HDPE Bio Block Filter Media_PINGXIANG BESTN CHEMICAL PACKING CO.,LTD

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HDPE Bio Block Filter Media

Model Number：BS-PBB

Place of Origin：China

Keywords：Plastic bio block,plastic tube set media,3D grid bio filter,mesh spriklers

Bio Block is a porous biological filter medium used in water treatment and aquaculture systems. It provides a large surface area for beneficial nitrifying bacteria to grow, which break down ammonia, nitrites and organic pollutants in water, thus purifying water quality and maintaining a stable aquatic environment.

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HDPE Bio Block is a modular structured biological filter medium made of virgin High-Density Polyethylene (HDPE). It is assembled by thermally welded mesh plastic tubes into solid cubic blocks. As a fixed biofilm carrier, it supplies massive living space for beneficial microorganisms to degrade water pollutants in all water treatment and aquaculture systems.

1. Material Property

Strong corrosion resistance, acid and alkali resistance, salt resistance: resistant to domestic sewage, chemical wastewater, seawater aquaculture water bodies, and not degraded by acid, alkali, salt, or microorganisms;
Anti UV and anti-aging: add anti UV additives, the outdoor pool and surface filter can be used stably for more than 20 years, and are not prone to embrittlement and cracking;
Non toxic food grade: native HDPE without plasticizers, safe pre-treatment of aquatic, landscape, and drinking water without secondary pollution;
Lightweight, high-strength, self-supporting: The module has a light weight and can be stacked without the need for brackets. It can be directly stepped on for construction and will not deform under long-term water flow impact.

2. Special Structural Design

Ultra high specific surface area: Mesh hollow network tube+rough outer wall, specific surface area can reach 150-300 ㎡/m ³, greatly improving microbial adhesion;
Ultra high porosity, breathable and water permeable: Through type three-dimensional pores, oxygen is fully transferred to the biofilm during aeration, significantly improving nitrification efficiency;
Self cleaning and anti clogging: Aging and shedding biofilm fragments can freely pass through the pipe network with water flow, without sludge accumulation or frequent backwashing;
Modular assembly: Standard block units that can be freely cut and stacked, suitable for any size of biochemical tanks, filtration boxes, and drip filtration towers;
Multi layer three-dimensional membrane hanging: dual membrane hanging inside and outside the tube, synchronously completing aerobic nitrification, local anoxic denitrification, and synchronously removing ammonia nitrogen and total nitrogen COD.

3.Features & Function

Fast biofilm formation speed, stable biofilm can be formed within 3-7 days of water supply;
Resistance to water quality shock load, stable effluent quality when sewage concentration fluctuates;
Low operation and maintenance costs, extremely low risk of blockage, significantly reducing manual cleaning and aeration energy consumption;
Small footprint, equivalent processing capacity saves 35% of pool space compared to volcanic rock and ceramic filter media

Specification

Item	Technical Index
Material	Virgin HDPE, UV stabilizer added
Color	Black
Density	0.96~0.98 g/cm³
Service Life	≥20Years
Acid & Alkali Resistance	pH 3~12
Max Bearing Load	8000 kg/㎡
Void Ratio	72% ~ 95%
Flow Area	55% ~ 70%
Surface	Rough grid outer wall, quick film coating
Customization	length, width, height, pipe diameter, and overall cubic size can be customized

Model	Tube OD	Surface Area	Weight per CBM	Recommend Application
70	70 mm	150 ㎡/m³	45 kg/m³	Landscape lake, fish pond, rainwater purification, low load domestic sewage
55	55 mm	200 ㎡/m³	60 kg/m³	Municipal sewage, integrated equipment, RAS cycle aquaculture
50	50 mm	250 ㎡/m³	70 kg/m³	Slaughter/food wastewater, high ammonia nitrogen water bodies, nitrification enhancement
35	35 mm	300 ㎡/m³	100 kg/m³	High density seedling cultivation, small-scale biochemical filter, deep denitrification

Working Principle

Bio Block is a porous biological carrier that works based on biofilm technology to purify water.

Biofilm Attachment

The porous structure and large surface area of Bio Block provide an ideal habitat for beneficial microorganisms such as nitrifying bacteria, denitrifying bacteria and heterotrophic bacteria to attach and grow, forming a thin and active layer called biofilm.
Adsorption and Degradation

As contaminated water flows through the Bio Block, organic matter, ammonia nitrogen, nitrite and other pollutants are adsorbed by the biofilm. Microbes in the biofilm decompose these harmful substances through metabolism.
Purification Process

Heterotrophic bacteria break down organic pollutants, reducing COD and BOD.
Nitrifying bacteria convert toxic ammonia and nitrite into nitrate.
Denitrifying bacteria transform nitrate into nitrogen gas, which is released into the atmosphere.

Application Scenarios

1. Aquaculture & Recirculating Aquaculture Systems (RAS)

High‑density fish, shrimp, crab and seafood farming ponds
Hatchery water purification
Tail water treatment for aquaculture farms
Koi ponds & ornamental fish systems

2. Municipal & Domestic Sewage Treatment

Integrated packaged sewage treatment plants
Septic tank upgrading & renovation
Small decentralized sewage treatment stations
Trickling filters & biofilters

3. Industrial Wastewater Treatment

Food & beverage processing wastewater
Slaughterhouse & livestock wastewater
Textile & dyeing wastewater
Agricultural processing wastewater
Light chemical & pharmaceutical wastewater

4. Landscape Water & Ecological Water Restoration

Artificial lakes, rivers and wetlands
Park ponds, fountain water systems
Scenic reservoir water purification
Black and odorous water treatment

5. Greywater Reuse & Rainwater Treatment

Domestic greywater recycling (washing, bathing, cleaning)
Rainwater harvesting & purification
Irrigation water treatment

6. Drinking Water Pretreatment

Reservoir & river raw water purification
Removal of ammonia, odor and organic matter

7. Biological Waste Gas Treatment

Biofilters for odor and VOC treatment
Waste gas from sewage stations, composting plants