1 / 12

Biological Wastewater Treatment

Biological Wastewater Treatment. OVERVIEW DEFINE TERMS PURRPOSE ADVANTAGES DISADVANTAGES METHODS AND KINDS AEROBIC ANAEROBIC. DEFENITIONS. BOD - Biochemical Oxygen Demand- 5 DAY TEST COD – Chemical Oxygen Demand AEROBIC -Uses Air(Dissolved Oxygen)

luyu
Download Presentation

Biological Wastewater Treatment

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Biological Wastewater Treatment

  2. OVERVIEW • DEFINE TERMS • PURRPOSE • ADVANTAGES • DISADVANTAGES • METHODS AND KINDS • AEROBIC • ANAEROBIC

  3. DEFENITIONS • BOD- Biochemical Oxygen Demand- 5 DAY TEST • COD – Chemical Oxygen Demand • AEROBIC-Uses Air(Dissolved Oxygen) • ANAEROBIC-Without Air- Byproduct is Methane • ANOXIC- Oxygen Source is Nitrates NO3 andNitrites NO2.

  4. PURPOSE: Optimization of a naturally occurring process that reduces contaminants in the water. Advantages: Treat large flow rates at low Operating Costs Removes Dissolved contaminants Disadvantages: Generates waste biomass

  5. BIOTREATMENT • Biological Treatment Methods • Sequence Batch Reactor (SBR) • Membrane BioReactor (MBR) • Attached Growth Biological Filters • Biological Aerated Filter (BAF) • Moving Bed Biological Reactor (MBBR) • Integrated Fixed Film Activated Sludge (IFAS) • Trickling Filters • 4) Anaerobic Treatment Processes • Upflow Anaerobic Sludge Blanket (UASB) • Expanded Granular Sludge Bed (EGSB)

  6. SEQUENCE BATCH REACTOR (SBR) • Batch aerated reaction process followed by a controlled sedimentation step. • Benefits: • Low capital costs • Tolerant to flow variations and loading variations. • Flexible fully automated process • Proven Technology Sequence Batch Reactor

  7. SEQUENCE BATCH REACTOR (SBR) • Disadvantages: • Larger footprint than MBR • Tertiary filter needed to achieve highest quality effluent • Higher Sludge Production than MBR. • Temperature adjustment needed. Sequence Batch Reactor

  8. MEMBRANE BIO-REACTOR (MBR) • Aeration Tank followed by an attached growth membrane. • Benefits: • Highest level of treatment up to 99% reduction in one step. • Lower sludge production than SBR • Smallest Footprint for Biological Treatment • Proven Technology Membrane Bio-Reactor

  9. MEMBRANE BIO-REACTOR (MBR) • Disadvantages: • Higher Energy Costs (Larger Blowers, Larger Pumps) • Large Equalization tank needed. • Higher capital costs • Temperature Adjustment Needed Membrane Bio-Reactor

  10. TRICKLING FILTER • Attached Growth Biological Downward Flow reactor • Benefits: • Low capital Cost • Low operation and maintenance costs • Well suited for high BOD/COD loads Wastewater Treatment w/ Biological Fixed Bed Filtration

  11. TRICKLING FILTER • Disadvantages: • 75-90% Reduction in BOD/COD levels • Temperature Adjustment needed • Regular flushing needed Wastewater Treatment w/ Trickling Filter

More Related