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Project Process

Project Process

Introduction to the Process:

Sludge cavitation cell disruption + advanced dewatering + high-temperature aerobic fermentation process: Residual sludge with a moisture content of 97–99% undergoes initial cavitation cell disruption. After this step, the sludge is fed into conventional dewatering equipment (such as integrated dewatering machines, plate-and-frame filter presses, or belt-type sludge dewaterers) for further dehydration. Following dewatering, the sludge’s moisture content is reduced to 65–80%. Next, the sludge is conditioned with a specialized sludge conditioner before being sent to an ultra-high-pressure belt-type dewatering machine for enhanced dewatering. Once dewatered to a moisture level of 40–50%, the sludge is mixed thoroughly with high-temperature aerobic fermentation bacteria and then transferred into intelligent high-temperature aerobic fermentation tanks. After undergoing controlled high-temperature fermentation until fully decomposed, the material is screened and stored in the finished product warehouse. This treated sludge can be utilized effectively in various applications, including flower cultivation, soil improvement, mine reclamation, landscape gardening, nursery seedling base fertilization, and soil remediation. Additionally, it can also be repurposed for energy recovery and reuse.

Process flow:

The municipal wastewater plant conditions sludge with 80% moisture content before feeding it into a high-pressure machine for advanced dewatering. After this process, the sludge's moisture content can be reduced to as low as 45–50%.

After deep dehydration, the sludge has a moisture content of 45–50%. It is then mixed thoroughly with activated ultra-high-temperature microbial strains before being transferred into a stratified, intelligent, ultra-high-temperature aerobic fermentation tank for aerobic digestion. During the fermentation process, microorganisms proliferate rapidly, causing the material temperature to rise sharply—peaking at over 70°C. This high temperature effectively eliminates insect eggs, pathogenic bacteria, and weed seeds, ensuring the treated material meets stringent standards for harmlessness and volume reduction. Once the aerobic fermentation is complete, the material’s moisture content remains below 40%, resulting in loose, odorless particles that fully comply with the national GB4284 standard. Such materials are suitable for applications like landscape gardening and soil improvement.

 

Technical features:

(1) Utilizing hydraulic cavitation technology to disrupt sludge cell walls, thereby enhancing sludge dewatering performance and biodegradability, reducing the amount of sludge conditioning agents used, and ultimately lowering sludge dewatering costs.

(2) The independently developed ultra-high-pressure sludge belt dewatering machine features a composite upper-and-lower pressing plate structure, offering high processing capacity and显著ly superior dewatering performance, with the filter cake achieving a moisture content of below 50%.

(3) High-temperature aerobic rapid fermentation technology is a mature technology in China; it features intelligent operation, high temperatures, short processing times, minimal land use, low investment, and reduced costs. The construction period is brief, while the resulting product boasts high fertilizer efficiency. Additionally, this process incorporates waste heat recovery technology to achieve energy savings and lower consumption, and utilizes layered heating to significantly shorten the fermentation and maturation cycle.

(4) Strain production—rapid temperature rise, high temperatures, and fast fermentation speed.