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

Method for biological nitrogen removal by adopting short-cut nitrification and denitrification

A short-range nitrification and biological denitrification technology, applied in the field of sewage denitrification, can solve the problems of low sludge utilization rate, complex process, high cost, etc., and achieve the effect of reducing the formation of nitrate

Active Publication Date: 2014-01-22
GRANTOP GRP CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional denitrification treatment process has the disadvantages of long treatment time, high cost, complicated process, and low utilization rate of sludge.

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

[0031] First place municipal domestic sludge in the aeration reaction tank, and then carry out continuous or intermittent treatment of aeration and water injection. The specific steps are as follows:

[0032] Under the conditions of normal temperature, normal pressure, and stirring speed of 150~180 rpm, inject domestic waste leachate into the aeration reaction tank where municipal domestic sludge has been placed, and simultaneously add methanol to the tank, and turn on the oxygenation equipment at the same time (Yixing Jiaolong Environmental Protection Machinery Co., Ltd. JDS vertical umbrella surface aerator 90~360kw / h) is adjusted to 190~360kw / h, and the concentration of dissolved oxygen (DO) is detected online;

[0033] When it is detected that the dissolved oxygen suddenly increases, that is, the dissolved oxygen concentration rises to 0.5~1mg / L within 10 minutes, and the dissolved oxygen concentration becomes unchanged after that, stop adding methanol and reduce the oxygen...

Embodiment 2

[0044] Same as Example 1, except that the amount of sludge in the aeration reaction tank accounts for 1 / 4 of the total volume of the aeration reaction tank. The aeration and stirring speed is 160 rev / min. When it is detected that the dissolved oxygen suddenly rises, that is, the dissolved oxygen concentration rises to 0.7mg / L within 10 minutes, and the dissolved oxygen concentration becomes unchanged after that, stop adding methanol and Reduce the regulation of oxygenation equipment to less than 120kw / h. when NO 2 -N, NO 3 -N, total nitrogen (TN) and / or NH 3 -N concentration unchanged and NO 2 -N: NO 3 When -N=8:2, the short-range nitrification and denitrification treatment process of leachate is completed.

Embodiment 3

[0046] Same as Example 1, except that the amount of sludge in the aeration reaction tank accounts for 1 / 3 of the total volume of the aeration reaction tank. The aeration and stirring speed is 170 rev / min. When it is detected that the dissolved oxygen suddenly rises, that is, the dissolved oxygen concentration rises to 0.9 mg / L within 10 minutes, and the dissolved oxygen concentration becomes unchanged after that, stop adding methanol and Reduce the regulation of oxygenation equipment to less than 100kw / h. when NO 2 -N, NO 3 -N, total nitrogen (TN) and / or NH 3 -N concentration unchanged and NO 2 -N: NO 3 When -N=6:1, the short-range nitrification and denitrification treatment process of leachate is completed.

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 relates to a method for biological nitrogen removal by adopting short-cut nitrification and denitrification, in particular to a short-cut nitrification and denitrification process for domestic garbage percolate. According to the method, urban domestic sludge is placed in an aeration reaction tank, and then, the continuous or intermittent treatment of aeration and water filling is carried out. Sludge obtained in the process is cyclically utilized, the generation of nitrate can be greatly reduced after the over aeration and water filling, the treatment period of the percolate can be shortened, in addition, the cost is low, the process is simple, the operation is easy, and the popularization and the application are convenient.

Description

technical field [0001] The invention relates to a treatment method for denitrification of sewage, in particular to a short-range nitrification and denitrification process for leachate of domestic garbage. Background technique [0002] Nowadays, landfill, incineration, and composting are the main means of urban waste, but with the continuous improvement of living standards, the amount of urban domestic waste is increasing day by day, and the problem of landfill leachate caused by waste disposal is even more difficult to solve in waste disposal , because these municipal solid waste leachate residues have high concentrations of organic pollutants, and direct discharge to natural water bodies will cause great harm. These hazards must be removed and the national discharge standards must be removed before they can be discharged to designated recipients. in a body of water. [0003] The traditional sewage denitrification treatment process is biological denitrification through nitr...

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): C02F9/14C02F101/16
Inventor 杨光兴张柳山童燕曾文辉戴文武黄龙辉车炳桓
Owner GRANTOP GRP CO LTD