Rural sewage treatment has become a key part of environmental protection and rural revitalization in many regions. Decentralized villages often lack access to municipal sewer networks, and conventional large-scale treatment plants are not economically feasible. In this context, integrated sewage treatment equipment offers a practical solution. This case report describes a rural sewage treatment project completed by Shandong Zhongqiao Enlightenment Environmental Protection Equipment Co., Ltd. in a village in eastern China.
The project serves a village with approximately 800 residents and a design flow rate of 150 cubic meters per day. The wastewater sources include household kitchen and bathroom discharge, small rural shops, and public facilities. The main pollutants of concern are chemical oxygen demand, biochemical oxygen demand, suspended solids, ammonia nitrogen, and total phosphorus. The project was required to meet the local rural sewage treatment discharge standard, which is stricter than direct river discharge but less stringent than urban plant standards.
Zhongqiao Enlightenment proposed an integrated sewage treatment system using an anaerobic-anoxic-oxic (A2O) process combined with secondary sedimentation and ultraviolet disinfection. The equipment was supplied in a buried installation configuration to minimize visual impact and protect the units from extreme weather. The plant was designed to operate automatically with minimal daily operator presence, which is important for rural sites where full-time technical staff are not available.
The equipment was manufactured at Zhongqiao Enlightenment's production facility in Weifang, which covers 40,000 square meters and includes sheet metal processing, welding, anti-corrosion treatment, and electrical assembly workshops. The tanks were made of carbon steel with internal anti-corrosion coating and external weather-resistant paint. The process pipelines, valves, blowers, pumps, and control cabinet were all pre-installed and tested before shipment.
Installation on site took approximately ten days. The civil work was limited to excavation, concrete base pads, and inlet/outlet pipe connections. The equipment was lifted into place, leveled, and connected to the village sewer network. After hydraulic testing and electrical commissioning, the system was put into trial operation. The startup team provided on-site training to village maintenance staff, covering daily inspection, sludge removal, and simple troubleshooting.
During the commissioning period, the system achieved stable removal of organic pollutants and suspended solids. Ammonia nitrogen removal exceeded the design target, and the UV disinfection unit effectively reduced fecal coliform counts. The sludge production was lower than expected because of the extended sludge age in the biological tank. Excess sludge is periodically removed by a vacuum truck and transported to a municipal sludge treatment facility.
One of the key benefits of this project was the short construction period. Compared with a conventional reinforced concrete plant, which would have required several months of civil construction, the integrated equipment approach reduced the on-site schedule to less than one month. This minimized disruption to village life and allowed the plant to begin operation before the rainy season.
The project also demonstrated the cost advantage of decentralized treatment. By avoiding long sewer pipelines and large-scale pumping stations, the village achieved effective sewage treatment at a lower total investment. The automatic control system reduced operating labor costs, and the energy-efficient blowers kept electricity consumption within the planned budget.
Zhongqiao Enlightenment provided a one-year warranty period and established a remote monitoring channel to track equipment status. The company's technical team can diagnose alarms and guide local operators by phone or video. This after-sales support model is especially valuable for rural projects where professional maintenance resources are limited.
The village selected integrated sewage treatment equipment after evaluating several alternatives, including septic tanks, constructed wetlands, and small-scale activated sludge plants. The integrated A2O solution was chosen because it offered the best combination of treatment performance, land use, and operating simplicity. It also provided a clear path to meeting future stricter discharge standards if local regulations change.
Before the project was implemented, the village had relied on simple septic tanks and open drainage ditches. During the rainy season, untreated sewage mixed with stormwater and flowed into nearby canals, causing odor problems and water quality concerns. The new system collects sewage from households and public facilities, treats it to the required standard, and discharges the effluent into an existing irrigation channel. This has improved both public health and the appearance of the village.
The project design took into account the seasonal variation in wastewater flow. During the Spring Festival and other holiday periods, the village population increases temporarily, and water consumption rises. The equalization tank and flexible biological process help absorb these fluctuations without affecting effluent quality. This design feature is important for rural areas where population varies significantly throughout the year.
Zhongqiao Enlightenment's experience in rural projects has shown that successful implementation depends on more than just equipment quality. It also requires clear division of responsibilities between the equipment supplier, the installer, and the village management committee. The company provides a detailed operation and maintenance manual and recommends a simple daily checklist for the local operator. This helps ensure that the plant continues to perform well after the commissioning team leaves.
This rural sewage treatment case shows how integrated sewage treatment equipment can solve real-world environmental challenges in small communities. With its manufacturing strength, project experience, and customer-oriented service, Zhongqiao Enlightenment continues to support rural wastewater management projects across China and abroad. The company welcomes inquiries from village administrators, environmental engineering firms, and contractors looking for reliable rural sewage treatment solutions.
