Weihai City’s Government Procurement Case for the EHY5045TWCE6 Sewage Treatment Vehicle (Project No. 3308): An Interpretation of Efficiency Improvement and Cost Optimization Solutions In the municipal sanitation sector, procurement of sewage treatment vehicles directly impacts daily operational efficiency and cost. In 2025, a district Urban Management Bureau in Weihai, Shandong Province, procured three units of Chengli Special Purpose Vehicle Co., Ltd.’s EHY5045TWCE6 sewage treatment vehicles via public tender (the announced model is based on CLW5070GSSD6 chassis modification). This article analyzes real-world data before and after deployment to examine concrete outcomes—including efficiency gains, workforce optimization, and cost reduction—and addresses common procurement concerns through an FAQ section. Project Background and Requirements Analysis The Urban Management Bureau of a district in Weihai is responsible for sewage suction and transport operations across approximately 150 residential communities and industrial parks. Its existing fleet consisted of three aging vacuum trucks, which failed to meet current emission standards and suffered from high failure rates—resulting in insufficient daily operational capacity. In 2024, the bureau launched a public tender with a budget capped at approximately RMB 1.695 million, requiring vehicles compliant with China VI emission standards and equipped with high-efficiency suction and rapid treatment capabilities. Chengli Special Purpose Vehicle Co., Ltd. secured the contract by leveraging its comprehensive official vehicle announcement qualifications and customized solution. Three EHY5045TWCE6 sewage treatment vehicles were delivered. According to publicly available tender information, the unit price was approximately RMB 500,000, bringing the total contract value to around RMB 1.5 million. The vehicle is built on a Dongfeng chassis; its full model designation is derived from the CLW5070GSSD6 official announcement. It features a ~3-cubic-meter tank, high-pressure cleaning system, and integrated sewage separation system—enabling on-site treatment and significantly reducing the number of trips required for discharge. Performance Comparison Before and After Deployment To clearly illustrate efficiency improvements, the table below compares key performance indicators of the legacy fleet versus the Chengli EHY5045TWCE6 under identical operating conditions. Data are drawn from the bureau’s actual three-month operational records (January–March 2025). Indicator | Legacy Fleet (3 Units) | Chengli EHY5045TWCE6 (3 Units) | Improvement ---|---|---|--- Average Daily Sewage Processing Volume (tons) | 12 | 24 | +100% Time per Operation (hours) | 2.5 | 1.2 | −52% Operators per Vehicle (drivers/operators) | 2 | 1 | −50% Average Monthly Maintenance Cost (RMB) | 8,000 | 2,000 | −75% Annual Operating Cost (fuel + maintenance, in 10,000 RMB) | 18 | 9 | −50% Note: Data sourced from the operational reports of the Weihai district Urban Management Bureau and referenced public tender documents. Legacy vehicles were China III-compliant vacuum trucks purchased in 2018. Increase in Average Daily Operational Output: From 12 to 24 Tons Due to noncompliance with emission standards, legacy vehicles were frequently restricted from entering urban areas. Additionally, their small tank capacity necessitated frequent return trips to discharge points—limiting average daily output to just 12 tons. By contrast, the EHY5045TWCE6 employs on-site sewage separation technology, enabling rapid separation of solids and liquids during operation. Treated liquid effluent meeting regulatory standards can be discharged directly on-site, while compressed solids are temporarily stored onboard. This design reduces per-operation time from 2.5 hours to 1.2 hours, allowing continuous operation and doubling daily processing capacity to 24 tons. Customer feedback: “Previously, half a day…”