Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Application of mannitol as additive in relieving salinity impact of anaerobic ammonia oxidation reactor

An anammox and reactor technology, which is applied in the directions of anaerobic digestion treatment, chemical instruments and methods, and adjustment methods of biological treatment, etc., can solve problems such as the inhibition of anammox bacteria activity, so as to alleviate the impact and improve the removal rate. effect, effect of mitigating adverse effects

Inactive Publication Date: 2020-04-17
NANJING UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: for the problems existing in the prior art, the present invention improves the denitrification performance of the anaerobic ammonium oxidation reactor under high-salt state by adding mannitol in the reactor, when entering the anaerobic ammonium oxidation reactor The salinity of wastewater is high, and the activity of anammox bacteria will be severely inhibited. Adding an appropriate amount of mannitol to the reactor can greatly slow down the reduction in the treatment effect of the anammox reactor under high salinity conditions, thereby restoring And improve the denitrification performance of the anammox reactor

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
  • Application of mannitol as additive in relieving salinity impact of anaerobic ammonia oxidation reactor
  • Application of mannitol as additive in relieving salinity impact of anaerobic ammonia oxidation reactor
  • Application of mannitol as additive in relieving salinity impact of anaerobic ammonia oxidation reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0016] Start-up of the anaerobic ammonium oxidation reactor (UASB): put anaerobic ammonium oxidation sludge into the sealed anammox reactor, and the anammox sludge is taken from a stable anammox reactor; The influent of the anaerobic ammonium oxidation reactor is synthetic wastewater, by adding (NH 4 ) 2 SO 4 and NaNO 2 Control NH in water 4 + -N and NO 2 - The molar ratio of -N is 1:1~1:1.32; the temperature of the reactor is controlled to 35°C through a constant temperature water tank, the dissolved oxygen DO is controlled to be 0~0.1mg / L, and the pH of the feed water is stabilized at 7.5~8.0; The average total nitrogen load of water is 0.2kgN m -3 d -1 , and the total nitrogen removal rate remains at about 70%, complete the start-up of the anammox reactor after one month of operation; the composition of influent (synthetic waste water)...

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 application of mannitol as an additive in relieving salinity impact of an anaerobic ammonia oxidation reactor. According to the invention, mannitol is added into the reactorto improve the denitrification performance of the anaerobic ammonia oxidation reactor in a high-salt state; when the salinity of wastewater entering the anaerobic ammonia oxidation reactor is relatively high, the activity of anaerobic ammonia oxidation bacteria is seriously inhibited, and at the moment, mannitol is added into the reactor, so that the problem that the anaerobic ammonia oxidation activity is inhibited under a high-salinity condition can be greatly alleviated, and the denitrification performance of the anaerobic ammonia oxidation reactor is recovered and improved.

Description

technical field [0001] The invention relates to the application of mannitol as an additive in alleviating the salinity impact of anaerobic ammonium oxidation reactors, and belongs to the technical field of high-salt wastewater treatment. Background technique [0002] High-salt wastewater mainly comes from food processing, pharmaceuticals, oil and gas processing, tanning, mustard pickling, and sewage directly discharged from seawater utilization in coastal areas. The continuous improvement of people's quality of life has also caused the discharge of high-salt wastewater to increase year by year. If these wastewater are directly discharged, the salinity of river water quality will increase, which will bring serious pollution to soil, surface water, and groundwater. ecosystem. Because high salinity will cause the osmotic pressure imbalance of microbial cells, it will damage the cell wall and enzyme system of microorganisms, which will lead to the reduction or death of microbia...

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): C02F3/28C02F101/16
CPCC02F3/28C02F3/006C02F2101/16
Inventor 黄开龙张徐祥薛昌叶林任洪强伍羽菲
Owner NANJING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com