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Method for preparing bioorganic fertilizer by using city life sludge

A technology for urban domestic sludge and bio-organic fertilizer, which is applied in the preparation of organic fertilizer, treatment of bio-organic parts, organic fertilizer, etc. And the effect of safe and clean production, avoiding secondary pollution and improving treatment efficiency

Active Publication Date: 2010-10-20
北京平安福生物技术研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the nutrient content is low, the volume is large; the labor rate is low, the labor intensity is high; the degree of harmlessness is low, the spread of germs is large, and the amount of organic fertilizer application is reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation of embodiment 1 anaerobic bacteria agent

[0031] The anaerobic bacteria agent used in the method of the present invention is the fermented liquid prepared by mixed culture of Lactobacillus acidophilus (Product No.: CGMCC 1.1854) and Saccharomyces cerevisiae (Commodity No.: CGMCC2.610). The color of the fermented liquid is brown, the total number of viable bacteria on the production date is 1.5 billion / mL, and it has a sweet and sour taste.

[0032] 1. Preparation of anaerobic starter by fermenting acidophilus lactic acid bacteria

[0033] In this example, Lactobacillus acidophilus (CGMCC 1.1854) was selected for fermentation, and the pH value could be reduced to about 3.6 within 48 hours.

[0034] Preparation method: 1000 parts by weight of water are dissolved into the following ingredients: 1 part by weight of brown sugar, 3 parts by weight of glucose, 0.1 part by weight of protein powder, 0.1 part by weight of ammonium citrate, 0.054 parts by weight ...

Embodiment 2

[0039] The preparation of embodiment 2 aerobic bacteria agent

[0040] The aerobic bacterial agent is Bacillus subtilis (product code: AS 1.936), adopts the common liquid submerged fermentation method, uses the nutrient gravy medium for the seed medium, and the fermentation production medium is soybean powder and starch as the main raw materials. Universal medium. Put the culture medium in a 30 cubic fermenter, the fermentation volume is 65% of the tank volume, autoclave at 121°C for 1.5 hours, cool to 37±1°C, inoculate the cultivated Bacillus subtilis seeds in the seed tank In the fermenter, the inoculum size was 5% of the fermentation volume. Aerated and fermented for 35 hours, the aeration ratio was 1:1.2. When the sporulation rate of the thalline is 90%, stop the fermentation, add the filter aid plate and frame press filter, the filter cake is dried by boiling drying, the spore content of the obtained bacterium powder is 800-1000CFU / gram, and the bacterium powder is used...

Embodiment 3

[0042] The sludge with a moisture content of about 80% is transported into the anaerobic fermentation workshop, and every cubic sludge is evenly sprayed with 1.5 liters of the anaerobic bacterial agent prepared in Example 1 to obtain a mixture 1, and then mix the mixture 1, crop stalk powder 1: 2.0 The volume ratio is evenly mixed, piled up for anaerobic fermentation, and fermented for 24 hours at a temperature above 20°C, and the sludge mixture is basically odorless.

[0043] The sludge mixture after anaerobic fermentation is added with fermentation auxiliary materials (bone meal, soybean meal powder, etc.) accounting for 20% of the total volume of the sludge mixture, and the moisture content is adjusted to 50% to obtain mixture 2; 600 grams of mixture 2 is inoculated per ton of Example 2 The prepared aerobic bacterial agent is stirred and mixed, and then enters the tank-type fermentation bin through a screw conveying hopper, and the height of the material is 80-100 cm. The t...

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Abstract

The invention discloses a method for preparing a bioorganic fertilizer by using city life sludge, comprising the following steps: (1) mixing an anaerobic zymophyte agent with sludge to obtain a material 1; (2) mixing the material 1 with organic raw material powder to carry out anaerobic fermentation; (3) adding fermented auxiliary materials to the product obtained by anaerobic fermentation, and regulating the water content to be 45-50wt% to obtain a material 2; (4) inoculating a high-temperature zymophyte agent to the material 2 to carry out high-temperature aerobic fermentation; and (5) crushing, granulating and drying to obtain the bioorganic fertilizer. The invention has the advantages that by using the method of the invention, the odor and peculiar smell of the sludge can be completely removed; the fermentation period is short; nutrients can be rapidly matured and pernicious microbes and parasite eggs can be thoroughly killed (a coliform value is reduced to below 30 MPN / 100gDM, and ascaris eggs are inactivated in hundred-percent); and the prepared bioorganic fertilizer product contains no more than 20% of water, no less than 40% of organic matters and no less than 4% of nitrogen phosphorus potassium, and the contents of heavy metals and other indexes all satisfy standard requirements.

Description

technical field [0001] The invention relates to a method for preparing organic fertilizers, in particular to a method for preparing bio-organic fertilizers from urban domestic sludge, and belongs to the field of bio-organic fertilizers. Background technique [0002] Sludge is a by-product of urban domestic sewage treatment. In recent years, with the continuous expansion of cities, the amount of dewatered sludge has also increased. How to deal with it has become a worldwide problem. After the sewage has been treated by various processes, and the effluent has reached the discharge standard stipulated by the state, the sludge generated during the sewage treatment process still contains a large amount of organic matter and rich nitrogen, phosphorus and other nutrients. If it is not stabilized, it will be discharged arbitrarily Into the water body, the organic matter, nitrogen and sulfur in the sludge will consume a large amount of oxygen in the water body, causing the deteriorat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F17/00C05F9/04C05F7/00
CPCY02A40/20Y02W30/40
Inventor 岳寿松殷汝新王颖
Owner 北京平安福生物技术研究所有限公司
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