchange resin, adopting 5 groups of first and second ammonia nitrogen ion exchange columns to operate in parallel, EBCT=45min, 2 groups of first and The second ammonia nitrogen ion exchange column is used for standby. The aerobic bioreactor 4 adopts MBR, the volume is 150L, and the operating conditions are: HRT=3h, SRT=100d, DO=3-4mg / L. The phosphorus ion exchanger in the phosphorus ion exchange reactor 5 is an anion exchange resin, EBCT=30min, adopts 5 groups of phosphorus ion exchange column...
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