Technologies for waste water treatment

Sequential Batch Reactor - SBR

Sequential = following in a logical order or sequence.
Batch = arrange in sets or group
Reactor =Reactors for Biological treatment
The Sequencing Batch Reactor (SBR) is an activated sludge process designed to operate in a batch mode with aeration and sludge settlement both occurring in the same tank. Difference between SBR and activated sludge system is that the SBR tank carries out the functions of equalization, aeration and sedimentation in a time sequence.
An appropriately designed SBR process is a unique combination of equipment and software. Working with automated control reduces the number of operator skill and attention requirement.

There are basically five stages to treatment :
Static Fill Aerated Fill React Settle Decant
SBRs are broadly used in both industrial and municipal applications and especially where low or intermitted flow conditions apply.

Advantages

  • Small foot print, Simple Design & Power saving Technology.
  • Suitable for variable organic and hydraulic load.
  • No Clarifier required.
  • No sludge recirculation required

Major Installations

DLF Garden City STP Gurgaon 2.0 MLD
MD Frozen Foods Pvt Ltd ETP Ghaziabad 1.0 MLD
Tata Primanti STP Gurgaon 550 KLD
Meem Agro Foods Pvt Ltd STP Shamli 500 KLD
Oberoi Flight Services STP IGI Delhi 450 KLD

 

Moving Bed Bio Reactor - MBBR

Moving Bed = Mobile surface
Bio Reactor = Bio reactor for biological treatment
MBBR is an improved version of Fixed Film Bio Reactor like SAFF (Surface Area Fixed Filmed Technology (SAFF) or Rotating Bio Reactor (RBC), with a difference of MBBR carrier media is free floating in the Sewage/Effluent. MBBR technology employs thousands of polyethylene biofilm carriers operating in mixed motion within an aerated wastewater treatment basin.
A Moving Bed Biofilm MBBR reactor consists of a tank with submerged but floating plastic (usually HDPE, polyethylene or polypropylene) media having specific gravity less than 1.0. The large surface area of the plastics provide abundant surface for bacterial growth.
Advance MBBR: For high BOD Degradation (Usually less than 5-6mg/ltr) Brisanzia provides special Porous spherical beads Media made-up of Poly Vinyl Alcohol (PVA GEL) which provides high surface area for Microbial growth.

Advantages

  • MBBR is stable under load variations, insensitive to temporary limitation and provides consistent treatment results Its generates low solids and requires no or minimum polymer for solid/liquid separation.
  • It requires a small footprint. Typically it requires 1/3rd the space required for Activated Sludge Process.
  • It is easy to operate, has automatic sludge wasting, has no sludge Return and no MLSS, and there no issue of media clogging.

Major Installations

RPS Group STP Faridabad 2.0 MLD
MIPL Mywoods STP G. Noda 1.65 MLD
Ireo Ltd – Skyon Projectd STP Gurgaon 900 KLD
K World Group STP Ghaziabad 900 KLD
Sare Group – Green ParC STP Gurgaon 850 KLD

 

Membarne Bio Reactor - MBR

Membrane = A thin sheet of natural or synthetic material that is permeable to sludge
Bio Reactor = Reactors for Biological treatment
Membrane bioreactor (MBR) is the combination of a membrane filtration process with a suspended growth bioreactor. It is a very advanced technology and is now widely used for municipal and industrial wastewater treatment.
As its name tells, the process makes use of membranes. The nominal pore size of the membranes is small (up to 0.15μm), by which not only activated sludge but also coliform bacteria and virus can be shut out. The mixed liquor from the biological treatment can be separated clearly into solid and liquid. It assures almost 100% removal of SS and no carryover of SS into the effluent.
This process, therefore, assures stable treated water quality, which enables the treated water to be reused as reclamation water.

Advantages

Most important aspect of MBR technology is production of very high quality Treated Water consistently.
  • Complete independent control of HRT (Hydraulic Retention Time) and SRT (Sludge Retention Time), which allow more complete reduction of COD, and improved stability of processes such as nitrification.
  • Process intensification through high Biomass concentration with MLSS (Mixed Liquor Suspended Solids) over 8000 – 10000 ppm.
  • Lower footprint than other technologies.

Major Installations

GAIL STP Pata U.P. 1.0 MLD
Ireo Ltd ETP Gurgaon 300KLD
IMT Hyderbad STP Hyderbad 130 KLD
Haryana Tourism Corp. STP Pinjor 50 KLD
Mann Residency STP Noida 25 KLD

 

Extended Aeration - EA

Extended = Cause to cover a larger area
Aeration = the process of exposing to air
Extended Aeration is a type of activated sludge process with no primary settling and longer aerobic detention time to generate less excess sludge overall. It is a biological treatment process, which is able to produce high quality effluent at a reasonable operating and maintenance costs.
The Extended Aeration process is widely used by large cities and communities where large volumes of wastewater must be treated highly economically. Extended Aeration plants are good choices too for isolated facilities, such as hospitals or hotels, housing developments and even individual residences.

Advantages

The Extended Aeration is the most popular biological treatment process for larger installations or small package plants being used today. The reason for this is their ability to produce a high quality effluent for the price. Other advantages of the Extended Aeration process are its stability, the ease of installation and operation of systems, the low operating and maintenance costs, handy operation the low sludge yield and the odourless operation.

Major Installations

J.P. University STP Anupshahr 1.5 MLD
DLF-New Tower Height STP Gurgaon 1.3 MLD
DLF Universal Ltd STP Gurgaon 1.11 MLD
DLF Ltd New Town Height STP Kolkata 750KLD
DLF Ltd scctor-91 STP Gurgaon  

 

Submerged Aerobic Fix Film - SAFF

Submerged = Descend below the surface of an area of water.
Aerobic = Presence of air
Fixed Film = attached or placed so as to be immovable
Submerged Aerobic Fixed Film (SAFF) process uses support media to retain an active biomass to reduce the influent BOD Levels. Tubular/Disc diffusers are used with the SAFF media giving a good air dispersal and low level of blockage due to growth of biological film. SAFF reactor is a type of aerobic attached growth treatment process. Small foot print area, stable process, lesser sludge production and modular installations are the key features of SAFF process. Essentially SAFF system is a hybrid reactor where attached growth and suspended growth activity takes place simultaneously.
This technology utilizes an aerobic fixed film process that is a combination submerged attached growth and activated sludge processes. SAFF is highly suitable for medium and low strength wastewater. This is a cost-effective method of waste water treatment and sewage sanitation.

Advantages

  • No sludge re-circulation is required to maintain MLSS as in the case of conventional aeration system.
  • SAFF system takes higher shock loads without reducing the plant performance because of large quantity of Bio mass available in the reactor.
  • SAFF supports increased SRT which results in to low sludge generation, low Odour and low visual impact.
  • Modular expandability.

Major Installations

Vinayak Textile Mills Ltd ETP Ludhiana 2.0MLD
DLF Garden City Ltd STP Indore 750KLD
Raheja Developers STP Gurgaon 550KLD
Erose Rosewood City STP Gurgaon 350KLD
Sangri-La's Hotel STP Delhi 325 KLD

Zero Liquid Discharge - ZLD

Zero liquid discharge systems employ the most advanced wastewater treatment technologies to purify and recycle virtually all of the wastewater produced. Also Zero liquid discharge technologies help plants meet discharge and water reuse requirements.

ZLD technology includes pre-treatment and evaporation of the industrial effluent until the dissolved solids precipitate as crystals.

These crystals are removed and dewatered. The water vapor from evaporation is condensed and returned to the process.

Normally the evaporation-crystallizing section receives the reject from a reverse osmosis section that concentrates dissolved solids. To prevent fouling during the reverse osmosis process, ultra filtration is often used to eliminate suspended solids.

Brisanzia can deliver solution to Industry in achieving the ZLD project by implemented high performance membrane technology which can deliver 90% of pure water, which can be recycled back to process or any other critical applications.

Remaining high solids stream can be evaporated by multiple effect evaporator.

Brisanzia is ISO 9001 : 2008 and ISO 14001:2004