Waste Water Treatment Systems
service detail
Satec designs and delivers wastewater and sewage treatment systems for municipal, industrial, and commercial applications. Our experienced engineers select and integrate the most appropriate treatment technologies to provide reliable, efficient, and cost-effective solutions tailored to each project’s specific requirements.
Our expertise includes:
Activated Sludge Treatment
Activated sludge is one of the most widely used biological wastewater treatment processes. Our systems utilise continuously aerated microbial biomass to effectively remove organic pollutants and can be configured for extended aeration, nitrifying, non-nitrifying, or contact stabilisation processes to suit individual treatment requirements.
Biological Filters
Biological filtration systems use specialised filter media over which wastewater is evenly distributed via rotating distributors. As the wastewater passes through the media, naturally occurring microorganisms break down contaminants before the treated water is collected through an under-drain system.
Dissolved Air Flotation (DAF)
Dissolved Air Flotation (DAF) is an effective process for removing suspended solids, oils, and greases from wastewater. Fine air bubbles attach to contaminants, causing them to float to the surface where they can be removed efficiently.
Tertiary Treatment
For applications requiring a higher quality discharge, Satec provides tertiary treatment solutions that further polish wastewater after biological treatment, helping customers meet increasingly stringent environmental and discharge standards.
Sludge Thickening & Dewatering
We offer a range of sludge management solutions, including conventional picket fence thickeners, gravity belt thickeners, endless belt filter presses, and membrane filter presses. These systems reduce sludge volume, lowering transportation and disposal costs while improving operational efficiency.
Thermal Sludge Drying
Thermal drying provides a highly effective method of reducing sludge volume by removing residual moisture. Our systems can achieve a dry solids content of over 90%, significantly reducing disposal costs while producing a more manageable end product.
With extensive experience across the full range of wastewater treatment technologies, Satec delivers integrated, high-performance treatment systems that maximise operational reliability, minimise maintenance requirements, and ensure compliance with environmental regulations.
waste water systems services
Commercial Package Treatment Systems
Satec Service Ltd offer the supply, installation and commissioning of WPL HiPaf commercial package treatment systems, the SAF waste water is suitable for medium sized applications from 60 – 2000 population through the Submerged Aeration Filter process.
Each packaged waste water treatment plant consists of primary settlement tanks, biological treatment tanks and final settlement tanks offering high quality treated effluent which meets the standards of water utility companies. The tanks are compact, odourless, hidden under ground and the flush nature of the manholes leave minimal impact on the surrounding environment.
Each packaged waste water treatment system uses no chemicals during the treatment process enabling them to meet discharge consents which demand stricter limits such as sites of special scientific interests.
A WPL HiPaf Submerged Aeration Filter
The versatility of the packaged waste water treatment system allows it to achieve efficient treatment whilst operating at maximum designed populations but also continues to treat efficiently all the way down to 10% of its designed population equivalent. This flexibility makes these systems ideal for applications such as hotels and caravan sites where there can be large seasonal variances.
The installation, maintenance and servicing of the Commercial packaged waste water system is quick and straight forward providing a long-term cost-saving solution.
Domestic Package Treatment Systems
Domestic Packaged Water Treatment Plants
Satec Service Ltd offer the supply, installation and commissioning of the WPL Diamond domestic waste water treatment systems suitable for smaller applications serving populations through multiple ranges from 1 – 55.
These modern Domestic Package Treatment Systems differ from more traditional septic tanks by offering high quality treated effluent all packed into a single GRP tank. The tanks are compact, odourless, hidden under ground and are all but invisible except for a single manhole cover.
The installation, maintenance and servicing of the Domestic Package Treatment Systems is simple providing a long-term cost-saving solution
WPL Diamond domestic packaged waste water systems are ideal for replacing the many septic tanks installed around the country which will soon become non-compliant. The new regulations came into effect on 1st January 2015 and require all septic tanks which discharge to a ditch, stream, canals, rivers, surface water drains, any other water source, soak away pit, soakaway crates, tunnels, ezy drain etc to be replaced by 1st January 2020.
There are other engineered alternatives to replacing your septic tank which are suitable in certain circumstances, please contact us should you require advice on an engineered solution.
Engineered Sewage treatment plant design and build solutions
Design, supply and installation of packaged and specifically Engineered Sewage treatment plant design and build solutions for domestic and industrial applications such as housing estates, construction camps, offices, factories, schools, hotels, residential centres, food processing factories.
Plants can include pump stations, inlet screens, balancing tanks, activated sludge plants (aeration and settlement tank), aerobic sludge digesters, tertiary plants (pressure filters, slow sand filters, upward flow clarifiers, drum filters), chlorination or UV disinfection.
The installation, maintenance and servicing of the Domestic Package Treatment Systems is simple providing a long-term cost-saving solution
WPL Diamond domestic packaged waste water systems are ideal for replacing the many septic tanks installed around the country which will soon become non-compliant. The new regulations came into effect on 1st January 2015 and require all septic tanks which discharge to a ditch, stream, canals, rivers, surface water drains, any other water source, soak away pit, soakaway crates, tunnels, ezy drain etc to be replaced by 1st January 2020.
There are other engineered alternatives to replacing your septic tank which are suitable in certain circumstances, please contact us should you require advice on an engineered solution.
Pump stations
Sewage systems generally rely on gravity to take sewage from domestic and commercial premises to the main sewer lines, however, it is not always possible to achieve a gravitating path which will deliver the sewage. Interfering factors include: –
- Basements of buildings are lower than the main sewer.
- Geographical topography presents upward gradients.
- Locations where gravity infrastructure has not been installed.
In these circumstances, Commercial pump stations will be required to pump the sewage up to the main sewage lines overcoming the interfering factors.
Operation
The Commercial pump stations itself is made up of a large tank called a wet well which accepts the flow from a building or group of buildings. Flow then collects in this well and the liquid level rises to a pre-determined level, then once this level is reached pumps start. The liquid is then pumped away up to further pump stations, the main sewer line or to a level where it may gravitate to the main sewer line. Once the level of the liquid falls back down below a pre-determined level, the pumps cut out and the process is repeated.
Installation and Maintenance/Service
Satec Service have designed and installed countless pumping stations during their long history for a range of applications and would advise that, to avoid costly repairs and flood events, it is crucial to maintain/service these systems regularly. Satec Service offer a national pump servicing regime which keeps your systems operating year-round. In the unlikely event that a problem does occur our team members will attend on a call out basis to address the problem. Satec have vast amounts of experience installing and maintaining pump stations, some of the features are listed below:-
- Pumps – Flygt, TT, Wilo, Grunfos etc
- Guiderails & pedestals
- Ultrasonic heads, milltronic floats
- Control Panel design
- Valves – NRV’s, gate etc
- Telemetry, teltex
- End to end testing
- Davit arm fabrication and installation
- Over pumping
Pump Station Conversion to Utility Standards
Utilities companies often adopt private pump stations after a period of private management, when this is done the pump station requires converting/upgrading to the Utility Companies standard specification. This conversion usually involves bringing the valves above ground to avoid confined space entry, changing the wet well covers to lockable versions and the supply and testing of davit arms to avoid manual handling. Satec Service have undertaken many such conversions prior to Utility Companies taking them over.
Ejector stations
SATEC (SHONE) AUTOMATIC PNEUMATIC EJECTOR
Ejector Stations provide means whereby sewage or other liquids can be raised from one or more given points and conveyed to any other point. The Ejector employs Compressed Air as its motive power therefore moving and working parts are reduced to a minimum.
The Ejector Stations are extremely versatile and will raise crude sewage, effluent and sludge under the most varied conditions. It is extensively used in municipal sewerage systems, private and government buildings, atomic research establishments, aerodromes, dockyards, power stations.
The Principal of the Satec Ejector is so flexible that it can be supplied in any size or shape for any specific application, if so desired. Benefits include: –
- Simplicity of Construction
- Mechanical and Electrical efficiency
- No internal moving parts
- Ability to give unyielding and long service
- Low maintenance costs
- Minimum attention required.
Description of operation
The Ejector consists of a closed cast iron or fabricated steel vessel with flaps on inlet and delivery connections, it is automatically controlled by a means of a sealed low voltage probe, the operation being as follows;
The liquid to be raised gravitates from a manhole through the inlet pipe forcing the flap valve to open to allow the ejector to fill. As the sewage rises in the ejector vessel it reaches the low voltage probe, when contact is made the probe sends a signal to a electrically operated solenoid valve which allows compressed air to enter the vessel for a pre determined time via timers in the control panel, the air forces the inlet valve to close and opens the delivery valve allowing the sewage / liquid to be discharged up the rising main, when the timer has timed out the solenoid valve de-energises and opens up the vessel to exhaust, the delivery valve then closes under the pressure of the rising main and the sequence is then repeated.
AIR SUPPLY
Compressed air can come from several sources;
Direct Acting;
Compressor starts when the sewage makes contact with the probe and run for a set time via a timer, this system is usually used on installations with low flow and low discharge head.
Dual Compressor with Air receiver;
Duty, duty assist air compressors working off pressure switches, Duty cut in, duty cut out, Assist cut in assist cut out, the air is supplied into a storage air receiver with the compressors alternating after every cycle, this enables the ejector to make several discharges before the compressor needs to start again, to enable full economy of the air a pressure reducing valve is install downstream of the receiver and is set slightly above the pressure required to discharge the contents.
Factory Air;
If the installation is in an office building, factory or other premises which has its own air supply then this can be utilised by using a pressure regulating valve kit set at just above the pressure required to discharge the contents of the ejector.
Industrial effluent plants
Satec Service Limited have many years of experience within the Industrial effluent plants and wastewater treatment industry designing, constructing, installing and commissioning plants within a diverse range of applications.
Treatment routes can include physical-chemical processes that focus primarily on the separation of particles through the addition of coagulants and flocculants, resulting in the formation of stable solids that can be physically separated through either dissolved air flotation or gravity settlement.
Satec Service Limited are also able to offer primary, secondary and tertiary filtration systems comprising multi-media and activated carbon, in addition to further treatment routes involving ion exchange and membrane technologies.
Our key abilities are being able to understand clients requirements and to provide bespoke solutions to meet their needs in order to provide a treatment system that is fit for purpose.
Picket Fence Thickeners
Design, supply and installation of Picket Fence Thickeners for sludge from sewage works or water works. For sewage works the Picket Fence Thickeners are designed to WIMES specifications and for water works to utility sector standards.
The tanks from site painted welded carbon steel, glass coated bolted steel panels or concrete.
Picket fence and floor scraper from galvanised carbon steel or stainless steel.
Peripheral launder channel and diffuser drum from GRP or stainless steel.
Full span bridge or half rotating bridge from galvanised carbon steel or stainless steel.
Central or peripheral gearbox drive adequately rated for the duty with safety margin and incorporating an overload device. Control panel provided or incorporated into client’s system.
Sludge dewatering plants
Design, supply and installation of packaged and specifically engineered plants for Sludge dewatering plants from sewage treatment plants (activated sludge from the settlement tank or from a thickener) or water works plants.
Sewage Sludge dewatering plants may be activated sludge from settlement tank or from a thickening tank or aerobic digester. Water works sludge will be from the settling tanks. Plants may be belt thickeners, rotary drum filters, centrifuges, filters presses or disc filters all complete with polymer dosing.
Plants can be mounted indoors, inside GRP housings or containerised. Fully automated except for polymer recharge.
Tertiary Treatment
Tertiary treatment may be considered as the further treatment of sewage that has already been treated to a standard achievable by biological treatment. The most common application of tertiary treatment is the reduction of suspended solids (and associated biochemical oxygen demand) but it may also be used to reduce ammoniacal nitrogen, total nitrogen, phosphorous or micro-organisms.
UpwardFlow(PebbleBed)Clarifier
A simple process that should not be confused with conventional clarification tanks used in primary and secondary treatment. Secondary effluent from a biological oxidation plant passes in an upward direction through a shallow bed of pea gravel supported on a steel/plastic mesh. The suspended solids in the effluent are removed by natural flocculation and settlement Upward flow clarifiers will accommodate wide fluctuations in suspended solids concentration and hydraulic loading and there are no mechanical moving parts.
PressureFilters
A closed vessel in which the influent is forced (in a downward direction) by pressure generated by feed pumps through a static filtration bed. The filter is fully automatic in operation with flows controlled by air operated butterfly valves mounted on a frontal pipe manifold. As the solids level in the filter medium increases air scour and backwashing is necessary (backwash liquor is returned to the head of the works for further treatment), thus flow balancing or sufficient duplex filtration capacity is required to ensure continuous operation.
RotatingDrum/DiscFilters
Drum/Disc filters are packaged units that can be used to replace conventional humus tanks or as tertiary filters. They are able to accommodate a wide range of suspended solids loadings and are designed to receive a gravity flow thus negating the need for high pressure feed pumps.
Ultraviolet Treatment Reactors
Ultraviolet Reactors are used to disinfect the final effluent from sewage plants where a higher quality of discharge is required. The Ultraviolet Reactors provide an environmentally friendly, chemical free treatment for chlorine resistant microorganisms such as Cryptosporidium and Giardia. Effluent enters the reactor and passes by the ultraviolet lighting tubes where the ultraviolet radiation eliminates the pathogens. The Ultraviolet reactors can be configured to accommodate a wide range of flow rates.
