Wastewater treatment device and wastewater treatment method for realizing deep wastewater denitrification based on sequencing batch type A/O (Anoxic/Oxic) linkage system
A linkage system, deep denitrification technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as many control parameters and complex operation procedures
Patent Information
- Authority / Receiving Office
- CN · China
- Current Assignee / Owner
- Publication Date
- 2014-10-22
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
technical field
[0001] The invention relates to a wastewater treatment device, in particular to a wastewater treatment device and method for realizing deep denitrification of wastewater based on a sequencing batch A / O linkage system. Background technique
[0002] With the aggravation of water eutrophication and water shortage, the current domestic and foreign sewage discharge standards are strictly controlled, especially the requirements for nitrogen and phosphorus discharge are getting higher and higher.
[0003] The most widely used biological denitrification method in existing sewage treatment is nitrification / denitrification technology, which is suitable for treating low-concentration urban domestic sewage. Among them, nitrification is mainly completed in two steps. First, NH 4 +-N is converted to NO under the action of ammonia nitrogen oxidizing bacteria (AOB) 2 --N, this step is called nitrite nitration; then NO 2 --N is converted to NO under the action of nitrite o...
Examples
Embodiment 1
[0077] Such as figure 1 As shown, a wastewater treatment device based on the sequencing batch A / O linkage system to realize the deep denitrification of wastewater is equipped with a regulating tank 1, SBR reaction tanks 2 and 3, an intermediate storage tank 4 and an MBR / MBBR reaction tank 5; Described SBR reaction tank 2,3 comprises SBR reaction tank anoxic zone 2 and SBR reaction tank aerobic zone 3;
[0078] The regulating tank 1 communicates with the anoxic zone 2 of the SBR reaction tank through the first water inlet pump 1.2 and the first liquid flow meter 1.1 in sequence;
[0079] The anoxic zone 2 of the SBR reaction tank communicates with the aerobic zone 3 of the SBR reaction tank through the overflow tank 2.4;
[0080] An aeration pipe 3.5 is provided at the bottom of the aerobic zone 3 of the SBR reaction tank; the aeration pipe 3.5 is connected to the aerator through a gas flow meter;
[0081] The bottom of the aerobic zone 3 of the SBR reaction tank communicates...
Embodiment 2
[0120] The wastewater treatment device based on the sequencing batch A / O linkage system of the present invention to realize the deep denitrification of wastewater, wherein the size of the regulating tank is B×H×L=470×500×440cm, and the total volume is 103,400L. The size of the anoxic zone of the SBR reaction tank is 470×500×440cm, and the effective volume is 100,000L; the size of the aerobic zone of the SBR reaction tank is 470×500×1540cm, and the effective volume is 300,000L; the size of the intermediate storage tank is 470×500 ×1540cm; the size of the MBR / MBBR reaction tank is 175×185×160cm, and the effective volume is 5,000L.
[0121] Take the landfill leachate from Xiaping Solid Waste Landfill in Shenzhen City, its pH is 8.01-8.65, NH 4 + -N concentration up to 1500~3000mg / L, BOD 5 / TN is less than 3 to 5, which is a typical waste water with high ammonia nitrogen concentration and low carbon nitrogen ratio.
[0122] (1) Start the nitrosation reaction:
[0123] 1) Injec...