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

A post-denitrification operation method based on mbbr

A post-denitrification and operation method technology, which is applied in the field of post-denitrification operation based on MBBR, can solve the problems of toxic and harmful substances, accumulation of toxic and harmful substances, deterioration of biofilm on fillers, etc., to avoid microbial inactivation , strong tolerance, long-lasting effect

Active Publication Date: 2017-03-29
QINGDAO SPRING WATER TREATMENT
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (3) Accumulation of toxic and harmful substances. Some toxic and harmful substances in the influent will be gradually enriched in the microbial cells. The front-stage reactor, especially the first stage, is more likely to be affected by toxic and harmful substances in the influent. After a period of operation, The biofilm on the filler deteriorates and the treatment effect decreases

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 post-denitrification operation method based on mbbr

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The winter secondary effluent of a certain urban sewage treatment plant is used as the influent water, with a water volume of 0.8m 3 / h, water temperature 10-14°C, average pH 6.90, nitrate nitrogen concentration in water 30-40mg / L, hardness 300-350mg CaCO 3 / L. Single reactor volume 1.44m 3 , a total of two reactors are arranged in series, which are respectively the first reactor R1 and the third reactor R3. The specific surface area of ​​the suspended filler used is 620m 2 / m 3 , the filling rate is 50%, and the specific gravity before filming is 0.95. Sodium acetate is added to the influent to supplement the carbon source required for denitrification.

[0033] When the operation started, the operation sequence was not adjusted, and the influent water flowed through the reactors R1 and R3 in sequence. 30 days after the operation started, the average load of the reactor R1 was 0.50kgN / (m 3 d), the average load of reactor R3 is 0.10kgN / (m 3d) The average TN concen...

Embodiment 2

[0035] The secondary effluent of a sewage treatment plant in summer is used as the influent, with a water volume of 1.2m 3 / h, water temperature 22-28°C, average pH 6.97, nitrate nitrogen concentration in water 60-65mg / L, hardness 300-350mg CaCO 3 / L. Single reactor volume 1.44m 3 , a total of three reactors are arranged in series, namely the first reactor R1, the second reactor R2, and the third reactor R3. The specific surface area of ​​the suspended filler used is 800m 2 / m 3 , the filling rate is 40%, the specific gravity before the film is 0.95, and sodium acetate is added to the influent water to supplement the carbon source required for denitrification;

[0036] At the beginning of operation, the order of water flow is R1, R2, R3. After 22 days of operation, the filling film is mature, and the beginning of 8 days is a cycle, and the operation sequence is adjusted every cycle. The order of water flow in each cycle is R1. , R2, R3, R3, R1, R2, R2, R3, R1, and then re...

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 MBBR-based post-mounted denitrification device and an operation method, which solve the problems in the existing MBBR denitrification process, such as easy calcification and precipitation of fillers, low substrate concentration in the rear stage restricting microbial growth, accumulation of toxic and harmful substances, and the like. The device is composed of 2‑4 MBBR reactors R1, R2, R3, and R4 in series. Anoxic denitrification treats the effluent of the secondary reactor, and the adjustment of the influent in the reaction is determined according to the amount of nitrate nitrogen degraded per unit reactor volume. When the hardness in sewage is 120-300mgCaCO3 / L, adjust the running sequence every time 1.0-3.0kgN / m3 is degraded; when the hardness in sewage is 300-480mgCaCO3 / L, every time 0.8 ‑1.5kgN / m3, adjust the operation sequence once; when the hardness in sewage is ≥480mg CaCO3 / L, adjust the operation sequence once for every degradation of 0.5‑1.0kgN / m3. Under the premise of high volume load, the present invention can still maintain effluent TN≤10mg / L, and has strong continuity and good stability.

Description

technical field [0001] The invention belongs to the field of sewage denitrification and denitrification treatment, and in particular relates to a post-denitrification operation method based on MBBR. Background technique [0002] In order to strengthen the protection of the water environment, the country has put forward higher requirements for the quality of effluent from sewage treatment plants, from Class B (TN<20mg / L) to Class A (TN<15mg / L), and then to some places Standard (TN<10mg / L), the next stage may be further restricted to TN<5mg / L. In the existing process system, the biochemical section often cannot achieve TN compliance, and subsequent advanced treatment is needed to meet higher water discharge requirements, especially for TN water discharge requirements. [0003] Based on this demand, a large number of denitrification advanced treatment technologies have emerged, and the MBBR process is one of them. MBBR (Moving Bed Biofilm Reactor, moving bed biofi...

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): C02F3/28C02F101/16
Inventor 郑志佳吴迪王存峰张晶晶于振滨
Owner QINGDAO SPRING WATER TREATMENT
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