Introduction: The Boom of Indonesian Infrastructure and Sand Demand
As Indonesia accelerates its infrastructure development—from highways and airports to industrial parks—the demand for high-quality construction sand has skyrocketed. To meet this massive demand, our client, a leading aggregates producer in Indonesia, expanded their Sand Washing Plant operations. However, as their production capacity increased to a medium-large scale, managing the massive volume of wastewater became an unprecedented challenge. They desperately needed a reliable solution, which led them to seek out a high-capacity Belt Filter Press system.
The Challenge: Strict Environmental Regulations & High Volume
A sand washing plant producing high volumes generates massive amounts of slurry containing fine sand, silt, and clay. If not treated properly, this wastewater causes severe environmental pollution and violates Indonesia’s increasingly strict environmental regulations. Furthermore, settling ponds consume vast land areas and recovering water was inefficient. The client required a reliable, continuous dewatering system to handle 3,000 m³ of wastewater per day and recycle clean water back into the washing process.
The Solution: Complete Sand Washing & Dewatering Process
We provided a complete closed-loop water recycling system. The typical treatment process includes:
- Wastewater Collection: Sand washing slurry is directed to a collection tank.
- Sand Recovery: A fine sand recovery unit (Hydrocyclone) extracts valuable fine sands that are usually lost in traditional washing, maximizing the client’s yield.
- Slurry Thickening: The remaining muddy water is sent to a deep cone thickener where flocculant is added. Suspended solids settle to the bottom, forming a high-concentration underflow slurry.
- Mechanical Dewatering (The Core): The thickened slurry is pumped into our 3.5-meter Large Mining Belt Filter Press.
- Water Recycling: The separated clear water overflows from the filter press and is pumped back to the sand washer for reuse.
Why 4 Units of 3.5m Belt Filter Press?
Our client initially needed to handle 3,000 m³/day. Our high-capacity 3.5m belt filter press can process 100 m³ of wastewater per hour, operating 10 hours a day.
To accommodate the client’s future production expansion without the need to build new infrastructure later, we designed and installed 4 units of 3.5m belt filter presses. This configuration allows them to run 3 units for daily operations, with 1 unit on standby, or run all 4 units to easily handle massive throughput when peak production hits.
Key Advantages Delivered to the Client:
- Environmental Compliance & Dry Stacking: The final filter cake has a low moisture content, making it easy to transport and suitable for dry stacking or recycling, completely eliminating the risk of environmental fines.
- Massive Continuous Capacity: Unlike plate and frame presses that require frequent manual unloading, our belt filter press provides fully continuous operation, perfectly matching the continuous nature of a large sand washing plant.
- Extreme Energy Efficiency: The heavy-duty belt filter press operates with very low power consumption. For a sand washing plant handling thousands of cubic meters, this saves a tremendous amount of electricity costs annually.
- Low Labor & Maintenance Costs: The system is highly automated. One operator can easily manage multiple units. The belts are designed for easy tracking and washing, reducing downtime and daily maintenance costs significantly.
Client Feedback:
“Our client’s operation manager stated: ‘Since installing the four 3.5m belt filter presses, we have completely eliminated our environmental fines, which used to be a major headache for us. More importantly, the recovered water has reduced our daily freshwater consumption by 40%. In a large-scale sand washing operation like ours, this saves us a significant amount of money every single month.
We are also very impressed by the system’s high automation—one operator can easily manage the entire dewatering process without constant supervision. The heavy-duty design handles our continuous 10-hour shifts effortlessly. Furthermore, the final filter cake is incredibly dry, making it much easier and cheaper to transport and stack. This system has truly exceeded our expectations and future-proofed our expansion plans.'”
Conclusion
By integrating our heavy-duty 3.5m belt filter press, this Indonesian sand washing plant not only solved their wastewater bottleneck but also created a highly profitable, eco-friendly, and sustainable operation. Contact us today to see how our dewatering solutions can help your sand washing plant scale up!
