A Model of Bridge Construction Wastewater and Sludge Treatment — Xi'an DIEN Water Treatment Helps China Railway Major Bridge Engineering Group Achieve Environmental Compliance and Water Reuse
In bridge engineering construction, the treatment of construction wastewater, domestic Wastewater and pile foundation sludge is the core part of environmental protection management. Targeting the characteristics of bridge construction sites such as large water quality fluctuations, high silt content, limited land space and tight construction schedules, Xi'an DIEN Water Treatment Equipment Co., Ltd. has customized an integrated solution of integrated Wastewater treatment and sludge solid-liquid separation for key bridge projects of China Railway Major Bridge Engineering Group.
Through the efficient combination of integrated Wastewater treatment equipment and plate and frame filter press, it realizes Wastewater compliance discharge, sludge reduction and clean water reuse, helping China Railway Major Bridge Engineering Group build a benchmark construction site with green compliance, high efficiency and energy saving.
I. Project Overview
This project provides full-process services including survey and design, equipment manufacturing, installation and commissioning, operation and maintenance training by Xi'an DIEN Water Treatment, serving the bridge construction projects of China Railway Major Bridge Engineering Group. The project covers three major scenarios: construction wastewater treatment, domestic Wastewater purification, and pile foundation sludge solid-liquid separation. Integrated Wastewater treatment equipment is adopted to treat mixed Wastewater, combined with plate and frame filter press to realize deep sludge dewatering. The system has the advantages of small land occupation, fast installation, fully automatic operation and strong impact load resistance, meeting the environmental protection and water demand throughout the whole cycle of bridge construction. The project passed the environmental acceptance at one time and has been operating stably ever since, winning high recognition from China Railway Major Bridge Engineering Group.
II. Raw Water Quality Problems
Through on-site detection and working condition analysis, the main pain points of project Wastewater and sludge are as follows:
Serious excess of suspended solids (SS) in construction wastewater: A large amount of sediment and colloid are generated from pile foundation and concrete maintenance, with extremely high turbidity, which is easy to block pipelines and equipment.
Excessive organics and ammonia nitrogen in domestic Wastewater: COD, BOD and ammonia nitrogen in living quarters exceed the standard, failing to meet the requirements of pipeline discharge and reuse standards.
Difficult treatment of pile foundation sludge: The sludge features high water content and fine particles, slow natural sedimentation, large land occupation and easy leakage and pollution.
Large fluctuation of water quality and water volume: It changes greatly with the construction progress, making conventional equipment difficult to maintain stable compliance continuously.
Tight on-site land use: Large civil treatment facilities cannot be built, requiring integrated and movable equipment.
III. Customer Requirements and Treatment Targets
Combined with the construction management and environmental protection requirements of China Railway Major Bridge Engineering Group, the core requirements of the project are clarified:
The effluent shall comply with the Integrated Wastewater Discharge Standard GB 8978 and local regulations, available for reuse or pipeline discharge.
Sludge reduction: Deep dewatering by plate and frame filter press to control the water content of mud cake ≤ 60%, facilitating transportation and compliant disposal.
Adopt integrated Wastewater treatment equipment with small land occupation, fast hoisting and short construction period, adapting to temporary working conditions of construction sites.
Fully automatic system operation with simple operation and low maintenance, reducing on-site management costs.
Clean water reuse: The treated effluent is used for dust reduction, vehicle washing and greening to save tap water and realize resource utilization.
Xi'an DIEN Water Treatment Helps China Railway Major Bridge Engineering Group Achieve Environmental Compliance and Reuse
IV. Customized Solution of Xi'an DIEN Water Treatment
In view of the characteristics of bridge construction sites, DIEN adopts the process of classified collection, graded treatment and resource reuse, with core equipment working in combination:
Pretreatment system: Grating + regulating tank + oil separation sedimentation tank to remove large particle sundries and floating oil, and balance water quality and water volume.
Integrated Wastewater Treatment Equipment (Click to view equipment details): Integrated with A/O biochemical, sedimentation, filtration and disinfection units, it efficiently degrades COD and ammonia nitrogen with clear and compliant effluent, supporting hoisting in place and rapid commissioning.
Sludge conditioning and solid-liquid separation: After flocculation and conditioning, the sludge enters the plate and frame filter press for high-pressure dewatering. The filtrate flows back for treatment, and the dried mud cake is easy to transport.
Intelligent control system: PLC full-automatic operation, automatic dosing, automatic sludge discharge, filter press linkage and fault alarm, realizing unattended operation.
Reuse system: Collect and reuse compliant clean water to reduce project water cost and realize green construction.
V. Project Treatment Effect
After the project was put into operation, the treatment effect is remarkable with all indicators stably meeting the standard:
Stable Wastewater compliance: Indicators such as SS, COD and ammonia nitrogen are better than discharge standards, passing environmental inspections smoothly.
Efficient sludge dewatering: Plate and Frame Filter Press (Click to view equipment details) turns sludge into dried mud cake with volume reduced by more than 70%, featuring convenient transportation and no secondary pollution.
Efficient clean water reuse: The reuse rate is ≥35%, saving a large amount of tap water every year with obvious cost reduction and efficiency improvement.
Reliable and durable equipment: The integrated Wastewater treatment equipment is impact-resistant and civil-construction-free, adapting to the complex environment of construction sites.
Rapid implementation: It only takes a few days from site entry to water supply without affecting the progress of main construction.
VI. Customer Feedback
Project person-in-charge of China Railway Major Bridge Engineering Group commented: The solution of Xi'an DIEN Water Treatment is highly targeted, fast to implement and stable in effect. The combination of integrated Wastewater treatment equipment and plate and frame filter press perfectly solves the problems of Wastewater and sludge. The system operates fully automatically with simple operation and maintenance, which not only meets environmental compliance requirements, but also realizes clean water reuse and sludge reduction. With professional efficiency and timely response, the DIEN team is a trustworthy long-term partner for water treatment in bridge engineering.
Xi'an DIEN Water Treatment focuses on one-stop solutions such as construction site integrated Wastewater treatment, sludge solid-liquid separation, plate and frame filter press, construction wastewater reuse and domestic Wastewater treatment, serving large central state-owned enterprises including China Railway Group, China State Construction and China Communications Construction. With core advantages of rapid deployment, stable compliance, high cost performance and perfect after-sales service, it has become a benchmark brand in the field of engineering water treatment in Northwest China. If your project is faced with problems such as substandard Wastewater, difficult sludge treatment, limited land use and environmental acceptance, welcome to contact Xi'an DIEN Water Treatment for free survey, customized solutions and quick quotation, and escort project environmental protection with professional equipment and mature technology.
