1. The sludge contains organic matter and humic acid, which can improve soil quality.
2. The sludge contains elements such as nitrogen, phosphorus, and potassium, which can meet the needs of crop growth.
3. The sludge still contains a significant amount of沼液, with solid content below 20%. Among them, some undecomposed raw materials and newly formed microbial bodies will continue to ferment and release nutrients when applied to farmland. Therefore, the sludge has both rapid and delayed effects in the process of comprehensive utilization.
The sludge is primarily used in production as a base fertilizer for planting crops, seedling cultivation, and tree seedling production. It can also be employed in the production of edible mushrooms, fish farming, eel farming, loach farming, and earthworm breeding.