sludge handling Articles

  • Sustainable sludge handling for the 21st Century

    Purification of municipal and industrial waste waters leads to the generation of a residue-called “excess sludge”. This material when mechanically dewatered is typically 75-90% water. The balance of the dewatered sludge consists of organic compounds (solid waste, biomass) and inert materials (sand, salts, and metals). These sludges have been to date dehydrated to reduce the aqueous fraction using ...


    By SCFI Group Limited

  • Sludge Reduction: Technologies Integrated in the Wastewater Handling Units

    Addition of chemical metabolic uncouplers The process of uncoupled metabolism has been studied since the ’90s for the reduction of sludge production. It can be obtained by using chemical metabolic uncouplers such as chlorinated and nitrated phenols, or 3,3’,4’,5-tetrachlorosalicylanilide (TCS). ...


    By IWA Publishing

  • Case study - Procurement and installation of a Biogas desulphurization unit at the Chania WWTP

    A proposal based on Bioconservacion’s technology was selected as the winning bid in the public tender released in 2015, covering the design, procurement and construction of a biogas desulfurizing unit to be installed in the waste water treatment plant in Chania, Greece. With a population over 100,000, Chania is the second largest municipality in the Greek island of Crete. Its waste water ...


    By Bioconservacion SA

  • Seven Ways Your Facility Isn’t Meeting Effluent Regulations and How to Solve Them

    Whether you own, operate, or help manage a municipal or industrial facility that deals with wastewater, it’s important to understand how wastewater treatment can play a significant role in the overall health of your business, especially when it comes to meeting effluent regulations. This is an important part of the wastewater treatment process to consider, as ignoring it could earn your ...


    By SAMCO Technologies, Inc.

  • Economic assessment of sludge handling and environmental impact of sludge treatment in a reed bed system

    The effect on the environment of the establishment and operation of a sludge treatment reed bed system (STRB) is quite limited compared to mechanical sludge dewatering, with its accompanying use of energy and chemicals. The assessment presented here of the investment, operation and maintenance costs of a typical STRB, and of the related environmental impact, is based on the experiences gained ...


    By IWA Publishing

  • Environmental sludge treatment

    During the process of wastewater treatment, sludge generation is an important and at times crucial issue to be addressed as inadequate sludge handling system can pose serious environmental implications. Liquid sludge can be easily thickened and reduced to a solid cake via sludge thickening / dewatering. This reduces the volume of liquid sludge significantly, usually resulting in a quite ...

  • Colloidal sludge - case study

    YEAR: 2003 COUNTRY: ITALY N° and MACHINERY MODEL EMPLOYED: 1  JETFILTER RH 1000.70 Diemme® Filtration The customer is a company that produces ceramic pastes, requiring the dewatering of ceramic barbotine, a colloidal material which is difficult to dewater. It already had a filter press that did not have the ...

  • Containment for Soil, Sediment, and Sludge

    Containment treatments are often performed to prevent, or significantly reduce, the migration of contaminants in soils or ground water. Containment is necessary whenever contaminated materials are to be buried or left in place at a site. In general, containment is performed when extensive subsurface contamination at a site precludes excavation and removal of wastes because of potential hazards, ...

  • Trends in biosolids handling technologies: economics and environmental factors

    Changes in activated sludge technology, with a much greater focus on nutrient removal instead of removal of organics, together with relatively long sludge mean that the primary sludge stream has been lost, and the sludge produced is less degradable. At the same time with the growing importance of sustainable solutions, beneficial agricultural use is being increasingly used. This changes quality ...


    By Cambi AS

  • Biosolids sampling and handling approaches for microbial analyses

     ABSTRACT The protection of human health and the environment while making the use of biosolids products more practical is a joint goal of utilities and regulatory agencies. Assuring the safety of biosolids is paramount to gaining wide public acceptance of this waste-to-beneficial use product. Making effective decisions about the safety of biosolids use relies on quality data. Satisfying ...

  • 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

  • Dredged sludge filtration - case study

    YEAR: 2009 COUNTRY: BELGIUM N° and MACHINERY MODEL EMPLOYED: 12  GHT 2000.P19 MEM Diemme® Filtration In Antwerp Harbour, lots of sediment accumulates, equal to 600,000 tons of dry material, which caused a gradual decrease in depth with the consequent reduction in navigability. Since a few years ago, the ...

  • Sludge Blanket Theory: Digging deeper

    With over 50 years of design and manufacturing experience, we are rightly proud of our British-built environmentally friendly SludgeWatch 715 Sludge Blanket Detector. Our user-friendly design is highly portable, simple to use and along with its low cost has worldwide appeal. Things have changed somewhat since our first Sludge Blanket Detector was made back in 1974. No more messy man-handling of ...


    By Partech (Electronics) Ltd.

  • 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 ...

  • Applying Rheological Techniques to Upgrade Anaerobic Digesters and Handle High Solids Concentrations

    The Orange County Sanitation District (OCSD) is implementing a Capital Improvements Program that includes upgrading their wastewater treatment Plant No. 1 in Fountain Valley, California to full secondary treatment. The expansion will increase both primary and secondary solids production. OCSD prepared a Long-Range Biosolids Management Plan that concluded the waste solids should continue to be ...

  • From theory to practice: preliminary and primary treatment residuals handling improvements

    The Upper Blackstone Water Pollution Abatement District (the “District”) treats wastewater, septage, and sludges generated in the central Massachusetts city of Worcester and surrounding communities, including a large urban area of combined sewers. This 45-million-gallon-per-day (mgd) advanced wastewater treatment facility, located near the headwaters of the Blackstone River, was constructed in ...

  • Safe Recycling of Municipal Sludge by Gamma Radiation

    Abstract Municipal sludge contains many toxic organic materials, large number of pathogenic microorganisms, heavy metals alongside many nutrients beneficial to plant and/or animal growth, but its use is limited due to these health hazards contaminants. The technology of irradiation-pasteurization has been shown to quickly, efficiently and reliably deal with potential health hazards ...


  • Common Treatment Technologies for Inorganics in Soil, Sediment, and Sludge

    The most commonly used treatment technologies for inorganics in soil, sediment, and sludge include solidification/stabilization (S/S), excavation and off-site disposal, and acid extraction. These treatment technologies are described briefly below. Solidification processes produce monolithic blocks of waste with high structural integrity. The contaminants do not necessarily interact chemically ...

  • Colchester sludge treatment works receives an upgrade

    KIRK ENVIRONMENTAL, part of KIRK GROUP, has completed the upgrade at the existing sludge treatment works in Colchester, Essex, as part of a series of special anaerobic digestion projects for Anglian Water. In 2010 Anglian Water ...

  • 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 ...

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