Advanced Wastewater Treatment and Disposal Systems Water and Wastewater Utility Operation and Management for Tribes
Preliminary Treatment Primary Treatment Secondary Treatment Tertiary Treatment Disinfection Sludge Removal Treatment System
Preliminary Treatment Screening Remove Large Solids Parallel Bars Placed in Channel Course Screen (2-4 Inch Range) Fine Screen (0.75-2.0 Inch Range) Manual or Mechanical copyright 2008 2009 www.infobarscreens.com
Gravity/Velocity Removal Cyclone Degritter Preliminary Treatment
Preliminary Treatment Inspect Periodically to Ensure Screen is Free of Obstructions Replace Hydraulic Fluid if Necessary Oil Change/Checks Should Be Done on an Annual Basis Dispose of Screenings at an Approved Location
Primary Treatment s City of Hagerstown, Utilities Department
Manage Fats, Oils, and Grease at the Source FOG Management Grease Interceptors: Source: http://www.oracwa.org Commercial and Industrial Facilities Management plan in place for frequent pumping p based on loading Tank pumping by grease hauler or septic tank pumper Recordkeeping
Rotating Biological C
Name two recommended maintenance procedures that should be performed after 3 months of startup of an RBC system.
SBR http://www.epa.gov/nrmrl/pubs/625r00008/html/tfs3.htm
SBR http://www.cee-environmental.com
SBR Basic Maintenance Needs Check air distribution Adjust cycle times to meet treatment goals Follow manufacturer s recommendations
Activated Sludge
Activated Sludge Blower with Air Pipingi
Activated Sludge Daily Operation Checks: Tank Appearance Equipment Operation and Lubrication Return Sludge Line Hose Down Accumulated Sludge From Hoppers and Clarifier Tanks Brush Weirs to Remove Algae and Captured Materials Skim Off Grease and Other Floating Material
Wasting Sludge: Activated Sludge Required to Maintain a High Degree of Effluent Quality Rule of Thumb - Waste 5% of Solids Each Week During Summer To Prevent Excessive Solids Burping Measuring MLSS in Aeration Tank >Laboratory y Equipment >Jar Test
What is white fluffy foam in the aeration chamber a sign of? Copyright 2003. Environmental Leverage Inc.
What is brown leathery foam in the aeration chamber a sign of? Copyright 2003. Environmental Leverage Inc.
Oxidation Ditch
Oxidation Ditches Control Methods Similar to Activated Sludge Process: Food Supply Dissolved Oxygen Levels (DO) Ditch Environment Ditch Detention Time Proper Water/Solids Separation Copyright Jewett City WWTP, CT Copyright Williams Industrial Services Ltd
Oxidation Ditches Food Supply for Microorganisms: Measured as Biological Oxygen Demand (BOD) No Toxicants Proper Pretreatment Facility Inspection
DO Levels: Oxidation Ditches Rotors Supply Oxygen to Waste Flow Maintain DO Concentration of 0.5 To 2.0 Mg/L Upstream of Rotors Over Oxygenation can Cause Floc to Form Control of Rotor Oxygenation by Adjusting Outlet Control Weir Copyright 2010 Spaans Babcock Copyright 2004 by City of Princeton
Membrane Bioreactors Reactor Basin Permeate Pumps Reactor Basin Permeate Pumps Infrastructure Alternatives Inc.2007 Infrastructure Alternatives Inc.2007
Membrane Bioreactors Monitor Trans Membrane Pressure (TMP) Clean Membranes with Sodium Hypochlorite Solution (0.5%) Cleaning Typically 2-4 Hours Once Every 6 Months
To Anerobic Tank Train 1 Train 2 Influent To Anerobic Tank Anoxic Tank, Mixing & Carbon Addition Kaiser Blowers Aeration Membrane RAS Permeate Pumps (Under Vacuum) RAS Effluent to UV Sludge Wasting
Chlorine Disinfection All Rights Reserved by Conrad Strehlau
UV Disinfection 2011 Copyright Calgon Carbon Corporation
UV Disinfection 2011 Copyright Calgon Carbon Corporation
Treated Effluent Disposal Return Treated Effluent to Environment Receiving Waters Reclaimed Water Use Land Disposal
Treated Effluent Disposal
Treated Effluent Disposal Caution needed to prevent heavy equipment above facilities not designed to take the weight
Treated Effluent Disposal Regular removal of vegetation in open soil beds required Be careful not to compact soils
Treated Effluent Disposal
Sludge Disposal Major Problem facing Operators Solids Removal Originates from: Bar Racks Screens Grit Removal Aerobic Processes Anaerobic Processes
Disposal Options: Dewatering Direct Burial Incineration Composting Land Application Sludge Disposal
Sludge Disposal Removing Wasted Sludge: Pumper Truck Removal Aerobic Digester Portable Pumping Unit Drying Beds Copyright 2010 ITT Water & Wastewater Copyright 2009 Color Bold Copyright ECO Friendly Shelters
What Have We Learned? Components of Wastewater Treatment Facilities Typical Treatment Systems Used in Larger Facilities Common O&M Issues