Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for reclaiming nutrient elements in hydrothermal liquidation waste water and equipment for using nutrient elements

A technology of hydrothermal liquefaction and nutrient elements, applied in sterilization methods, chemical instruments and methods, and microorganism-based methods, etc., can solve problems such as incomplete degradation of pollutants

Active Publication Date: 2015-09-23
CHINA AGRI UNIV
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Photosynthetic bacteria are a large group of microorganisms that are similar to microalgae and have two sets of energy synthesis and transformation systems. They can survive under light or aerobic conditions, and have a wide range of utilization of organic matter, high tolerance to organic loads, and flexible metabolic mechanisms. However, its degradation of pollutants is not complete

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 reclaiming nutrient elements in hydrothermal liquidation waste water and equipment for using nutrient elements

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this example, the treated hydrothermal liquefaction wastewater had an initial COD of 195,600 mg / L, a TN concentration of 11,900 mg / L, a TP concentration of 1,240 mg / L, and a pH of 12.6.

[0037] like figure 1 , the equipment for comprehensive treatment of hydrothermal liquefaction wastewater includes: photosynthetic bacteria incubator 4, microalgae incubator 5, photosynthetic bacteria filter unit, microalgae filter unit, air intake unit;

[0038] The photosynthetic bacteria incubator 4 is a cylindrical light-transmitting plexiglass container, which is provided with a waste water inlet 1 and a water outlet 2. The bottom of the photosynthetic bacteria incubator 4 is provided with an aeration pan 3 for feeding air, and the aeration pan 3 is connected with the air. Gas line 15 is connected. The wastewater inlet 1 is set at a distance of 15-20 cm from the bottom of the incubator, and the water outlet 2 is set at a position slightly higher than the aeration pan (1.5-2 cm ...

Embodiment 2

[0050] In this example, the initial and diluted properties of the treated hydrothermal liquefaction wastewater are the same as in Example 1, and the same equipment as in Example 1 is used, and the comprehensive treatment steps are as follows:

[0051] 1. Through the water pump, pump the hydrothermal liquefaction waste water, dilution water and photosynthetic bacteria liquid from the water inlet 1 to the photosynthetic bacteria incubator 4, control the total volume of the three liquids to be about 2 / 3 of the photosynthetic bacteria incubator 4, and the photosynthetic bacteria incubator 4 The bacterial inoculation amount is 0.25g / L dry weight, and the pH value in the wastewater is adjusted to 7.0;

[0052] Two, open the air compressor 14, open the air pressure control valve, adjust the rotameter 9, make the air enter the photosynthetic bacteria incubator 4 through the air intake pipeline 15, the aeration disc 3, and the photosynthetic bacteria in the waste water are mixed and con...

Embodiment 3

[0062] In this example, the initial and diluted properties of the treated hydrothermal liquefaction wastewater are the same as in Example 1, and the same equipment as in Example 2 is used, and the comprehensive treatment steps are as follows:

[0063] 1. Through the water pump, pump the hydrothermal liquefaction waste water, dilution water and photosynthetic bacteria liquid from the water inlet 1 to the photosynthetic bacteria incubator 4, control the total volume of the three liquids to be about 2 / 3 of the photosynthetic bacteria incubator 4, and the photosynthetic bacteria incubator 4 The bacterial inoculation amount is 0.30g / L dry weight, and the pH value in the wastewater is adjusted to 7.0;

[0064] Two, open the air compressor 14, open the air pressure control valve, adjust the rotameter 9, make the air enter the photosynthetic bacteria incubator 4 through the air intake pipeline 15, the aeration disc 3, and the photosynthetic bacteria in the waste water are mixed and con...

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

PropertyMeasurementUnit
chemical oxygen demand (mass)aaaaaaaaaa
concentrationaaaaaaaaaa
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for reclaiming and using nutrient elements in hydrothermal liquidation waste water. The method comprises the following steps that (1) the waste water which is generated by making biological crude oil by a hydrothermal liquidation method is diluted by water until the concentration of COD (chemical oxygen demand) is 18,000 to 20,000mg / L; (2) a photosynthetic bacterium is inoculated into the waste water to culture; (3) after being cultured for 11 to 13 days, the waste water is separated by an ultra-filtration membrane; (4) microalgae are inoculated in the separated water, at daytime, CO2 and air-mixed gas are filled into the water to continuously culture for 6 to 8 days. The method of combining the photosynthetic bacterium and the microalgae to reclaim the nutrient elements in the hydrothermal liquidation waste water and reclaim a water resource is provided for the first time, the current gap of treating the hydrothermal liquidation waste water is solved, organics, nitrogen and phosphorus in the waste water can be degraded and reclaimed, biomass materials can also be produced to be applied to hydrothermal liquidation to produce crude oil, meanwhile, the reclaimed water can serve as the dilution water for the primary hydrothermal liquidation waste water, and the functions of protecting environment, reclaiming the organics and the water resource, and producing biomasses are realized.

Description

technical field [0001] The invention belongs to the field of waste water treatment and recycling, and in particular relates to a method and equipment for treating waste water with microorganisms. Background technique [0002] Hydrothermal liquefaction wastewater is wastewater generated during the process of converting microalgae, kitchen waste, and pig manure into bio-crude oil by thermochemical methods. The wastewater is rich in constant elements such as carbon, nitrogen, and phosphorus, and phenols, polycyclic aromatic hydrocarbons, The new type of toxic and harmful wastewater has complex components. Among them COD, TN, NH 3 -N, TP can be as high as 200000, 14000, 8000, 2000mg / L respectively. At present, there is no mature treatment technology and method for hydrothermal liquefaction wastewater, and the research on the treatment of this wastewater is still in the pilot stage. Due to the high concentration of pollutants in wastewater and a large number of toxic and harmf...

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): C02F9/14C12N1/20C12N1/12C12M1/12C12M1/04C12M1/00C12R1/01
Inventor 卢海凤袁国洋黄仕伟张源辉李保明赵煜
Owner CHINA AGRI 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
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