Method for improving characteristics of marsh gas produced through anaerobic fermentation of chicken manure

Abstract

The invention discloses a method for improving the characteristics of marsh gas produced through anaerobic fermentation of chicken manure. The production of marsh gas is promoted through anaerobic fermentation of chicken manure by taking zeolite as an external source additive. According to the method, efficient and stable production of marsh gas by using chicken manure is realized, the method hasthe characteristics of large fermentation gas production rate, stable gas production and high content of methane in the produced gas, the problem that the system is easy to collapse, which is caused by ammonia nitrogen inhibition in the anaerobic digestion process of chicken manure, is solved, and theoretical foundation and data support are provided for energy and resource utilization of chicken manure.

Description

technical field

[0001] The invention relates to a method in the technical field of agricultural waste treatment, in particular to a method for improving the characteristics of biogas production by anaerobic fermentation of chicken manure by adding zeolite. Background technique

[0002] The number of large-scale chickens raised in the world has reached 20 billion, of which China accounts for 23%. According to the national pollution source census data, the discharge of ammonia nitrogen and chemical oxygen demand in the water pollutant discharge of the livestock and poultry breeding industry reached 2.30 times and 3.23 times the discharge of industrial sources in the year respectively. The rapid development of the breeding industry has provided a guarantee for the stable supply of livestock and poultry products in the market, but it has also brought more and more serious environmental problems. Therefore, seeking a way to utilize livestock and poultry manure as a resource has ...

Examples

Embodiment 1

[0030] This embodiment provides a method for improving the biogas characteristics of anaerobic fermentation of chicken manure, and the specific implementation steps are as follows:

[0031] (1) Sieve the chicken manure to remove impurities with a particle size greater than 1cm;

[0032] (2) Measure the VS (volatile solid) of the chicken manure raw material obtained in step (1), obtain the chicken manure VS as 13.44%, set the VS ratio of chicken manure and inoculation in the fermentation bottle to be 1:2, and work volume 400mL;

[0033] The zeolite is sieved, and the particle size is controlled at 1-1.5 mm. The zeolite was rinsed three times with deionized water, and placed in an oven at 105° C. for 24 hours after rinsing.

[0034] The inoculum in this example is activated sludge, which is taken from the fermentation residue of a biogas system normally fermented with pig manure as the fermentation raw material in Gangyan Town, Chongming Island, Shanghai, and its total solid co...

Embodiment 2

[0041] This embodiment provides a method for improving the biogas characteristics of anaerobic fermentation of chicken manure, and the specific implementation steps are as follows:

[0042] (1) Sieve the chicken manure to remove impurities with a particle size greater than 1cm;

[0043] (2) Measure the VS (volatile solid) of the chicken manure raw material obtained in step (1), obtain the chicken manure VS as 13.44%, set the VS ratio of chicken manure and inoculation in the fermentation bottle to be 1:2, and work volume 400mL;

[0044] Sieve the zeolite, the particle size of the zeolite is controlled at 1-1.5mm, and the specific surface area is greater than 13.71m 2 g -1, the hardness is between 3 and 4, and the main component is Na(AlSi 5 o 12 )·4H 2 O. The zeolite was rinsed three times with deionized water, and placed in an oven at 110° C. for 22 hours after rinsing.

[0045] The inoculum in this example is activated sludge, which is taken from the fermentation residu...

Embodiment 3

[0050] This embodiment provides a method for improving the biogas characteristics of anaerobic fermentation of chicken manure, and the specific implementation steps are as follows:

[0051] (1) Sieve the chicken manure to remove impurities with a particle size greater than 1cm;

[0052] (2) Measure the VS (volatile solid) of the chicken manure raw material obtained in step (1), obtain the chicken manure VS as 13.44%, set the VS ratio of chicken manure and inoculation in the fermentation bottle to be 1:2, and work volume 400mL;

[0053] Sieve the zeolite, the particle size of the zeolite is controlled at 1-1.5mm, and the specific surface area is greater than 13.71m 2 g -1 , the hardness is between 3 and 4, and the main component is Na(AlSi 5 o 12 )·4H 2 O. The zeolite was rinsed three times with deionized water, and placed in an oven at 100° C. for 20 hours after rinsing.

[0054] The inoculum in this example is activated sludge, which is taken from the fermentation resid...

technical field

[0001] The invention relates to a method in the technical field of agricultural waste treatment, in particular to a method for improving the characteristics of biogas production by anaerobic fermentation of chicken manure by adding zeolite. Background technique

[0002] The number of large-scale chickens raised in the world has reached 20 billion, of which China accounts for 23%. According to the national pollution source census data, the discharge of ammonia nitrogen and chemical oxygen demand in the water pollutant discharge of the livestock and poultry breeding industry reached 2.30 times and 3.23 times the discharge of industrial sources in the year respectively. The rapid development of the breeding industry has provided a guarantee for the stable supply of livestock and poultry products in the market, but it has also brought more and more serious environmental problems. Therefore, seeking a way to utilize livestock and poultry manure as a resource has ...

Examples

Embodiment 1

[0030] This embodiment provides a method for improving the biogas characteristics of anaerobic fermentation of chicken manure, and the specific implementation steps are as follows:

[0031] (1) Sieve the chicken manure to remove impurities with a particle size greater than 1cm;

[0032] (2) Measure the VS (volatile solid) of the chicken manure raw material obtained in step (1), obtain the chicken manure VS as 13.44%, set the VS ratio of chicken manure and inoculation in the fermentation bottle to be 1:2, and work volume 400mL;

[0033] The zeolite is sieved, and the particle size is controlled at 1-1.5 mm. The zeolite was rinsed three times with deionized water, and placed in an oven at 105° C. for 24 hours after rinsing.

[0034] The inoculum in this example is activated sludge, which is taken from the fermentation residue of a biogas system normally fermented with pig manure as the fermentation raw material in Gangyan Town, Chongming Island, Shanghai, and its total solid co...

Embodiment 2

[0041] This embodiment provides a method for improving the biogas characteristics of anaerobic fermentation of chicken manure, and the specific implementation steps are as follows:

[0042] (1) Sieve the chicken manure to remove impurities with a particle size greater than 1cm;

[0043] (2) Measure the VS (volatile solid) of the chicken manure raw material obtained in step (1), obtain the chicken manure VS as 13.44%, set the VS ratio of chicken manure and inoculation in the fermentation bottle to be 1:2, and work volume 400mL;

[0044] Sieve the zeolite, the particle size of the zeolite is controlled at 1-1.5mm, and the specific surface area is greater than 13.71m 2 g -1, the hardness is between 3 and 4, and the main component is Na(AlSi 5 o 12 )·4H 2 O. The zeolite was rinsed three times with deionized water, and placed in an oven at 110° C. for 22 hours after rinsing.

[0045] The inoculum in this example is activated sludge, which is taken from the fermentation residu...

Embodiment 3

[0050] This embodiment provides a method for improving the biogas characteristics of anaerobic fermentation of chicken manure, and the specific implementation steps are as follows:

[0051] (1) Sieve the chicken manure to remove impurities with a particle size greater than 1cm;

[0052] (2) Measure the VS (volatile solid) of the chicken manure raw material obtained in step (1), obtain the chicken manure VS as 13.44%, set the VS ratio of chicken manure and inoculation in the fermentation bottle to be 1:2, and work volume 400mL;

[0053] Sieve the zeolite, the particle size of the zeolite is controlled at 1-1.5mm, and the specific surface area is greater than 13.71m 2 g -1 , the hardness is between 3 and 4, and the main component is Na(AlSi 5 o 12 )·4H 2 O. The zeolite was rinsed three times with deionized water, and placed in an oven at 100° C. for 20 hours after rinsing.

[0054] The inoculum in this example is activated sludge, which is taken from the fermentation resid...