HARTWELL ENVIRONMENTAL CORPORATION

HOUSTON AUSTIN DALLAS TULSA

                                           
                                              APPLICATIONS FOR WATER AND WASTEWATER 
                                                                        TREATMENT PLANT

                                                              WATER TREATMENT PLANT

                                    SCREENING                                       SEDIMENTATION
                                    Traveling Water Screen                    Clarifier - Circular
                                    Bracket Green                                   INFILCO Degremont Recirculated Slurry
                                                                                              Walker Process
                                     FLASH MIX/CHEMICAL FEED            Clarifier - Rectangular
                                     Chemical Feed                                 Walker Process
                                      Chemco-Lime/PAC Systems
                                      Fluid Dynamics Polymer System        MEMBRANE
                                      Verder Hose Pumps                         Ultrafiltration
                                      Pulsafeeder Metering Pumps               Zenon
                                     Lightnin                                             DISINFECTION
                                     Static Mixers                                      UV                                      
                                     Komax                                               INFILCO Degremont
                                     Lightnin                                              Ozonia
                                                                                                Ozone
                                                                                                Ozonia 
                                     FLOCCULATION                                  Chlorine/Ammonia Gas Feed 
                                     Vertical                                               Severn Trent/Capital Controls
                                     Walker Process                                  Severn Trent/EST Gas Scrubbers
                                     Severn Trent/Capital Controls               On-Site Sodium Hypochlorite                                                         
                                     Horizontal                                            ClorTec                                                          
                                      JDV Equipment - Walking Beam          Chemical Feed                                       
                                      Walker Process - Paddle Wheel           Pulsafeeder Metering Pumps                                   
                                                                                                 Verder Hose Pumps
                                                                                                
                                                                                                 FILTRATION
                                                                                                 Filters
                                                                                                 Gravity
                                                                                                 INFILCO- Package and Cluster Filters
                                                                                                 Severn Trent-Tetra Underdrain
                                                                                                 Pressure
                                                                                                 Severn Trent-Tetra       
                                                                                                  Arsenic Removal          
                                                                                                 Severn Trent Bayoxide

                                                    WASTEWATER TREATMENT PLANT

               PUMPS                    BIOLOGICAL TREATMENT        FILTRATION
               Dry Pit                         Aeration                                Traveling Bridge
                Chicago Pump           Fine/Coarse Bubble                   Aqua-Aerobic
                Submersible                Aqua-Aerobic                         INFILCO Degremont
                Chicago Pump            Sanitaire                               Cloth Media Filters
                 Screw                          Jet                                          Aqua-Aerobic
                Spaans Babcock        K_La Systems                        Gravity De-Nite Filters
                                                   Surface Aerators                      Severn Trent-Tetra                                          
               HEADWORKS                Aqua-Aerobic
              Screens                         Lightnin                                DIGESTION
              Fine Screen                   Biological Media                   Anaerobic Mixing
               JWCE                         IFAS                                     JDV Equipment
               Bracket Green              Anox Kaldnes                       INFILCO Degremont
               Step Screen                  MBR                                      Walker Process 
               JDV Equipment            Aqua-Aerobic                       Aerobic
               Climber Screen               Zenon                                 Aqua-Aerobic
                INFILCO Degremont     SBR                                      Sanitaire
                Cantenary Screen           Aqua-Aerobic                      Heater/Heat Exchanger      
                  E&I Corp.                   RBC/SBC                              Walker Process 
                Grinder & Washer      Walker Process                
                 JWC Envrionmental      Blowers                                 DISINFECTION
                  Grit                               Hibon                                  UV
                  Morris Grit Pumps         Multistage Centrifugal            INFILCO Degremont
                  Walker Process            Positive Displacement            Chlorine/Ammonia Gas Feed
                  Hydro International       Anoxic Mixing                      Severn Trent/Capital Controls
                                                       Aqua Aerobic                       On-Site Sodium Hypochlorite
                                                       Lightnin                                ClorTec                             
                                                                                                   Chemical Feed
                 PRIMARY TREATMENT   CLARIFICATION                   Pulsafeeder Metering Pumps
                Clarifier                          Gravity                                Verder Hose Pumps
                Walker Process              Walker Process                     
                Scum Concentration       High Rate                            VALVES
                 Walker Process              INFILCO Degremont           Telescoping Valves
                  Rotary Scum Skimmer                                                 Online Engineering 
                 Pipes                                                                         Rotary Sludge Valves
                 Online Engineering                                                    Online Engineering 

                                                              

                                                            SLUDGE HANDLING
                                                               Thickening
                                                               GBT
                                                               Komline-Sanderson
                                                               Gravity
                                                               Walker Process 
                                                               DAF
                                                               INFILCO Degremont  
                                                               Heating
                                                               Spiral Heat Exchangers
                                                               Alfa Laval
                                                               Steam Heaters
                                                               Komax
                                                               Dewatering
                                                               Belt Press
                                                               Komline-Sanderson
                                                               Centrifuge
                                                               Alfa Laval Sharples
                                                               Dumpster
                                                               Flo Trend Systems
                                                               Chemical Feed
                                                               Fluid Dynamics Polymer System
                                                               Pulsafeeder
                                                               Conveying
                                                                JDV Equipment -Shaftless Screw
                                                                Pumping
                                                                Netzsch Progressive Cavity
                                                                Schwing Cake Pump
                                                                Peristaltic Pumps
                                                                Verder Hose Pumps 
                                                                Lime Feed
                                                                Chemco-Lime Stabilization
                                                                Sludge Drying
                                                                Komline-Sanderson

                                                                GATES
                                                                Sluice, Slide and Weir Gates
                                                                Hydro Gate

                                                                ODOR CONTROL
                                                                Chemical Scrubber
                                                                Severn Trent/EST
                                                                 Bio Scrubber
                                                                PRD Tech
                                                                Covers
                                                                Conservatek - Aluminum
                                                                Activated Carbon Systems
                                                                Carbtrol
                                                                Ionizer
                                                                Vapex
                                                                Biofilter
                                                                PRD Tech

                                                                RE-USE
                                                                Filtration
                                                                Traveling Bridge
                                                                INFILCO Degremont
                                                                Cloth Media
                                                                 Aqua Aerobic
                                                                Membrane
                                                                Zenon

                                                                
                                                                
                                                             

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