flow thickener Articles

  • Paste thickener bed level measurement

    Numerous studies and papers have been devoted to the subject of thickener design and operation to achieve specified throughput and discharge densities. Mathematical models have been developed that present methods for sizing thickeners and predicting performance under varying process conditions. The compression effect of deeper beds on dewatering performance is a recognized phenomenon. This is one ...


    By WesTech Engineering, Inc.

  • Case study - Sludge digestion/thickening optimizes treatment

    Overview: Big Park Domestic Wastewater Improvements District in Arizona had constructed a new 500,000 gallons per day biological wastewater treatment system in 1997. As time passed, the aging plant was unable to keep up with increasing demands. Challenge: In 2012, the District started working with Sunrise ...

  • High Rate Treatment of CSO/SSO Flows Using a High Density Solids Contact Clarifier/Thickener - Results from a Pilot Study

    ABSTRACT A two-month pilot study was conducted at the Village Creek Wastewater Treatment Plant in Birmingham, Alabama to test the technical feasibility of utilizing a ...

  • Pressure-loss computation procedures for non-Newtonian pipe flow

    Wastewater sludge with solids concentrations above about 2 percent exhibit non-Newtonian behavior, i.e., the sludge apparent viscosity changes with the shear rate (flow velocity). To determine pipeline head loss for sludge streams to and from anaerobic digesters, samples of primary, secondary and digested sludge were collected from Orange County Sanitation District Plant No. 1 and analyzed to ...

  • Mine backfill

    Mine backfill is defined as the material used to fill the cavities (i.e., stopes) created by underground mining. Backfilling can be a means to dispose of sludge and/ or tailings which may contain hazardous materials and to reduce surface environmental impacts by storing tailings underground. Alternately, backfilling with nonhazardous materials can allow for mining productivity improvements. To ...


    By WesTech Engineering, Inc.

  • The laminar/turbulent transition in a sludge pipeline

    Globally, wastewater treatment plants are under pressure to handle high concentration sludge in a sludge treatment line. Unawareness of the non-Newtonian behaviour of the thickened sludge has the potential to cause unexpected problems when the fluid behaviour changes from turbulent to laminar flow. In this study, sludge apparent viscosity was plotted as a function of total suspended solids ...


    By IWA Publishing

  • Bed Level Measurement

    Numerous studies and papers have been devoted to the subject of thickener design and operation to achieve specified throughput and discharge densities. Mathematical models have been developed that present methods for sizing thickeners and predicting performance under varying process conditions. The compression effect of deeper beds on dewatering performance is a recognized phenomenon. This is one ...


    By WesTech Engineering, Inc.

  • Tailings paste disposal – more than water recovery

    The minerals industry has faced increasing pressures in recent years in the management of tailings streams. Environmental, economic and other factors have led many minerals producers to explore the technology of making and using “paste.” With the increasing number of installations worldwide, this technology has proved to not only be industry accepted, but economically advantageous. ...


    By WesTech Engineering, Inc.

  • Newport WWTP Newport, WA

    In 2003 the city of Newport began a study of upgrading the city’s waste water treatment plant. Plant flows were increasing and the city wanted to process sewage from septage haulers handling recreational development in the area. Esvelt Environmental Engineering Company was selected to do the study and facility design. One of the first decisions made was rather than expand aeration basins, ...


    By BDP Industries

  • BCTMP Mill effluent treatment plant

    Location: Slave Lake, Alberta Owner: Slave Lake Pulp Corporation Description: A greenfield 130,000 ADMT BCTMP mill using Aspen as wood furnish. The high strength effluent, with a BOD5 strength of up to 6,000 mg/L (35 t/d) and flow of 6,300 m3/d, is treated by a five day extended aeration activated sludge process. This represented the first ...


    By NovaTec Consultants Inc.

  • Acid mine drainage treatment

    Acid mine/rock drainage is a rampant problem in the world today. The above photo depicts acid drainage at an abandoned mine in the Yukon Territory of northwest Canada. This mine shares a similar history to thousands of other mines throughout the world. It was in operation for six short years in the 1950’s, producing gold ore. Its profitability eventually failed and it was abandoned. In the ...


    By WesTech Engineering, Inc.

  • Peach Processing Wastewater Treatment

    A major fresh pack operation of peaches and nectarines needed a screening system to remove the labels and peach fuzz from their wash water before it was pumped from the pond for irrigation use. Flow to the pond is a steady flow of 50 gpm, rising to 600 gpm during periodic draining of the peach coolers and washing systems. The water is a combination of wash water, labels and fuzz from the fruit, ...


    By Integrated Engineers Inc.

  • Lab-scaled digestibility study of wastewater sludge treated by thermal hydrolysis

    ABSTRACT High-solids mesophilic anaerobic digestion (HS-MAD) processes employing thermal hydrolytic pretreatment (THP) have gained much interest in recent years; primarily because they have been shown to produce Class A biosolids in accordance with EPA 503 regulations, but also because they represent an economical approach to the maximization of available anaerobic digester volume. The ...


    By Cambi AS

  • Texas Housing Development

    Burdened with a failing packaged extended aeration system, the Brookeland Freshwater Supply District near Jasper, Texas could not meet the State of Texas effluent discharge requirements. The existing plant also requiredextensive service and maintenance to keep the outdated equipment operational. Left with no other choice, the plant needed to be replaced. The Water District evaluated several ...


    By Fluidyne Corporation

  • Hoosac WQD Williamstown, MA

    An aging primary and secondary treatment facility coupled with increased loadings to the co-settling primary clarifier resulted in the need to upgrade the Hoosac WQD. An important component of the upgrade was biosolids handling. Tighe & Bond selected the belt filter press as the bases of design for this 5.37 MGD average daily flow facility. The co-settled primary and secondary sludge is ...


    By BDP Industries

  • Mononov specified for europe’s largest storm overflow

    Through its Spanish distributor, Albosa, Mono has supplied 32 stormscreens and 46 progressing cavity pumps to the UMAC Wastewater Treatment plant, which was designed to handle a maximum flow of 129,600m3 per day. These high performance stormscreens, which offer an alternative to conventional mesh and powered screens for handling storm overflows, have been installed to ensure that no contaminated ...

  • Biofilm Growth-Percolation Models and Channeling in Biofilter Clogging

    Biomass accumulation is a load-limiting factor in the operation of biofilters used for air pollution control. As the biofilm thickens, portions at the base are no longer exposed to contaminants and oxygen and, thus, provide no treatment. Smaller pores are filled with biomass so that air no longer flows into them. As airflow paths are restricted, air may be prevented from reaching some pores even ...

  • Addressing digester foaming by fixing activated sludge system and gaining capacity in both

    The City of Richland Wastewater Treatment Facility digesters have experienced Nocardiainduced digester foaming problems from the time they went into operation in 1985. Because of the persistent foam, most or all of the thickened waste activated sludge (TWAS) was often not sent to the digesters but directly to the belt filter press to be dewatered separately from the digested sludge. It was ...

  • The great white north : Cultus Country WWTP British Columbia, Canada

    Due to the growing tourism industry in British Columbia, Cultus Country Resort, located just 60 miles east of Vancouver, is in need of wastewater treatment.  For water systems and utilities company Corix, an opportunity to build and operate a wastewater treatment plant in their native Canada was too good to turn down.  Corix has extensive experience in the water treatment industry and ...

  • New Biological Phosphorus Removal Concept Successfully Apllied in a T-Ditch Process Wastewater Treatment Plant

    ABSTRACTLuofang Wastewater Treatment Plant adopted a new concept of enhanced biological phosphorus removal in combination with a traditional Triple Ditch (T-Ditch) process to optimize the efficiency of biological phosphorus removal. The new concept included the addition of a thickener and anaerobic cell ahead of the T-Ditch system. Recorded data shows that the modified system is operating ...

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