Unlock instant, AI-driven research and patent intelligence for your innovation.

Anaerobic ammonia oxidation denitrification treatment process for rare earth tail water

An anaerobic ammonium oxidation and treatment process technology, applied in the treatment of high ammonia nitrogen and low COD rare earth tail water to remove ammonia nitrogen and total nitrogen, rare earth tail water anaerobic ammonium oxidation denitrification treatment process, can solve the problem of poor impact resistance, denitrification Low nitrogen efficiency, high sludge yield and other problems, to achieve the effect of strong adaptability, flexible regulation and low operating cost

Pending Publication Date: 2021-02-26
江西省华赣环境集团有限公司 +3
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a rare earth tail water anaerobic ammonium oxidation denitrification process, which aims to solve the problems of low denitrification efficiency and energy consumption in the traditional nitrification and denitrification denitrification technology. Large, high operating costs, poor impact resistance, high sludge yield and other shortcomings, the process uses partial nitrification, precipitation separation, anammox The ammonia nitrogen and nitrite in the water are strictly controlled within a specific ratio range, realizing the effective removal of ammonia nitrogen and total nitrogen

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The rare earth tail water treated in this specific embodiment is high ammonia nitrogen rare earth tail water, its ammonia nitrogen concentration is 95-110mg / L, pH is 3.2-6.5, and COD is 10-30mg / L; control conditions in the denitrification process of this treatment , wherein, in the control part of the nitrification unit: DO is 0.3-1.2mg / L, HRT is 2-3h; in the control sedimentation tank: HRT is 2h; in the control anammox denitrification unit: DO≤0.5mg / L, The HRT is 3h, the reflux ratio R is 50%-125%, and the temperature T is 25-35°C.

[0036] The rare earth tail water pretreated by lowering the turbidity and adjusting the pH enters the partial nitrification unit of the integrated denitrification process for nitrification reaction, and adjusts the DO in the nitrification reaction zone to 0.5-0.8 mg / L, pH to 8.0-8.5, and HRT to 2.5- within 3 hours. When R=0, about (26±3)% of the ammonia nitrogen is converted into nitrite nitrogen, forming a nitrification mixture containin...

Embodiment 2

[0038] The rare earth tail water treated in this specific embodiment is high ammonia nitrogen rare earth tail water as raw water, its ammonia nitrogen concentration is 95-110mg / L, pH is 3.2-6.5, and COD is 10-30mg / L; in the denitrification process of this treatment Control conditions, among them, in the control part of the nitrification unit: DO is 0.2-1.2mg / L, HRT is 3-4h; in the control sedimentation tank: HRT is 2h; in the control anammox denitrification unit: DO≤0.5mg / L L, HRT is 3h, temperature T is 25-35°C.

[0039] Rare earth tail water pretreated by reducing turbidity and adjusting pH enters the partial nitrification unit of the denitrification process for nitrification reaction, and adjusts pH=8.0-8.5, R=75%-100%, and HRT=4h in the nitrification reaction zone. When DO=0.2-0.5mg / L, about (38±4)% of ammonia nitrogen is converted into nitrite nitrogen, forming a nitrification mixture containing ammonia nitrogen and nitrite nitrogen, which undergoes anaerobic ammonium oxi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an anaerobic ammonia oxidation denitrification treatment process for rare earth tail water, and aims to overcome the defects of low denitrification efficiency, high energy consumption, high operation cost, poor impact resistance, high sludge yield and the like in the traditional nitrification and denitrification technology at present. The process comprises the steps of firstly, feeding rare earth ammonia nitrogen tail water into a partial nitrification unit, and forming nitrification mixed solution containing ammonia nitrogen and nitrite; then feeding the nitrificationmixed solution into a sedimentation tank for mud-water separation to obtain a clarified mixed solution; removing nitrite nitrogen and ammonia nitrogen in the clarified mixed solution through an anaerobic ammonia oxidation denitrification reaction; and finally, refluxing part of the solution to the partial nitrification unit for circular treatment, and directly discharging the rest. According to the process, the rare earth ammonia nitrogen tail water is subjected to denitrification treatment integrating multiple functions of partial nitrification, precipitation separation and anaerobic ammoniaoxidation, ammonia nitrogen and nitrite in the effluent of the nitrification reaction tank do not need to be strictly controlled within a specific proportion range, and effective removal of ammonia nitrogen and total nitrogen is realized.

Description

technical field [0001] The invention belongs to the technical field of sewage biological denitrification treatment, and in particular relates to a rare earth tail water anaerobic ammonium oxidation denitrification treatment process, which is suitable for the removal of ammonia nitrogen and total nitrogen treatment from high ammonia nitrogen and low COD rare earth tail water. Background technique [0002] Rare earth resources are one of the important mineral resources in China. China is very rich in rare earth resources, and its industrial reserves rank first in the world. In addition to Baiyun Obo Rare Earth Paragenetic Mine in Inner Mongolia Autonomous Region and Gannan Ion Adsorption Mine, there are also monazite, xenotime, brown yttrium niobium ore, bastnasite and lanthanum ore in Guangdong, Guangxi, Jiangxi, Shandong, Hunan, Taiwan and other provinces and regions. Wait. [0003] Rare earth metals have extremely important uses and are an important part of contemporary hi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F9/14C02F101/16C02F103/10
CPCC02F9/00C02F1/66C02F1/52C02F3/2806C02F2101/166C02F2101/16C02F2103/10
Inventor 张树德宁小飞陈宏坤王占生杨忠平田智勇李亮杨宏苑尚华
Owner 江西省华赣环境集团有限公司