A method for rapidly preparing soil conditioner by using municipal sludge

The technology of soil conditioner and urban sludge is applied in the field of preparation of soil conditioner, which can solve the problems of being easily restricted by external conditions, large loss of organic matter, serious odor pollution, etc., so as to increase the utilization rate of nutrients and increase the heating speed. , the effect of complete fermentation

Active Publication Date: 2018-04-13
HUNAN HENGKAI ENVIRONMENT TECH INVESTMENT CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] ④ This method is easily restricted by external conditions
[0021] ④ This method is generally suitable for northern sludge because of its high organic matter content, but it is not suitable for southern sludge with low organic matter content
At present, the composting technology of sludge is developing rapidly, and a variety of new technologies that can improve the efficiency of sludge composting have emerged. With the deepening of research, the limitations of sludge composting technology and equipment have begun to appear: large footprint; composting The cycle is long; the odor pollution is serious; the loss of organic matter is large (aerobic respiration), and the loss reaches 60% to 70%; the composting process is greatly affected by the environment and climate, and the technical risk is large

Method used

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  • A method for rapidly preparing soil conditioner by using municipal sludge
  • A method for rapidly preparing soil conditioner by using municipal sludge
  • A method for rapidly preparing soil conditioner by using municipal sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The production process of using municipal sludge to quickly make soil conditioner is as follows: figure 1 shown.

[0058] Urban domestic sludge (75-85% water content), rice straw (2-5mm in length), livestock and poultry manure, heavy metal passivator (composed of zeolite and bentonite in a mass ratio of 2:1) and microbial agent (composed of White rot fungus, Bacillus licheniformis and Bacillus subtilis radiation-resistant (composed by quantity ratio 2:1:1) are mixed according to mass ratio 60:25:10:4.5:0.5, and enter the coulter mixer, and the mixing time is about 5 minutes. The mixed materials are sent into the multi-layer vertical mixed fermentation tower through the screw conveyor, and the pile height is kept at about 1.5m through the metering equipment, and the parameters in the fermentation process are adjusted to supply air and turn the pile to make the pile Fast fermentation. Among them, the ventilation volume in the fermentation tower is 0.2m 3 Air / min.m 3 F...

Embodiment 2

[0063] Control group: the operation steps are as in Example 1, except that different biological agents are used; the white rot fungus is marked as A, the Bacillus licheniformis is marked as B, and the radioresistant Bacillus subtilis is marked as C.

[0064] Table 2 adopts the control experiment group of different microbial bacterial agents

[0065]

[0066]

[0067] Note: The ratio of bacterial agents refers to the ratio of white rot fungi: Bacillus licheniformis: Bacillus subtilis radiation resistant.

[0068] It can be seen from Table 2 that the fermentation effect is optimal when the ratio of the three microorganisms is 2:1:1 through the ratio test of white rot fungi, Bacillus licheniformis and Bacillus subtilis.

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Abstract

The invention discloses a method for quickly preparing a soil conditioner with municipal sludge. The method includes uniformly mixing raw materials including domestic sludge, rice straw, livestock and poultry manure, heavy metal passivator and microorganism bacterium agent to obtain mixed material; subjecting the mixed material to high-temperatureaerobic fermentation with a multi-layer vertical mixing and turning fermentation tower to obtain fermented material; subjecting the fermented material to granulation prior to low-temperature drying to obtain the soil conditioner. With the method, stabilized, harmless, reducing and resourceful treatment of sludge is realized, sludge can be prepared into the soil conditioner capable of heightening soil quality and improving plant growth, preparation cost is low, the device is small in floor area, full-automatic control in process can be realized, and industrial production is facilitated.

Description

technical field [0001] The invention relates to a method for preparing a soil conditioner, in particular to a method for quickly making a soil conditioner from urban sludge, which realizes resource utilization, harmlessness and reduction of sludge, and belongs to sludge treatment and disposal technology field. Background technique [0002] In recent years, with the rapid development of my country's urbanization process, the number of urban population has continued to increase, and the output of domestic sludge has increased sharply. The outlet of a large amount of domestic sludge has become a major problem faced by many sewage treatment plants. [0003] At present, the sludge produced by domestic urban sewage treatment plants mainly has the following treatment and disposal processes: [0004] 1. Concentration + deep dehydration + landfill [0005] Process features: [0006] This process is the simplest and most direct sludge treatment process. Due to the addition of cond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/04C05G3/80
CPCC05D9/00C05G3/80C05F3/00C05F7/00C05F11/00C05F11/08C05F17/00C05G3/00
Inventor 冉启洋贺治国毛永强李贤邹先军
Owner HUNAN HENGKAI ENVIRONMENT TECH INVESTMENT CO LTD
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