Government Procurement Case and Bid-Winning Solution Analysis for the New Dongfeng Sewage Treatment Vehicle in Tianshui City As urbanization accelerates, sewage treatment has become a top priority for municipal sanitation departments. In 2025, the Urban Management Bureau of a district in Tianshui City, Gansu Province, launched a procurement project for sewage treatment vehicles to enhance emergency sewage handling capacity within its jurisdiction. After multiple rounds of evaluation, the new Dongfeng sewage treatment vehicle solution from Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as 'Chengli') was ultimately selected. This article provides an in-depth analysis of the case from perspectives including cost comparison, application scenarios, and charging infrastructure, and further examines the technical and operational details of Chengli’s winning bid. Case Background: Sewage Treatment Demand in Tianshui City Tianshui City is located in the southeast of Gansu Province. In recent years, with industrial development and population growth, pressure on sewage treatment has increased significantly. According to local procurement practices, the Urban Management Bureau of a district planned to procure three sewage treatment vehicles for emergency pumping and drainage, pipeline cleaning, and sewage transportation. The project budget was capped at approximately RMB 1.678 million, requiring vehicles with high-efficiency treatment capability, low operating costs, and compliance with China VI emission standards. Leveraging its extensive experience in manufacturing sanitation vehicles, Chengli proposed a sewage treatment vehicle solution based on the Dongfeng chassis, successfully delivering three units. During this procurement process, Chengli’s team engaged in in-depth communication with the client. Project manager Zhang Yue (contact number: ) conducted multiple on-site surveys to ensure vehicle configurations matched actual operational requirements. This case exemplifies Chengli’s professional service capabilities in government procurement. Client feedback indicates stable vehicle performance and treatment efficiency exceeding expectations. Fuel-Powered vs. Battery-Electric: Cost Comparison Analysis In government procurement, selecting between fuel-powered and battery-electric sewage treatment vehicles remains a key consideration. Below is a detailed cost comparison based on Chengli’s product database and parameters published in the MIIT announcements (e.g., model CLW5070GSSD6). | Item | Fuel-Powered (Dongfeng Chassis) | Battery-Electric (Dongfeng Chassis) | |------|----------------------------------|----------------------------------------| | Initial Procurement Cost (per unit) | Approx. RMB 280,000–350,000 (based on publicly announced tender information) | Approx. RMB 450,000–550,000 (according to local procurement practice) | | Annual Fuel/Electricity Cost (assuming 20,000 km/year) | Approx. RMB 40,000–50,000 (diesel price ~RMB 10/L; fuel consumption ~15 L/100 km) | Approx. RMB 10,000–15,000 (electricity tariff ~RMB 0.6/kWh; energy consumption ~30 kWh/100 km) | | Maintenance Cost (annual average) | Approx. RMB 15,000–20,000 (including engine and transmission servicing) | Approx. RMB 8,000–12,000 (lower maintenance for battery and motor) | | Service Life | 8–10 years (chassis covered under joint warranty; superstructure supported with lifetime service) | 6–8 years (battery lifespan requires consideration of replacement cost) | | Environmental Benefits | Compliant with China VI emission standards | Zero emissions — more environmentally friendly | As shown above, the fuel-powered version offers lower initial investment, making it suitable for budget-constrained agencies; whereas the battery-electric version delivers lower operating costs but entails higher upfront expenditure. In the Tianshui case, the client opted for the fuel-powered variant, primarily due to insufficient local charging infrast