PDCPD Sewage Treatment Tank

PDCPD Sewage Treatment Tank

The PDCPD sewage purification tank is an environmentally friendly device manufactured using a new high-performance thermosetting polymer material, polydicyclopentadiene (PDCPD). It is primarily used for pretreatment, water reuse, and discharge compliance of domestic, industrial, and some agricultural wastewater. It integrates multiple functions, including physical filtration, biochemical reactions, and sedimentation separation. It boasts lightweight, high-strength, corrosion-resistant, easy installation, and low maintenance. It is a significant upgrade and alternative to traditional concrete tanks and fiberglass-reinforced plastic purification equipment, and is particularly suitable for wastewater treatment applications requiring enhanced durability, transport efficiency, and chemical resistance.

- PDCPD Material Properties
PDCPD material's unique three-dimensional cross-linked network structure provides numerous performance advantages not readily available in traditional plastics and metals:
1. Impact Resistance
PDCPD's impact resistance is 5-10 times that of ordinary fiberglass reinforced plastics (FRP). It resists brittle cracking even at low temperatures and can withstand external shocks such as vehicle overrun and construction collisions, effectively reducing the risk of equipment damage during transportation and installation.
2. Corrosion Resistance
Sewage often contains corrosive media such as acids, alkalis, salts, oils, and organic solvents. PDCPD exhibits strong chemical inertness to these media and will not corrode, swell, deform, or decompose even after prolonged immersion, making it far superior to materials like FRP and PVC.
3. Lightweight, High-Strength, and Easy Installation
PDCPD's specific gravity is only one-fifth that of metal, yet it possesses superior structural strength, capable of withstanding groundwater pressure and backfill soil pressure. Its overall light weight makes it easy to transport, hoist, and quickly install. 

4. Smooth Surface, Anti-adhesion, and Easy to Clean
PDCPD's dense and smooth surface resists the adhesion of microorganisms and dirt, reducing problems such as uneven biofilms, scaling on pipe walls, and pipe blockages, significantly reducing the workload for routine maintenance and cleaning.
5. Weather-Resistant and Long-Lasting
PDCPD is resistant to UV rays, temperature fluctuations, and aging. It withstands long-term outdoor use without cracking, chalking, or fading, resulting in a product lifespan of over 20 years.
These properties make PDCPD a suitable material for environmentally friendly equipment such as sewage treatment tanks, particularly in areas subject to high corrosion, high loads, heavy rainfall, and drastic temperature fluctuations.

- Structural Design
The overall structure of a PDCPD sewage treatment tank is typically a multi-chamber integrated design, primarily comprising a regulating tank, anaerobic tank, aerobic tank, sedimentation tank, and disinfection tank. Depending on the treatment process, these tanks can implement multi-stage biochemical reactions and purification processes. Their design follows the basic "interception - decomposition - sedimentation - purification" approach. The main operating principles are as follows:
1. Primary Filtration and Conditioning
Sewage first flows into the regulating tank, where large particles are removed through sedimentation. This also mitigates fluctuations in water quality in subsequent treatment units, stabilizes the flow rate, and prevents sudden increases in water volume from causing system load imbalances.
2. Anaerobic Fermentation
Sewage that has undergone primary filtration enters the anaerobic tank, where facultative aerobic or denitrifying bacteria decompose organic matter in an oxygen-free environment, releasing ammonia nitrogen and breaking down proteins, thereby reducing the burden on subsequent treatment.
3. Aerobic Degradation
Sewage in the aerobic tank is supplied with oxygen through an aeration system, activating the metabolic activity of aerobic microorganisms and accelerating the oxidative decomposition of organic pollutants, achieving COD and BOD removal and promoting nitrogen and phosphorus removal. 

4. Sedimentation and Clarification Stage
Biologically treated wastewater enters the sedimentation tank, where residual suspended solids, microbial debris, and other insoluble matter settle to the bottom, forming sludge. The clear liquid then enters the next treatment stage.
5. Disinfection and Discharge Stage
In the disinfection tank, chlorine or ultraviolet light is added to sterilize the effluent, removing harmful microorganisms such as bacteria and viruses. The clear water is then discharged or recycled through the outlet.
The entire treatment process achieves a triple purification process: physical, chemical, and biological. The effluent meets national or local discharge standards. Some systems can also be integrated with constructed wetlands or membrane treatment systems to enable water reuse or landscaping irrigation.

- Application Scenario
Due to its excellent performance and adaptability, PDCPD sewage treatment tanks are widely used in the following scenarios:
1. Urban and rural residential and villa areas
They are suitable for areas without centralized sewage pipe networks or with limited drainage capacity, such as new rural areas, remote mountainous areas, and tourist towns. They provide on-site sewage treatment solutions for single or multiple households, reducing environmental burdens.
2. Schools, hospitals, camps, and other institutions
These locations have high traffic volumes but limited space. PDCPD sewage treatment tanks offer flexible installation, a short construction period, and require no complex civil engineering foundations, making them easy to deploy quickly and meeting daily sewage discharge standards.
3. Industrial parks and factory internal drainage systems
For lightly polluted industrial wastewater, such as washing wastewater, cooling water, and mixed domestic sewage, PDCPD equipment can serve as a front-end pretreatment facility, helping companies achieve self-treatment of wastewater to meet standards.
4. Highway service areas and temporary construction camps
PDCPD sewage treatment tanks are easy to transport and resistant to pressure and shock, making them suitable for deployment in highly mobile and periodically used locations, such as temporary construction camps, remote gas stations, and highway toilets. 

5. Rural Toilet Renovation and the "Toilet Revolution" Project
To improve rural sanitation, PDCPD equipment, with its excellent sealing, corrosion resistance, and long service life, has become an easy-to-install and maintain solution for rural toilet renovation projects.

- Maintenance Management
Using PDCPD wastewater treatment tanks not only offers significant advantages in terms of material performance, but also demonstrates high efficiency in daily operation and maintenance:
Long maintenance-free cycle: Because the equipment itself is virtually corrosion-resistant and crack-proof, it can operate normally for over ten years without major repairs.
Low cleaning frequency: The tank's smooth interior surface prevents sludge from adhering, slowing down silt accumulation.
Easy operation: Most PDCPD treatment tanks utilize a modular, integrated design with an automated control system for easy operation.
Low operating costs: No large amounts of chemical additives are required, and aeration consumes little electricity, making it suitable for long-term, low-energy operation.
Short installation time: Compared to traditional concrete or brick tanks, PDCPD equipment typically takes less than three days from arrival to commissioning.