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MBR process is based on use of Submerged membranes for solid liquid separation. It belongs to Membrane Bioreactor (MBR) family Low Footprint and high reuse quality water treatment.

How MBR – Membrane works?

  • In the Bioreactor, clean water gets collected in the hollow fiber cavity, leaving the biomass outside

  • Backwash is regularly applied to prevent clogging (fouling) of hollow fiber membrane

  • High MLSS (6,000 – 12,000 mg/L) => low HRT => small reactor volume => small plant footprint area

  • Biomass separation is independent of settling; separation is via micro filtration or ultra filtration.

  • Biomass is completely retained, TSS (< 1 mg/L) and turbidity (< 1 NTU) is very low.

  • Due to microfiltration or ultrafiltration, MBR provides a perfect physical disinfection.


  • 5-6 log bacteria, 2-3 log viruses’, complete removal of pathogenic protozoa such as the chlorine-resistant Cryptosporidium and Giardia.

  • Automatic operation, operator requirements are reduced

  • Due to elevated SRTs: less prone to problems associated with nitrification and toxic or less biomass yield => less sludge

  • Due to high MLSS, shock loads can be easily handled

  • Better SRT control since no escape of TSS as occasionally observed from secondary clarifiers

  • Can also remove nitrogen and phosphorus with the addition of anaerobic and anoxic zones


  • Extremely low space requirement Simple construction makes for easy repair and replacement

  • Custom design and low capital and operation cost makes MBR installation in most difficult location easier

  • There is reduced demand for post treatment chlorination

  • Low sludge generation compared to conventional treatment process

  • Treated water quality is ideal for Flushing and other non-potable applications.

  • Plants can be underground, over ground, basement based etc.

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MBBR is a highly effective biological treatment process based on a combination of conventional activated sludge process and biofilm media. The MBBR process utilizes floating High Capacity MicroOrganism BioChips media within the aeration and anoxic tanks. The microorganisms consume organic material. The media provides increased surface area for the biological microorganisms to attach and grow. The increased surface area reduces the footprint of the tanks required to treat the wastewater. The treatment process can be aerobic and/or anaerobic and operates at high volume loads.


Moving Bed Biofilm Reactor (MBBR) sewage treatment plant is a simple and reliable method of treating wastewater. Due to simple operations and easy manageability, it is better than the conventional methods. MBBR uses a cluster of polyethylene bio film carriers that move randomly in the aerated basin containing wastewater. Since each carrier offers an effective surface area to cater the autotrophic and heterotrophic bacteria, this system is useful for a high-density population of bacteria. High degrees of reliability and ease of operation are assured by the MBBR system.


Our MBBR sewage treatment plant is ideal for removing physical, chemical and biological impurities from the wastewater produced by the kitchen, toilet or industries. We offer a world-class solution that is economical, hassle-free and multipurpose. Whether you choose MBBR treatment or Underground sewage treatment plant, it can be installed easily in a small area. It is ideal for small and medium level usage also because of lower installation, operation and maintenance costs


SBR is a high-performance solution for wastewater treatment that can successfully handle batch and continuous flow operations. It is a proven technology with minimal costs and maintenance requirements. Due to high removal capacity and versatility, it is compliant with stringent discharge standards. Biological process and high-quality product generation are the distinct qualities of SBR based sewage treatment plant.

Due to streamlined design, Cleantech SBR small Sewage Treatment Plant is one of the most favored wastewater treatment systems today. This highly flexible technology is useful in a wide variety of applications.

What is SBR Based Sewage Treatment?

SBR process is a widely used water treatment method in the developed countries from quite a long time. It has become popular in India, China, and other Asian countries in the recent years. When sewage is sent to the SBR Tank (also known as Reaction tank) one batch at a time, an activated sludge process gets activated. Timed sequence of operations occurs in the SBR tank and water gets purified. Here is the timed sequence if events:


It is the first stage of the process where the influent wastewater is filled in the first tank. It is important that the water gets filled with a controlled yet rapid flow so that the Food to Microorganism Ratio remains appropriate. It is similar to the selector mechanism which ensures sufficient growth of microorganisms that have better settling characteristics.


In the reaction stage, microorganisms use Ammonia, Nitrogen or BOD (Biochemical Oxygen Demand). The degree of treatment is directly proportional to the sludge mass and the time taken for aeration. It also depends on the strength of the wastewater (or the level of impurities) and the degree of nitrification. It is the rate of conversion of Ammonia into nitrate or nitrite of less toxicity.


Settling takes around 60 minutes to 90 minutes depending on the number of cycles per day. In this process, aeration stops and sludge gets settled. Cleat, effluent water gets accumulated over the sludge blanket.


Decanting is the process of removing the effluent from the tank without disturbing the sludge settled at the bottom.


Idling is the waiting time between two filling cycles.

Sludge Wasting

When sludge gets accumulated beyond a threshold level, it has to be discharged from the system. Sludge wasting process controls the quality of effluent water and the population of microorganisms. Two parameters are adjusted to keep better control over the quality of sludge wasting.

✦ Mixed liquor suspended solids (MLSS)
✦ Mean cell residence time (MCRT)

SBR Tank acts as the aeration tank in the reaction stage when activated sludge and influent water are mixed under aerated conditions. It also works as the secondary clarifier during two stages; settling stage and decanting stage. Mixed liquor is again allowed to settle, and the overflow moves to the next stage of treatment. In the Sludge Return System, after settling in the SBR tank, influent gets mixed with sludge return system again. However, in this case, the feed is transferred to the sludge and not vice-a-versa.

Usage and application

SBR based sewage treatment plant is ideal for several applications:

  1. It is the best suitable system for heavy loads of industrial or municipal wastewater. SBR process is ideal for both cold and warm climates.

  2. Streamlined design keeps equipment and operating costs optimized.

  3. It can be upgraded easily in a cost-effective manner.

  4. Meets requirement of cleaning effluents without getting affected by prevalent conditions.

  5. Around 98 percent removal of TSS and BOD, reduction of Phosphorus and Nitrogen in one step.

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