Government Procurement Case and Bid-Winning Solution Analysis of the New Dongfeng Sewage Treatment Vehicle in Chengdu In Southwest China—especially in cities like Chengdu, where summer temperatures are high, rainfall is frequent, and ambient humidity remains persistently elevated—the corrosion resistance and sealing performance of municipal sanitation equipment directly determine vehicle service life and operational efficiency. Recently, a municipal sanitation department completed the procurement and delivery of a batch of new Dongfeng sewage treatment vehicles. From the perspective of the fleet management supervisor, we provide an in-depth analysis of these vehicles’ real-world operational performance. The following content is compiled from an authentic procurement case, intended to serve as a reference for similar institutions during equipment selection. Fleet Management Supervisor’s Evaluation: Core Performance in Humid-Heat Environments "Chengdu experiences a long rainy season and high ambient humidity, posing a severe challenge to chassis rust resistance and hydraulic system sealing components," said Mr. Li, Fleet Supervisor of the unit, after receiving 10 Dongfeng DOLICA sewage treatment vehicles supplied by Chengli Special Purpose Vehicle Co., Ltd. His first concern was body corrosion: "Some previous models we used began showing rust spots at the chassis-to-tank connection points within two years—not only affecting aesthetics but also raising concerns about structural integrity. These Chengli vehicles feature enhanced anti-corrosion coating at the factory, especially on internal tank surfaces and critical chassis weld joints. After one full rainy-season operation cycle, no rusting has been observed." Mr. Li specifically highlighted the durability of sealing components: "Sewage treatment vehicles frequently operate on flooded roads; if hydraulic cylinder and pipeline joint seals are substandard, leakage easily occurs. This batch uses imported sealing materials resistant to oil and high temperatures. Even under Chengdu’s humid-heat conditions and prolonged high-load operation, seals remain intact with no dripping or leaking—critical for reducing long-term maintenance costs." Operational Flexibility: Responding to Urgent Tasks "Chengdu experiences frequent summer downbursts, sometimes requiring emergency flood drainage missions," explained Mr. Li. "These Dongfeng sewage treatment vehicles—modified on Dongfeng chassis (e.g., reference model CLW5070GSSD6)—feature short wheelbase and small turning radius, enabling highly agile operation in narrow streets or older residential neighborhoods. Moreover, the upper-body assembly adopts modular design, allowing rapid mode switching among suction, separation, and discharge functions based on site requirements—greatly enhancing dispatch efficiency." He added that the standard remote monitoring system enables the dispatch center to track each vehicle’s real-time location and tank fill-level status, significantly improving emergency response capability. Fuel Consumption Monitoring Data: Economic Performance Over a three-month fuel consumption monitoring period, these vehicles delivered impressive results. Mr. Li provided the following comparative table (data source: daily fleet fuel records): Comparison Item | Chengli Dongfeng Sewage Treatment Vehicle | Other Comparable Brands (Reference) ---|---|--- Engine Model (Reference) | Dongfeng DOLICA (China VI) | Same-displacement engines from other brands Average Fuel Consumption (L/100 km) | 12.5 | 14.2 Loaded-Operation Fuel Consumption (L/hour) | 18.3 | 20.1 Idling Fuel Consumption (Unloaded, L/hour) | 1.8 | 2.2 Annual Comprehensive Fuel Cost (RMB/vehicle) | ~¥36,000 | ~¥42,000 Note: Data reflects average measured values over three months under identical operating conditions; cost calculations are based on local fuel prices.