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

Method for rapidly measuring ammonia nitrogen content of biogas fluid

A technology for rapid determination of ammonia nitrogen content, which is applied in the preparation of test samples, material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials. The problem of high measurement results is to achieve the effect of no interference factors, simple experimental principle, and low detection cost.

Active Publication Date: 2017-07-28
CHENGDU ACAD OF AGRI & FORESTRY SCI
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, distillation and titration are used for the determination of ammonia nitrogen content in high-concentration ammonia-containing wastewater, but because the ammonia-nitrogen content measured by this method is low, repeated dilution is required for the determination of high-concentration ammonia-containing wastewater, which is not only cumbersome and time-consuming, but also in The dilution process will bring large errors; when pre-distilling some wastewater samples with alkali, there will be a lot of foam, bumping, etc., resulting in distillation failure
If the water sample contains substances that can be distilled out under this condition and can react with acid during titration, such as volatile amines, etc., the measurement result will be high and the detection result will be inaccurate

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
  • Method for rapidly measuring ammonia nitrogen content of biogas fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0030] [Example 2] Sampling points were set and sampled in the upper, middle and lower layers of No. Ⅱ biogas pond respectively. There were 3 sampling points in each layer, and the volume of biogas slurry sampled at each sampling point was 200ml. All the obtained samples were mixed and filtered with a 150-mesh filter, and diluted 40 times to obtain 72L of the test solution. Heat the solution to be tested to 60 degrees Celsius, add 720mg of PAC, and gradually add 267mg of CTS under stirring. After three minutes, large flocs and clear supernatant appear in the solution. Use pH test paper to measure the pH of the supernatant to 6. Get the supernatant and drop it on the ammonia nitrogen detection test paper with a formaldehyde concentration of 71%, and obtain a pH of 5 after the reaction at the titration place.

Embodiment 3

[0031] [Example 3] Divide No. Ⅲ biogas pond into five height layers on average in the vertical direction, set two sampling points in each layer, and the volume of biogas slurry sampled at each sampling point is 200ml. All the obtained samples were mixed and filtered with a 200-mesh filter, and diluted 50 times to obtain 100L of the test solution. Heat the solution to be tested to 65 degrees Celsius, add 1.5g of PAC, and gradually add 0.5g of CTS under stirring. After a little more than one minute, large flocs and clear supernatant will appear in the solution. Use ph test paper to measure the concentration of the supernatant. pH is 6.5. Get the supernatant and drop it on the ammonia nitrogen detection test paper with a formaldehyde concentration of 78%, and obtain a pH of 5 after the reaction at the titration place.

Embodiment 4

[0032] [Example 4] Sampling points were set and sampled in the upper, middle and lower layers of No. IV marsh pond respectively. There were 3 sampling points in each layer, and the volume of biogas slurry sampled at each sampling point was 200ml. All the obtained samples were mixed and filtered with a 150-mesh filter, and diluted 40 times to obtain 72L of the test solution. Heat the solution to be tested to 60 degrees Celsius, add 720mgPAC, and gradually add 267mgCTS under stirring. After three minutes, large flocs and a clear supernatant appear in the solution. The pH of the supernatant is 7 when measured with pH test paper. Get the supernatant and drop it on the ammonia nitrogen detection test paper with a formaldehyde concentration of 71%, and obtain a pH of 6 after the reaction at the titration place.

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 rapidly measuring the ammonia nitrogen content of biogas fluid. The method comprises the pretreatment steps of sampling, filtering, diluting and the like, and comprises the following steps: heating to-be-measured liquid to 55 to 65 DEG C, adding 10 to 20 g of polyaluminium chloride (PAC) in per cube of to-be-measured liquid, and gradually adding chitosan (CTS) into the to-be-measured liquid under stirring until large floc and clear supernatant occur in the to-be-measured liquid; and dropping the supernatant into ammonia nitrogen detection test paper with the formaldehyde concentration being 71 to 78 percent, and measuring the ammonia nitrogen concentration through the concentration of hydrogen ions generated by reaction. The method has the advantages of high reaction speed, low detection cost and easiness in learning and mastering, and is suitable for rapid measurement of the ammonia nitrogen content of the biogas fluid in the actual production.

Description

technical field [0001] The invention relates to the technical field of quick detection of biogas slurry, in particular to a method for rapidly measuring ammonia nitrogen content in biogas slurry. Background technique [0002] Biogas slurry is a "biological pesticide" that is pollution-free, non-toxic, and drug-resistant. Experiments have shown that biogas slurry can prevent and control 23 diseases and 14 pests in 13 crops, including grain, cash crops, vegetables, and fruits. Biogas slurry contains a variety of active substances, such as amino acids, trace elements, plant growth hormones, B vitamins and certain antibiotics. Among them, butyric acid in organic acids and gibberellin, indole acetic acid and vitamin B12 in plant hormones have obvious inhibitory effects on pathogens, and ammonia and ammonium salts in biogas slurry have direct effects on some crop diseases and insect pests. In actual agricultural production, it is necessary to detect the relative content of ammoni...

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
IPC IPC(8): G01N21/80G01N1/34G01N1/44
CPCG01N1/34G01N1/44G01N21/80
Inventor 樊战辉孙家宾陈光年彭朝晖
Owner CHENGDU ACAD OF AGRI & FORESTRY SCI
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