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HDPE 75 DC برای سیستمهای آبزیپروری چرخشی
Add the media in 2–3 batches to avoid accumulation caused by adding too much at once. Carry out ‘sealed aeration’: stop water inflow and outflow during the addition process and carry out continuous aeration (for approximately 5–8 days). At the start of the sealed aeration period, crushed powdered feed may be added in proportion to the media as a nutrient source. Specialised aerobic denitrifying bacterial inoculants may be added to help these bacteria colonise the media preferentially.
توضیحات:
How can biofilm be established more quickly on MBBR media in recirculating aquaculture systems?
Add the media in 2–3 batches to avoid accumulation caused by adding too much at once. Carry out ‘sealed aeration’: stop water inflow and outflow during the addition process and carry out continuous aeration (for approximately 5–8 days). At the start of the sealed aeration period, crushed powdered feed may be added in proportion to the media as a nutrient source. Specialised aerobic denitrifying bacterial inoculants may be added to help these bacteria colonise the media preferentially.
HDPE 75 DC برای سیستمهای آبزیپروری چرخشی
مدیای MBBR با برآمدگی نواری عمودی ۷۵ سوراخه، یک حامل بیوفیلم با چگالی فوقالعاده بالا است که برای حداکثر تشدید فرآیند در تصفیه پیشرفته فاضلاب طراحی شده است. هندسه ثبت اختراع شده آن، ۷۵ سوراخ داخلی با چیدمان دقیق را با نوارهای عمودی برجسته محوری ادغام میکند و یک ساختار شبکهای سهبعدی ایجاد میکند که مساحت سطح محافظتشده (بیش از ۱۶۰۰ متر مربع بر متر مکعب) را به حداکثر میرساند و در عین حال بیش از ۹۴٪ فضای خالی را حفظ میکند. این مدیا که از کامپوزیت HDPE/PP تقویتشده با نانو ساخته شده است، استحکام مکانیکی استثنایی و حفظ بیوفیلم را تحت بارهای هیدرولیکی شدید (تا ۸ متر مکعب بر متر مربع بر ساعت) ارائه میدهد. برآمدگیهای نواری پلکانی، ریزگردش کنترلشدهای ایجاد میکنند که انحلال اکسیژن را افزایش داده و از زیستتوده در برابر برش در راکتورهای با سرعت بالا محافظت میکند.
What should be done about MBBR media accumulation and poor fluidisation in recirculating aquaculture systems?
Ensure uniform aeration, as this provides the driving force for media fluidisation. Check whether the aeration discs or pipes are blocked or unevenly distributed. An excessively high packing density (e.g. exceeding 40 per cent) is a common cause of agglomeration. This should be dynamically adjusted according to the water quality load; a packing density of around 30–35 per cent is generally recommended. Check whether the media retention screens are blocked by biofilm or debris.
درخواست نقل قولWhy is the DC 75 HDPE MBBR MEIDA suitable for use in high-density recirculating aquaculture systems?
۱. سطح ویژه بالا
DC 75 has a specific surface area of >1,600 m²/m³, providing ample attachment space for nitrifying bacteria, which helps improve ammonia-nitrogen removal efficiency in recirculating aquaculture systems and maintain a more stable water quality environment.
۲. ساختار ۱۹ سوراخه برای رشد پایدار بیوفیلم
The DC 75 features a 75-hole structure that provides microorganisms with abundant internal channels and external attachment surfaces, promoting more uniform and stable biofilm growth while reducing biofilm loss caused by water flow or aeration.
3. Suitable for Nitrification in RAS Biofilters
In recirculating aquaculture systems, fish waste and uneaten feed continuously produce ammonia nitrogen, which must be continuously removed through biological filtration. The DC 75 provides a favorable environment for nitrifying bacteria to attach and grow, helping to convert harmful ammonia nitrogen into less toxic substances and thereby maintaining stable water quality in the aquaculture system.
4. عملکرد عالی سیال سازی
DC 75 has a density of 0.94–0.97 g/cm³, which is close to that of water. When driven by aeration or water circulation, the media can maintain a good state of suspension and fluidization within the biological filter, enabling sufficient contact between the aquaculture water, dissolved oxygen, and the biofilm, thereby improving the efficiency of biological filtration.
5. Commonly Used in RAS Systems
Due to its high specific surface area, stable structural design, and excellent biofilm formation properties, DC 75 is a commonly used biological filter media in recirculating aquaculture systems and is particularly suitable for projects with high requirements for nitrification efficiency and ammonia-nitrogen control.
۵. ساخته شده از ۱۰۰٪ HDPE ویرجین سفید
The DC 75 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 recirculating aquaculture systems and biological filters at fish farms.
7. عمر طولانی
The DC 75 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 recirculating aquaculture systems.
۷. نسبت پر شدن انعطافپذیر
The fill rate of the DC 75 ranges from 15% to 65% and can be flexibly adjusted based on the species being farmed, stocking density, feed intake, ammonia-nitrogen load, and biological filter design requirements, making it suitable for recirculating aquaculture systems of various scales.
9. Suitable for Medium and Large Biofilters
The DC 75 has dimensions of Φ25×4 mm. Combined with its high specific surface area, this makes it suitable for use in medium- to large-scale RAS biofilters, and it is particularly well-suited for projects with high requirements for biological filtration capacity and long-term operational stability.
مشخصات فنی
| پارامتر | مشخصات | واحد | سخنان |
| مدل | حامل MBBR هشت سوراخه | - | هندسه استاندارد صنعتی |
| ماده | پلی اتیلن با چگالی بالا (HDPE) | - | تثبیتشده با اشعه ماوراء بنفش، مناسب برای مواد غذایی |
| رنگ | سفید | - | استاندارد |
| شکل | استوانهای با ۸ کانال متقاطع داخلی | - | جریان بهینه و محافظت از بیوفیلم |
| قطر (Ø) | 25 | mm | اندازه اسمی |
| ارتفاع (H) | 4 | mm | - |
| سطح خاص | >1600 متر مربع بر متر مکعب | ||
| تراکم رسانههای فردی | 0.94-0.97 | g / cm³ | |
| خدمات زندگی | > 15 | سال |
Typical Applications of DC 75 in Aquaculture
DC 75 is suitable for biological filtration in recirculating aquaculture systems, especially for projects requiring stable nitrification and ammonia-nitrogen control.
برنامه های معمولی شامل:
● سیستمهای آبزیپروری چرخشی
● بیوفیلترهای RAS
● Medium and large fish farm biofiltration systems
● حذف آمونیاک و نیتروژن در آب پرورش آبزیان
● High-density indoor aquaculture systems
● سیستمهای پرورش تیلاپیا
● سیستمهای پرورش ماهی قزلآلا
● سیستمهای پرورش میگو
● Salmon hatchery and grow-out systems
● Fish fry and juvenile fish culture systems
● سیستمهای بیوفیلتراسیون آکواپونیک
● Land-based aquaculture water treatment systems
How can you tell if biofilm formation has been successful?
Do not rely solely on visual inspection. Biofilm formed within the last 30 days is virtually invisible to the naked eye; only a slight change in the colour of the media may be noticeable. The correct way to assess this is by testing the water quality: when the concentrations of ammonia-nitrogen and nitrite at the outlet of the biological reactor are significantly lower than those at the inlet, this confirms that biofilm formation has been successful and that the biofilm has begun to function.
درخواست نقل قولپرسش و پاسخهای متداول
س: آیا شما یک شرکت تجاری یا سازنده هستید؟
A: ما کارخانه هستیم.
س: مدت زمان تحویل شما چقدر است؟
A: به طور کلی، اگر کالا در انبار باشد، 10-20 روز است. یا اگر کالا در انبار نباشد 30-45 روز است بر حسب مقدار است.
س: آیا نمونه هایی را ارائه می دهید؟ رایگان است یا اضافی؟
A: بله، ما می توانیم نمونه را به صورت رایگان ارائه دهیم، هزینه تحویل توسط خریدار پرداخت می شود.
س: شرایط خود را پرداخت چیست؟
الف) T/TL/C.
Why is the MBBR media floating on the water’s surface in large quantities rather than sinking?
During the initial period after new MBBR media is introduced, it is normal for it to float due to its hydrophobic surface. The wetting and fluidisation process can be accelerated as follows:
Solution: Sprinkle water onto the surface of the MBBR media. Increase the aeration intensity appropriately to help the media tumble and become wetted.
