Biological denitrification method of refuse leachate
A technology for landfill leachate and biological denitrification, which is applied in the field of landfill leachate biological denitrification and waste incineration plant leachate biological denitrification, can solve the problems of large output of excess sludge, long residence time, and high capital investment costs, and achieves The effect of reducing excess sludge production and construction investment
Active Publication Date: 2018-07-20
JIANGNAN UNIV
View PDF2 Cites 11 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The whole process of nitrification and denitrification has the problems of high aeration energy consumption, large excess sludge output, large carbon source dosage, long residence time, and high infrastructure investment costs
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0021] The process inoculation sludge is taken from the nitrification sludge in the AO aerobic pool of the sewage treatment plant, and is inoculated in each unit of the process after dehydration by pressure filtration. The concentration ratio of total suspended solids (TSS) and volatile suspended solids (VSS) in the inoculation sludge If it is lower than 0.6, the amount of inoculated sludge shall be 5kgTSS / m 3 Dosing.
[0022] After the inoculation is completed, start the operation with continuous water inflow, control the hydraulic retention time to 6d, the temperature of the aerobic tank to 25-35°C, the sludge age to 15-20d, and the influent ammonia nitrogen load to 0.1-0.35kg NH 4 + -N / (m 3 d) Control the sludge concentration in the aerobic tank to 8-12g / L through the interception of the MBR membrane and the sludge return in the MBR tank, the dissolved oxygen concentration in the anoxic tank is 0.2-0.5mg / L, O1 and O2 in the aerobic tank The concentration of dissolved oxy...
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
| Property | Measurement | Unit |
|---|---|---|
| clearance rate | aaaaa | aaaaa |
Login to view more
Abstract
The invention discloses a biological denitrification method of refuse leachate, and belongs to the technical field of environment protection. A biological denitrification technology used after anaerobic digestion of leachate of a refuse incineration plant is improved, and leachate raw water is used as a supplementing carbon source, so that COD (Chemical Oxygen Demand), ammonia nitrogen and total nitrogen are efficiently and stably removed, and discharged water indexes reach connection pipe requirements of Water Quality Standards for Sewage Discharge to Municipal Sewers (CJ343-2010). The biological denitrification method comprises the following steps: a denitrification tank in a traditional nitrification and denitrification technology is changed into a UASB (Upflow Anaerobic Sludge Blanket)reactor with a steel structure; meanwhile, mechanical stirring or aeration stirring in the denitrification tank is cancelled, and hydraulic stirring is carried out by a sludge refluxing pump and a mixed solution refluxing pump for replacing the mechanical stirring or the aeration stirring; an aerobic tank is arranged into two sections; the accumulation of nitrite nitrogen is realized through front-section micro-aeration, and full oxidization of residual ammonia nitrogen is realized through rear-end strong aeration; an MBR (Membrane Bioreactor) membrane tank is independently arranged, and theinterception of sludge is realized by adopting a built-in type ultra-filtration membrane; nitrosobacteria and nitrobacteria are enriched, and efficient degradation of the ammonia nitrogen is realized.
Description
technical field [0001] The invention relates to a method for biological denitrification of landfill leachate, in particular to a method for biological denitrification of landfill leachate based on raw water of landfill leachate as an additional carbon source, and belongs to the technical field of environmental protection. Background technique [0002] In the existing landfill leachate biological denitrification process, the whole process of nitrification and denitrification is generally adopted. The leachate wastewater after anaerobic digestion passes through the denitrification tank, and the carbon source in the leachate wastewater is preferentially used for denitrification and denitrification; then it passes through the nitrification tank, and ammonia nitrogen is oxidized to nitrate nitrogen under the action of strong aeration, and nitrification The tank mixture is returned to the denitrification tank for denitrification and denitrification. The whole process of nitrifica...
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
Login to view more Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/16C02F103/06
CPCC02F3/1268C02F3/2846C02F3/302C02F2101/16C02F2103/06C02F2209/16
Inventor 王涛黄振兴阮文权
Owner JIANGNAN UNIV
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
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