GD422.Wastewater Brochure - Gwin, Dobson & Foreman, Inc.

Gwin, Dobson & Foreman, Inc.Has Been Providing WastewaterEngineering Services For AlmostFifty Years.You Can Count On OurVast Experience And ThoroughKnowledge To Provide Effective,Practical Solutions For All Aspects OfWastewater Projects.• Planning• Treatment• Collection• Conveyance• Overflow Control• Biosolids Management• Operations3

WAS T EWATE R M A N AGEMENT P L A N N I NGWAS T EWATE R T R E AT MEN TAs a leader in the planning of wastewater management projects,Gwin, Dobson & Foreman, Inc. sets the pace in technological innovation.We pioneered the use of computer modeling in characterizing CSO overflowsand downstream receiving water quality. Our staff has conducted extensivechemical and biological analysis of non-point source pollution andstormwater discharge effects.Although we use sophisticated analytical techniques, we are always mindfulof practicality and function; GD&F has conducted hundreds of facilitiesplanning studies that have benefitted thousands of people through newwastewater collection and treatment systems.Highly trained, skilled in the most current technologies and well versedin new regulatory standards, our engineers, scientists and techniciansmake good use of their extensive planning experience.No matter the size or complexity of the project, we always apply rigorousstandards to ensure each client receives the best and most economicalsolution.Gwin, Dobson & Foreman, Inc.’s extensive treatment facility designs include100 plants with capacities ranging from less than 20,000 G.P.D. to exceeding25 M.G.D.We are experienced in all treatment technologies, including:• Primary And Preliminary Treatment,Including Mechanically CleanedScreens, Comminutors And Grinders,Aerated Grit Chambers, HorizontalFlow Grit Chambers, Grit Washers,Receiving Septage Stations, AndOdor Control• Suspended-Growth BiologicalTreatment, Including ConventionalActivated Sludge, ExtendedAeration, Contact Stabilization,Tapered Aeration, Step Feed AndComplete Mix High-Rate Aeration• Oxygen Transfer And Mixing Systems,Including Porous And NonporousDiffusers, U-Tube And Jet Aeration,Mechanical Surface Aerators,Submerged Turbine Aerators/DraftTubes And Aspirating Devices• Aeration Basin Configurations,Including Oxidation Ditch, SequencingBatch Reactors, Contact Stabilization,Complete Mix And Plug Flow• Secondary Clarification, IncludingBasin Geometry And ReturnMechanisms, Flocculating CenterWells, Intrachannel Clarifiers AndBaffling• Single-Stage Nitrification Process• Attached-Growth BiologicalTreatment, Including Trickling Filters,Rotating Biological Contactors AndDual Processes (Fixed Film/Suspended-Growth Systems)• Natural Systems, IncludingFacultative Ponds, Partial-MixAerated Ponds, Soil AbsorptionSystems And Constructed Wetlands• Nutrient Control Systems, IncludingNitrogen Removal, DenitrificationFilters And Chemical Polishing• Effluent Disinfection, IncludingChlorination, Dechlorination AndUltraviolet And OzonationDisinfection• Advanced Wastewater TreatmentProcesses, Including Granular MediaFiltration, Activated CarbonAbsorption And PhosphorusPrecipitation• Residual Solids Handling,Concentration And Utilization,Including Sludge Gravity/Centrifugal/Gravity-Belt Filter/RotaryDrum/Pressure/Drying Bed, Thickening-Dewatering, Anaerobic And AerobicSludge Conditioning, Thermal DryingAnd Land Application And Disposal45

WAS T EWATE R C O L L E C T I O NWAS T EWATE R C O N V E YA N C EGwin, Dobson & Foreman, Inc. has designed thousands of miles ofwastewater collection systems in small rural communities and largeurban areas.We use the most sophisticated computer hydraulic design technology tooptimize our design. Through monitoring and modeling, we can accuratelyassess the condition of existing collection systems to determine the mostcost effective rehabilitation methods.Conveyance systems, including pumping facilities, interceptor sewers andforce mains, are integral components of most wastewater projects.Gwin, Dobson & Foreman, Inc.’s comprehensive design experience with gravity/pressuresystems is significant. We use computer modeling in designing gravityand pressure pipelines for the full range of flow conditions.We have the practical knowledge of pump operation and hydraulics that isessential to effective pump station design. Our experience goes far beyonddesk-top office analysis. We gain invaluable knowledge and experience throughhands-on debugging, troubleshooting, and hydraulic/electrical testing.Our repair technicians dismantle andreassemble pumps to determine theiroperating effectiveness.Gwin, Dobson & Foreman, Inc. usesthe latest in control and instrumentationsystems. From simple rheostats tocomplicated variable speed/process pacedpump controls, we have the experiencethat wastewater system owners deserveand today’s environment demands.67

STORMWATER & COMBINED SEWER OVERFLOW CONTROLB I OSOLIDS M A N AGEMENTAmendments to the Clean Water Act and increased public awarenesshave spotlighted the effects of combined sewer/separate sewer overflowsand stormwater discharges.Gwin, Dobson & Foreman, Inc. has the proven ability and experience thatthese projects demand. Our original research and practical design ofCSO/SSO and stormwater control facilities have received national recognition.We are at the forefront of CSO/SSO and stormwater control technology andapply the best available remedies that are functionally appropriate andaffordable.Gwin, Dobson & Foreman, Inc. offers full services in the handling,concentration, stabilization and use of process residual solids andhas designed a full range of sludge processing facilities. We frequentlyuse our in-house laboratory and pilot testing equipment to determinesludge characteristics and parameters.GD&F uses computer modeling (including HEC-1, HEC-RAS, STORM,SWMM, Sewer CADD, Pipeworks, etc.) to set hydraulic, hydrologicand water quality designparameters. When appropriate,we calibrate these results withfield monitoring data.89

O P E R A T I O NALA S S I STANC EGwin, Dobson & Foreman, Inc. is known forpractical solutions to facility operation problems.Wastewater plant operators know that they can relyon our responsive, hands-on technical staff whenquestions arise. Our certified personnel have theexperience to solve operational problems, whateverthe type of mechanical and electrical systemor nature of the process.10

GWINDOBSON &FOREMAN incCONSULTING ENGINEERS3121 FAIRWAY DRIVE ALTOONA, PA 16602814.943.5214 FAX 814.943.8494E MAIL: Mail@gdfengineerswww.gdfengineers.com© 2000 GD&F, INC