Flooding and saturated ground cause significant problems for sewage treatment plants and as the UK receives more frequent severe rainfall events, the issue of pollution from sewage treatment plants and septic tanks is an ever increasing threat.
What is the effect of a sewage treatment plant flooding?
The effect of a sewage treatment plant flooding is not limited to contamination. Nearly all sewage treatment plants have some form of motor or compressor which is responsible for driving the treatment process. If these flood, then they will need to be replaced once the flood waters recede.
The most common Septic tank problem that arises due to flooding is that saturated ground cannot absorb any additional water and hence many sites with drainage fields suffer during prolonged periods of rain because the sewage system backs up.
To view Do’s and Don’ts to caring for your sewage treatment plant, click HERE.
Alternatively Contact KEE to discuss service contracts available or arrange a service engineer to repair/service your wastewater treatment system or evaluate potential problems before they happen.
“ A maintenance strategy is necessary to ensure the smooth running of business operations. As well as giving a business better control over its asset and maintenance costs, a clear maintenance strategy helps to ensure statutory compliance and adherence to company policies. ” Ian Short. KEE Services Business Development Manager.
An unplanned, reactive maintenance approach may lead to lower maintenance costs up front and less time spent on planning and performing maintenance in the short term, but that’s about where the benefits end. The cost of replacing failed components, equipment and emergency call out work at short notice and/or outside of normal operating hours costs much more when the situation arises. Therefore not proactively planning your maintenance tends to be more costly in the longer term and causes much more disruption to your business fixing the problem once it has occurred.
Why maintain your equipment?
There are a number of key reasons a business should take the time to consider the maintenance needs of their Wastewater Treatment equipment:
Ensuring a pleasant
Health and Safety obligations
Reliability of equipment
Optimising asset use
Proactive maintenance keeps you one step ahead of your equipment needs. In the same way that you would take your car for regular servicing rather than waiting for it to break down and incurring a large repair bill, it’s strongly advisable to maintain your equipment on a systematic basis.
PPM involves setting a maintenance schedule based on either calendar time or asset hours. This should also take into account factors specific to your business usage such as the environment in which it is operated and any legal waste consent requirements applicable.
A maintenance strategy takes the business’s maintenance aims and translates them into actions to support the company’s obligations, requirements and intentions. The strategy should include the following elements:
Setting of an appropriate budget
Carrying out risk assessments of equipment and processes
Establishing detailed regulatory, health and safety needs
Designing a resource and efficiency management strategy
Ensuring adherence to waste permit limits set by Environmental Agency.
Assessing the age of the equipment and whether any plants require refurbishment to extend plant longevity and minimise reactive maintenance.
Ensuring all maintenance work is completed by certified, registered companies appropriately insured and trained to complete the work.
PPM is usually carried out with the support of a certified partner specialising in asset maintenance such as ourselves. Using our experience, we can provide a better insight into the condition of your assets. As a result, you can adopt a proactive maintenance programme designed specifically for your business and equipment thereby reducing the need for reactive maintenance.
Reactive maintenance may sometimes still be required, but a PPM plan will reduce the likelihood of this happening and will assist you in managing the maintenance budget with fewer surprises. Additionally, if a reactive engineer call out is required, KEE can check when the next planned Service Visit is due at your site and, where appropriate, arrange for the engineer to complete the ‘PPM Service’ on the plant at the same time, therefore minimising call out charges and site visits costs.
PPM also gives much greater control over the impact maintenance has on business operations because you can schedule when you wish maintenance to be completed based on when it will cause minimum disruption. For example, you can arrange a maintenance visit for a specific day when employees are available to provide access etc. Seasonal requirements can also be taken into account to ensure your Wastewater Treatment equipment is serviced and in full working order when needed most.
Following a maintenance program and documenting all work carried out also supports your legal compliance and provides evidence thereof (should it be required) in the event of system failure leading to harm or environmental damage.
KEE Services maintain all types and makes of Wastewater Treatment equipment. Please contact us on +44 (0) 1296 634 500 or visit ourKEE Services websitefor more information on designing a PPM programme to suit your requirements.
The wastewater treatment plant at the village of Keith in Aberdeenshire treats municipal wastewater from the village and effluent from a famous branded Whisky Distillery nearby.
The overall process on site includes inlet works with a grit chamber and screen for municipal wastewater. After this preliminary treatment, the municipal wastewater stream is mixed with the Distillery effluent and is processed through the first-stage high-rate biofilter tower. The effluent from the biofilter tower is then processed through radial flow-scraped primary settlement tanks and the settled effluent is discharged into a two-stage activated sludge basin consisting of two tanks of 7.92m x 7.92m x 4.65m deep (water depth 3.65m). The mixed liquor from the activated sludge plant is discharged through to three radial flow-scraped final settlement tanks and the settled effluent is discharged to a watercourse. The settled sludge is returned (RAS) to the activated sludge basin with excess sent to sludge storage. Finally, supernatant from the sludge storage tank is returned to the feed for the high rate filter tower.
The aeration system for the activated sludge basin consists of two surface-mounted aerators driven by a 20kW common-geared motor through a propshaft delivering approximately 30kg/hour of dissolved oxygen.
EXISTING AERATION SYSTEM – ONLY ONE SURFACE AERATOR OPERATING
The total BOD load to the plant from municipal and industrial sources is 570 kg/day and approximately 285kg of this is reduced through the high rate biofilter and the remaining 285kg/day is required to be treated through the activated sludge plant. The aeration tank capacity is 230m3 each and is normally operated at MLSS concentration of approximately 2000mg/l. One of the surface aerators in the existing aeration system had failed and a temporary venturi aeration system was installed to assist in oxygen supply.
KEE were requested to visit the site, analyse the situation and evaluate the process requirements to make a proposal to upgrade the aeration system. The factors to be taken into account included the need to upgrade the aeration system whilst the plant continued to operate (without decommissioning the plant) and to ensure that the new aeration device produced less than 60dB noise. KEE evaluated the existing process parameters and concluded that the plant could be operated at a higher MLSS concentration of up to 4000 mg/l at a substrate loading rate of 0.15g BOD/g MLSS. The estimated dissolved oxygen demand on this basis would be approximately 33kg/hour.
KEE proposed to install four 5.6kW dual mode Triton processors to provide complete mixing of both the aeration basins and to supply up to 40kg/hour of dissolved oxygen. The Triton dual mode processor is an efficient aeration device which provides total (horizontal and vertical) mixing of the whole basin. It can be mounted from a wall or a bridge or can be supported from floats. The Triton can mix up to a depth of 10m and therefore is also ideal for upgrading existing aeration systems for total replacement or supplemental aeration. The Triton uses a low-power regenerative blower for air supply and a direct-coupled electric motor to generate a plume of fine bubble aeration which is able to penetrate through to the bottom of the tank. This air/water mixer provides a long retention period for air bubbles and the resulting high efficiency oxygen transfer into the mixed liquor. By EPA definition the Triton is a fine bubble aerator.
KEE TRITON® AERATION IN OPERATION
The four Tritons were mounted from the side walls of the existing tanks and, once all the installation work was completed over two days, the electrical cabling was finalised. The blowers supplying air into the Triton were controlled through D.O. probes located in the aeration basin. Once all the electro mechanical work was complete the Tritons were switched on and the old aeration system switched off. The plant aeration system upgrade was achieved in less than one week’s time on site and without any downtime on the existing treatment process. There was no need to hire temporary plants to relieve activated sludge plant. Apart from large savings in capital and operating costs, the biggest benefit was that all the logistics and space problems associated with installing a temporary plant were avoided. The noise emitted by the new aeration system is much lower than specified and definitely lower than the previous system. The process performance of the plant has improved and the plant is able to meet its specified process objectives and has continued to do so for over twelve months.
The maintenance and operation of wastewater treatment equipment is a specialised task and KEE Services Limited recognises this.
With its extensive experience of on-site servicing of all types of wastewater treatment and pumping equipment, its technicians have the knowledge necessary to protect its customers’ investment and the environment.
KEE Services Limited offers planned maintenance programmes ranging from an annual visit to full plant operation. Its aim is to respond to all of your urgent servicing and maintenance needs. The KEE Services Team of fully trained Technicians operates on both a local and regional basis to ensure a prompt and reliable service.
Committed to maintaining your environment
KEE Service Ltd offers Preventative Maintenance, Process Operation and Breakdown Services for all types of treatment plant and pumping equipment, from all manufacturers.
KEE Services Ltd supports its UK customers during out-of-hours emergencies by offering a 24-hour manned call out service.
KEE Technicians are trained in long-term servicing and look after over 8,000 installations in the UK. They have sound mechanical and electrical experience, combined with application knowledge, and can identify problems early.
Working on a local basis, KEE technicians give a prompt service and have a good understanding of the conditions and legislations in each area.
Service and maintenance contracts include routine visits to keep equipment from both KEE Process and other manufacturers in top condition and prolong its lifespan.
There is a range of contracts available or a package can be designed specifically.
If refurbishment or upgrading is necessary, KEE Services can advise on the alternatives.
Site assessment can be made and installations planned for new and existing sites.
KEE seeks to identify and satisfy the needs of their customers by providing quality engineered solutions priced to offer value for money. KEE has over 60 years’ experience in wastewater treatment, process engineering, servicing and operation with over 350,000 installations worldwide.
The technologies and services offered by the KEE Group of companies are listed below:
Anaerobic Reactors – The KEE Group offer design, installation and operation of on-site treatment plants. Their technologies include anaerobic digestion, aerobic processes including RBC and Submerged Aerated fixed film systems, extended aeration and SBR activated sludge processes, complemented with physical and physio-chemical processes. KEE also have a team of experienced process engineers and project engineers capable of delivering solutions to suit
pre-treatment of industrial and food processing wastewater
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 achieves the same result as conventional DAF systems without the need to use a high-pressure pump and venturi. It incorporates a system to produces extremely fine bubbles 10 to 50 micron air bubbles into the water to float the light fractions
Residential or commercial, save time and money by having KEE Services desludge and service your treatment plant.
Most of the times your wastewater treatment system will need no intervention from you to do its work. All it will require is the annual desludging and that’s when KEE Services can help.
We provide a timely, guaranteed and professional service to empty your wastewater system. But that’s not all! We also provide advice and support and can help you to keep everything working sweetly.
Waste water from sinks, baths, showers, dishwashers, washing machines and toilets are plumbed into your foul drainage system. This waste arrives at the wastewater treatment system where the solids settle to the bottom and light materials such as grease, suds etc. float to the top. For every litre that flows into the tank a litre must flow out into the drainage field below the septic tank. There is very little biological treatment within a septic tank, although modern package sewage plants do treat the effluent.
If the tank is not emptied on a regular basis solids will be washed into the drainage field and can cause blockages. These blockages are hard to remove and the most common remedy is to install a new drainage field. This can be very expensive compared to regular emptying.
KEE Tankering Services or Jetting Services
Why KEE Services Tankering?
Reasons why you should choose KEE Services to empty your Wastewater Treatment System.
You get a completely local service from a nationwide company
You speak to real people, and will get free advice and help
You know that the job will be done well by our highly trained and experienced engineers.
The work is guaranteed
The price we quote will be the price you pay there are no supplements, call outs or fuel surcharges.
We have been servicing, repairing and emptying wastewater treatment systems for more than 60 years.