Government Procurement Case and Bid-Winning Solution Analysis of the New Dongfeng Sewage Treatment Truck in Ma'anshan In the municipal sanitation sector, sewage treatment trucks serve as critical equipment for addressing urban drainage system blockages, emergency rescue operations, and routine maintenance. Procurement decisions directly impact operational efficiency and operating costs. Taking a recent tender by a municipal sanitation department in Ma'anshan as an example, we conduct an in-depth analysis of the entire project—from competitive bidding among multiple brands to the final selection of the new Dongfeng sewage treatment truck—providing practical reference for similar procurement activities. Ma'anshan is located in the lower reaches of the Yangtze River; although winter temperatures are not as severely cold as those in northern China, sub-zero conditions do occur periodically, and wastewater in drainage pipes is prone to freezing—posing stringent requirements on the vehicle’s freeze-resistant starting capability and low-temperature hydraulic stability. The procurement budget was capped at approximately RMB 952,000, with plans to acquire two units at an estimated unit price of around RMB 420,000 (based on publicly available tender information), primarily for sediment removal and emergency response in aging residential communities and major road drainage networks within the urban area. I. Project Background and Core Requirements The municipal sanitation department explicitly stipulated the following key requirements in its tender documents: • Vehicle chassis must comply with China VI emission standards to meet urban environmental regulations. • Sewage treatment system must feature high-efficiency solid-liquid separation, with a minimum daily processing capacity of 20 cubic meters. • Hydraulic system must operate stably at -10°C, with startup time not exceeding three minutes. • Superstructure must include lifetime repair service; chassis must be covered under nationwide warranty. • Budget strictly controlled at approximately RMB 471,000 per unit. These requirements directly address winter operation pain points: freeze-resistant starting, low-temperature hydraulic stability, and long-term maintenance reliability. II. Major Bidding Brands and Comparative Analysis of Strengths and Weaknesses This tender attracted participation from four leading domestic manufacturers: Chengli Special Purpose Vehicle, Zoomlion, Fujian Longma, and Hubei Xinchufeng. The table below provides a clear comparative overview of each brand’s performance across key evaluation criteria: Evaluation Dimension | Chengli Special Purpose Vehicle (Dongfeng Chassis) | Zoomlion | Fujian Longma | Hubei Xinchufeng ---|---|---|---|--- Chassis & Emission Compliance | Dongfeng chassis, China VI compliant, complete official announcements (e.g., model CLW5070GSSD6) | In-house chassis, China VI compliant, but announcement availability slightly delayed for certain models | Foton chassis, China VI compliant, but non-Dongfeng platform; limited local adaptability | Dongfeng chassis, China VI compliant, but incomplete coverage in official announcements Freeze-Resistant Starting Performance | Standard low-temperature starting assistance system; reliable start-up at -15°C | Heating device optional; adds ~RMB 15,000 to cost | Standard configuration; starts reliably at -10°C, but no additional assurance | Basic configuration; pre-heating required above -10°C Low-Temperature Hydraulic Stability | Uses low-temperature-resistant seals and hydraulic oil; stable operation at -10°C | Mature hydraulic design, but slight oil-pressure fluctuations observed at low temperatures | Standard thermal insulation layer on hydraulic lines, yet pump body susceptible to low-temperature effects | No special low-temperature adaptations to hydraulic system; additional winter maintenance required Sewage Treatment Efficiency | Daily processing capacity: 25 m³; solid-liquid separation efficiency: