KEE uses ‘Fixed Film’ technology to meet Northern Ireland Waters’ discharge standards at Derrylin.

“I have experience in other process technologies which can easily facilitate these standards but at an ever increasing cost. I essentially needed something which had been tried, tested and trusted and I was more than satisfied to engage KEE Process to meet these demands”  
Michael McAlary, Northern Ireland Water.

Background

In 2006, Northern Ireland Water (NIW) commenced a project to invest in a new Wastewater Treatment Plant at Derrylin.

Their NIW Project Managers and Process Engineers were tasked with finding a suitable process to achieve the discharge standard set down by the NIEA. Having previously worked with KEE Process as their ‘Framework’ partner for Western & Southern Division RBC Framework, the Project Team selected KEE to assist.

The Challenge

KEE Process was commissioned to design a wastewater treatment system to meet the following criteria:

  • To consistently achieve the consented final effluent standard with a consent of less than 5mg/l BOD and Suspended Solids on a 95 percentile basis.
  • To incorporate the process capability to treat future forecasted waste flows and loads predicted for 2010.
  • To ensure that the treatment capacity could be expanded further (by almost 50%) to manage the forecasted 2035 increase in flows and loads, whilst still maintaining performance objectives.

The Solution

Fixed Film technology offered the best solution in the form of five Rotating Biological Contactors (RBCs) to meet their design criteria. The RBCs not only delivered the consistent performance they were looking for but also offered the lowest lifetime costs and carbon footprint when compared to all other wastewater treatment options available.

Together with the NIW Project Manager, Technical Advisers and Consultants, KEE Process designed a plant which featured ‘modular phased construction’ to minimise on-site workload and concrete tank construction. The new plant was built and commissioned during 2009 and has since then consistently achieved consent standards and delivered considerable savings in capital costs, operational labour costs and energy.

Final Effluent Consent vs New System Performance


Final effluent                                    Target                                                     Actual


BOD                                                     <5.00mg/l                                               2.00mg/l
SS                                                         <10.00mg/l                                             5.00mg/l
NH4-N                                                  <3.00mg/l                                                0.01mg/l


95% ile compliance basis.


Plant Equipment

  • Two 6m diameter, prefabricated hopper-bottomed GRP Primary Settlement Tanks were installed, with fully automated sludge and scum draw-off facility.
  • Five prefabricated RBCs, housed in GRP tanks with hinged sectional insulated covers.
  • Three 6m diameter prefabricated, hopper-bottomed GRP final settlement tanks, with fully automated sludge and scum draw off facility.
  • Final discharge was fed into slow gravity sand filters for polishing up the effluent to reduce suspended solids.

Design Features

  • A ‘flow splitting’ mechanism was installed to give Process Engineers the ability to channel the wastewater flow through the treatment process in different ways to achieve (a) optimal plant performance and (b) provide the flexibility to construct or expand the plant in phases as and when required.
  • Each RBC consisted of four treatment stages, designed to remove all soluble BOD and Ammoniacal Nitrogen to provide the final effluent BOD on a 95 percentile basis.
  • An internal ‘recycle system’ was incorporated to optimise the biological stage, the settling character of the fine solids and control of nitrogen from the plant.

Simple Maintenance and Low Lifetime Cost

  • A 30 year RBC design warranty and 20 year warranty on all structural components minimised the lifetime costs of the new plant.
  • The self-regulating biological stage of the RBCs required very little operational input and maintenance.
  • Simple RBC mechanical maintenance schedule consisting of a 6 monthly lubrication change for bearings and biennial lubrication.
  • Energy consumption of the RBCs was reduced and installed with a rating of only 1.5kW per RBC, resulting in a demand power consumption of 0.8kW on a continuous basis.
  • The RBC Drives were manufactured for a 50 year average lifespan, reducing lifetime costs even further.

Lifetime Cost Savings

NIW reviewed other wastewater treatment works and completed a case study and cost analysis based on a 7.000PE plant. Compared to other process technologies designed for a 30 year life-time, the RBC system provided:

  • £317,185  cost saving in power.
  • £272,420 cost saving in maintenance, operational labour, sludge disposal, and replacement parts.
  • Total OPEX life-time saving of £589,605 over 20 years.

“In today’s economic climate Northern Ireland Water are looking at ways of reducing life-time plant costs whilst meeting ever tighter environment consent standards as agreed and published by the local Environment Agency (NIEA). I needed a simple, easy to maintain process in order to meet these requirements.

The RBC offers a very robust process, achieving good consistent discharge standards, requiring minimum operational and maintenance input and very importantly, low power consumption. This has given me the confidence to accept the RBC process for Derrylin where consistent and tight effluent quality was stipulated by the NIEA”.
Michael McAlary, Wastewater Services Manager, Northern Ireland Water.

For more information about the Wastewater Treatment Process Technology and the Sewage Plant Maintenance Services the KEE Group offer, please call our team on
01296 634500 or visit our
KEE Group website.

KEE Expert – Tankering and De-sludging Process Explained

To keep your wastewater treatment system in good order and operating efficiently, it is important to remove the accumulated ‘sludge’ from the plant on a periodical basis.

So how regularly does your plant require de-sludging?

There are two factors that require consideration before answering this question.

  • The size of your plant and the number of people it serves
  • How thoroughly the ‘de-sludging’ process is undertaken

Generally speaking a plant servicing a single house will require de-sludging once a year.
For larger units, the de-sludging schedule will depend on the inlet flow rate and the type of wastewater being treated. Your local KEE Engineer or our Customer Service Team will be able to advise you in this instance.

If your plant is not de-sludged properly when required, the silt and sediment in the bottom of the Primary Settlement Tank (PST), Final Settlement Tank (FST) and the floating crust on the top of these tanks will build up over time and cause performance issues and possible odours. Additionally incorrect de-sludging can damage the internal Baffles and Drive components resulting in expensive and unnecessary repairs.

De-sludging Process

  1. Break up the surface crust floating in Primary Settlement Tank (figure 1 and 2)  and remove the floating crust solids with the suction hose.
  2. Skim off and remove the crust floating in the FST (figure 3).
  3. Put the hose back into the Primary Settlement Tank and push it right down to the bottom of the tank. Frequently move the hose along the length of the tank to ensure all the settlement sludge is removed.

We recommend your plant is de-sludged approximately 7-10 days before your KEE Engineer is scheduled to complete a routine Maintenance Service. 

For more information or to arrange a tankering visit, please call our KEE Services team on 01296 634500 or visit our KEE Services website.

KEE design and manufacture extended NuDisc® 2000 RBC Installation for Spanish Village.

“Fullgas are delighted that the installation of KEE’s NuDisc® RBC was completed on Monday without a single glitch. All the components fitted into place perfectly and we thank KEE for their expertise, attention to detail and commitment to the successful completion of this project.” Pablo Cepeda, Fullgas.

Background

Fullgas offer environmental services in Spain and have been working with KEE for 25 years.

In September, Fullgas commissioned KEE to design and manufacture an extended NuDisc® 2000 Rotating Biological Contactor (RBC) for a wastewater treatment plant being built to service the small village of Beizama in Guipuzcoa, Basque Country.

The Challenge

The plant was to be designed to treat the waste flow from 230 people and cleanse the wastewater to the required consent for safe discharge into a reservoir.

Attention to detail and dimensional accuracy was critical in order to design and manufacture component parts which would fit perfectly into a solid, inflexible concrete structure erected independently on site.

KEE NuDisc® 2000 Rotating Biological Contactor (RBC) built to service the small village of Beizama in Guipuzcoa, Basque Country.

The Solution

KEE supplied Fullgas with a 3D dimensional design for the concrete tank housing and detailed plant drawings to ensure the wastewater treatment system would meet environmental consent and process specifications. The process design was undertaken by the Basque Authorities.

The KEE 2000 NuDisc® RBC incorporated:

  • A special extended Rotor to accommodate additional ‘media’ required to meet Environmental wastewater consent requirements
  • KEE’s patented technology in Managed Flow and Substrate Balancing, enabling the NuDisc® to maintain process performance at peak times throughout the day.

 

The RBC was manufactured and transported to Spain by KEE, to be installed on time and on budget by Fullgas on the 14th November.

          

NuDisc® 2000 Rotating Biological Contactor (RBC).

For more information on KEE’s latest NuDisc® RBC, please visit our website or call KEE Process on: 01296 634500

WHY CHOOSE KEE?


KEE was formed as a family run business back in 1955. Although the industry has changed significantly since then, KEE’s ‘family’ company culture continues to focus on ethical business values and an integrity and commitment to delivering high quality products and services to its customers.

KEE’s specialist knowledge and expertise is derived from over 60 years’ experience in the development, design, manufacture, installation, servicing, maintenance, refurbishment and operation of wastewater treatment systems and equipment.

Many of our customers today have been working with KEE for over 30 years which is a testament to the trust, loyalty and value our customers have in us as a supplier.

Operation, Service & Maintenance of Wastewater Equipment

  • KEE Engineers have decades of experience in maintaining of all types of sewage treatment equipment and pumping stations, providing peace of mind that your equipment is in safe hands.
  • KEE operate to the highest standards of practice. We are BSI ISO 9001 Quality Management accredited in the commissioning, servicing, maintaining and operating of domestic and industrial wastewater treatment systems. Our Service Technicians are DBS checked and British Water accredited.
  • KEE believes in creating the very best products to protect the environment. Our KEE designers undertake on-going research and development to continue delivering process and cost efficiencies using the very latest advancements in design technology. For example, this year we launched a new Tertiary Filter and UV light disinfection system for the KEE NuDisc-R® which offers superior wastewater quality discharge.
  • KEE Engineers only fit genuine KEE approved parts, selected for their quality, durability and value for money.
  • KEE’s annual ‘Maintenance Service’ includes a comprehensive 127 point checklist report, providing a full analysis of the electrical, mechanical and operational condition and performance of your plant.
  • KEE’s Service Managers and Engineers offer professional advice on looking after your plant, controlling maintenance costs and avoiding expensive damage to your equipment.
  • KEE design and undertake bespoke and standard plant refurbishments and upgrades, meeting the changing needs of our customers and the environment.

An ‘End-to-End’ Service Solution

KEE Services offer a range of maintenance, operation and breakdown services for all types of treatment plant and pumping equipment, from all manufacturers.

  • Annual Plant Electrical & Mechanical Service and Maintenance Assessment
  • Sewage and Wastewater Plant Management and Operation
  • Planned Preventative Maintenance
  • Nationwide 24hr Emergency Call-Out
  • Plant and Equipment Breakdown Repair
  • UKAS Accredited Laboratory Effluent & Water Sampling
  • Tankering and Jetting Advice, Scheduling and Operational ‘Supervision’ Service
  • New Plant Supply, Installation and Commissioning
  • Forecourt Services
  • KEE Approved Spares and Replacement Parts
  • Commercial and Domestic Sewage Systems
  • Grease Management via Dosing/Physical Removal
  • Domestic and Industrial Plant Hire and Rental

KEE know that professional maintenance will extend the life of your plant and minimise the risk of serious damage and breach of environmental consents.

Our nationwide team of directly employed regionally based KEE engineers are trusted by over 6,000 customers.

So . . .  whether you have a single, or multi-site operation across the UK, KEE can design and deliver a tailored service solution to meet your requirements and liaise with the Environment Agency on your behalf if required.

For more information, please call Julie or Natasha on
01296 634500 or email us at sales@keeservices.com

           

 

KEE Parts and Service, Maintenance and Operation

KEE Services Limited Online Shop for WwT Plant spares

KEE Services Ltd – offers maintenance, breakdown services and plant operation for all types of treatment plant and pumping equipment, from all manufacturers. KEE technicians are trained in long-term servicing and look after 8,000 installations in the UK. KEE also operate ‘out-of-hours’ 24 hour call centre.

KEE Wastewater Treatment Systems can be configured for BOD removal and/or nitrification and/or de-nitrification and can include a built-in or modular physical-biological tertiary filter. UV disinfection can also be included into the packaged plant to enable non-portable water re-use.

KEE Process Logo  KEE Services Logo

KEE PROCESS LIMITED and KEE SERVICES LIMITED

KEE is a globally recognised brand operating within in the industrial, commercial and domestic wastewater treatment industries. KEE’s specialist knowledge and expertise is derived from over 60 years’ experience in the design, development, manufacture, install, commissioning, operation, refurbishment, repair and maintenance of wastewater treatment systems and equipment, including:

  • Fixed Film Reactors: Rotating Biological Contactors (RBCs), Packaged RBC Systems, Moving Bed Biological Reactors (MBBR) and Submerged Aerated Filters (SAF).
  • Suspended Growth Reactors: Extended Aeration, Sequencing Batch Reactor (SBR), Oxidation Ditch, IFAS process technologies and Anaerobic Biological Reactor (ABR) for high strength industrial waste.
  • ‘Turn Key’ Solutions: Technical Design, Project Appraisal & Management, Process Engineering, Plant Installation & Operation, Equipment Refurbishment & Upgrades and Plant Rental. KEE also provide approved spares and ancillary products such as Final Clarifiers and Settlement Tanks.

KEE Services Ltd specialise in maintenance & repair services for all makes and types of wastewater treatment systems & pumping stations. Our nationwide team of directly employed, regional engineers and technicians are KEE trained, DBS checked and British Water Certified.

KEE Bio-Guard, the biological solution against Fat, Oil and Grease (FOG).

The Biological Solution against Fat, Oil and Grease.

To maintaining a clear water flow from Fat, Oil and Grease KEE Bio-Guard ensures:

  • Prevention of unpleasant odours
  • Elimination of expensive call-outs
  • Free running drains
  • Conformity with effluent discharge regulations
  • An environmentally friendly response to pollution
  • Peace of mind.

KEE Bio-Guard is a long-lasting solution which needs little further maintenance. Completely biodegradable, and is safe to use in the kitchen environment

KEE Bio-Guard is the biological alternative to prevent blocked drains, offensive smells and maintenance of grease traps.

 

KEE Wastewater Treatment Systems can be configured for BOD removal and/or nitrification and/or de-nitrification and can include a built-in or modular physical-biological tertiary filter. UV disinfection can also be included into the packaged plant to enable non-portable water re-use.

KEE Process Logo  KEE Services Logo

KEE PROCESS LIMITED and KEE SERVICES LIMITED

KEE is a globally recognised brand operating within in the industrial, commercial and domestic wastewater treatment industries. KEE’s specialist knowledge and expertise is derived from over 60 years’ experience in the design, development, manufacture, install, commissioning, operation, refurbishment, repair and maintenance of wastewater treatment systems and equipment, including:

  • Fixed Film Reactors: Rotating Biological Contactors (RBCs), Packaged RBC Systems, Moving Bed Biological Reactors (MBBR) and Submerged Aerated Filters (SAF).
  • Suspended Growth Reactors: Extended Aeration, Sequencing Batch Reactor (SBR), Oxidation Ditch, IFAS process technologies and Anaerobic Biological Reactor (ABR) for high strength industrial waste.
  • ‘Turn Key’ Solutions: Technical Design, Project Appraisal & Management, Process Engineering, Plant Installation & Operation, Equipment Refurbishment & Upgrades and Plant Rental. KEE also provide approved spares and ancillary products such as Final Clarifiers and Settlement Tanks.

KEE Services Ltd specialise in maintenance & repair services for all makes and types of wastewater treatment systems & pumping stations. Our nationwide team of directly employed, regional engineers and technicians are KEE trained, DBS checked and British Water Certified.

KEE Primary and Final Settlement Tanks

Primary and Final Settlement Tanks

GRP Hopper Bottom Settlement Tanks – KEE produce a wide range of Structural or Semi-structural Hopper Bottom GRP Settlement Tanks for small wastewater treatment plants.

KEE Wastewater Treatment Systems can be configured for BOD removal and/or nitrification and/or de-nitrification and can include a built-in or modular physical-biological tertiary filter. UV disinfection can also be included into the packaged plant to enable non-portable water re-use.

KEE Process Logo  KEE Services Logo

KEE PROCESS LIMITED and KEE SERVICES LIMITED

KEE is a globally recognised brand operating within in the industrial, commercial and domestic wastewater treatment industries. KEE’s specialist knowledge and expertise is derived from over 60 years’ experience in the design, development, manufacture, install, commissioning, operation, refurbishment, repair and maintenance of wastewater treatment systems and equipment, including:

  • Fixed Film Reactors: Rotating Biological Contactors (RBCs), Packaged RBC Systems, Moving Bed Biological Reactors (MBBR) and Submerged Aerated Filters (SAF).
  • Suspended Growth Reactors: Extended Aeration, Sequencing Batch Reactor (SBR), Oxidation Ditch, IFAS process technologies and Anaerobic Biological Reactor (ABR) for high strength industrial waste.
  • ‘Turn Key’ Solutions: Technical Design, Project Appraisal & Management, Process Engineering, Plant Installation & Operation, Equipment Refurbishment & Upgrades and Plant Rental. KEE also provide approved spares and ancillary products such as Final Clarifiers and Settlement Tanks.

KEE Services Ltd specialise in maintenance & repair services for all makes and types of wastewater treatment systems & pumping stations. Our nationwide team of directly employed, regional engineers and technicians are KEE trained, DBS checked and British Water Certified.

KEE Dispersed Air Flotation Systems (DAF)

Dispersed Air Flotation Systems

KEE Microfloat® Dispersed Air Floatation Technology – for pre-treatment of industrial and food processing wastewater to reduce FOG, BOD, COD & SS. The KEE Microfloat® system produces extremely fine bubbles (10µm to 50µm air bubbles without the use of a high-pressure pump, pressure vessel and venturi) into the water to float the light fractions.

KEE Wastewater Treatment Systems can be configured for BOD removal and/or nitrification and/or de-nitrification and can include a built-in or modular physical-biological tertiary filter. UV disinfection can also be included into the packaged plant to enable non-portable water re-use.

KEE Process Logo  KEE Services Logo

KEE PROCESS LIMITED and KEE SERVICES LIMITED

KEE is a globally recognised brand operating within in the industrial, commercial and domestic wastewater treatment industries. KEE’s specialist knowledge and expertise is derived from over 60 years’ experience in the design, development, manufacture, install, commissioning, operation, refurbishment, repair and maintenance of wastewater treatment systems and equipment, including:

  • Fixed Film Reactors: Rotating Biological Contactors (RBCs), Packaged RBC Systems, Moving Bed Biological Reactors (MBBR) and Submerged Aerated Filters (SAF).
  • Suspended Growth Reactors: Extended Aeration, Sequencing Batch Reactor (SBR), Oxidation Ditch, IFAS process technologies and Anaerobic Biological Reactor (ABR) for high strength industrial waste.
  • ‘Turn Key’ Solutions: Technical Design, Project Appraisal & Management, Process Engineering, Plant Installation & Operation, Equipment Refurbishment & Upgrades and Plant Rental. KEE also provide approved spares and ancillary products such as Final Clarifiers and Settlement Tanks.

KEE Services Ltd specialise in maintenance & repair services for all makes and types of wastewater treatment systems & pumping stations. Our nationwide team of directly employed, regional engineers and technicians are KEE trained, DBS checked and British Water Certified.

KEE Surface Mounted Fine Bubble Aeration Systems

Surface Mounted Fine-Bubble-Aeration Systems

KEE Triton Aerator/Mixer – The KEE Triton is an energy efficient, dual mode mixer/aerator processor that is capable of nitrification and de-nitrification in one unit. With two propellers and a regenerative blower, the Triton is able to operate either as an anoxic mixer or an aerator/mixer for basins up to 10m deep. The Triton can introduce vital mixing, supplemental aeration or aeration system upgrade to revitalise existing activated sludge treatment plants configured as extended aeration system in circular or rectangular tanks or oxidation ditch configuration to improve plant performance or increase capacity or save energy.  Aeration system upgrade does not require plant decommissioning.

KEE Wastewater Treatment Systems can be configured for BOD removal and/or nitrification and/or de-nitrification and can include a built-in or modular physical-biological tertiary filter. UV disinfection can also be included into the packaged plant to enable non-portable water re-use.

KEE Process Logo  KEE Services Logo

KEE PROCESS LIMITED and KEE SERVICES LIMITED

KEE is a globally recognised brand operating within in the industrial, commercial and domestic wastewater treatment industries. KEE’s specialist knowledge and expertise is derived from over 60 years’ experience in the design, development, manufacture, install, commissioning, operation, refurbishment, repair and maintenance of wastewater treatment systems and equipment, including:

  • Fixed Film Reactors: Rotating Biological Contactors (RBCs), Packaged RBC Systems, Moving Bed Biological Reactors (MBBR) and Submerged Aerated Filters (SAF).
  • Suspended Growth Reactors: Extended Aeration, Sequencing Batch Reactor (SBR), Oxidation Ditch, IFAS process technologies and Anaerobic Biological Reactor (ABR) for high strength industrial waste.
  • ‘Turn Key’ Solutions: Technical Design, Project Appraisal & Management, Process Engineering, Plant Installation & Operation, Equipment Refurbishment & Upgrades and Plant Rental. KEE also provide approved spares and ancillary products such as Final Clarifiers and Settlement Tanks.

KEE Services Ltd specialise in maintenance & repair services for all makes and types of wastewater treatment systems & pumping stations. Our nationwide team of directly employed, regional engineers and technicians are KEE trained, DBS checked and British Water Certified.

KEE Activated Sludge Systems

Activated Sludge Systems

Extended Aeration (EA) and Sequencing Batch Reactor (SBR) – KEE Process EA and SBR systems can be packaged or customised to suit domestic and industrial wastewater. The customised plants are modular construction enabling phased construction and extensions as flows and loads increase. Plants can be readily adapted for nutrients removal (nitrogen or phosphorus).

KEE Wastewater Treatment Systems can be configured for BOD removal and/or nitrification and/or de-nitrification and can include a built-in or modular physical-biological tertiary filter. UV disinfection can also be included into the packaged plant to enable non-portable water re-use.

KEE Process Logo  KEE Services Logo

KEE PROCESS LIMITED and KEE SERVICES LIMITED

KEE is a globally recognised brand operating within in the industrial, commercial and domestic wastewater treatment industries. KEE’s specialist knowledge and expertise is derived from over 60 years’ experience in the design, development, manufacture, install, commissioning, operation, refurbishment, repair and maintenance of wastewater treatment systems and equipment, including:

  • Fixed Film Reactors: Rotating Biological Contactors (RBCs), Packaged RBC Systems, Moving Bed Biological Reactors (MBBR) and Submerged Aerated Filters (SAF).
  • Suspended Growth Reactors: Extended Aeration, Sequencing Batch Reactor (SBR), Oxidation Ditch, IFAS process technologies and Anaerobic Biological Reactor (ABR) for high strength industrial waste.
  • ‘Turn Key’ Solutions: Technical Design, Project Appraisal & Management, Process Engineering, Plant Installation & Operation, Equipment Refurbishment & Upgrades and Plant Rental. KEE also provide approved spares and ancillary products such as Final Clarifiers and Settlement Tanks.

KEE Services Ltd specialise in maintenance & repair services for all makes and types of wastewater treatment systems & pumping stations. Our nationwide team of directly employed, regional engineers and technicians are KEE trained, DBS checked and British Water Certified.