sludge heat exchanger Articles

  • Vivianite Heat Exchanger removal trial case study

    On the vivianite-laden heat exchangers, the maintenance supervisor created a recirculation circuit and diluted JS 9325 to a fifty percent (50%) solution. They recirculated the diluted solution for 48 hours while raising the temperature of the solution to 110F. Upon opening the first heat exchanger, they observed a purple solution following by a half-inch (½”) sheet of vivianite ...


    By Struvite Removal

  • Struvite Removal & Vivianite Removal Case Study- Heat Exchanger and Screw Press

    A regional wastewater treatment plant in Sonoma County was experiencing problems with struvite on their screw presses and vivianite on their heat exchangers.The plant maintenance staff was forced to shut down the dewatering process every three (3) weeks to clean because of struvite deposits on the screen of the screw press. They also noticed that they were having a difficult time maintaining ...


    By Struvite Removal

  • Steam injection heating of Waterwater, Sludge & BioSolids, & High Viscosity Fluids

    A number of unique challenges emerge in the heating of agricultural, municipal, and food waste streams in anaerobic digestion process and biogas production. Heating devices are subject to variable size particulate, fibrous materials, wear, temperature, flows, and fluid characteristics that can make it extremely difficult to achieve and maintain optimal performance and efficiencies of heating ...


    By ProSonix

  • Heat Pump Used to Drain Contaminated Sludge in a Steel Factory

    Summary In 1987, new regulations required that factories dispose of their contaminated water and waste themselves. Making galvanised steel wire, the Stelfil factory produces sludge contaminated with lead and zinc. Stelfil spent thousands of dollars to bury this waste and evaluated three systems to remove most of the water: a gas dryer, an induction heated screw conveyor and a heat pump system. ...


  • Heat recovery from wastewater

    Heat recovery from gray water is particularly important in water-intensive industries such as pulp and paper plants, dairies and breweries. Rather than flushing used water down the drain, consider whether a heat exchanging system can help you put that energy to work in your process again. Most plant operators arc aware of the need to save money and reduce the environmental impact of their plant ...


    By DDI Heat Exchangers Inc.

  • Data Requirements for Soil, Sediment, and Sludge

    Site soil conditions frequently limit the selection of a treatment process. Process-limiting characteristics such as pH or moisture content may sometimes be adjusted. In other cases, a treatment technology may be eliminated based upon the soil classification (e.g., particle-size distribution) or other soil characteristics. Soils are inherently variable in their physical and chemical ...

  • Using biogas for combined heat and power

    An integral part of the majority of anaerobic digestion facilities across the world is the CHP combined heat and power (CHP) engine. For the first time builder of a biogas plant, it is often neglected as the focus is on reducing the capital costs ...


    By Clarke Energy

  • Using biogas for combined heat and power

    An integral part of the majority of anaerobic digestion facilities across the world is the CHP combined heat and power (CHP) engine. For the first time builder of a biogas plant, it is often neglected as the focus is on reducing the capital costs ...


    By Clarke Energy

  • Class a biosolids production at eastern municipal water district using heat pasteurization

    Since 1998, the Eastern Municipal Water District (District) has developed and successfully operated a heat pasteurization facility to treat extended aeration waste activated sludge (WAS) from the Perris Valley Regional Water Reclamation Facility (PVRWRF). The treatment train uses hot water to sludge spiral heat exchangers and a patented continuous-feed, complete mix pasteurization vessel (heated ...


  • VacuDry Indirect heated vacuum thermal Desorption by econ industries - case study

    With the VacuDry8 technology the energy-efficient treatment of hazardous and industrial waste as well as contaminated soil, oil sludge and secondary raw material is realized. Controlled vacuum and heat are used to separate minerals from oil, solvents, mercury and other hazardous substances.    At the core of the econ VacuDry8 process is a specially designed dryer chamber which ...


    By econ industries GmbH

  • Commissioning and re-design of a ”class a” thermal hydrolysis facility for pre-treatment of primary and secondary sludge prior to anaerobic digestion

    ABSTRACT Thermal hydrolysis of sewage sludge as a pretreatment technique for producing a “Class A” sludge, with existing (or new) mesophilic anaerobic digestion systems are presently being considered for wastewater treatment plants in the USA and Canada. In Europe, a number of innovative hydrolysis systems have been installed or are planned. One technology sold under the trade name CAMBITM has ...


    By Cambi AS

  • Mogden thames water case study

    Plant inputs : 90,000 Tonnes dry solids/annum 5,466m3 combined sludges/day Primary sludge 60% Secondary sludge 40% Digestion plant : 16 x 4,250m3 Mesophilic digesters (68,000m3 loial capacily) Complete refurbishment technology package 16 New Monsal digester heat exchanger systems 16 New Monsal SGM digester mixing systems Complete upgrade • biogas management system ...


  • Control Problems Waste Feeds in Fluid Beds (PDF - File size 71K)

    High concentrations of alkali salts, iron, and phosphorus in sludge can cause operating problems in fluid-bed incinerators. Understand how clinker and scale form, and how to prevent difficulties. A major advantage of a high-temperature fluid bed (HTFB) is its ability to accept unsteady feed. Because a large quantity of heat is stored in the granular bed material, fluctuations in feed rate, ...

  • Olive mill waste water treatment

    The production of olive oil generates two kind of waste waters: RINSING WATERS: the quantity is subject to change. It can be re-circulated, after the settling to remove the solids, or discharged directly. SLUDGE: vegetation water with additional water, whose quantity is subject to change. In case of traditional oil mills, the hot additional water flows to the inlet of the centrifuge. Part ...

  • Magstream-p - case studies

    HDL Magnetic scale preventers enhance quality and cut costs at jaguar Installed HDL unit in phosphate spray pipework in Dec 1988 Before     2x 2000 gals tankers removed sludge every six weeks Now     One tanker every 12 weeks is more than enough Before     Jets blocked Now     jets stay clean ...

  • Optimization for extracellular polymeric substances extraction of microbial aggregates

    The extracellular polymeric substances (EPS) are important macromolecular components in microbial aggregates. The three EPS extraction methods – ultrasound + cation exchange resins (CER) + sulfide, ultrasound + formamide + NaOH, and ultrasound + heat – were investigated in the study, and the component differences of extracted EPS from the loose ...


    By IWA Publishing

  • Electronic Water Treatment Provides a Clean Line for Food and Drink Production

    The USA’s food and drink producers spend billions of dollar’s each year in downtime, increased energy bills and the early renewal of capital equipment caused by hard water limescale blocking lines and leaving calcium carbonate deposits on water fed equipment.  Scale and sludge formation are the result of the precipitation of compounds that are ...

  • Two-phase anaerobic digestion for class a biosolids at moccasin bend WWTP

    The Moccasin Bend Wastewater Treatment Plant (WWTP) provides treatment for the City of Chattanooga, Tennessee and the surrounding region. The City has completed upgrades to the solids handling facilities to treat and dewater the primary solids and waste activated sludge (WAS) from the WWTP. This paper summarizes the process to handle the primary solids and the start-up process. Primary solids ...

  • How to tap the energy savings in greywater

    Many operators of offices, hospitals, hotels, large condos, and other buildings are aware of the need to save money and reduce their environmental impact, through better water management. The result has been the growth of ways to reduce water consumption, ranging from low-flow show-crheads to landscaping that requires minimal watering. Building operators are also aware of a similar need to ...


    By DDI Heat Exchangers Inc.

  • Replacement of a Multiple Hearth by a Fluid Bed Incinerator - The Greensboro Experience (PDF - File size 50K)

    ABSTRACT The incinerator at the T.Z. Osborne Plant in Greensboro, North Carolina burns sludge from its own Waste Water Treatment Plant and sludge pumped from the nearby North Buffalo plant. The two plants have a combined capacity of 36 million gallons per day of wastewater. In 1992, the Osborne plant concluded a study evaluating its options for future municipal sewage sludge disposal. The ...

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