As a water environment sensitive area in Guangxi, Leye’s unique karst landform results in inherently weak anti-pollution capacity. Crisscrossing underground rivers, shallow groundwater and strong water fluidity enable directly discharged sewage to rapidly contaminate both underground and surface water sources. Key water quality indicators in some river sections have exceeded standard limits, with unregulated sewage discharge from expressway stations acting as a major contributing factor. Without effective sewage treatment equipment, raw wastewater was discharged directly, and pollutants seeped into the ground through karst fissures, severely endangering drinking water sources and public water safety. Uncontrolled sewage discharge damages local ecosystems, impairs natural landscapes and restricts cultural tourism development. Therefore, the installation of professional and high-efficiency sewage treatment equipment is not an optional measure, but an essential bottom-line project for ecological protection, people’s livelihood security and sustainable regional development.

Tailored to Leye’s karst geographical conditions and the pollution characteristics of expressway station wastewater, local authorities have adopted a site-specific and targeted governance approach. Customized sewage treatment equipment has been deployed across all stations to form a complete treatment system consisting of pre-treatment, biological treatment and advanced treatment, accurately resolving local water pollution challenges.Integrated sewage treatment units are installed at high-traffic service areas. Featuring a compact footprint, high processing efficiency and strong anti-shock loading capacity, this all-in-one equipment adapts well to large and fluctuating wastewater discharge. It eliminates pathogenic bacteria to ensure discharge compliance, while enabling closed-loop sludge disposal to prevent secondary pollution. The system realizes full collection, complete treatment and standard discharge of station sewage from the source, effectively intercepting pollutants and solving the problem of scattered pollution expanding into large-scale contamination in karst areas, thus avoiding irreversible ecological damage.

Since the full installation and operation of sewage treatment equipment at Leye expressway stations, wastewater at all sites has been efficiently collected, treated and discharged in compliance with environmental standards. Significant reductions in ammonia nitrogen, total phosphorus, COD and other pollutants have been achieved, completely eliminating direct sewage discharge. The stable treatment performance fully demonstrates the extreme importance and necessity of professional water treatment equipment installation. Only by attaching importance to and properly applying sewage treatment facilities can local karst water resources be well preserved, ecological protection measures be fully implemented, and balanced development between people’s wellbeing and economic growth be realized. The value of water treatment equipment installation has become an integral part of Leye’s ecological conservation and high-quality development.

Water environment governance starts with reliable equipment — this core conclusion drawn from Leye’s practical experience has become an essential solution for sewage management in karst regions. The equipment installation practice at Leye Expressway Station fully illustrates the significance of facility-based, precise pollution control, and highlights the irreplaceable core role of water treatment equipment in ecological protection.In ecologically fragile karst areas with complex water governance difficulties, professional, adapted and high-performance sewage treatment equipment is the fundamental barrier against source pollution, water ecological risks and unbalanced development between ecology, livelihood and local industries. Moving forward, Leye County will strengthen daily operation, maintenance, regular inspection and equipment upgrading to ensure long-term stable operation, continuously practicing the core value of standardized water treatment equipment deployment.

Furthermore, the mature experience of equipment installation and application will be promoted to decentralized sewage treatment projects and other water governance projects in urgent need, so as to continuously improve the regional water pollution prevention and control system. Supported by professional equipment and advanced technology, we will consistently safeguard global water security, extend ecological benefits to the public, and steadily advance green development. It will also raise widespread awareness of the critical value of sewage treatment equipment in modern ecological governance.