Interpretation of the Government Procurement Case and Winning Bid Solution for the Taizhou 3308 Wastewater Treatment Vehicle EHY5045TWCE6 In the coastal city of Taizhou, municipal sanitation departments have recently faced a prominent challenge: how to efficiently carry out routine wastewater treatment and emergency response operations under humid, rainy conditions, complex sewage networks, and increasingly stringent environmental protection requirements. In a 2024 procurement initiative, the Urban Management Bureau of a district in Taizhou publicly tendered for three compact wastewater treatment vehicles to meet local sewage pumping and treatment needs. Following multiple rounds of technical evaluation and commercial negotiations, Chengli Special Purpose Vehicle Co., Ltd. successfully delivered this batch of vehicles with its EHY5045TWCE6 wastewater treatment vehicle solution. This article uses this case as a basis to deeply analyze the vehicle’s real-world performance in government procurement, with particular emphasis on comparing the technical solutions of the fuel-powered and fully electric versions—providing reference insights for peer procurement decisions. I. Project Background and Requirements Analysis Taizhou is located along Zhejiang’s coast and features a typical subtropical monsoon climate, with an average annual precipitation exceeding 1,500 mm. Rainfall is highly concentrated during the monsoon season, and typhoons frequently pass through the region. These climatic conditions cause significant fluctuations in urban sewer system loads—especially after heavy rainstorms, when manholes and septic tanks in low-lying areas are highly prone to overflow, requiring prompt cleaning and unblocking. The municipal sanitation authority explicitly stipulated several mandatory requirements in its tender documents: the vehicle must possess self-priming, self-discharge, and preliminary filtration capabilities; operate reliably in humid, high-temperature environments; comply with China VI emission standards; possess complete official announcements enabling local registration; and maintain a per-unit budget capped at approximately RMB 343,000 (based on publicly available tender information). During preliminary research, the procuring entity had considered a fully electric solution. However, following on-site inspections and assessments of local charging infrastructure, it ultimately selected the fuel-powered EHY5045TWCE6 model. This decision reflects a thorough consideration of Taizhou’s current charging station distribution, vehicle operational frequency, and actual usage scenarios. II. Fuel-Powered vs. Fully Electric: Cost and Application Scenario Comparison To help procurement entities better understand the differences between the two powertrain options, we have compiled the comparative table below based on technical parameters provided by Chengli Special Purpose Vehicle and prevailing local market pricing. Note that the fully electric version’s price references quotations for comparable models from public tenders, while the fuel-powered version’s data is derived from the official announcement parameters of Chengli’s EHY5045TWCE6 (model number sourced from the MIIT Announcement Database) and actual delivery pricing. Comparison Dimension Fuel-Powered Version (EHY5045TWCE6) Fully Electric Version (Same Chassis Modification) Chassis Brand Dongfeng Iveco / Dongfeng Reference Vehicle Price (RMB 10,000) Approx. 26–30 Approx. 38–45 Range / Operational Duration 8–10 hours continuous operation on full tank 4–5 hours continuous operation on full charge Refueling / Charging Time 10 minutes for refueling 1.5 hours for fast charging / 6 hours for slow charging Annual Energy Cost (Estimated) Approx. RMB 18,000–25,000 Approx. RMB 6,000–9,000 Annual Maintenance Cost Approx. RMB 8,000–12,000 Approx. RMB 4,000–6,000 Applicable Scenarios Operations at sites without fixed charging stations, emergency response, long-distance relocation Daily in