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

A method of using polycaprolactone and ceramsite to strengthen denitrification in constructed wetlands

A technology of polycaprolactone and constructed wetland, which is applied in the field of water treatment, can solve the problems of unstable effluent quality, harm to the indigenous microorganisms in the receiving water body, etc., and achieve the effect of stabilizing the microbial population

Active Publication Date: 2019-01-04
JIANGNAN UNIV
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the actual treatment of surface water, the introduction of additional microbial flora will cause instability in the quality of the effluent and the risk of harming the indigenous microorganisms of the receiving water.

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 method of using polycaprolactone and ceramsite to strengthen denitrification in constructed wetlands
  • A method of using polycaprolactone and ceramsite to strengthen denitrification in constructed wetlands
  • A method of using polycaprolactone and ceramsite to strengthen denitrification in constructed wetlands

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 Influence of different proportions of PCL and ceramsite layer on denitrification effect and DOC in constructed wetland

[0035] Acclimatization: A small filter column in the laboratory is used to simulate the carbon source layer of the constructed wetland. In four 1500mL cylindrical plexiglass columns, the matrix obtained by blending ceramsite and polycaprolactone (PCL) at a mass ratio of 0, 1:5, 1:2, and 1:1 was respectively added, which were recorded as the experimental group 1 (PCL), experimental group 2 (PCL+20% ceramsite), experimental group 3 (PCL+50% ceramsite) and experimental group 4 (PCL+100% ceramsite). And added with 30.00mg / L NO 3 - -N and 6.00mg / L PO 4 3- -P 1000mL of surface water. After sealing, put it into a constant temperature incubator at 25°C for reaction. Given that ceramsite for NO 3 - The inertness of -N adsorption, and the pertinence of the experimental conditions (simulating the actual in-situ treatment, without shaking, and n...

Embodiment 2

[0045] The simulated vertical subsurface flow constructed wetland is divided into water inlet area, filter area and water outlet area from top to bottom. The water inlet area is connected to the water inlet pipe, and the filter area is filled with ceramsite, ceramsite and polycaprolactone mixed filter media from top to bottom. , Ceramsite, the outlet area is connected to the outlet pipe. The simulated artificial wetland is made of plexiglass, with an inner diameter of 10cm and a total height of 100cm. The reactor is divided into 5 layers in total. From bottom to top, there are 5cm pebble layer, 20cm ceramsite layer, 15cm ceramsite and polycaprolactone mixed layer, 20cm ceramsite layer and 20cm water collection layer. The total volume of the reactor is 2.34 L.

[0046] The main pollutant in surface water is NH 4 + -N, NO 3 - -N, NO 2 - -N, TOC, the concentration of each pollutant is 0-1.45mg / L, 0-30.00mg / L, 0-0.40mg / L, 0-7.2mg / L respectively.

[0047] 1. Experimental se...

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 method for intensifying constructed wetland denitrification by using polycaprolactone and ceramsite, and belongs to the technical field of water treatment. According to the method, polycaprolactone and ceramsite are mixed as a filtering medium for denitrification nitrogen removal of a surface water body of a vertical subsurface flow constructed wetland. Polycaprolactone can be used as a denitrification solid carbon source and microorganism growth carrier, no external carbon source for denitrification nitrogen removal is needed, and compared with a conventional technique, the method is good in treatment effect and simple and convenient to operate.

Description

technical field [0001] The invention relates to a method for using polycaprolactone and ceramsite to strengthen artificial wetland denitrification, and belongs to the technical field of water treatment. Background technique [0002] With the rapid development of industry and agriculture and the improvement of people's living standards, nitrate nitrogen (NO 3 - -N) pollution is becoming more and more serious, and its harm to the human body is mainly caused by conversion into nitrite and nitrosamine. At present, biological methods are usually used to remove nitrate nitrogen from surface water. In the case of sufficient carbon sources, NO 3 - -N is finally reduced to nitrogen gas and nitrogen is completely removed from the water. However, the surface water in my country's cities is usually characterized by low dissolved organic carbon (DOC) and high nutrient salts, so the lack of carbon sources has become the main contradiction in the biological treatment of surface water d...

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): C02F3/32C02F3/28
CPCC02F3/2806C02F3/32C02F2101/16
Inventor 缪恒锋朱潇伟阮文权
Owner JIANGNAN 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