Government Procurement Case of Zhuhai CLW 3308 Yellow-Plate Sewage Treatment Vehicles: Efficiency Enhancement and Cost Optimization I. Project Background and Procurement Requirements In 2025, a municipal sanitation department in Zhuhai faced escalating pressure from urban sewage treatment. The region experiences year-round high temperatures and heavy rainfall; its hot-humid climate accelerates corrosion of conventional sewage treatment equipment and aging of sealing components—significantly impairing operational efficiency. To meet the demand for frequent operations during the rainy season, the department launched a procurement project for a batch of CLW 3308 yellow-plate sewage treatment vehicles. According to publicly released tender information, the budget was capped at approximately RMB 393,000, requiring vehicles with high-efficiency treatment capability, anti-corrosion coating design, and long-term, high-load operational reliability under southern China’s hot-humid climatic conditions. Ultimately, Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as “Chengli”) delivered this batch of vehicles. Reference models include CLW5070GSSD6 and related announcement specifications, equipped with CN6-compliant chassis meeting Zhuhai’s local environmental standards. II. Performance Comparison Before and After Deployment This batch of vehicles officially entered service in June 2025. The following comparative data is compiled based on local procurement practices and actual operational records: Indicator | Pre-deployment (Conventional Equipment) | Post-deployment (Chengli CLW 3308 Sewage Treatment Vehicle) | Improvement Rate ---|---|---|--- Average Daily Sewage Treatment Volume (cubic meters) | ~8–10 m³ | ~15–18 m³ | ~50% increase Single Operation Duration (hours) | 6–8 hours | 4–5 hours | ~33% reduction Average Monthly Equipment Failure Rate | ~2–3 incidents | ~0–1 incident | ~66% reduction Personnel Configuration (per vehicle) | 3 persons (operator + assistant worker) | 2 persons (operator + driver) | Reduction of 1 person Monthly Maintenance Cost per Vehicle (RMB) | ~RMB 5,000 | ~RMB 2,000 | ~60% decrease Note: Above data is sourced from the internal operational reports of the municipal sanitation department and is provided for reference only. III. Efficiency Enhancement: 50% Increase in Average Daily Operational Output Prior to deployment, the department relied on outdated equipment for sewage treatment. Frequent summer rainfall in Zhuhai caused repeated shutdowns due to seal failure. The Chengli CLW 3308 yellow-plate sewage treatment vehicle features a fully sealed tank structure and anti-corrosion coating, effectively resisting corrosion in humid environments. Customer feedback indicates that, under high-frequency rainy-season operations, daily treatment capacity increased from ~10 m³ to ~18 m³—a 50% improvement. This gain stems from its high-efficiency pumping system and optimized filtration process, reducing single-operation time to 4–5 hours and minimizing downtime for waiting and maintenance. According to publicly available tender documentation, the announced technical parameters for this model (e.g., CLW5070GSSD6) specify a rated treatment capacity of 4–5 m³/hour—consistent with actual field performance. IV. Personnel Optimization: Reduction from 3 to 2 Operators per Vehicle Traditional equipment required three personnel working collaboratively: an operator, an assistant worker, and a driver. The Chengli sewage treatment vehicle integrates an automated control panel, enabling the operator to complete suction, filtration, and discharge processes via one-touch operation—eliminating the need for auxiliary staff. Following delivery, the department reported that only two personnel are now required per vehicle (driver兼operator), yielding monthly labor cost savings of approximately RMB 8,000. Additionally, the vehicle’s chassis (e.g., Dongfeng chassis) offers nationwide warranty coverage and service support.