Denitrification Deep Bed Filter DeniFil™

Sump Cover

Sump cover gap design considers length and width of the filter to ensure water distribution, which are evenly distributed at the bottom of the block.

Air Distribution System

The filter is equipped with a square air distribution main pipe and laterals with orifices, forming a high-resistance air distribution system. These pipes are made of stainless steel 304 or higher-grade materials.

Underdrain Block

DAV-Block Chassis Block

A combination of three horizontal and two vertical channels forms a five-channel system to ensure a more even distribution of air and water.
The disc-shaped design offers superior stability, effectively mitigating the risk of traditional concrete filter bricks overturning.
Simple installment and no vulnerable parts;
A nominal open area of 4%, not prone to clogging.
Maintenance-free for life, with a lifespan extending up to 50 years.

Gravel Layer

The support layer uses natural gravel

Media Layer

The filter media consists of high-quality natural silica sand with an effective particle size of 2-3mm. Known for its high silica content, low impurities, and superior abrasion resistance, this sand ensures a lifespan exceeding 10 years. With a media height ranging from 1.83-2.44m, it effectively prevents breakthrough occurrences. Its homogeneous composition allows solid impurities to go through the surface layer of the filter bed and penetrate deep into the media, optimizing the utilization of the filter bed depth. Consequently, this reduces the frequency of backwashing and extends the filtration cycle.

Curved Influent Weir

Perfect curved influent weir design significantly reduces dissolve oxygen increase caused by head fall and noise.

Filter Bed Control System

We've designed a smart control system for managing auxiliary equipment of the filter, with a user-centric approach in mind. This system allows users to customize it according to their specific requirements.

Peripheral Auxiliary Equipment

Blowers, pumps, pneumatic valves, manual valves, mixers, air compressors, instruments, etc.

Clear Well and Mud Well

Clear Well and Mud Well

Carbon Source Dosing System

The carbon source dosing system utilizes a combination of feedforward and feedback control methods to precisely administer carbon dosing. This method regulates the dosing pump to ensure precise carbon source addition, avoiding both excess and insufficient carbon dosing.