1. Raw material ratio: Corn/cassava starch (40%-70%) is used as the basic water-absorbing material, pre-gelatinized starch (20%-40%) provides adhesion, guar gum (1%-2%) is used to enhance the particle strength, activated carbon (1%-3%) is added for deodorization, and mesoporous materials (2%-4%) are added to improve the odor adsorption efficiency.

‌

2. Puffing process: The screw extruder is heated to 160°C to break the hydrogen bonds of the starch molecules and gelatinize to form a porous structure.The moisture content of the raw material is 15%-25%, the extrusion time is ≤5 seconds, and the particle density is reduced by 30%-40% after puffing.

‌3. Granulation: The twin-screw extruder is formed through a mold, and the particle diameter is 2-6mm and the length is 5-20mm. The pre-gelatinized starch gels when it encounters water, and forms a stable network structure after cooling.

‌4. Drying and dehydration‌: The drum dryer is suitable for large-scale drying of various cat litter raw materials such as bentonite, potato residue, sawdust, etc., and the moisture content is reduced from 16% to below 8%. Microwave drying is mostly suitable for tofu cat litter, which has a sterilization function and can extend the shelf life by more than 30%.

‌5. Screening and cooling: The vibrating screen removes dust <0.15mm (concentration ≤5mg/m³), and the proportion of qualified particles is ≥95%. Naturally cool to room temperature to prevent starch particles from absorbing moisture and rehydrating.

‌

6. Packaging, storage and transportation‌: Sealed packaging, automatic packaging machine is filled with nitrogen to prevent moisture, and the water activity (Aw) is controlled below 0.65.