Our Concrete Reclaimer Delivers Zero-Discharge Solution for 40-Truck Fleet in Bulacan, Philippines

Shengmao Machinery has successfully guided the installation, commissioning, and full integration of a Dual-Station Sand & Gravel Separator (Concrete Reclaimer) for a major commercial concrete producer in Bulacan, Philippines.

Operating adjacent to an HZS120 (120 m³/h) commercial batching plant that manages an active fleet of approximately 40 concrete transit mixer trucks (6–10 m³), the facility faced mounting environmental pressures from increasingly stringent Philippine Department of Environment and Natural Resources (DENR) wastewater regulations.

By integrating Shengmao's dual-station recycling system, the plant has achieved virtually zero wastewater and zero solid waste discharge:

100% Recovered Aggregates: Cleaned sand and gravel are continuously recycled back into commercial concrete batches.

100% Closed-Loop Water Reuse: Clarified slurry water is redirected back for mixer truck drum washing and plant cleaning.

1. Project Overview at a Glance

2. Client Background & The Environmental Pain Point

The client is a premier ready-mix concrete supplier in Bulacan, supplying major residential, commercial, and highway infrastructure projects across Central Luzon and Greater Manila. To service high daily demand, the plant dispatches a continuous fleet of 40 mixer trucks (6 m³ to 10 m³ capacity).

Critical Environmental & Operational Challenges:

Severe Environmental Regulations in the Philippines: The Philippine Environmental Management Bureau (EMB / DENR) enforces strict wastewater discharge standards. Commercial batching plants face heavy fines or operational shutdowns if alkaline slurry wastewater (pH > 11) is discharged into local waterways or soil.

Huge Daily Slurry Volume from 40 Trucks: With each truck washing its drum 2–3 times daily, plus daily mixer plant washdowns, the site generated over 80–120 cubic meters of high-density slurry water and tons of residual wet concrete every day.

Severe Land & Sludge Disposal Costs: Allowing residual concrete to harden on the ground consumed valuable plant space, required costly excavator digging, and incurred heavy disposal fees.

Long Truck Washout Queues: A single-station reclaimer would create severe traffic jams for 40 return trucks during peak delivery rush hours. A high-efficiency dual-station system was essential.

3. Why the Client Chose Shengmao Dual-Station Concrete Reclaimer

After benchmarking multiple domestic and international suppliers, the client selected Shengmao Machinery for four decisive reasons:

High-Throughput Dual-Station Architecture: Allows two 10 m³ mixer trucks to wash out simultaneously, cutting driver waiting time by 50% and handling peak return shifts smoothly.

Heavy-Duty Wear-Resistant Engineering: Utilizes 16Mn / high-chromium wear liners and reinforced spiral flights designed to handle abrasive volcanic aggregates and river gravel commonly used in the Philippines.

True Closed-Loop Circular Economy: The system completely separates aggregate, sand, and water, enabling 100% resource reuse with zero discharge into the municipal environment.

Professional Remote & On-Site Engineering Guidance: Shengmao provided comprehensive foundation design drawings, electrical schematics, and step-by-step remote/field engineering guidance.

4. Technical Solution & System Architecture

1). Dual-Bay High-Volume Receiving Hopper

Oversized receiving hopper accommodates two mixer trucks discharging residual concrete at the same time.

High-pressure water nozzles positioned at the hopper guide slurry quickly into the separator drum without clogging or splashing.

2). High-Efficiency Separation & Dewatering Screener

First Stage (Gravel Separation): High-strength rotating trommel screen separates large stone aggregates (> 5 mm) and discharges clean gravel via the side chute.

Second Stage (Sand Separation): Heavy-duty internal spiral classifier washes, dewaters, and lifts clean sand (0.15–5 mm) onto a dedicated aggregate recovery pile.

Moisture Controlled Output: Discharged sand and gravel have low moisture content, allowing immediate reloading into the HZS120 batching bins.

3). Multi-Stage Sedimentation & Agitation System

Slurry water flows into a sequential 3-to-4 stage settling basin system.

Slurry agitators prevent fine cement particles from hardening at the bottom of the pits, keeping slurry suspended for automated recycling pumps to wash subsequent trucks.

4). Fully Automated Smart PLC Control

One-touch automatic wash cycle with driver-operated remote buttons.

Smart overload protection, auto-reversing anti-jamming function, and automatic water level sensors.

5. Installation, Guidance & Rapid Commissioning

Shengmao Machinery provided complete engineering support to ensure rapid, error-free integration next to the active HZS120 plant:

Custom Pit & Foundation Blueprint: Shengmao supplied optimized 3D civil foundation drawings for the dual ramps, washout chutes, and multi-chamber settling ponds.

Guided Mechanical Alignment: Supervised the precise leveling and mounting of the main separator chassis, internal spiral shaft, and drive reducers.

Electrical Wiring & Water Circuitry: Guided local electricians in wiring the waterproof IP65 control cabinet, interlocked pumps, and high-pressure wash lines.

Load Testing with Live Trucks: Conducted full-load trial runs with two 10 m³ mixer trucks simultaneously discharging residual slump. The system separated stone, sand, and water cleanly within minutes.

6. Measurable Business & Environmental Outcomes

100% DENR Environmental Compliance: The plant achieved zero wastewater discharge, completely eliminating regulatory risks and positioning the company as an eco-friendly green concrete leader in Bulacan.

Significant Raw Material Recovery:

Aggregate Savings: Recovers approximately 15–25 tons of usable sand and gravel daily, saving thousands of dollars every month in aggregate purchasing costs.

Water Savings: Recovers over 80% of daily wash water, drastically reducing municipal water utility bills and deep-well extraction.

Zero Truck Congestion: Dual-station design allows each truck to complete washing in under 3–5 minutes, ensuring rapid fleet turnaround for outbound orders.

Clean & Orderly Plant Environment: Eliminated muddy slurry ponds, concrete hardpans, and dust accumulation across the plant yard.

7. Installation pictures