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Method for producing organic fertilizer by planting azolla filliculoidas in domestic sludge treated by ozone water

A technology for domestic sludge and ozone treatment, applied in the oxidation treatment of sludge, preparation of organic fertilizers, organic fertilizers, etc., can solve problems such as harm to human health and groundwater pollution, and achieve considerable benefits.

Inactive Publication Date: 2020-06-09
孙福江 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Untreated sludge is randomly piled up. After rain erosion and leakage, it will pollute groundwater and directly endanger human health.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for producing organic fertilizer by planting leaf-eating grass with domestic sludge after ozone treatment, comprising the following steps

[0026] (1) Treatment of domestic sludge: inject the domestic sludge dehydrated in the municipal sewage treatment plant into ozone water with a concentration of 30ppm, so that the ozone water and domestic sludge are fully mixed for 30 minutes; The mass ratio is 1:0.9. The treated sludge was tested to have a mortality rate of 100% of roundworm eggs and 1.6mpn / g of fecal coliform bacteria. It meets the requirements of "Agricultural Sludge Pollutant Control Standard GB4284-2018" and "Biological Organic Fertilizer Implementation Standard NY884-2012".

[0027] (2) Planting leaf-eating grass: spread the domestic sludge treated with ozone water in step (1) on the pre-arranged land, the laying thickness is about 1 meter; after leveling, cover it with a layer of 12cm thick Soil, then plant leaf-eating grass on it according to the c...

Embodiment 2

[0038] The steps of the method are basically the same as those in Example 1, except that in step (3), Saccharomyces cerevisiae is added to the straw pulp and then fermented and dehydrated according to conventional methods in the art to form a paste and then stored for a long time. The mass ratio to beneficial bacteria is 300:1

[0039] The paste was detected, and the results were as follows.

[0040] Table 3 Detection results of leaf-eating grass paste

[0041]

[0042] It can be seen from Table 3 that the organic fertilizer produced by the leaf-eating grass can completely meet the nutrients needed for the growth of crops.

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Abstract

The invention discloses a method for producing an organic fertilizer by planting azolla filliculoidas in domestic sludge treated by ozone treatment, which comprises the following steps: injecting domestic sludge subjected to dehydration treatment in a municipal sewage treatment plant into ozone water with the concentration of 20 ppm or above, and sufficiently mixing the ozone water with the domestic sludge for more than 15 minutes; paving the domestic sludge subjected to ozone water treatment on a land which is prepared in advance, wherein the paving thickness is 0.8-1.2 m; after leveling, covering a layer of soil with the thickness of 10-15cm on the soil, then planting the azolla filliculoidas by adopting a sowing or seedling planting mode according to a conventional method in the field,and harvesting when leaves of the azolla filliculoidas grow to be more than 30cm; smashing the harvested azolla filliculoidas and pulping, and using straw pulp as a soil improvement fertilizer, a cropabsorption fertilizer, a water flush fertilizer and a foliar fertilizer; or adding beneficial bacteria into the straw pulp, fermenting according to a conventional method in the field, dehydrating togenerate paste, and storing for a long time for reuse.

Description

technical field [0001] The invention relates to a method for producing organic fertilizer by planting leaf-eating grasses with ozone-treated domestic sludge, and then utilizing the characteristics of high potassium and high protein in leaf-eating grasses to produce organic fertilizers to realize the ultimate disposal of domestic sludge and provide A new method of organic fertilizer production. Background technique [0002] Sludge from urban sewage treatment plants not only has high water content, is easy to rot, and has a strong odor, but also contains a large number of pathogenic bacteria, parasite eggs, chromium, mercury and other heavy metals, and contains difficult-to-degrade organic matter and carcinogens. Untreated sludge is randomly piled up, and after rainwater erosion and leakage, it will pollute groundwater and directly endanger human health. [0003] Sludge pollution has become a new environmental problem in China and deserves attention. During the operation of ...

Claims

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Application Information

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IPC IPC(8): C02F11/06A01G22/15C05G3/80C05G5/18C05F17/00
CPCA01G22/15C02F11/06C05F11/00C05F17/00Y02W30/40
Inventor 孙福江王翠杰
Owner 孙福江
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