Biological treatment systems are commonly used to treat municipal wastewater and sewage, as well as sludge and industrial effluents. Read More

Biological systems use bacteria, in either aerobic or anaerobic conditions, to break down organic matter into carbon dioxide and cellular mass.

Packaged treatment plant are typically suitable for population equivalents under 400. They range from plants for single houses to systems for housing estates, caravan parks or leisure applications.

Engineered systems tend to be specified for population equivalents over 400, and particularly in industrial applications. Engineered systems can consist of a modular arrangement of packaged plant.

Submerged aerated filters (SAF) are small footprint units with few moving parts. They are designed for treating municipal wastewater, producing effluent <20mg/l BOD, <20mg/l TSS and <5mg/l NH3.

Membrane bioreactors (MBRs) combine a submerged membrane filtration process with a bioreactor. They are compact and produce a high-quality effluent, generally <2mg/l BOD, <2mg/l TSS and <0.6mg/l NH3.

Other technologies include biological aerated filters (BAF), sequencing batch reactors (SBR), moving bed biofilm reactors (MBBR) and continuous flow reactors (CFR).

Reedbeds and constructed wetlands  are an alternative biological treatment system that use bacteria attached to the surface of soild, sand or gravel media to treat wastewater, run-off, sewage and other contaminants. 

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Biological treatment - helping you find the best solution for your project.

  • Puriflo - a division of ESE Engineering: Membrane bioreactors
    Membrane bioreactors
    Puriflo - a division of ESE Engineering
    Puriflo's membrane bioreactors feature submerged aerated media, offering high performance with low electrical running costs and requiring little maintenance. They are manufactured with flat-sheet membranes and are designed...
  • ARM Ltd: Success case studies using aerated reed beds
    Success case studies using aerated reed beds
    ARM Ltd
    Buffalo Airport is in Washington State (USA) and generates significant loads of runoff contaminated with anti-freeze. This had been a difficult issue to resolve in wintertime, as large volumes of runoff and snow melt...
  • 2H Water Technologies: Trickling Filters deliver guaranteed performance
    Trickling Filters deliver guaranteed performance
    2H Water Technologies
    Having already supplied a number of trickling filter solutions on various wastewater sites in Scotland, 2H Water was approached by Scottish Water Solutions. They needed to treat effluent from the city of Stranraer and...
  • 2H Water Technologies: Trickling filters reduce ammonia level for Severn Trent
    Trickling filters reduce ammonia level for Severn Trent
    2H Water Technologies
    Severn Trent Water had been operating the Longbridge STW with rock media trickling filters but, whilst the BOD reduction was being achieved, the existing plant would not be able to meet future ammonia consent levels.
  • Puriflo - a division of ESE Engineering: Sequential batch reactors
    Sequential batch reactors
    Puriflo - a division of ESE Engineering
    Puriflo has wide experience in building sequential batch reactors, a form of activated sludge treatment in which both aeration and settling take place in the same tank. The process can only be applied in cases where the flow...
  • Puriflo - a division of ESE Engineering: Activated sludge treatment
    Activated sludge treatment
    Puriflo - a division of ESE Engineering
    Puriflo has wide experience with activated sludge treatment systems for treating industrial effluent. The treatment consists of an aeration tank in which a bacterial culture is given oxygen by aeration, enabling it to...
  • ARM Ltd: Ferric sludge reed bed treatment for potable water
    Ferric sludge reed bed treatment for potable water
    ARM Ltd
    Essex & Suffolk Water installed the world’s first natural reed bed system to treat ferric sludge produced during the production of drinking water at its Hanningfield Water Treatment Works. It was estimated that the reed beds...
  • ELIQUO HYDROK: Microdyn-Nadir BIO-CEL® MBR
    Microdyn-Nadir BIO-CEL® MBR
    ELIQUO HYDROK
    ELIQUO HYDROK has the rights for the UK distribution of the Microdyn-Nadir BIO-CEL® Membrane Bio Reactors to add to a portfolio of wastewater treatment processes. The MBR process is a combination of a classic activated...
  • ELIQUO HYDROK: IFAS enhanced biomass fixed bed system
    IFAS enhanced biomass fixed bed system
    ELIQUO HYDROK
    The Hydrok IFAS™ (Integrated Fixed-Film Activated Sludge) system utilises Biotextil Cleartec media for the growth of biomass for the treatment of effluent. Biotextil Cleartec is a polypropylene product that creates a large...
  • ARM Ltd: Phytocube compact reedbed treatment system
    Phytocube compact reedbed treatment system
    ARM Ltd
    Phytocube is a compact, modular reedbed treatment system designed for low flowrates of wastewater. Suitable for single houses and small industrial applications, the Phytocube provides all the benefits of reedbed treatment...
  • ELIQUO HYDROK: HY-SAF hybrid submerged aerated filter
    HY-SAF hybrid submerged aerated filter
    ELIQUO HYDROK
    The ELIQUO HYDROK Hybrid Submerged Aerated Filter (HY-SAF) offers a power efficient, robust, small footprint biological wastewater treatment solution individually designed to achieve the final effluent consent standard...
  • ARM Ltd: Phragmifiltre® reedbeds for sewage treatment
    Phragmifiltre® reedbeds for sewage treatment
    ARM Ltd
    Phragmifiltre® is the first reedbed technology in the UK that provides complete treatment of macerated or raw sewage in a single wetland system, with no pre-settlement and little or no power requirement. The system can treat...
  • H+E UK: BIOFIT®.Oxyd2 advanced oxidation process
    BIOFIT®.Oxyd2 advanced oxidation process
    H+E UK
    The BIOFIT®.Oxyd2 process is used for the treatment of wastewater where the pollutants are difficult or impossible to remove using conventional biological processes alone. It uses a chemical oxidation process to break down...
  • H+E UK: ANAFIT.CS expanded granular sludge bed digestion (EGSB)
    ANAFIT.CS expanded granular sludge bed digestion (EGSB)
    H+E UK
    ANAFIT.CS is a reliable and very effective method for the cleaning of heavily mineralised wastewater from the industrial production process in the food industry. It is based on the anaerobic contact sludge process and...
  • ARM Ltd: Horizontal flow reedbed refurbished for water company
    Horizontal flow reedbed refurbished for water company
    ARM Ltd
    The Eden Valley Mineral Water Company (EVMWC), based at Armathwaite in Cumbria, had an existing reedbed asset which, due to changes in production loads, was not operating optimally. The modifications undertaken by ARM...
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Biological treatment- helping you find the best companies for your project.