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DC 38 For Pulp And Paper Industry Wastewater Secondary Treatment
Select suitable MBBR media, such as DC 38. High-quality media should possess characteristics such as a large specific surface area, light weight and corrosion resistance, to ensure uniform air-water mixing; the air flow rate and aeration method should be adjusted appropriately.
Description
How can biofilm blockages and agglomeration of MBBR media be addressed in a biochemical reactor?
Select suitable MBBR media, such as DC 38. High-quality media should possess characteristics such as a large specific surface area, light weight and corrosion resistance, to ensure uniform air-water mixing; the air flow rate and aeration method should be adjusted appropriately.
DC 38 For Pulp And Paper Industry Wastewater Secondary Treatment
The 38-Hole Vertical Stripe Protrusion MBBR Media is a high-efficiency biofilm carrier engineered for balanced performance in municipal and industrial wastewater treatment. Its optimized geometry features 38 strategically distributed through-holes combined with axially aligned vertical raised stripes, creating turbulent flow patterns that enhance mass transfer while protecting biomass from shear forces. Manufactured from UV-stabilized high-density polyethylene (HDPE), this media delivers a protected surface area of ≥800m²/m³ with exceptional void space (>95%) to prevent clogging. The striped protrusions create microhabitats for robust biofilm development, making it ideal for BOD removal, nitrification, and denitrification processes in MBBR, IFAS, and hybrid reactor systems.
How can the problem of an effective biofilm failing to form for a prolonged period after the addition of packing material, resulting in poor treatment performance, be resolved?
Use hydrophilic-modified DC 38 HDPE media to accelerate biofilm formation; maintain the pH within 7.0–8.5; control dissolved oxygen (DO) at 3–4 mg/L during the initial biofilm formation stage; alternate 15 minutes of aeration with 5 minutes of rest to prevent high-intensity aeration from dislodging the early biofilm; and start with a COD load of ≤0.5 kg/(m³·d), increasing it by 20 per cent every three days.
Request A QuoteWhy choose the DC 38 for industrial and domestic wastewater treatment?
1. High Specific Surface Area
With a specific surface area of more than 800 m²/m³, DC 38 provides abundant attachment space for microorganisms, helping increase the effective biomass in the biological reactor.
2. 38-Hole Biofilm Protection Structure
The 38-hole cylindrical structure provides multiple internal channels and external surfaces for biofilm growth. These protected channels help microorganisms attach more stably and reduce biomass loss caused by aeration or hydraulic scouring.
3. Efficient Mass Transfer Performance
The porous, open structure of DC 38 facilitates thorough contact between wastewater, dissolved oxygen, and the biofilm, allowing oxygen and pollutants to penetrate the biofilm more effectively, thereby improving the efficiency of organic matter degradation and ammonia nitrogen removal.
4. Excellent Fluidization Effect
DC 38 has a density of 0.94–0.97 g/cm³, which is close to that of water. When aerated or propelled by water flow, the packing material remains well suspended and fluidized in the reaction tank, making it unlikely to settle at the bottom of the tank, which helps improve packing utilization and system operational stability.
5. Made from 100% White Virgin HDPE
The DC 38 is made from 100% virgin white HDPE material and offers excellent chemical stability, corrosion resistance, and weather resistance, making it suitable for long-term use in municipal sewage and industrial wastewater treatment systems.
6. Long Service Life
The DC 38 has a service life of up to 15 years, which reduces the frequency of media replacement and lowers the long-term operating and maintenance costs of wastewater treatment systems.
7. Flexible Filling Ratio
The DC 38 has a packing density range of 15%–70% and can be flexibly designed to accommodate different water qualities, organic loads, tank volumes, and effluent requirements, making it suitable for wastewater treatment projects of various scales.
8. Suitable for COD, BOD and Ammonia-Nitrogen Removal
DC 38 provides a stable attachment environment for heterotrophic bacteria and nitrifying bacteria. It is suitable for COD and BOD degradation as well as ammonia nitrogen removal in wastewater treatment, helping to improve the system’s biochemical treatment efficiency.
9. Suitable for High-Load Wastewater Treatment
Because DC 38 has a high specific surface area and a 38-pore structure, it can increase microbial concentration within a limited tank volume, making it suitable for wastewater treatment projects with high loads and stable effluent quality requirements.
10. Suitable for MBBR and IFAS Upgrading
DC 38 can be added to existing biological treatment tanks to increase the microbial concentration and treatment capacity within the system. It is suitable for new MBBR systems, upgrading and retrofitting of existing wastewater treatment plants, and IFAS process upgrade projects.
Technical Specifications
| Parameter | Specification | Unit | Remarks |
| Model | 38-Hole MBBR Carrier | – | Industry-standard geometry |
| Material | High-Density Polyethylene (HDPE) | – | UV-stabilized, food-grade |
| Color | white | – | Standard |
| Shape | Cylindrical with 38 internal cross-channels | – | Optimized flow & biofilm protection |
| Diameter (Ø) | 25 | mm | Nominal size |
| Height (H) | 10 | mm | – |
| Specific Surface Area | >800m2/m3 | ||
| Individual Media Density | 0.94-0.97 | g/cm³ | |
| Service Life | > 15 | years |
Typical Applications of DC 38
DC 38 is suitable for biological wastewater treatment systems requiring stable biofilm growth, efficient organic matter removal and ammonia-nitrogen control.
Typical applications include:
● Municipal wastewater treatment plants
● Domestic sewage treatment systems
● Industrial wastewater treatment systems
● Food and beverage wastewater treatment
● Chemical wastewater treatment
● Printing and dyeing wastewater treatment
● Pulp and paper wastewater treatment
● Slaughterhouse wastewater treatment
● Landfill leachate treatment
● Hotel, resort and community wastewater treatment
● School, hospital and industrial park wastewater treatment
● Decentralized sewage treatment systems
● MBBR biological treatment systems
● IFAS process upgrading
● Existing wastewater treatment plant capacity expansion
● COD, BOD and ammonia-nitrogen removal systems
How to address the issue of media breaking down after several years of operation, with fragments entering subsequent treatment units
Select high-quality HDPE media manufactured by Decycle, with a compressive strength of ≥25 N per particle and an outdoor service life of ≥15 years. Carry out regular inspections to check for media wear and tear, replacing 10–20 per cent of the old media annually whilst mixing new and old media together. Any damaged media should be retrieved and removed promptly upon discovery.
Request A QuoteFrequently Asked Questions
Q: Are you a trading company or manufacturer?
A: We are factory.
Q: How long is your delivery time?
A: Generally, it is 10-20 days if the goods are in stock. or it is 30-45 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? is it free or extra?
A: Yes, we could offer the sample for free charge, there are delivery cost to be paid by buyer.
Q: What is your terms of payment?
A: T/T L/C.
