Method for resource utilization of domestic garbage

A domestic garbage and recycling technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of uneven garbage, poor stability, and substandard strength of building materials, etc., and achieve light weight and compression resistance The effect of stable strength, improved strength and anti-seepage performance

Inactive Publication Date: 2014-04-16
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There have been a small amount of related research at home and abroad, but because the garbage is uneven and contains a lar

Method used

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  • Method for resource utilization of domestic garbage
  • Method for resource utilization of domestic garbage
  • Method for resource utilization of domestic garbage

Examples

Experimental program
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Embodiment 1

[0019] In this embodiment, 5000g of household garbage is weighed, passed through a 5mm sieve after the household garbage is squeezed by a double-roller pulverizer, and the moisture content in the household garbage particles under the sieve is measured by the drying method to be 23.8%, and the pH is 7.8 by the glass electrode method. . Fill the domestic waste particles into the anaerobic fermentation tank. Since the composition of the domestic waste is relatively uniform, white rot fungi, bacillus, staphylococcus and pantoea agglomerans are mixed evenly in a volume ratio of 1:1:1:1, and the concentration of each bacterial agent is 10 10 cfu / ml, the mixed liquid bacterial agent was added to the domestic waste particles at a mass ratio of 1:10 (bacterial agent: domestic waste), and mixed evenly, the ambient temperature was adjusted to 30°C, and the fermentation was carried out for 5 days, during which biogas was collected every day. The fermented domestic waste particles are tak...

Embodiment 2

[0023] In this embodiment, 5000g of household garbage is weighed, passed through a 5mm sieve after being squeezed by a double-roller pulverizer, and the moisture content in the household garbage particles under the sieve is measured by the drying method to 18.3%, and the moisture content is adjusted to 24.7% by adding tap water. %, the pH of domestic waste particles measured by the glass electrode method was 7.2. Fill the domestic waste particles into the anaerobic fermentation tank. Due to the high content of organic matter in the domestic waste particles and no lignin, Bacillus, Staphylococcus and Pantoea agglomerans were mixed evenly at a volume ratio of 3:1:2, and the concentration of each bacterial agent was 10 10 cfu / ml, the mixed liquid bacterial agent was added to the domestic waste particles at a mass ratio of 1:20 (bacterial agent: domestic waste), and mixed evenly, the ambient temperature was adjusted to 40°C, and the fermentation was carried out for 6 days, during ...

Embodiment 3

[0028] In this embodiment, 5000g of household garbage is weighed, passed through a 5mm sieve after being squeezed by a double-roller pulverizer, and the moisture content in the household garbage particles under the sieve is measured by the drying method to be 21.4%, and the household garbage particles are measured by the glass electrode method. The pH is 6.6, and 0.01mol / L NaOH solution is used to adjust the pH of domestic waste particles to 8.3. Fill the domestic waste into the anaerobic fermentation tank. Since the organic matter content of the domestic waste accounts for more than 90%, the bacillus inoculum is added to the domestic waste particles at a mass ratio of 1:15 (bacteria: domestic waste) and mixed evenly. The concentration of the bacillus inoculum is 10 10 cfu / ml, adjust the ambient temperature to 50°C, ferment for 7 days, and collect biogas every day during the period. The fermented domestic waste particles are taken out, and the leachate in the domestic waste p...

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Abstract

The invention relates to a method for resource utilization of domestic garbage. The method comprises the following steps of crushing the domestic garbage and sifting the crushed domestic garbage with a 5mm sieve; adjusting the moisture content of sifted domestic garbage particulate matters in the range of 20%-25% and the pH value in the range of 7-9; adding a microbial inoculum consisting one or more of white rot fungi, bacillus, staphylococcus or pantoea agglomerans to the domestic garbage particulate matters; and fermenting for 5-7 days in an anaerobic environment at 30-50 DEG C; adding 15%-20% of granite stone powder, 10%-15% of cement to 70% of the fermented domestic garbage particulate matters according to the mass ratio; mixing and stirring for 5-10min; carrying out compaction-molding in a grinding tool under the action of 1MPa; and maintaining for 28 days at the temperature of 20 +/- 2 DEG C and at the humidity of 95% to obtain a domestic garbage building material. The material achieves the purpose of resource utilization of the domestic garbage and the granite stone powder and has the characteristics of high strength, light weight, slight pollution, low price and convenience in preparation.

Description

technical field [0001] The invention relates to a domestic garbage treatment and resource recovery method. Background technique [0002] The annual output of domestic waste in cities and towns in my country exceeds 100 million tons, accounting for 26.5% of the world's total waste production, and is growing at a rate of 8%-9% every year; if the amount of waste in rural areas is added, the amount is even more astonishing. The next 30-50 years will be the peak period of my country's population and urbanization. Garbage will pose a severe challenge to my country's sustainable development. It is imperative to choose garbage disposal methods according to local conditions. [0003] At present, there are mainly four treatment methods for municipal solid waste widely used at home and abroad: sanitary landfill, incineration, composting and comprehensive utilization (recycling). Among them, the sanitary landfill method accounts for more than 70% of the total waste disposal, and the co...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00C04B28/00C04B18/30B28B3/02
CPCY02W30/91
Inventor 李江山薛强王平刘磊李振泽
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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