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High efficient aeration biological filter tank / HN-HIP BAF

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HN-HIP BAF summary 
HN - HIP BAF high efficient aeration biological filter tank, is developed and optimized on the basis of the traditional BAF technology, the modified polyurethane packing is applied, containing mixed bacterium agent. It can target different types of wastewater efficiently, can be used in the secondary biological treatment, can also be used for deep treatment. It is widely used in municipal wastewater, food, pharmaceutical, printing and dyeing, coal chemical, petrochemical and other industrial wastewater and municipal wastewater upgrading.
Technical characteristics
·The packing in the middle of the pool is in the semi-fluidized state on fixed bed. It can   not only ensure that the outflow SS reaches the standard stably, but also solve the   problem of traditional BAF packing hardening.
·Only air recoil is used, clear water or treated water back washing is not needed. The   back washing volume is greatly reduced and the water yield of the system is improved.
·The packing is rich in unique and highly effective microbial agent, which can directly   treat high concentration wastewater.
·There is no need of backwash fan and backwash pump. Easy to operate and maintain.

Technical advantages
·The biomass of the HighNew special packing is very high. It has fixing effect on   bacteria.It is easy for the microorganism to stick to the membrane and not easy to be   lost.
·The biomass per unit volume is large. Reliability and effluent quality is good.
·Without the foil layer, the whole packing area is full of effective organism.

·The working load is large, the volume of the pool is smaller than the traditional BAF,   and there is no need to build a backwash pool.


HN-HIP BAF process diagram

Comparison Between Conventional BAF and HN-HIP BAF

 

Conventional BAF

HN-HIP BAF

Specific surface area

Normal

High,approximately 10×104m2/m3

Biomass within fillers

Normal

Biomass can be between 25~40g/L

Porosity

>36%

>85%

Surface features

None hydrophilic

Hydrophilic with active groups on the surface

Blocking

Easy to be blocked and requires periodically cleaning

Hardly to be blocked as the carriers are in semi-fluidization form

Life span

Approx. 5 years

Over 10 years

Handling

Difficult to install

Easy to install with directly pour in

Maintenance

Difficult

Easy, carriers is in a light weight

Supporting layer

Required

No supporting layer required (patented)

Performance

Well

Great. With effluent BOD5≤5mg/L, NH4-N≤1mg/L. Over 95% of ammonia nitrogen can be removed.

DO Utilization

Normal

High porosity. balanced water and air distribution. DO transmitting is highly efficient

Back flushing

Back flush by air and water. with very high frequency

Just air flushing. No pump required. Less flushing water is consumed. At the meantime, the blower can be use for multiple purposes includes process aeration, and air scouring. Low flushing frequency: once or twice a week.

Back flushing nozzles  

Required

Not required. A perforated tube is used for back flushing

Capital cost

High

Low, as no requirement for back flushing systems and one blower used for multi purposes.

Back flushing tank

Required

No required


Comparison of the operation between conventional BAF and HN-HIPBAF after years


Aeration of conventional BAF                                                                   Aeration of HN- HIPBIOFILTER


HN-Compound Bacteriological Agent

(1) Function
Specific bacteria: According to the type of pollutants, different bacteria is selected and matched.
Enzyme: According to the type of bacteria, the matched enzyme is added to accelerate the biochemical reaction rate.
Bionutrients: Nutrition for bacterial growth is supplied.

(2) Characteristics
Specialized bacteria are matched according to the water quality, with strong pertinence.
The matched enzymes and nutrients are added to promote the metabolism of bacteria and accelerate the reaction speed.
The domestication time is short, which is 2/3 shorter than the traditional natural culture method.
It is non-toxic, non-corrosive and non-polluting, and no need to increase protection and safety devices.
After one-time inoculation of specific bacteria , it is not necessary to add in normal operation.

Matching of contaminants with bacteria

Se.

contaminants

Bacteria

1

sulfide

Thiobacillus, filamentous sulfur bacteria, photosynthetic sulfur bacteria and colorless sulfur bacteria

2

Benzene series

Pseudomonas fluorescens, Phenylbacillus and Bacillus

3

phenol

Pseudomonas aeruginosa, Acinetobacter Acinetobacter and Trichomonas plexus

4

Nitrogen compounds

Ammonia-oxidizing bacteria, nitrifying bacteria and nitrosobacteria

5

cyanide

Pseudomonas and Penicillium

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