Sewage Treatment Plant | PUREFLO | BIODIGESTER

PureFlo Biodigester Sewage Treatment Systems

 Designed for use where the installation of a septic tank is either unacceptable or impractical and a connection to the main sewer impossible, PureFlo biodigester domestic sewage treatment plants offer an extremely efficient and unobtrusive means of sewage disposal.  The PureFlo Biodigester is a three stage sewage treatment plant.  Manufactured entirely from robust and corrosion free materials, the PureFlo biodigesters incorporate unique and patented features to ensure simplicity and efficiency of operation whilst being able to consistently achieve the ever more stringent standards of discharge effluent quality being required by the Environment Agency.  Available in a range of sizes to suit virtually any application from a single residential property, hotels and restaurants or a major industrial / commercial complex, the PureFlo meets the specific requirements of each individual situation.

The PureFlo Biodigester has the EN 12566-3 2005

 Checklist

 Features of the PureFlo Biodigester 6 to 300 person sewage plant range

• Gravity and pumped outlet
• EN 12566-3 certified
• Very clean effluent giving 11mg/litre BOD
• Very Quiet operation
• Alarms are standard
• 25 year tank warranty

The PureFlo system has been tested for 38 weeks in Germany for BS EN 12566-Pt3 and has produced some of the best results in the market place, 20BOD-30SS-20NH4 being the standard to achieve.

The PureFlo actually achieved a 96.2% treatment efficiency ratio which equates to 11BOD-16SS-7NH4, a far better quality of effluent than the vast majority of the competition.

Only manufacturers with this certification are now legally able to sell treatment plants in the UK and Europe, though many manufacturers are continuing to sell illegally.

The PureFlo treatment plants are offered with a 2 year warranty on both tanks and blower, our price also includes for a compressor failure alarm system as standard, which also forms part of the mandatory requirements.

Installation of the PureFlo biodigester requires no specialist equipment and can be carried out by any competent contractor, quickly and simply. Once installed, the PureFlo sewage plant is completely unobtrusive, even the largest plants.

Details of the Larger PureFlo Biodigester Package Sewage Treatment Plants

The “PureFlo” wastewater treatment plant is of a single tank design and incorporates Primary Settlement (PST) Biological Treatment (Biozone), and Final Settlement (FST) within the same structure, allowing delivery to site as a complete unit to provide for a simple and straightforward installation. No other tanks are required except for larger applications ( over 300 p.e. ) where a modular system is provided or where additional treatment may be required to achieve more stringent effluent quality standards or where effluent re-use is proposed. The “PureFlo” sewage treatment plant has been designed to optimize the aesthetic qualities of the final installation by ensuring that there is minimum visual impact. The “PureFlo” process is designed in accordance with the requirements of BS 6297.

Primary Settlement Tank

The primary settlement tank is a two stage tank designed to maximize the removal of gross and suspended solids prior to transfer of the settled effluent to the biozone for treatment. The primary settlement tank also incorporates for a sludge storage volume (based on full load) depending on the desludge periods as identified for individual applications.

Biodigester Biozone

The biological treatment phase of the sewage treatment plant utilizes BAF technology (biological aerated filter) which incorporates two proven principles of biological process in the form of a fixed film reactor for process stability and a suspended floc dispersed growth system for high transfer rates and operational control, to ensure a stable treatment process which is largely unaffected by shock loads. The sewage treatment process incorporates a submerged, high rate, plastic media on which a fixed film of biomass is grown. This film takes nutrition from the incoming settled effluent and is provided with oxygen by means of a small blower unit which aerates the media through HDPE membrane diffusers to provide fine bubble aeration. The action of the fine bubble aeration is carefully controlled to provide optimum oxygen transfer rates and to provide a scouring action to slough off excess biomass to keep the thickness of the fixed biological film at optimum levels, thereby preventing the production of anaerobic bacteria and ensuring maximum sewage treatment process efficiency. The fact that the media remains submerged allows for an element of suspended floc dispersed growth which basically means that there will be biomass which is “unfixed” to the media but achieves sewage treatment through suspended aeration.

The biozone incorporates a two stage process as standard that allows for constant mixing of incoming settled effluent to provide optimum treatment stability and to avoid any “short-circuiting.” The use of a two stage biozone in the sewage treatment plant ensures a high degree of process efficiency to not only reduce B.O.D. levels to that required, but will also achieve reductions in ammoniacal nitrogen in excess of standard requirements.

Biodigester Final Settlement Tank

The final settlement tank is designed in accordance with the requirements of BS 6297 to ensure relevant surface areas and rise rates are achieved to provide maximum settlement of any suspended solids prior to discharge. The “PureFlo” sewage system also incorporates continuous and automatically timed humus sludge return systems to return humus sludge from both the final settlement tank and each biozone, back to the primary settlement tank. Additionally this sewage system also provides for continuous
recycling of treated effluent back to the P.S.T. to not only provide dilution of incoming settled effluent but to also ensure continuous flow during periods of low or no flow, thereby keeping the biomass in prime condition.

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