A Domestic Sewage Treatment Plant

Biocell Domestic QuickOne+

Rated 4.70 out of 5 based on 27 customer ratings
(27 customer reviews)

  • Highest effluent quality and lowest energy consumption on the market
  • Reinforced HDPE shallow dig tank
  • No concrete backfill necessary
  • Odour free and whisper quiet operation
  • 30% less sludge production than competitor systems
  • Suitable and approved for installation in place of any existing septic tank
  • EN12566-3 and SR66 certified
  • British Water approved
  • Suitable for 4 up to 48 persons
  • Gravity and pumped outlet models available
  • Running costs as low as €0.10 / £0.08 per day
  • Rapid 2-Day Nationwide Delivery
  • Get in touch for a more information, a free quotation, or free advice from our friendly team


The Biocell Domestic QuickOne+ is one of our most popular small scale sewage treatment systems and for good reason. It produces the best effluent quality on the market but with the lowest energy consumption of any sewage system available. We can prove this with our CE declaration independent test certificate and EN12566-3 test. It is also SR66 certified and British Water approved. In fact, we can assure that every Biocell product meets local and national wastewater rules and regulations.

The tank is a single piece watertight unit, it is not bolted together in sections and there are no moving parts inside so it’s simple but effective. It is made from reinforced HDPE with a flat base for easy installation. This shallow dig tank is suitable for below ground installation in all soil conditions without needing a concrete backfill which saves our customers time and money. Overall, the system is suitable for 4 up to 48 persons with gravity and pumped outlet models available.

Homeowners, why buy a Biocell QuickOne+ septic system?

If you are thinking about saving money, the Biocell QuickOne+ is an ideal choice. You could accumulate significant yearly savings thanks to this low energy home sewage system with lowest running costs of €0.10/£0.08 per day. On top of that, it has industry leading desludging intervals, producing less sludge than our competitors domestic sewage treatment plants.

The simple, effective design operates quietly and without any unpleasant smells. There are no moving parts within the tank and the wastewater treatment process is powered by air and natural bacteria, so no need for any chemical additives. Our end users can enjoy total peace of mind from one of the most reliable, tried and tested septic systems on the market. Plus, we offer nationwide customer support and service teams as well as optional maintenance packages to keep your new home sewage treatment system in top working order.

Installers/Builders, why buy a Biocell QuickOne+ domestic sewage treatment plant?

Similarly, installers and builders can benefit from significant cost savings with a trade discount. We have made the installation process as quick and as simple as possible. The single piece high density HDPE tank is reinforced with stainless steel so no concrete is ever required and is guaranteed to be watertight . A mini digger is perfectly suitable for installing this shallow dig tank. It has a flat base for simple installation (unlike curved or cone-shaped tanks that are difficult to install) and risers for deep installations. The Biocell Domestic QuickOne+ is plug and play. It is a complete packaged plant designed to be ready to go. Quick turnaround times and rapid 2 day nationwide delivery.

Biocell quickone home sewage treatment plant

How does the Biocell QuickOne+ home sewage treatment plant work?

The Biocell QuickOne+ is a totally packaged plug and play home sewage treatment plant. The full treatment process happens within a single tank. The treatment process is quick, simple and trouble free.

Unlike other systems, the tank does not need constant electricity to produce the amazing effluent quality it achieves.

  1. Firstly, raw sewage from the house flows into the sewage treatment plant.
  2. Then, the small air blower activates and runs in an on/off cycle aerating the wastewater via the bubble diffusers. This serves to mix the wastewater and to totally aerate the wastewater.
  3. Following that, naturally occurring bacteria in the wastewater develop in the aerated wastewater. They feed on the organic material and nutrients in the sewage, totally treating and cleaning it of contaminants. The aeration process supplies the bacteria with abundant oxygen, allowing them to multiply and clean to industry leading standards.
  4. Finally, the settlement phase occurs after the aeration and cleaning has happened. During the settlement phase, any remaining fine solids in the wastewater settle to the very bottom of the tank producing sludge. There is no electricity used during the settlement phase. The treated water at the top of the tank is totally cleaned and ready for discharge to the soakaway or stream/watercourse.

Simple, trouble free with no moving parts in the tank.

A process powered totally by air and naturally occurring bacteria.

No chemicals or additives necessary.

Additional information


4-48 person systems available

Electrical Consumption (per day)

Low energy consumption on market
6 persons models: €0.10 / £0.08
8 persons models: €0.12 / £0.10
12 persons models: €0.16 / £0.14
14 persons models: €0.18 / £0.15

Treatment Standard

98% treatment efficiency

Inlet Pipe Size

110mm / 4" PVC

Outlet Pipe Size

Gravity models: 110mm / 4" [OD]
Pumped models: 38mm / 1¼" [OD]

Manhole Extensions Available

Yes – to 1000mm depth

Manhole Size

Ø 680mm – low visual impact

Tank Material

HDPE with reinforcement – unbeatable strength

Electrical Supply

3 core 220v supply to plant


EN12566-3, SR66, DIBT, British Water approved equipment

CE marked

Tank and all components CE approved

Suitable For Below Ground Installation

Yes – without concrete backfill

27 reviews for Biocell Domestic QuickOne+

  1. Rated 5 out of 5

    Adam Freylit

    Needed a system fast. Delivered 1 day after order. Very impressed with tank when it arrived. DIY installer here. Installed now and working perfectly. Would barely know there was a system in the garden.

  2. Rated 5 out of 5

    Stanley – UK

    Got a 6 pop tank for my new house. Price was keen. Very happy with product on arrival. Sales guy knew his stuff. 5+

  3. Rated 5 out of 5

    Ed Moriarty

    Did a bit of research and went for the Quickone domestic. No complaints. Good service.

  4. Rated 4 out of 5

    Barry Quinn

    All good. Installed now. Digger guy said he was very happy to be installing it as the reinforcing makes his job very easy. However, -1 star as was supposed be delivered tuesday afternoon but didnt arrive until wednesday morning. to be fair they did say that they could not guarantee next day delivery due to my location. But I am a harsh critic!

  5. Rated 5 out of 5

    Ian Thompson

    Was worried about noise as my neighbour has a different brand of system installed and it is very noisy. They guys at biocell said it was quiet. I took the chance and I am 100% satisfied. Compared to the neighbours unit the difference is shocking!

  6. Rated 4 out of 5

    Patricia K

    It was my job was to review and choose a sewage system for our new self build for my husband. Happy with the system. No problems during installation or operation. Nothing to compare it to really though so 4 stars.

  7. Rated 5 out of 5

    Billy Morrison

    Have my own digger. Have installed approx 3 tanks over last 10 years. This was the best yet though – which is great as its for my daughters house. Lovely shallow dig tank. Serious strength in the tank. didnt have to be careful with the install. Have been keeping an eye on it for last few weeks and its A1.

  8. Rated 5 out of 5

    Martin Burke

    I used it to replace a leaky concrete tank that has been a nightmare. Went for the biocell as it had a lower electricity use than any other system. Retiring soon so every penny counts.

  9. Rated 5 out of 5

    Alpine Drainage

    We are a drain cleaning company that does the odd install. Sales guys were straight up with answers to all my Q’s. Installed the tank 4ft below the garden level without a problem. Im happy and my client is happy.

  10. Rated 5 out of 5

    Adrian Capel

    Building a passive house. The Biocell quickone has the lowest energy of ANY system I came across. Also has an amazing level of cleaning. I was very surprised at some systems on the market. Their electricity use is just HUGE. The biocell unit ticks all my boxes.

  11. Rated 5 out of 5

    A Kelly

    Live beside a lake. Building control imposed very strict treatment standards. Biocell has the good standard at a good price. Installed by my groundworker and he said it was a great tank. Im no expert but it looked like a serious piece of kit.

  12. Rated 5 out of 5

    Tony P

    Building 5 houses to sell. Got excellent advice from the biocell guys on my soakaway system also. All approved by the local council and installed a 25 pop system. Good value for money. Will use them for my next project. They installed a system for my local school – so thats how I heard about them.

  13. Rated 5 out of 5

    Sam Connolly

    Winter is coming. We have had serious issues with our old system for the last few years. Its becomeing a nightmare emptying it. Was out there on christmas day last year. Got a few quotes last year but we could not afford it. Was speaking to my cousin recently who built a new house and got a tank from biocell. I had given up on it at this point due to my budget, but said I would call them as my cousin insisted. Anyway. I wont write an essay – but they did a full assessment, then gave me a price, then did the work and actually stuck to the price [!!!!] and im looking forward to a winter where I am not out in the garden every week pumping out the tank. Dont write reviews but making an exception here.

  14. Rated 5 out of 5

    Moham Stapp

    Very good tank. I am very pleased with my choice.

    • James Clarke


  15. Rated 5 out of 5

    Tony Quill

    Very pleased when I saw the tank. Images of the quick one look good on website, but it is equally impressive in reality. My installer was also happy to see it as he says he is sick of some of the rubbish people ask him to install. 5+

  16. Rated 5 out of 5

    Robert G

    Ordered Christmas week. Installed over Christmas. Had loads of visitors so it got a very good test and all good!!

  17. Rated 5 out of 5

    Val Robinson

    I build 5 houses a year and I am in business 20 years. Most of my work requires an off mains drainage solution. These tanks are simply the best engineered tanks on the market. When you see this tank arrive you will be pleased you went for one and avoided some of the other rubbish on the market. I have seen it all. Green lid is very handy also – you can hardly see it in the garden. Good job biocell!

  18. Rated 5 out of 5

    Barry Eviston

    Had one of these installed as part of an upgrade. Very minimal visual impact with small green lid.

  19. Rated 5 out of 5

    Simon Bane

    When it arrived I knew I had made the right decision. The quality of the product was instantly visible. Barely noticeable in the garden after installation.

  20. Rated 5 out of 5

    Archie West

    Completed significant market research. A huge range of products out there. Many seem to make false claims. I found out that every plant has an independent test certificate showing power use and treatment standards so just compared these and went for the quickOne then. Easy choice in the end.

  21. Rated 5 out of 5

    A Fenton

    My installer was very pleased when he hears I had purchased a biocell plant. Watched the installation and it looked like a really high quality bit of equipment.

  22. Rated 5 out of 5

    paul whittington

    very nice unit. almost invisible after installation 🙂

  23. Rated 5 out of 5

    A. Shortt

    Good advice, good product. Recommended.

  24. Rated 5 out of 5

    P Ringwood

    A highly engineered product. Recommended.

  25. Rated 5 out of 5

    Paul Rinder

    Was confused about what plant to go for until I compared all the systems Independent test certs. The Biocell plant has way lower running costs and way higher treatment levels. I dont know what anyone would buy elsewhere.

  26. Rated 3 out of 5


    A little unsure about these reviews? As you read through them they seem to cover all angles, suspicious of authenticity, would appreciate a comment from supplier replying to some negative comments? And not the half complaint about location and late delivery,…there cannot have only been all good comments

    • James Clarke

      The honest answer is that this is probably the best systems on the market, hence all the good reviews. Its the only sewage treatment plant on the market with stainless steel reinforcement internally. And the independent test certificate from PIA Gmbh in Aachen [notified CE marking tact facility] shows the Biocell QuickOne has the best effluent quality ad lowest energy use of any available system. Please email us with your details and we will send on all info to demonstrate this. Thanks for your comments.

  27. Rated 1 out of 5


    What happens to the sludge?

    • James Clarke

      Thanks for your question Ken. The process the QuickOne+ uses stabilises the sludge produced – thereby reducing volumes produced relative to other systems. So while sludge is produced, the volume is minimal. Aerobic stabilisation is performed simultaneously in our QuickOne+ plant, whereby primary and secondary sludges are continuously aerated for long periods of time. In aerobic digestion the microorganisms extend into a respiration phase where materials previously stored by the cell are oxidized, resulting in a reduction of the biologically degradable organic matter or sludge. If you have any other questions, feel free to leave your contact details using the contact and we’ll get in touch.

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