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9 cubm/hr 3.00m long fine bubble air diffuser for waste water treatment

Fine bubble high performance air diffusers. Semi flexible diffuser construction 300cm long 32mm diameter. Maximum recommended air flowrate is 10 cubic metres of air per hour. Materials of construction are plastic with 316 stainless steel end fittings, aslo fitted with non return valve in diffuser. Diffuser contains its own internal fused silica bead ballast. End fittings are 1/2" acetyl plastic as standard.

The Dryden Air diffuser is the leading air diffuser used in UK aquaculture, treatment of leachate water on landfill sites, sewerage treatment and numerous other applications.

OEM and dealer enquires welcomed
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AFM grade 1 filtration media

AFM (Advanced Filtration Media) grade 1 is the standard sized AFM media equivalent to 16 x 30 grade sand. M

Supplied in 25kg sacks, grade 1 particle size 0.5mm to 1.10mm. Media should be used on top of a layer of grade 2 AFM.

Price is per 25kg sack

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Oxygen standard probe

High performance, very robust galvanic oxygen probe for the measurment of dissolved oxygen in water, waste water and air. Completely sealed internals, so there is no risk of insulation failure, heavy duty Sub Sea cable, high mv out-put 6.5 mv to approx 1mg/l dissolved oxygen. Ideal probe for the Dryden Aqua, AquaTraul system or your own oxygen monitors such as multichannel or stand-alone PLC based systems.

The probe is supplied with 5 meters of cable (alternative lengths available), pack of 5 membranes and 50ml of electrolyte.

Please enquire about discounts for orders of 10 or more.
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Aquaculture | Water Technology | Environmental Products.....delivered worldwide

Biofiltration systems

dry1 | Biofiltration systems

Stainless steel biofilter with lid rated at 50cubm/hr

Ref: 4.7.16

Price: £6,059.00 / €6,967.85 (Excluding VAT at 17.5%)

Biofilter manufactured in 316 stainless steel. Dimmensions are 3m in height, 1.5m in width and 1.5m in length. The filter must be operated as a trickling down-flow unit. The water flowrate when used as a biofilter can be between 10 and 80 cubic metres of water per hour.

An oxygen injection point is fitted in the biofilter which allows the filter to also act as a non pressurised oxygen contactor. The filter can easily raise the dissolved oxygen content to 150% saturation, and the extra oxygen helps to improve the performance of nitrifying bacteria and heterotrophic COD reduction.

COD loadings (guideline)
5 to 10 deg C 2 kg /day
10 to 15 deg C 4 kg / day
15 to 20 deg C 10 kg /day

Fish Biomass loadings
Maximum biomass loading on the filter depends upon water quality and temperature, the figures presented below are for guidance assuming that the water is not loaded with waste feed and faecal matter.

5 to 10 deg C 500 kg
10 to 15 deg C 750 kg
15 to 20 deg C 1000 kg
20 to 25 deg C 1500 kg
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Stainless steel biofilter with lid rated at 100cubm/hr

Ref: 4.7.18

Price: £11,090.00 / €12,753.50 (Excluding VAT at 17.5%)

Biofilter manufactured in 316 stainless steel. Dimmensions are 3m in height, 1.5m in width and 3.0m in length. The filter must be operated as a trickling down-flow unit. The water flowrate when used as a biofilter can be between 80 and 150 cubic metres of water per hour.

An oxygen injection point is fitted in the biofilter which allows the filter to also act as a non pressurised oxygen contactor. The filter can easily raise the dissolved oxygen content to 150% saturation, and the extra oxygen helps to improve the performance of nitrifying bacteria.

Maximum biomass loading on the filter depends upon water quality and temperature, the figures presented below are for guidance assuming that the water is not loaded with waste feed and faecal matter.

5 to 10 deg C 1000 kg
10 to 15 deg C 1500 kg
15 to 20 deg C 2000 kg
20 to 25 deg C 3000 kg
more information

dry1 > Biofiltration systems

Prices shown are all ex-works Edinburgh Scotland