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Poultry excrement hydrothermal treatment dewatering method

A technology for hydrothermal treatment and manure, applied in water/sludge/sewage treatment, sludge treatment, oxidation treatment of sludge, etc., can solve the problems of high moisture content of fresh poultry manure, unfavorable transportation and final disposal, etc., to achieve large-scale convenience The effect of chemical industry production, easy operation and simple process

Inactive Publication Date: 2019-02-12
HUNAN AGRICULTURAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a hydrothermal treatment dehydration method for poultry manure with high solid recovery rate, high degree of dehydration, low energy consumption and low cost in view of the fact that the high moisture content of fresh poultry manure is not conducive to subsequent transportation and final disposal

Method used

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  • Poultry excrement hydrothermal treatment dewatering method
  • Poultry excrement hydrothermal treatment dewatering method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] a. add hydrogen peroxide solution in fresh chicken manure (initial moisture content is 83%), the amount that adds described hydrogen peroxide is 0.15mol in the dry basis of every kilogram of described chicken manure, stirs, and adds to In the hydrothermal reaction device, the temperature was adjusted to 110°C, and the reaction was fully performed for 30 minutes.

[0033] b. Add water to the reacted chicken manure in step a, adjust the water content to 90%, mix and stir evenly.

[0034] c. Dehydrating the chicken manure obtained after step b through a plate and frame filter press to complete the treatment of fresh chicken manure. The filter cloth of the plate and frame filter press has a pore size of 30 μm.

[0035] The capillary water absorption time of the fresh chicken manure before the treatment in this embodiment was 1536.3s, and the antibiotic content was 152.33mg / kg. The capillary water absorption time of the chicken manure treated in step a is 96.3s, the moistur...

Embodiment 2

[0037]a. add potassium persulfate solution in fresh duck manure (initial moisture content is 81%), the amount that adds described potassium persulfate in every kilogram of described duck manure dry basis is 0.20mol, stirs then, and adds to In the hydrothermal reaction device, adjust the temperature to 130°C and fully react for 50 minutes.

[0038] b. Add water to the reacted duck manure in step a, adjust the water content to 92%, mix and stir evenly.

[0039] c. Dehydrating the duck manure obtained after step b through a plate and frame filter press to complete the treatment of fresh duck manure. The pore diameter of the filter cloth of the plate and frame filter press is 30 μm.

[0040] The tested capillary water absorption time of the fresh duck manure before the treatment in this embodiment is 1245.6s, and the antibiotic content is 183.66mg / kg. The capillary water absorption time of the duck manure treated in step a is 26.2s, the moisture content of the treated duck manure...

Embodiment 3

[0042] a. add sodium persulfate solution in fresh goose droppings (initial moisture content is 84%), the amount that adds described sodium persulfate in every kilogram of described goose droppings dry basis is 0.3mol, stirs then, and joins in In the hydrothermal reaction device, the temperature was adjusted to 150°C, and the reaction was fully performed for 60 minutes.

[0043] b. Add water to the reacted goose manure in step a, adjust the water content to 95%, mix and stir evenly.

[0044] c. The goose manure obtained after step b is dehydrated through a plate and frame filter press to complete the treatment of fresh goose manure. The pore diameter of the filter cloth of the plate and frame filter press is 40 μm.

[0045] The tested capillary water absorption time of the fresh goose droppings before the treatment in this example was 1358.1s, and the antibiotic content was 132.87mg / kg. The capillary water absorption time of the goose manure treated in step a is 14.1s. After t...

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Abstract

The invention provides a poultry excrement hydrothermal treatment dewatering method which comprises the following steps: adding an oxidizing agent into fresh poultry excrement, mixing and performing hydrothermal reaction treatment; mixing the treated poultry excrement with a proper amount of water, then dewatering to finish the treatment on the poultry excrement. The poultry excrement hydrothermaltreatment dewatering method can perform dewatering treatment on the poultry excrement and has the advantages that equipment is simple and easy to operate, a treating speed is quick, a period is short, a dewatering degree is high, a solid recovery rate is high, energy consumption is low, cost is low, and a wide application prospect is achieved.

Description

technical field [0001] The invention relates to the field of poultry manure treatment methods, in particular to a method for hydrothermal treatment and dehydration of poultry manure. Background technique [0002] In China, agricultural production produces about 3.2 billion tons of livestock and poultry manure every year, which is 3.2 times that of industrial solid waste (1 billion tons). A large amount of livestock and poultry manure has caused a series of environmental pollution. Phosphorus and nitrogen in fertilizers lead to eutrophication of water bodies and air pollution caused by the decomposition of nitrogenous compounds. In addition, groundwater can also be polluted by direct discharge and infiltration of manure. Livestock and poultry manure can be used as soil organic fertilizer to improve soil fertility and promote crop growth. However, some environmental concerns arise when they are applied to soil. For example, heavy metals in livestock manure can be toxic to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/06C02F11/122C02F101/30
CPCC02F11/06C02F11/122C02F2101/30
Inventor 肖智华伍清丹方俊郑晓晨刘芬刘壮壮梁运姗蒋红梅龙顺东
Owner HUNAN AGRICULTURAL UNIV
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