Unlock instant, AI-driven research and patent intelligence for your innovation.

Novel composite carbon source used for denitrification, and preparation method and applications thereof

A compound carbon source and denitrification technology, applied in chemical instruments and methods, anaerobic digestion treatment, water pollutants, etc., can solve the problem that straw pyrolysis residue cannot be utilized as a resource, so as to reduce the amount of organic matter and improve Efficiency, the effect of reducing difficulty

Active Publication Date: 2019-10-22
JIANGSU NJU ENVIRONMENTAL TECH
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the problem in the prior art that the pyrolysis residue of crop straws produced in the process of producing bio-oil cannot be utilized as a resource, the present invention uses the pyrolysis residue of crop straws as raw material and uses electrodialysis and distillation to separate And recover low-molecular organic matter in the pyrolysis residue, prepare high-efficiency composite denitrification carbon source, and solve the problem of resource recovery and utilization of crop straw pyrolysis residue

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
  • Novel composite carbon source used for denitrification, and preparation method and applications thereof
  • Novel composite carbon source used for denitrification, and preparation method and applications thereof
  • Novel composite carbon source used for denitrification, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]A company uses crop straws to prepare high-quality fuel oil, adopts a combined process of rapid pyrolysis + hydrogenation catalysis, and the process wastewater produced is mainly pyrolysis liquid residue. The main components of the pyrolysis liquid residue are: 82% water, 6.0% methanol , 5% acetic acid, 1.5% ethanol, 0.2% butanol, 0.25% acetone, 3% esters, 1% inorganic salts.

[0039] figure 1 It is a flow chart of the preparation process of the novel composite carbon source of the present invention, and the specific steps of the preparation method are as follows:

[0040] 1) Perform microfiltration treatment on 100L of crop straw pyrolysis residue, and control the water production rate of the microfiltration membrane at 85%; the water produced by the microfiltration membrane enters the electrodialysis treatment system;

[0041] 2) The water produced by the microfiltration membrane enters the electrodialysis treatment system, 2% sodium sulfate is used as the polar liqui...

Embodiment 2

[0046] The agricultural stalks used in this project are cassava stalks and corn stalks. In the process of preparing high-quality bio-oil, pyrolysis liquid residue process wastewater is produced. The main components of the pyrolysis liquid are: 92% water, 4% methanol, 6% acetic acid, 1.8% ethanol, 0.5% butanol, 0.05%-0.6% acetone, 0.65% esters, 1.1% inorganic salts.

[0047] The preparation method of the novel composite carbon source for denitrification of the present invention comprises the following steps:

[0048] 1) Perform microfiltration treatment on 50L of crop straw pyrolysis residue, control the water production rate of the microfiltration membrane at 95%, and the water produced by the microfiltration membrane enters the electrodialysis treatment system;

[0049] 2) The water produced by the microfiltration membrane enters the electrodialysis treatment system, 2% sodium sulfate is used as the polar liquid chamber, and the volume ratio of the solution volume of the fres...

Embodiment 3

[0053] The agricultural stalks used in this project are corn stalks, wheat stalks, and soybean stalks. High-quality bio-oil is prepared by a combined process of rapid pyrolysis + hydrogenation catalysis. The main components of the pyrolysis liquid residue produced during the production process are: 88% water, 4.5% methanol, 3% acetic acid, 2.5% ethanol, 0.35% butanol, 0.25% acetone, 0.35% esters, 1.1% inorganic salts.

[0054] The preparation method of the novel composite carbon source for denitrification of the present invention comprises the following steps:

[0055] 1) Microfiltration treatment is performed on 10L of crop straw pyrolysis residue, and the water production rate of the microfiltration membrane is controlled at 90%; the water produced by the microfiltration membrane enters the electrodialysis treatment system;

[0056] 2) The water produced by the microfiltration membrane enters the electrodialysis treatment system. 2% sodium sulfate is used as the polar liquid...

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 novel composite carbon source used for denitrification, and a preparation method and applications thereof, and belongs to the technical field of sewage processing. The preparation method comprises following steps: 1, crop straw pyrolysis raffinate is introduced into an electrodialysis processing system to obtain electrodialysis concentrated water and electrodialysis freshwater; 2, electrodialysis fresh water is introduced into a underpressure distillation system for distillation processing to obtain condensate liquid and evaporation raffinate, the evaporation raffinate is subjected to a next stage underpressure distillation processing to obtain multistage distillation condensate liquid; 3, the multistage distillation condensate liquid and the electrodialysis concentrated water are mixed at a certain weight ratio, an alkali solution is added to adjust the pH value to prepare the carbon source used for denitrification. According to the preparation method, electrodialysis and distillation are adopted for separation and recycling of organic matters in pyrolysis raffinate, and the composite carbon source used for denitrification is prepared. Compared with theprior art in which sodium acetate is taken as a carbon source under the same conditions, the advantages of the composite carbon source are that: denitrification nitrogen removal efficiency is increased obviously, adding amount is reduced obviously, and investment cost is saved obviously.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a novel composite carbon source for denitrification, a preparation method and an application. Background technique [0002] In recent years, with the development of my country's rural economy and the increase of farmers' income, the energy consumption structure of rural residents is undergoing significant changes, and commercial energy such as coal, oil, gas, and electricity has been widely used. A large amount of straw remains, causing a series of environmental problems. In order to solve the energy crisis and environmental problems, the full conversion and utilization of straw energy has important practical significance for solving agricultural, energy and environmental problems. With the development and maturity of biomass pyrolysis technology, the use of agricultural and forestry waste to produce bio-oil fuel has become a reality, and many countries have...

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 Applications(China)
IPC IPC(8): C02F3/28C02F101/16
CPCC02F3/28C02F2101/16
Inventor 汪林张炜铭吕振华牛志华高亚娟唐凯
Owner JIANGSU NJU ENVIRONMENTAL TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com