Jingxi underground water purification plant is China's first all-land buried sewage treatment plant, the project uses a double all-buried design, greatly saving the area, and the surface into a garden-style park for the sewage treatment plant The relationship with the citizens provides a new idea.
The first buried MBR membrane sewage treatment plant Jingxi underground water purification plant to achieve "harmony between plant"
Jingxi underground water purification plant started in September 2009, built by the end of June 2010 through water, is China's first all-buried wastewater treatment plant. Design capacity of 100,000 tons / day, covers an area of ​​1.83 hectares, serving a population of about 130,000.
Using the current international advanced MBR process, ultra-micro filtration membrane separation process to replace the traditional activated sludge treatment of gravity settling process. MBR membrane material is polyvinylidene fluoride (PVDF) hollow fiber membrane. After a series of treatment, the effluent quality is better than Grade A standard, which is mainly used for replenishment of Shahe River.
Process is as follows:
The general process: sewage collected by the pipe network to the plant by pumping station, after pretreatment (fine grid, aerated grit chamber, fine grille); and then into the MBR biochemical reaction tank; MBR membrane after treatment into the separation tank, Through the MBR membrane to achieve mud separation; the last after MBR membrane filtered water from the production pump and UV disinfection sent to the outside plant.
First visited the blower room, the water purification plant imported magnetic levitation centrifugal blower with high efficiency and energy saving, low noise, reliable operation, a total of eight blowers, of which four for the biochemical reaction and the other four for the membrane Pool, all three for a reserve.
Engineering Design Features:
1. All buried intensive arrangements
Jingxi underground water purification plant construction in the more densely populated areas, the land area is very tight. The project uses a double-layer all-buried design, which greatly saves land and builds the surface into a park-style park, which provides a new idea for the sewage treatment plant to deal with citizens.
At the same time, each structure of Jingxi underground water purification plant is arranged in a group structure and is optimized according to the following principles: Each control structure has a frame structure; as far as possible, no space is left between the control structures for direct connection, saving The amount of interconnection between buildings, the formation of a group structure to save floor space and project investment.
2. Advanced A2 / O-MBR water treatment system
The A2 / O-MBR process with simultaneous denitrification and dephosphorization combined with A2 / O process and membrane separation technology further expands the application range of MBR, making MBR more widely used in municipal wastewater reclamation and utilization. At the same time, high concentrations of MLSS, independently controlled HRT and SRT, reflux ratio, and sludge loading rates in the A2 / O-MBR process can also result in a difference from the conventional A2 / O process influences.
3 advanced instrumentation and self-control technology
(1) The centralized management and decentralized control system of Jingxi Sewage Treatment Plant consists of a central control station, a plurality of on-site control stations and their sub-stations and high-speed data lanes to ensure that the operation and control of the sewage treatment plants are flexible and adjustable. Simple, stable and reliable
(2) set online testing instruments, monitoring, security infrared, fire alarm and other automatic control system.
(3) Add a modern electric power automatic monitoring system to automatically monitor the high and low voltage power distribution systems, transformers, DC screens and UPS power systems of Jingxi WWTP (high-voltage system controllable), and realize the automation and improvement of the power system Reliability of power distribution system operation.
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