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
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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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