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

Biological treatment method for removing dissolved cadmium in water body

A biological treatment and dissolved state technology, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc., can solve problems such as high requirements and high growth dependence on photosynthesis

Active Publication Date: 2021-07-06
NANJING NORMAL UNIVERSITY
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, algae are photoautotrophic organisms, and their growth is highly dependent on photosynthesis, so they are greatly affected by environmental conditions such as water body temperature, pH, light intensity, and water quality. high

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
  • Biological treatment method for removing dissolved cadmium in water body
  • Biological treatment method for removing dissolved cadmium in water body
  • Biological treatment method for removing dissolved cadmium in water body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Experiments were carried out in 250 mL Erlenmeyer flasks containing 150 mL of sterile BG-11 medium. Prepare CdCl before experiment 2 Mother liquor (Cd mass concentration is 200mg L -1 ), by adjusting the volume of the mother liquor added to the Erlenmeyer flask to obtain 0, 0.15mg L -1 , 0.5mg L -1 , 0.9 mg L -1 , 1.6mg L -1 and 2.0mg L -1 Dissolved cadmium medium, followed by 5×10 4 cells mL -1 The initial density of brown flagellates was added to the Erlenmeyer flask, and three replicates were set up for each treatment. The experiment lasted 15 days, and the culture conditions were as above. The population growth of brown flagellates and the removal of dissolved cadmium in water during the observation period.

[0037]The results showed that with the increase of the initial cadmium concentration, the ability of brown flagellates to remove cadmium from water was enhanced ( figure 1 a), after 5 days, the removal amount of cadmium per unit cell brown flagellate ...

Embodiment 2

[0040] In order to meet the cadmium removal requirements of water bodies with different inorganic nutrient contents, in Example 2, the nutrient parameters affecting the ability of photoautotrophic brown flagellates to remove cadmium were studied. Before the experiment, brown flagellates were starved for 3 days in BG-11 medium without nitrogen and phosphorus, and then inoculated with different nitrogen (0.2 mg L -1 , 2mg L -1 and 8mg L -1 ) and phosphorus concentration (0.02mg L -1 , 0.4mg L -1 , 1mg L -1 , 2mg L -1 and 4mg L -1 ) medium for 2 weeks, different nitrogen and phosphorus concentrations were achieved by adjusting the contents of sodium nitrate and potassium dihydrogen phosphate added to the BG-11 medium. Set the initial concentration of cadmium in the water to 0.9mg L -1 , the initial cell density of brown flagellates was 5 × 10 4 mg L -1 , culture conditions as above. Observe the removal of dissolved cadmium in water by brown flagellates under different n...

Embodiment 3

[0043] This example verifies the ability of mixed trophic brown flagellates to remove cadmium. Brown flagellates containing 100mg L before the experiment -1 The glucose medium was acclimatized and cultured for two weeks, and the remaining glucose concentration in the medium was measured every day and added to 100mg L -1 . After the domestication culture is over, take brown flagellates in the logarithmic growth phase and carry out the verification experiment. The experiment is carried out in an Erlenmeyer flask containing 150mL of medium. Refer to Example 1 to set 0mg L in the culture system. -1 , 0.2mg L -1 , 0.6mg L -1 , 1.0mgL -1 , 1.9 mg L -1 and 2.4mg L -1 The concentration of cadmium in the water body, then 5×10 4 cells mL -1 The initial density of brown flagellates was inoculated, and the glucose concentration in the culture system was detected every 12 hours during the experiment and added to 100mg L -1 level, and other culture conditions as above. Observe the...

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 biological treatment method for removing dissolved cadmium in a water body. According to the method, flagellates are selected and have high endurance capacity and enrichment capacity on heavy metal cadmium, on the premise that dissolved cadmium in the water body is effectively adsorbed and enriched, rapid population growth can be achieved in a photoautotrophy or mixed nutrition mode, and therefore the removal capacity on the dissolved cadmium is further improved. On the basis of the core method, key technical parameters are improved and optimized aiming at the implementation of a technology for removing cadmium by utilizing flagellates with different nutrition modes, so that the application of the method in various water with different quality is facilitated. On the basis of safely and efficiently removing dissolved cadmium in the water body, the problems of secondary pollution and the like caused by a traditional cadmium removal method and the defect that other biological cadmium removal methods have high requirements on the environment can be effectively avoided.

Description

technical field [0001] The invention relates to a biological treatment method for removing dissolved cadmium in water, specifically based on the strong tolerance and enrichment ability of brown flagellates to cadmium, so as to remove dissolved cadmium in water, and belongs to the field of biotechnology. Background technique [0002] Due to the irrational development and utilization of natural resources by humans and the environmental damage caused by industrial and agricultural production, environmental pollution caused by heavy metals has become increasingly serious. Cadmium (Cd) is a heavy metal ubiquitous in water bodies. It not only has a toxic effect on aquatic environment organisms, but also directly or indirectly harms humans. How to safely and effectively remove cadmium pollution in water is very important. [0003] Traditional methods for treating heavy metal pollution in water include chemical precipitation, physical methods, redox methods, etc. These methods can ...

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): C02F3/32C02F101/20
CPCC02F3/32C02F2101/20Y02W10/10
Inventor 黄园马理理孙运菲张露杨州
Owner NANJING NORMAL UNIVERSITY
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