A quick start-up method for short-cut nitrification and denitrification in wastewater treatment system

A wastewater treatment system and short-cut nitrification technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the complex cultivation process and limit the development and application of short-cut nitrification and denitrification processes, etc. problems, to achieve the effect of increasing the denitrification rate, solving the relatively large amount of bacterial agent dosage, and reducing the cost of cultivation

Active Publication Date: 2019-08-06
CHINA PETROLEUM & CHEM CORP +1
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This greatly limits the development and application of short-cut nitrification and denitrification technology.
CN201210130659.X discloses a quick start-up method for short-range nitrification and denitrification of ammonia-containing wastewater, which is characterized by enriched nitrifying bacteria and denitrifying bacteria with nitrous nitrogen as the nitrogen source, although the method realizes Quick start of short-cut nitrification, but because of the use of nitrifying bacteria and denitrifying bacteria, the two types of bacteria need to be cultured in different culture solutions before adding, and the cultivation process is complicated

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
  • A quick start-up method for short-cut nitrification and denitrification in wastewater treatment system
  • A quick start-up method for short-cut nitrification and denitrification in wastewater treatment system

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The preparation method of the microbial growth promoter of the present invention is as CN201410585417.9, CN201410585418.3, CN201410585482.1, CN201410585430.4, CN201410585449.9 and

[0029] Prepared by the method described in CN201410585485.5. The present invention prepares six types of microbial growth promoters according to different ratios and formulations, and the concentrations of the promoters are all 0.5g / L.

[0030] Table 1 Formula and ratio of accelerator

[0031]

[0032] The quick start method of short-range nitrification and denitrification of ammonia-containing wastewater proposed by the present invention is as follows:

[0033] (1) First inoculate the aerobic activated sludge of the wastewater treatment plant in the bioreactor, and the inoculation amount is 10%-50% of the volume of the treated wastewater. Add microbial growth accelerator A every day according to the concentration of the accelerator in the sewage 15mg / L, and start the short-range nitrif...

Embodiment 1

[0039] Use self-prepared wastewater with ammonia nitrogen concentration of 300mg / L and COD concentration of 800mg / L as the test water for short-range nitrification and denitrification start-up test of the reactor. During the start-up process, the pH is controlled at 7.9, the temperature is controlled at 20°C, 1.5-3.0mg / L, the mass ratio of carbon to nitrogen is 4:1. First, 20% of the treated wastewater volume is inoculated with activated sludge for adaptive domestication, and at the same time, microbial growth promoter A-I is added according to the concentration of the promoter in the sewage at 15mg / L every day to start the short-range nitrification and denitrification denitrification process. First run intermittently, stop ventilation after 24 hours of reaction, discharge the supernatant after natural settlement, leave activated sludge, and then fill the reactor with new ammonia-containing wastewater. When the removal rate of ammonia nitrogen is greater than 90%, increase the...

Embodiment 2

[0041] Use self-prepared wastewater with ammonia nitrogen concentration of 300mg / L and COD concentration of 800mg / L as the test water to conduct short-range nitrification and denitrification start-up test of the reactor. During the start-up process, the pH is controlled at 8.0, the temperature is controlled at 30°C, It is 1.5-3.0mg / L, and the mass ratio of carbon to nitrogen is 3:1. Firstly, 30% of the treated wastewater volume is inoculated with activated sludge for adaptive domestication, and at the same time, microbial growth promoter A-II is added according to the concentration of the promoter in the sewage at 20 mg / L every day to start the short-range nitrification and denitrification denitrification process. First run intermittently, stop ventilation after 24 hours of reaction, discharge the supernatant after natural settlement, leave activated sludge, and then fill the reactor with new ammonia-containing wastewater. When the removal rate of ammonia nitrogen is greater t...

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 a quick starting method of short-cut nitrification and denitrification of a wastewater treatment system. The method includes the following steps: (1) inoculating aerobic active sludge into a reactor and adding a growth accelerator A; (2) starting the system firstly in an intermittent water feeding manner and then in a continuous water feeding manner; (3) during intermittent operation, when concentration of suspensions in discharged water is lower than 100 mg / L, stopping addition of the growth accelerator A and adding denitrifying bacterial agent and a growth accelerator B; (4) when the ammonia nitrogen in inlet water reaches 400-700 mg / L and removal rate reaches more than 60% within 12 h, changing the operation into continuous water feeding, and adding the denitrifying bacterial agent and the growth accelerator B; and (5) when removal rate of total nitrogen reaches more than 70%, increasing the concentration of ammonia nitrogen until the ammonia nitrogen in inlet water reaches 500-1000 mg / L and the removal rate of total nitrogen reaches more than 80%, and at this time, completing the starting process. The method greatly reduces starting difficulty of short-cut nitrification and significantly reduces operation time, and ensures long-time stable operation of the reactor. The method has high treatment efficiency on wastewater, and can achieve simultaneous removal of ammonia nitrogen, total nitrogen and COD.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a quick start-up method for short-range nitrification and denitrification of a waste water treatment system. The method can realize quick start-up of the waste water treatment system and at the same time make the waste water meet the standard treatment. Background technique [0002] As an important research direction of water pollution control, biological denitrification of wastewater has undergone a process from mature traditional biological denitrification to new biological denitrification. The new biological denitrification process provides a feasible way for the treatment of low COD (chemical oxygen demand, an indicator of carbon source content, measured by Cr method) and high ammonia nitrogen wastewater. In particular, nitrosation biological denitrification technology has attracted widespread attention due to its advantages of reducing energy consum...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/34
Inventor 高会杰孙丹凤郭志华赵胜楠
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap