Nutrient medium special for urban domestic sludge greening and treating method thereof

A technology for urban domestic sludge and landscaping, which is applied in the field of special nutrient substrates for urban domestic sludge landscaping, can solve the problems of non-standardized treatment and disposal and the reduction of environmental benefits of sewage treatment facilities, and achieve low overall operating costs and increased The effects of seedling transplanting adaptability and low cost

Inactive Publication Date: 2017-06-13
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to incomplete statistics, at present, only a small part of the sludge from urban sewage treatment plants in the country is used for sanitary landfill, land utilization, incineration and building material utilization, while most of them have not been treated and disposed of in a standardized manner, which greatly reduces the environmental benefits of sewage treatment facilities.

Method used

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  • Nutrient medium special for urban domestic sludge greening and treating method thereof
  • Nutrient medium special for urban domestic sludge greening and treating method thereof
  • Nutrient medium special for urban domestic sludge greening and treating method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A nutritional substrate specially used for landscaping of urban domestic sludge, which includes main materials and auxiliary materials, wherein the main material is sludge, and the auxiliary materials are mushroom dregs, wheat husks, peat, vermiculite-perlite, and sand.

[0052] The volume fraction in the matrix includes: sludge 50%~58%, mushroom residue 23%~50%, peat 0~21%, vermiculite-perlite 0%~5%, sand 5%~20%.

[0053] Sludge is dewatered sludge from sewage treatment plant, and its water content is 15-25%.

[0054] The sludge has a water content of 57%, mushroom residue 28%, peat 10%, vermiculite-perlite 2.5%, and sand 6.7%.

[0055]The pH value of the matrix is ​​6.87~7.44.

[0056] The total porosity of the matrix is ​​≥60%.

[0057] The water-holding porosity in the matrix is ​​≥50%.

[0058] The ventilation porosity of the matrix is ​​≥10%.

Embodiment 2

[0060] A method for treating urban domestic sludge with a special nutrient substrate for landscaping, the specific steps are as follows:

[0061] (1) Material preparation, prepare mushroom residue, wheat husk, peat, vermiculite-perlite, sand;

[0062] (2) Sludge dehydration; dehydrate the sludge to ensure a moisture content of 15-25%;

[0063] (3) Mixing materials; sludge and mushroom dregs, wheat husks, and peat are mechanically pulverized and mixed.

[0064] (4) fermentation;

[0065] (5) Adding breeding waste, including breeding residues and maggot droppings;

[0066] (6) Add vermiculite-perlite, sand;

[0067] (7) Secondary fermentation;

[0068] (8) Add earthworm eggs, gradient-release compound live bacteria capsules, and slow-release fertilizer capsules;

[0069] (9) Packing.

[0070] The step (7) specifically includes the following steps:

[0071] In the first step, add the encapsulated pesticide composition, stir evenly, and carry out airtight anaerobic fermenta...

Embodiment 1-3

[0084] In combination with Examples 1-3, the present invention can adopt the method of using directly through the substrate, and can also adopt the substrate to be transplanted after being fermented. In this embodiment, the detection and experiment of the performance parameters of the matrix use the way of directly using the matrix.

[0085] Research Materials and Methods

[0086] 4.1 Test material

[0087] The main material for the test, dewatered sludge, was provided by Hangzhou Guotai Environmental Protection Technology Co., Ltd. According to the communication between the two parties, the needs of matrix formula research and development, in accordance with the principle of "waste resource utilization", low-cost agricultural production waste is preferred, combined with the physical properties of sludge, comprehensively considering the first phase of the test to select mushroom residues with high organic matter content , wheat husks, and peat are used to adjust the organic ...

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Abstract

The invention discloses a nutrient medium special for urban domestic sludge greening and a treating method thereof; the nutrient medium comprises a main material and auxiliary materials; the main material is sludge; the auxiliary materials include mushroom residue, wheat hull, peat, vermiculite-perlite, and sand, wherein by volume, the sludge accounts for 50-58%, the mushroom residue accounts for 23-50%, the peat accounts for 0-21%, and the vermiculite-perlite accounts for 0-5%. According to the nutrient medium special for urban domestic sludge greening and the treating method thereof provided herein, the treating method uses reduced volume and quantity, is stable and provides harmless treatment for urban domestic sludge; the treating method has low cost and good effect, provides high transplanting survival rate for garden greening plantlets, and has a promising market prospect.

Description

technical field [0001] The invention relates to the technical field of urban domestic sludge treatment, in particular to a nutritional substrate specially used for urban domestic sludge landscaping. Background technique [0002] The sludge produced by urban sewage treatment plants is a mixture of complex components: high water content (75%-99%), high organic matter content, perishable, strong odor, and its solid components are mainly organic debris, bacteria Bacteria, inorganic particles, colloids and agents used for flocculation, etc. Sludge contains organic matter, nitrogen (N), phosphorus (P), potassium (K) and various trace elements with potential utilization value, but also contains parasite eggs, pathogenic microorganisms and heavy metals such as copper, zinc, chromium and mercury As well as salts, polychlorinated biphenyls, dioxins, radionuclides and other toxic and harmful substances that are difficult to degrade, if they are not properly treated and discharged arbi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05F17/00A01G9/10
CPCA01G24/00C05D9/00C05F17/05C05F17/50C05G3/00C05F3/00C05F5/00C05F5/002C05F7/00C05F11/02C05F11/08Y02W30/40
Inventor 王云龙陈柏校喻曼苏瑶王成沈阿林景金富
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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