Process biotechnology application to industrial wastewater treatment plants

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Process biotechnology application to industrial
wastewater treatment plants

• PROF AVN SWAMY,
• Vice Principal, JNTUACE
• Pulivendula

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Clarifier
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Anaerobic Digester
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Typical clarifier
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PPS compact clarifier
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Typical ETP flow sheet
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Aeration tank-Diffused aeration
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Bioeactors
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• This unique stand-alone Bioreaction system can be
  placed into almost any Hydrokleen wastewater
  treatment system. This unit will dramatically
  assist existing treatment systems. The HE-BR-500
  can be added to any system where light
  hydrocarbons, high concentrations of oils and
  grease, antifreeze, pesticides, organic nitrogen
  and other liquids are a problem.

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Moving bed Bioreactor

• As contaminated water enters the Bioreactor it is
  slowed down to allow for solids to fall to the
  bottom of the tank and evenly coat the biomass.
  Being a moving bed reactor the biomass is
  systematically rotated allowing all portions of
  the media to be exposed to the influent. These
  provide the biodigesters an unlimited surface
  area for bio-reaction to occur. Pre-packaged in a
  liquid form, the Hydro-Biodigesters are dispensed
  automatically into the biomass. Automatic dosing
  allows precise use of the biological product for
  maximum digestion of waste. Water passes from the
  system automatically where it can be discharged
  for reuse or sanitary sewer. Head pressure purges
  the accumulated sludge, eliminating the
  requirement to manually remove solids.
• Dual 5500 gallon Bioreactors for use in high-flow
  wastewater recycling or pre-treatment for
  discharge to sanitary sewer. Bioreaction take
  time, the flow rate and substrate to be broken
  down determine the size of the system. This big
  guy is 5500 gallons. The 5500 can be set up to
  break down hydrocarbons, high concentrations of
  oils and grease, antifreeze, pesticides, organic
  nitrogen and other organics. Contact us for a
  quote on your requirement.
•    

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Airlift eactors

• Since one of the recognized characteristics of
• airlift reactors is the potential for scaling up
  and
• the relatively low power consumption for
  agitation
• and oxygenation, it is only natural that many
• processes related to wastewater treatment use
  this
• type of reactors.
• Jin et al. (2002) used an airlift reactor in a
• comprehensive pilot plant system for starch
• processing wastewater reclamation. The starch was
• utilized by Aspergilius orizae. Simultaneously to
  a
• 95 COD, 93 BOD and 98 suspended solids
• removal, an important production of ??-amylase
• (50 EU/ml) was obtained (Jin et al. 1998). An
• interesting point in this paper is the dependence
  of
• fungal morphology on ALR fluid dynamics. In this
• type of processes, morphology of the fungal
• biomass is extremely important. Free mycelial
• growth (wild growth) increases strongly the
• viscosity, limiting the oxygen transfer rate from

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• The solution that has been
• almost universally adopted for this problem,
  which
• attains to citric and other organic acids,
• antibiotics, etc., is to find the conditions
  under
• which the biomass takes the form of fungal
  pellets.
• The advantage in gas-liquid transfer rate because
• of the decrease in viscosity usually overweighs
  the
• added resistance stemming from the itraparticle
• diffusion of oxygen. But the formation of pellets
  in
• optimal size and compactness is a very complex
• matter.

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MBR GE

• The ZeeWeed membrane bioreactor (MBR) process is
  a GE technology that consists of a suspended
  growth biological reactor integrated with an
  ultrafiltration membrane system, using the
  ZeeWeed hollow fiber membrane. Essentially, the
  ultrafiltration system replaces the solids
  separation function of secondary clarifiers and
  sand filters in a conventional activated sludge
  system.
• ZeeWeed ultrafiltration membranes are immersed in
  an aeration tank, in direct contact with mixed
  liquor. Through the use of a permeate pump, a
  vacuum is applied to a header connected to the
  membranes. The vacuum draws the treated water
  through the hollow fiber ultrafiltration
  membranes. Permeate is then directed to
  disinfection or discharge facilities.
  Intermittent airflow is introduced to the bottom
  of the membrane module, producing turbulence that
  scours the external surface of the hollow fibers.
  This scouring action transfers rejected solids
  away from the membrane surface.

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MBR

• ZeeWeed membrane bioreactor technology
  effectively overcomes the problems associated
  with poor settling of sludge in conventional
  activated sludge processes. ZeeWeed MBR
  technology permits bioreactor operation with
  considerably higher mixed liquor solids
  concentrations than conventional activated sludge
  systems that are limited by sludge settling. The
  ZeeWeed MBR process is typically operated at a
  mixed liquor suspended solids (MLSS)
  concentration in the range of 8,000 to 10,000
  mg/L. Elevated biomass concentrations allow for
  highly effective removal of both soluble and
  particulate biodegradable material in the waste
  stream. The ZeeWeed MBR process combines the unit
  operations of aeration, secondary clarification
  and filtration into a single process, producing a
  high quality effluent, simplifying operation and
  greatly reducing space requirements.

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