Method for preparing nutrient soil by taking sludge as raw material

Abstract

The invention relates to a method for preparing nutrient soil by taking sludge as a raw material. The method is characterized by comprising the following steps: (1) performing sludge pretreatment; (2)performing primary fermentation; (3) performing secondary fermentation; (4) sludge after-treatment; (5) proportioning nutrient soil; (6) obtaining the finished product. Due to the use of an ER BIO compound microorganism bacterium agent, fermentation is promoted, odor in the sludge is removed, oxygen supply is ensured, the yield is high, and the quality is excellent.

Description

technical field [0001] The invention relates to a method for preparing nutrient soil, in particular to a method for preparing nutrient soil by using sludge as a raw material. Background technique [0002] In recent years, with the deepening of the sustainable development strategy, people have paid more and more attention to the transformation and utilization of sludge. Practical methods such as incineration, carbonization, composting, and building materials have been adopted; at the same time, the existing soil resources in our country are getting worse due to environmental pollution, while the garden market and flower market are becoming increasingly hot, so the landscaping soil with better soil quality , The demand for soil for flower cultivation and soil for agricultural irrigation is becoming stronger and stronger. [0003] In the prior art, the sludge treatment methods cannot achieve a comprehensive balance in terms of resource utilization, environmental protection, co...

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Problems solved by technology

[0003] In the prior art, the sludge treatment methods cannot achieve a comprehensive balance in terms of resource utilization, environmental protection, cost saving, and feasibility. The methods of incineration, carbonization, and building materials have been realized in terms of resource utilization, environmental protection, and feasibility. A certain degree of balance has been achieved, but the technology is complicated, the operating cost is high, and the use is limited. It is suitable for use in more economically developed areas. The use of composting to fertilize sludge can truly turn waste into waste while controlling costs reasonably. Treasure, making sludge into nutrient soil, realizing the recycling and harmless utilization of sludge

[0004] In the prior art, for the way of composting sludge, it is necessary to add deodorant and accelerator at the same time to ensure that the fermentation is carried out while removing the odor in the sludge. Fully mixed, the utilization rate is not high; the amount of oxygen supplied during the fermentation process is not enough, resulting in incomplete fermentation reaction, low yield, and quality cannot be guaranteed

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