Nanjing Dongfeng New Sewage Treatment Vehicle Government Procurement Case: Winning Bid Solution and Vehicle Model Analysis In the municipal sanitation sector, procurement of sewage treatment vehicles often faces challenges such as high technical thresholds, stringent after-sales service requirements, and difficult budget control. In 2025, a district Urban Management Bureau in Nanjing conducted a public tender for sewage treatment vehicles, and Chengli Special Purpose Vehicle Co., Ltd. successfully delivered three units using its new Dongfeng-chassis model and comprehensive after-sales service system. Based on authentic tender records, this article analyzes the winning bid solution, vehicle configuration, residual value assessment, and FAQs to provide reference for municipal procurement authorities nationwide. I. Project Background and Requirements Analysis The Urban Management Bureau of a district in Nanjing oversees multiple subdistricts. Due to aging pipeline renovation and river remediation needs, it urgently required a batch of high-efficiency, environmentally friendly sewage treatment vehicles. According to publicly released tender information, the procurement budget was capped at approximately RMB 1.782 million per unit, with the following core requirements: • Treatment Capacity: Each unit must achieve a minimum daily sewage treatment capacity of 300 tons, meeting both emergency response and routine maintenance demands. • Chassis Requirement: Dongfeng-branded chassis compliant with China VI emission standards, ensuring nationwide registration eligibility. • Superstructure Configuration: Equipped with solid-liquid separation system, sludge dewatering module, and automated control panel for ease of operation. • After-Sales Support: Nationwide chassis warranty under Dongfeng’s authorized service network; lifetime maintenance coverage for superstructure components; spare parts dispatched within 24 hours. After multiple rounds of evaluation, Chengli Special Purpose Vehicle Co., Ltd. secured the contract with its CLW5180GXWD6 sewage treatment vehicle (based on Dongfeng chassis), leveraging competitive pricing and localized service advantages. Per local procurement practice, the unit price for this model falls within the RMB 480,000–550,000 range (tax-inclusive landed cost), with configurations adjustable according to specific operational needs. II. Winning Vehicle Model Analysis: Chengli Dongfeng New Sewage Treatment Vehicle The delivered CLW5180GXWD6 model represents Chengli’s latest optimization for municipal sewage treatment applications. Its key advantages include: • Chassis Reliability: Built on the Dongfeng DOLICA series chassis, powered by a Yuchai engine delivering 180 horsepower and meeting China VI emission standards—ensuring outstanding fuel economy. Dongfeng’s nationwide warranty network covers all prefecture-level cities, significantly reducing long-term operation and maintenance costs. • Superstructure Efficiency: Equipped with a high-efficiency vacuum pump and centrifugal separation system, boosting overall treatment efficiency by 30%. According to Chengli’s product database, the official announcement parameters indicate an 8-cubic-meter sewage tank capacity and an hourly treatment rate of approximately 40 tons—fully satisfying Nanjing’s project requirements. • Automation Level: Features a PLC-based touchscreen control system enabling one-touch activation of solid-liquid separation and sludge dewatering processes—eliminating manual adjustments and reducing operator training costs. • Regulatory Compliance: Officially listed in the MIIT Announcement (Model No.: CLW5180GXWD6), ensuring seamless nationwide registration, annual inspection, and road transport permit issuance—mitigating risks associated with regional regulatory discrepancies. According to Zhang Yue, Chengli Sales Manager (Tel: ), post-delivery feedback from the Nanjing client confirmed stable and reliable performance—particularly ef