As an important facility for treating feces and domestic sewage, septic tanks have built a bridge between environmental protection and agriculture. It converts organic waste into harmless substances through biological reactions, while generating valuable organic fertilizer resources. This process not only solves the problem of environmental pollution, but also provides an important source of nutrition for agricultural production.

septic tankTransforming metabolites into three types of high-quality organic fertilizers: humic acid content reaching30%Biogas residue and quick acting nitrogen phosphorus potassium composite slurry，And fermentation products rich in microbial communities.

After dehydration treatment, sludge becomes the golden material for improving soil. Each ton of sludge contains8kgOrganic matter and2kgHumic acid has the same improvement effect on compacted soil as ordinary compostthreeTwice. As a liquid fertilizer, the quick acting nitrogen content of biogas slurry reaches0.4%The ratio of phosphorus to potassium is close1:0.5:1The golden ratio of crops.In addition,Active proteases in biogas slurry can significantly enhance crop stress resistance. In typhoon prone areas of Hainan, the lodging rate of rice treated with biogas slurry is reduced40%In the by-products of fermentation，High temperature resistant separated from septic tankscellulose decomposing bacteria，abilityTransform the straw composting cycle fromninetyDays shortened toforty-fiveHeaven; Produced by photosynthetic bacteriaBiological deodorant，In garbage classification applicationsAmmonia removal rate reaches92%The market value of these microbial preparations is higher than that of traditional organic fertilizers5-8Twice.

In agricultural production, organic fertilizers regenerated from septic tanks are widely used in fields such as farmland planting, orchard management, flower maintenance, and soil improvement. The application of organic fertilizer can not only provide various nutrients needed by crops, but also improve soil structure, enhance soil water retention and permeability, and create a more favorable growth environment for crops. Meanwhile, the application of microbial fertilizers can further enhance the ecosystem function of soil and improve the overall growth performance of crops.

The organic cycle of septic tanks not only realizes the resource utilization of organic waste, but also provides an important source of fertilizer for agricultural production, which is an effective way to achieve sustainable agricultural development.