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

Method for rapidly restoring smooth operation of completely autotrophic nitrogen removal over nitrite process

A technology of full autotrophic denitrification and rapid recovery, which is applied in the field of rapid recovery and stable operation of the full autotrophic denitrification process, which can solve the problems of unstable operation and poor total nitrogen removal effect of the full autotrophic denitrification process, and achieve stable performance , Good denitrification effect

Active Publication Date: 2018-06-05
CHINA PETROLEUM & CHEM CORP +1
View PDF12 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of unstable operation and poor total nitrogen removal effect of the existing whole-process autotrophic denitrification process, the present invention provides a method for quickly restoring stable operation of the full-process autotrophic denitrification process

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for rapidly restoring smooth operation of completely autotrophic nitrogen removal over nitrite process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] After the entire autotrophic denitrification process for treating a certain oil refinery wastewater was successfully started, the system was shocked because the dissolved oxygen was not well controlled during the operation. After the treatment, the total nitrogen concentration of the effluent reached 45mg / L, of which the ammonia nitrogen concentration reached 42mg / L. According to the MLSS after adding 1000mg / L, add the cultivated whole-process autotrophic denitrification flocculent sludge. At the same time, add the microbial growth promoter D1 according to the concentration of the accelerator in the culture system at 10mg / L every day. After 5 days, the total nitrogen will be discharged. When the concentration is lower than 15mg / L, the system returns to normal.

Embodiment 2

[0031] After the whole-process autotrophic denitrification process for treating a certain oil refinery wastewater was successfully started, the temperature was not well controlled during the operation, and the system had a shock. After treatment, the total nitrogen concentration of the effluent reached 40mg / L, of which the nitrate nitrogen concentration reached 38mg / L. According to the MLSS after adding 800mg / L, add the cultivated whole-process autotrophic denitrification flocculent sludge. At the same time, add the microbial growth promoter C1 according to the concentration of the accelerator in the culture system at 20mg / L every day. After 7 days, the total effluent is If the nitrogen concentration is lower than 15mg / L, the system returns to normal.

Embodiment 3

[0033] After the whole-process autotrophic denitrification process for treating a certain oil refinery wastewater was successfully started, the system was shocked due to the failure of dissolved oxygen control during operation. After treatment, the total nitrogen concentration of the effluent reached 35mg / L, of which the ammonia nitrogen concentration reached 32mg / L. According to the MLSS after adding 600mg / L, add the cultivated whole-process autotrophic denitrification flocculent sludge. At the same time, add the microbial growth promoter D2 according to the concentration of the accelerator in the culture system at 10mg / L, and the total nitrogen will be discharged after 4 days When the concentration is lower than 15mg / L, the system returns to normal.

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 rapidly restoring the smooth operation of a completely autotrophic nitrogen removal over nitrite process. When the total nitrogen concentration of the effluent ofa system is greater than 40 mg / L and NO<x><->-N is used as a main component, denitrification sludge and a microbial growth promoter C are fed to rapidly restore the smooth operation of the process, wherein the microbial growth promoter C comprises a metal salt, a polyamine substance, inorganic acid hydroxylamine and Na<2>SO<3>, and the metal salt is a calcium salt, a copper salt, a magnesium salt, and / or a ferrous salt; and when the total nitrogen concentration of the effluent of the system is greater than 40 mg / L and NH<4><+>-N is used as a main component, denitrification sludge and a microbial growth promoter D are fed to rapidly restore the smooth operation of the process, wherein the microbial growth promoter D comprises a metal salt, a polyamine substance, inorganic acid hydroxylamine and Na<2>SO<3>, and the metal salt is composed of a calcium salt, a copper salt, a magnesium salt, and / or a ferrous salt. The method realizes rapid restoration of the smooth operation of an impactedsystem by feeding the denitrification sludge and utilizing the synergism of the promoters according to the impact state of a completely autotrophic nitrogen removal over nitrite system.

Description

Technical field [0001] The invention belongs to the technical field of wastewater treatment, and specifically relates to a method for a full-process autotrophic denitrification process to quickly restore stable operation. Background technique [0002] The anaerobic ammonia oxidation phenomenon discovered since the 1990s provides a new idea for the biological denitrification treatment of high-concentration ammonia-containing wastewater. The Dokhaven Sewage Treatment Plant in Rotterdam, The Netherlands, Strass Sewage Treatment Plant in Austria, Salzburg Sewage Treatment Plant, Glarnerland Sewage Treatment Plant in Switzerland, and Washington DC Sewage Treatment Plant in the United States have all implemented the anaerobic ammonia oxidation technology. The domestic Tongliao Meihua Group in 2009 The world's largest anaerobic ammonia oxidation reactor was built using the technology of the Dutch company Parker. my country has built a number of application examples for wastewater from ...

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): C02F3/30C02F101/16
CPCC02F3/30C02F2101/16C02F2305/06
Inventor 高会杰孙丹凤郭志华赵胜楠陈明翔
Owner CHINA PETROLEUM & CHEM CORP