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Sludge biological drying conditioner and preparation method thereof

A technology of biological drying and conditioning agent, applied in the field of sludge resource utilization, can solve the problems of heat dissipation, short high temperature period, low oxygen utilization rate, etc., and achieve the goal of ensuring the growth environment, reducing heat loss, and promoting aerobic respiration Effect

Active Publication Date: 2021-09-21
HEFEI CEMENT RES DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, my country's sludge treatment is still in its infancy, and the safe and harmless disposal rate of sludge is still less than 30%. The disposal of sludge has become an urgent problem.
However, microorganisms have limited digestion and degradation of refractory substances in sludge such as macromolecular proteins, polysaccharides, cellulose, etc., and fail to make full use of the bioenergy in sludge, resulting in a short period of high temperature in the biological drying process
In addition, there are still bottleneck problems such as low oxygen utilization rate and heat dissipation in biological drying, which affect its market application

Method used

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Examples

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Effect test

preparation example Construction

[0024] The present invention also provides a preparation method of sludge biological drying conditioner, said method comprising the following steps:

[0025] (1) Crushing and grinding the biomass material to obtain a fine powder, then placing the fine powder in a tubular pyrolysis furnace, performing a pyrolysis reaction under anaerobic conditions, and obtaining a porous biochar material after the reaction;

[0026] (2) Take a certain amount of stearic acid, heat it up until it turns into a liquid state, then add a high-activity enzyme, stir and mix it, add it to a porous biochar material, cool to room temperature, and granulate it after vacuum drying to obtain the described stearic acid. Sludge biological drying conditioner.

[0027] Further, according to the method provided by the present invention, the biomass material is selected from one or more mixtures of sludge, rice husk, and corncob; the sludge is municipal sludge, and the water content is 60-90%. Municipal sludge ...

Embodiment 1

[0033] A preparation method of sludge biological drying conditioner, specifically comprising the following steps:

[0034] Take 200g of dry-based municipal sludge sample (dried at 105°C for 24h), after crushing and grinding, use a tubular pyrolysis furnace to raise the temperature to 900°C at a heating rate of 10°C / min, and perform a pyrolysis reaction for 30min. Exclude the air, and the nitrogen flow rate is 1.0L / (min·kg). After the reaction, the tube pyrolysis furnace was naturally cooled, and the sample was taken out for analysis. The specific surface area was 45.16m 2 / g.

[0035] Take 20g of stearic acid (analytical pure of Sinopharm Reagent), heat it up to 70°C to make it into a liquid state, add 0.8g of heat-resistant glycoproteinase (Sigma-Aldrich), stir it evenly, and add it to the porous biochar prepared before. Cool to room temperature, vacuum-dry and make particles with a particle size of 2 cm for use.

[0036] The conditioner was added to the biological drying ...

Embodiment 2

[0038] A preparation method of sludge biological drying conditioner, specifically comprising the following steps:

[0039]Take 200g of dry-based municipal sludge sample (dried at 105°C for 24 hours), after crushing and grinding, use a tubular pyrolysis furnace to raise the temperature to 900°C at a heating rate of 10°C / min, and perform a pyrolysis reaction for 60 minutes. Exclude the air, and the nitrogen flow rate is 1.0L / (min·kg). After the reaction, the tube pyrolysis furnace is naturally cooled, and the sample is analyzed, and its surface area is 51.88m 2 / g.

[0040] Take 20g of stearic acid (analytical pure of Sinopharm Reagent), heat it up to 70°C to make it into a liquid state, add 0.5g of heat-resistant protease (Sigma-Aldrich), stir it evenly, add it to the porous biochar prepared before, and cool to room temperature, vacuum-dried to produce particles with a particle size of 2.5 cm for use.

[0041] Add the conditioner to the biological drying system to treat muni...

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Abstract

The invention relates to the technical field of sludge recycling, and in particular, relates to a sludge biological drying conditioner and a preparation method thereof. The sludge biological drying conditioner comprises a porous biochar material and a high-activity enzyme, and the high-activity enzyme is loaded on the porous biochar material with stearic acid as a fixing agent; and the high-activity enzyme can directionally catalyze and degrade macromolecular degradation-resistant substances in sludge, and the phase transition temperature of the stearic acid is 65-75 DEG C. Stearic acid absorbing enough heat in the early stage is subjected to phase change in the middle and later stages of sludge biological drying high temperature, the high-activity enzyme is released to catalyze the macromolecular degradation-resistant substances, that is, the degradation-resistant substances are decomposed, organic matters are continuously provided for a biological drying system in which a large amount of simple organic matters are consumed, aerobic respiration of thermophilic bacteria is promoted, the growth environment of the sludge is guaranteed, and the high-temperature period of biological drying of the sludge is prolonged, so that the biological drying efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of sludge resource utilization, in particular to a sludge biological drying conditioner and a preparation method thereof. Background technique [0002] Sludge is a by-product of the sewage treatment process and is a heterogeneous body composed of biomass organic matter, a variety of inorganic substances, and a mixture of metal ions. According to the calculation of the Chinese Academy of Environmental Sciences, the total annual wastewater discharge in the country is about 150 billion tons, and the sludge generated is about 60 million tons per year. Sludge contains a large amount of organic pollutants, pathogenic microorganisms and heavy metal elements, causing serious pollution to the land and ecological environment, and threatening human health. At present, the sludge treatment in our country is still in the primary stage, and the safe and harmless disposal rate of sludge is still less than 30%. The disposa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/148C02F11/02C02F101/30C02F101/20
CPCC02F11/14C02F11/02C02F2101/30C02F2101/20
Inventor 朱兵张山李宁涂长江颜会才黄婷
Owner HEFEI CEMENT RES DESIGN INST
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