BMS Blivet - Advanced Sewage Treatment System

• The BMS Blivet incorporates many innovative technological elements:
• Aerobic Treatment – BMS Aerotor
• Primary & Final Settlement – Lamellae Plate Settlement Technology
• Plug flow
• Sludge Storage – Minimum 3 months
• Net Hydraulic Lift – Outlet 150mm higher than inlet: allows at least 100 m gravity flow & adjustable internal recirculation.
• Robust Reliable Sewage Treatment
• Above or below ground with no concrete surround – All purpose GRP Steel Reinforced Tank
• Extremely compact/Containerized; All units can fit in a standard container
• Portable; can easily moved from site to site via truck or container
• Delivered ‘ready to go’ – Plug & Play Technology
• Exceptionally easy O&M; equivalent to 1/2-1 unskilled man hour per week
• Very low power; only 2 electrical parts & 8-15 kw/h/day.
• Suitable for Permanent / Temporary / Emergency Use
• Modularity – Units can be expanded in parallel
• Security – Lock down covers provide protection & safety
• Flexibility – Units can be operated in parallel/series to achieve multiple effluent parameters
• All the items above are integrated into one unique ‘plug & play unit’; The BMS Blivet.

If you have a project that requires sewage treatment from 20-5000 PE BMS offer a free no-obligation design service.

We have 30+ years experience in sewage treatment design in 50+ countries worldwide and all climate extremes including for residential, construction sites/camps, hotels, oil/gas/mining camps, offices and schools projects or where temporary treatment is required.

Our Package Sewage Treatment System Sizing & Selection Guide is an excellent free design resource that will allow you to size and select the appropriate sewage treatment plant for differing inlet loads and outlet effluent standards.  It also goes through sewage treatment terminology, calculations, troubleshooting and much more.

Our Education Blog also goes through sewage treatment terminology such as BOD, Population Equivalent, SS, Ammonia, Phosphorus in an easy to understand manner.

The Blivet is manufactured by BMS in our Irish World Class Manufacturing (WCM) facility under an NSAI validated ISO 9001:2015 Quality Management System. The Blivet is manufactured in rot/corrosion proof GRP/FRP (Glass Reinforced Polyester) using only Lloyds rated resins that have an expected life span of 50+ years.  The tank is reinforced with EN8 steel.  All other parts including bearings, motor, gearbox and sludge return pump are by manufacturers of international renown e.g. SKF, Weg, Nord and Jung Pumpen, with excellent local availability.  For ease of maintenance the standard Blivet has only two electrical parts; a max 0.75 kW motor, which runs 24 hours a day and sludge return pump that runs 4 minutes per hour.  This means that maintenance takes less than 1 man hour per week.  The Blivet is fully compliant with EN12255 for Package Sewage Treatment Systems from 50-500 PE.

Due to the quality of manufacture the Blivet also has an extremely low spare parts requirement.

The BMS Blivet is a unique system based on the BMS next generation Aerotor Rotating Biological Contactor (RBC) or Biodisc, which offers a unique combination of fixed film reaction and active aeration.  It offers all the advantages of traditional RBCs; easy operation & low maintenance/spare parts with none of the disadvantages such as one-sided growth, uncertain levels of contact and bridging growth.  It also does not require a minimum MLSS/load/seeding to function.  Combined with lamellae plate settlement, BMS have produced the most compact all in one system available.

1. Lamella Plate Settlers

A unique feature of the BMS Blivet is the utilisation of lamella plate settlers in both the Primary Settlement and Final Settlement Areas. The lamellas, at 60° slope and 50 mm (Primary) and 25 mm (Final) spacing, allow the average upward flow velocity of 0.9 m/hr to be achieved in approximately 25% of the volume required for conventional settlement tanks. This is the main contributor to the overall compactness of the system.

2. The BMS Aerotor

Unlike older activated sludge and RBC systems the BMS Aerotor is a hybrid of active aeration and fixed film reaction with an intense spiral GRP media mounted on a horizontal shaft. The rotational media is enclosed in an outer drum to provide active aeration, intense surface area and net hydraulic lift. Indeed, 97% of the surface area of the Aerotor is inside the Aerotor drum.  Effluent has to completely pass through an Aerotor before moving on to the next treatment stage, therefore 100% contact with the biological surface is guaranteed i.e. ‘Plug Flow’.  Air is also actively pumped through the Aerotor on the upward cycle.  This is markedly different from traditional RBC’s, which only provide treatment based on passive sewage contact with their external surfaces. Therefore, a single Aerotor provides an equivalent surface area to that of 3 x traditional RBC’s.  The BMS Aerotor is self-cleansing and does not suffer from overgrowth due to a faster speed of rotation.  It offers superior flow resistant performance with all of the benefits of traditional RBC’s such as low power, spare parts and maintenance requirements with none of the down sides such as poor flow resistance and excess growth issues.  Aerotor biomass growth is proportional to the incoming load and it does not require a minimum MLSS to function as is the case with active aeration type systems.  Finally, the Aerotor lifts the effluent from inlet to outlet by 150 mm, which enables gravity flow in/out without extra pumping and adjustable recirculation within the Blivet under gravity.

Overall, this leads to superior performance along with a compelling Wholelife Cost

3. Sludge Storage

Sludge storage is provided in the base of the unit. Depending on the load applied there is a minimum of 12 weeks’ capacity provided.  Normally desludging is carried out by suction tanker.

The BMS Blivet is the most flexible Package Sewage Treatment System available.  It can be installed easily and quickly with minimal civils works.  Furthermore, the Blivet is a modular system meaning that a treatment plant can easily be expanded as a population increases by adding further Blivet units.

1. Permanent

Package Sewage Treatment is generally used to provide sewage treatment at locations that do not have access to mains sewage such rural hotels, holiday parks, restaurants, historical sites, schools etc., and to treat the sewage generated by smaller towns and villages.

2. Temporary

As alluded to, the Blivet is fully portable system so has been used extensively for temporary sewage treatment for works camps e.g. oil, gas and military and to allow development where municipal infrastructure is overloaded e.g. housing estates and to supplement overloaded existing systems.

3. Construction Sites/Water Reuse

The Blivet has been extensively used to treat the sewage generated at construction sites that do not have access to mains sewage, where with the addition of UV disinfection the sewage is converted into fully disinfected water suitable for reuse in site e.g. toilet flushing, wheel/road washing, process water.  Not only it is much more environmentally friendly, it offers a compelling pay back versus tankering away untreated sewage.  The Blivet provides years of ongoing value as it can easily be moved from site to site as projects start/finish.  The same process can also be used in any location but especially arid countries to reduce potable water use.

4. Emergency

The Blivet is also ideal for emergency use due to its Portable ‘Plug&Play’ manufacture when an existing plant fails or internationally in disaster relief/refugee camps.

• Villages
• Visitor Centres
• Housing Schemes
• Construction Sites/Projects
• Hotels/Holiday Resorts
• Oil/Gas Mining Camps
• Caravan/Mobile Home Parks
• Disaster Relief Camps
• Offices
• Military Camps
• Schools/Universities
• Existing Plant UpgradesPubs/Restaurants
• Ideal for Island Locations

Permanent/Temporary/Emergency Use Possible in all Locations

• To Percolation/Ground Soakage
• Direct Discharge to Receiving Waters
• To Teritary Treatment e.g BMS M10 Filter
• UV Disinfection (enables reuse)
• Chlorine Tablet Disinfection (enables reuse)

BMS has worked with clients all over the world including KBR, Bechtel, US Military, British Military, UN, MSF, Vinci, Center Parcs, ESB, Sisk, Roadbridge, OPW, Irish Water, Dublin Port, IBM, Facebook, Irish Local Authorities, UCC, Arup, Atkins, AECOM & Coffey Water to name a few.  The Blivet’s simplicity of transport, installation, operation & maintenance and build quality has led to the Blivet being selected time and again for projects in 50 countries worldwide.  Of course, we do not always get everything right but we will always work with a client to solve any problems and are always improving the Blivet due to our policy of continuous improvement based on our experience and customer feedback.

For ease of delivery the Blivet can be delivered fully assembled & ready to go via a standard Megatrailer.  The Blivet can also be transported by a standard container.  When transported by container a small amount of assembly is required on site prior to installation.  This should take less than ½ a day.