High-organic matter formula nutritive soil and preparation method thereof

A technology of organic matter and nutritious soil, applied in botany equipment and methods, organic fertilizers, planting substrates, etc., can solve the problems of large volume of domestic sludge, low resource utilization value, low social acceptance, etc., and promote the disposal work , Realize the recycling of resources and the effect of sustained release of fertilizer effect

Inactive Publication Date: 2020-07-03
BEIJING DRAINAGE GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the above problems, to provide a kind of harmless and highly stabilized high-organic-matter formula nutrient soil produced by urban domestic sludge, and to solve the problems of large domestic sludge volume, difficult disposal and resource utilization in cities. Technical issues with low value and low social recognition can be applied to many fields such as urban landscaping, forest land conservation, mine restoration, and land improvement

Method used

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  • High-organic matter formula nutritive soil and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method for producing high-organic formula nutrient soil using urban domestic sludge. The sludge comes from the sludge treatment center of the Gaobeidian Reclaimed Water Plant in Chaoyang District, Beijing.

[0040] (1) After collecting the sludge produced by the urban domestic sewage plant, it first enters the thermal hydrolysis treatment system: the sludge enters the slurry tank through the sealed pipeline to quench and temper, until the solid content of the sludge is 16wt%; in the reaction tank Keep the temperature at 165-170℃ and react at 6bar high pressure for 30min, then flash to release the pressure and cool to 45℃ under normal pressure. The killing rate of pathogenic bacteria in this process reaches 99.9%, and the sludge is harmless.

[0041] (2) After the thermal hydrolysis of the sludge is completed, the solid content of the obtained sludge is adjusted to 10wt%, and then pumped to the anaerobic digestion reactor for anaerobic digestion at 40°C for 24 ...

Embodiment 2

[0052] The difference from Example 1 is:

[0053] The ingredient weight ratio of the high organic matter formula nutrient soil includes: 60 wt% of sludge product, 30 wt% of potassium humate, 5 wt% of ammonium sulfate, and 5 wt% of bentonite, which are uniformly mixed. The quality reaches moisture content ≤50%, particle size 3-6mm, organic matter 47.5%, total nitrogen, phosphorus and potassium nutrients 9.54% (of which, total nitrogen 3.07%, total phosphorus 2.30%, total potassium 4.17%).

Embodiment 3

[0055] The difference from Example 1 is:

[0056] The ingredient weight ratio of the high organic matter formula nutrient soil includes: 80% by weight of sludge product, 15% by weight of humic acid, and 5% by weight of ammonium sulfate, which are uniformly mixed. The quality reaches moisture content ≤50%, particle size 3-6mm, organic matter 47.6%, total nitrogen, phosphorus and potassium nutrients 8.01% (of which, total nitrogen 3.98%, total phosphorus 3.76%, and total potassium 0.27%).

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Abstract

The invention discloses high-organic matter formula nutritive soil and a preparation method thereof. The raw materials of the high-organic matter formula nutritive soil consist of 55-80wt% of sludge products, and 20-45wt% of auxiliary materials, wherein the auxiliary materials are selected from at least one of humic acid, potassium humate, ammonium sulfate, diammonium phosphate, potassium sulphateand a granular reinforcer. The high-organic matter formula nutritive soil realizes harmless, stable and decreased treatment of living sludge in cities and towns, the treatment process is performed insealed facility, sludge treatment products are harmless and high in stability, and through combination with a traditional agriculture organic fertilizer granulation method, high-organic matter formula nutritive soil products are produced. The high-organic matter formula nutritive soil products have the advantage of being high in organic matter content, and through cooperation of nutrient elementsof nitrogen, phosphorus, potassium and the like, the high-organic matter formula nutritive soil is balanced in nutrients and slow-release and durable in fertilizer effects, has the effects of improving fertility and improving soil on the soil, and has positive improvement effects on growth of plants.

Description

Technical field [0001] The invention belongs to the technical field of resource utilization of urban domestic sludge and soil fertilizer, and more specifically relates to a high-organic formula nutrient soil and a preparation method thereof. Background technique [0002] In recent years, with the development of society and the increasing environmental protection requirements, the number of domestic urban sewage treatment plants and sewage treatment facilities have been increasing, upgrading and upgrading, and the output of sludge has been increasing. According to statistics from the Ministry of Housing and Urban-Rural Development, as of the end of 2018, there were 4,332 urban sewage treatment plants nationwide, producing nearly 70 million tons of urban domestic sludge (with a moisture content of 80%) each year, which is increasing year by year. How to carry out sludge treatment and disposal work more effectively, safely and sustainably has always been the focus of social environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G24/20A01G24/10C05G3/00C05G3/80C05G5/12
CPCA01G24/10A01G24/20C05C3/00C05D1/02C05F7/00C05F11/02C05D9/00
Inventor 崔超马富亮杨英杰熊建军曹贺雄白子征
Owner BEIJING DRAINAGE GRP CO LTD
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