Livestock and poultry manure anaerobic fermentation biogas residue biomass charcoal as well as preparation method and application thereof

A technology for anaerobic fermentation and livestock and poultry manure, applied in chemical instruments and methods, vaporization of by-products, and other chemical processes, can solve the problems of increased preparation costs and complicated preparation methods, and achieve low preparation costs and simple synthetic routes Effect

Inactive Publication Date: 2021-08-13
NANJING AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A variety of nitrogen-doped biochars have been developed for persulfate activation, but their preparation methods are complicated
In addition, the preparation of nitrogen-doped biochar usually requires the addition of external nitrogen sources (urea, melamine, ammonium chloride, etc.), which will undoubtedly increase the preparation cost and limit its large-scale production.

Method used

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  • Livestock and poultry manure anaerobic fermentation biogas residue biomass charcoal as well as preparation method and application thereof
  • Livestock and poultry manure anaerobic fermentation biogas residue biomass charcoal as well as preparation method and application thereof
  • Livestock and poultry manure anaerobic fermentation biogas residue biomass charcoal as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A synthetic route of cow dung biogas residue biochar, comprising the following steps:

[0033] (1) Dry the collected cow dung biogas residue at 60°C for 12 hours, and mechanically crush it into powder for later use;

[0034] (2) Take 4 parts of the powder obtained in step (1) and place them in the crucibles of samples labeled 1#-4# respectively. Take the 1# sample and put it in a muffle furnace at 500°C, and put the 2# sample into a muffle furnace at 600°C. In the Furnace, the 3# sample was placed in a 700°C muffle furnace, the 4# sample was placed in a 800°C muffle furnace, the heating rate of the muffle furnace was 10°C / min, and the 1#-4# samples were heated separately. solution for 2 hours;

[0035] (3) grinding the sample after step (2) pyrolysis into black powder after cooling down;

[0036] (4) Wash the sample obtained in step (3) repeatedly with distilled water to remove impurities therein and ensure that the solution pH=7;

[0037] (5) drying the sample obtai...

Embodiment 2

[0042] The biogas residue biochar prepared in Example 1 was used as the adsorbent of BPA. The experimental steps are as follows:

[0043] (1) Use a 100mL beaker as a reactor, add 50mL of 10mg / L BPA wastewater, and number 1#-4# reactors respectively.

[0044] In 1# reactor, add 1# sample in 10mg embodiment 1;

[0045] In 2# reactor, add 2# sample in 10mg embodiment 1;

[0046] In 3# reactor, add 3# sample in 10mg embodiment 1;

[0047] In 4# reactor, add 4# sample in 10mg embodiment 1.

[0048] Magnetic stirring (150 rpm) was performed respectively, and samples were taken at preset time intervals.

[0049] The concentration of remaining BPA was detected by high performance liquid chromatography, and the adsorption kinetic curve was drawn.

[0050] The biogas residue biochar prepared at different temperatures in Example 1 is to BPA adsorption kinetics result as follows figure 1 and figure 2 shown. Depend on figure 1 and figure 2 It can be seen that the adsorption capac...

Embodiment 3

[0052] The experimental steps and conditions are similar to those in Example 2. After the BPA adsorption reaches equilibrium, add 5mM of H to 1#-4# reactors respectively 2 o 2 , stirred and sampled.

[0053] Biogas residue biochar prepared at different temperatures in Example 1 activates H 2 o 2 The effect of degrading BPA-containing wastewater is as follows: image 3 shown. Such as image 3 As shown, the effect of biochar from biogas residue on H 2 o 2 The activation ability is weak. It is worth noting that biochar from biogas residues prepared at different pyrolysis temperatures activated H 2 o 2 The effect is different. Among them, DBC800 for H 2 o 2 has the strongest activation ability. It can be seen from the figure that DBC800 has the best removal effect on BPA, so follow-up research mainly focuses on DBC800.

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Abstract

The invention discloses a preparation method of livestock and poultry manure anaerobic fermentation biogas residue biomass charcoal. The preparation method comprises the following steps: (1) drying collected livestock and poultry manure anaerobic fermentation biogas residues to constant weight, and mechanically crushing the dried livestock and poultry manure anaerobic fermentation biogas residues into powder for later use; (2) placing the powder obtained in the step (1) in a furnace for pyrolysis, and conducting grinding after pyrolysis is completed to obtain black solid; (3) cleaning the powder ground in the step (2) in water until the powder is neutral, and conducting drying; and (4) grinding the powder dried in the step (3), and conducting sieving with a 100-mesh sieve to obtain the biogas residue biomass charcoal. The synthetic route is simple, the preparation cost is low, large-scale production can be achieved, and the prepared biogas residue biomass charcoal can effectively adsorb bisphenol A in water and activate persulfate to degrade bisphenol A.

Description

technical field [0001] The invention belongs to the technical field of biomass charcoal preparation and application, and in particular relates to biochar from biogas residues from anaerobic fermentation of livestock and poultry manure, a preparation method and application thereof. Background technique [0002] Bisphenol A (BPA) is one of the most widely used industrial chemicals as a raw material for the production of polycarbonate plastics, epoxy resins and phenolic resins. According to the U.S. Environmental Protection Agency, more than 1 million pounds of BPA are released into the environment each year. However, BPA is difficult to break down in the environment and can cause serious damage to the reproductive organs of living things. Therefore, it is urgent to develop a BPA treatment technology with high efficiency, low cost and no secondary pollution. [0003] Advanced Oxidation Process (AOPs) is a technology that can efficiently degrade refractory organic pollutants i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/00C10B57/10B01J20/20B01J20/30C02F11/10C02F103/20
CPCC10B53/00C10B57/10B01J20/20B01J20/3078C02F11/10C02F2103/20Y02W10/40
Inventor 丁大虎王子谦陈立伟蔡天明
Owner NANJING AGRICULTURAL UNIVERSITY
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