Cyclone MBBR Sewage Treatment Plant

CYCLONE sewage treamnet plant installed underground — CYCLONE sewage treatment plant for domestic or commercial use

CYCLONE is a Moving Bed Biofilm Reactor (MBBR) sewage treatment plant and is ideal for domestic or commercial use. It is perfect for sites with fluctuating use. It is capable of reducing Phosphate to <1mg/L.

CYCLONE is designed to receive wastewater (sewage) and process it so that only a clear effluent is discharged into the environment.

CYCLONE can be used for domestic and commercial sites and is ideally suited for housing, hotels, restaurants, offices, schools and campsites.

The CYCLONE has been tested and certified to EN 12566-3.

Approved by the Environment Agency and on the British Water Certified List of approved sewage treatment plants.

Features of the CYCLONE Sewage Treatment Plant

Extremely clean effluent - up to 97.9% pollutant reduction.
Fully adjustable to suit the number of people using it.
Can operate at only 5% loading.
The CYCLONE sewage treatment plant range is from 25 to 6,000 person.
Lower maintenance costs than Submerged Aerated Filter (SAF) systems.
No internal moving parts.
One piece tank construction - not sectional - no leaking seals.
Simple and cheap maintenance - one piece construction ensures no structural weakness.
Cheap, easy installation.
20 year tank warranty- no metalwork to corrode inside or outside the tank.
Versatile inlet depths - CYCLONE sewage treatment plants can be supplied for different inlet invert levels - 300mm to 5,000mm.
EN 12566-3 2005 Test Report available on request.
Phosphate reduction - incredibly down to <1mg/L. Very important for sensitive watercourses and nutrient neutrality.
Accepted by the Environment Agency for discharge to watercourses and ditches, without the need for a permit, if the installation complies with the General and Binding Environment Agency Rules. If you have a ditch locally, Click here to find out if you own the ditch at the other side of your boundary. You may be surprised.

How the CYCLONE Sewage Treatment Plant Works (see graphic below)

CYCLONE sewage treatment plants have three fundamental stages of treatment:

Primary Settlement.
Aeration.
Final Settlement.

Primary Settlement (Primary Settlement Tank)

Wastewater (sewage) is fed by gravity drain into the inlet of the CYCLONE and enters the Primary Settlement Tank. Here the wastewater is separated into:

Settled Solids (bottom of the tank).
Floating Solids (top of the tank).
Liquid.

This screens out the solids and only allows liquids to flow forward for treatment.

CYCLONE uses either a single or two stage Primary Tank depending on the model.

Aeration (Biozone)

The liquid wastewater is then flows into the Biozone.

The Biozone is the heart of the treatment process and is where the liquid effluent is biologically cleaned.

The Biozone is filled with XRX media (details below). The XRX media creates a huge surface area within the Biozone that creates a habitat for aerobic bacteria and microorganisms. As the wastewater flows though the Biozone, microorganisms clean it by feeding on the pollutants.

The bacteria must have an oxygen supply, and this is provided by an external air blower.

Air is supplied to diffusers at the base of the CYCLONE sewage treatment plant from an external blower, housed in a weatherproof enclosure. The air has two functions:

To circulate the XRX media.
Provide oxygen.

Final Settlement Tank (FST)

The wastewater then flows into the Final Settlement Tank (FST) where any remaining fine solids settle at the base of the tank forming sludge.

The clear effluent is discharged into the environment (drainage field or watercourse).

The settled sludge is returned to the Primary Tank via a non-mechanical air lift system.

This keeps the bacteria in the Biozone supplied with food even when there is little or no wastewater coming from the building(s) and keeps the system
working during low use and holiday periods.

CYCLONE sewage traetment plant cross section showing different chambers — Cross section of CYCLONE sewage treatment plant

XRX Media

The design of the Biozone in CYCLONE sewage treatment plants is the key to its performance and reliability. XRX media is a vital component in the design.

XRX has been specifically developed to provide the optimum surface area to volume ratio needed for wastewater treatment. It provides a huge surface area for bacteria to colonise, whilst providing excellent water flow pathways.

The large surface area greatly increases the number of bacteria in the Biozone. This improves the efficiency of the biological filter and reduces the volume required to a minimum.

The media requirements change during the treatment process. This is because biological treatment of wastewater is a natural process and some pollutants
are broken down before others. Different strains of bacteria breakdown different pollutants in wastewater and different bacteria have different optimal conditions. CYCLONE sewage treatment plants use different XRX media throughout the biozone to maintain optimal conditions for each strain of bacteria. This makes the system more efficient and compact.

XRX media is constantly circulated around the Biozone and is not static. The aeration at the bottom of the Biozone creates an upward current that causes the XRX to move around the Biozone creating perpetual mixing of the wastewater and contact with the XRX media. The physical movement of the XRX also sloughs off sludge and dead bacteria and prevents it from clogging which is a common problem with static media.

XRX media for CYCLONE sewage treatment plants — Close up view of XRX media

CYCLONE for Commercial Use

CYCLONE sewage treatment plants are ideal for commercial applications such as campsites, hotels, restaurants, pubs, schools, offices, etc.

Commercial sites usually produce a very different wastewater to domestic sites:

Flow fluctuations week/weekend.
Higher loads in summer/peak season.
High concentrations of pollutants.

CYCLONE is excellent at handling these conditions.

As a rule, sewage treatment plants need to have at least 50% of their maximum design loading to function. i.e. a 100 person system needs at least 50 users.

CYCLONE has been tested and proven to work down to only 5% of its design load.