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DC HDPE 75 для рэцыркуляцыйных сістэм аквакультуры
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.
Description
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.
DC HDPE 75 для рэцыркуляцыйных сістэм аквакультуры
75-адтулінавы носьбіт біяплёнкі MBBR з вертыкальнымі палоскамі ўяўляе сабой носьбіт біяплёнкі звышвысокай шчыльнасці, распрацаваны для максімальнай інтэнсіфікацыі працэсаў у перадавых ачыстках сцёкавых вод. Яго запатэнтаваная геаметрыя аб'ядноўвае 75 дакладна размешчаных скразных адтулін з восева выраўнаванымі вертыкальнымі прыўзнятымі палоскамі, ствараючы трохмерную рашотчатую структуру, якая максімізуе плошчу абароненай паверхні (>1600 м²/м³), захоўваючы пры гэтым >94% пустой прасторы. Выраблены з нанаармаванага кампазіта HDPE/PP, носьбіт забяспечвае выключную механічную трываласць і ўтрыманне біяплёнкі пры экстрэмальных гідраўлічных нагрузках (да 8 м³/м²·г). Шахматна размешчаныя выступы ў выглядзе палосак ствараюць кантраляваную мікратурбулентнасць, паляпшаючы растварэнне кіслароду і абараняючы біямасу ад зруху ў высокахуткасных рэактарах.
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.
запыт ЦытавацьWhy is the DC 75 HDPE MBBR MEIDA suitable for use in high-density recirculating aquaculture systems?
1. Высокая ўдзельная плошча паверхні
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.
2. 75-дзірачная структура для стабільнага росту біяплёнкі
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. Выдатная прадукцыйнасць флюідызацыі
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.
6. Выраблены з 100% белага натуральнага HDPE
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. Доўгі тэрмін службы
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.
8. Гнуткі каэфіцыент напаўнення
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.
Тэхнічныя характарыстыкі
| Параметр | спецыфікацыя | блок | Заўвагі |
| мадэль | 75-адтулінны пераносчык MBBR | - | Стандартная геаметрыя галіны |
| Matériau | Поліэтылен высокай шчыльнасці (HDPE) | - | УФ-стабілізаваны, харчовы |
| колер | белы | - | стандарт |
| Форма | Цыліндрычны з 75 унутранымі папярочнымі каналамі | - | Аптымізаваны паток і абарона біяплёнкі |
| Дыяметр (Ø) | 25 | mm | Намінальны памер |
| Вышыня (H) | 4 | mm | - |
| Удзельная плошча паверхні | >1600 м²/м³ | ||
| Індывідуальная шчыльнасць носьбіта | 0.94-0.97 | г / см³ | |
| Тэрмін службы | > 15 | гадоў |
Тыповыя сферы прымянення DC 75 у аквакультуры
DC 75 is suitable for biological filtration in recirculating aquaculture systems, especially for projects requiring stable nitrification and ammonia-nitrogen control.
Тыповыя дадаткі ўключаюць:
● Рэцыркуляцыйныя сістэмы аквакультуры
● Біяфільтры RAS
● Medium and large fish farm biofiltration systems
● Выдаленне аміячнага азоту з вады аквакультуры
● High-density indoor aquaculture systems
● Сістэмы вырошчвання тылапіі
● Сістэмы вырошчвання фарэлі
● Сістэмы вырошчвання крэветак
● Salmon hatchery and grow-out systems
● Fish fry and juvenile fish culture systems
● Аквапонічныя сістэмы біяфільтрацыі
● 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.
запыт ЦытавацьQuestions fréquemment posées
Q: Вы гандлёвая кампанія ці вытворца?
A: Мы фабрыка.
Q: Як доўга ваш тэрмін пастаўкі?
A: Як правіла, гэта 10-20 дзён, калі тавар ёсць у наяўнасці. або гэта 30-45 дзён, калі тавару няма на складзе, гэта ў залежнасці ад колькасці.
Пытанне: Вы даяце ўзоры? гэта бясплатна ці дадаткова?
A: Так, мы можам прапанаваць узор бясплатна, кошт дастаўкі аплачвае пакупнік.
Пытанне: Якія Вашы ўмовы аплаты?
A: Т/ТЛ/К.
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.
