sludge regulations Articles

  • Standardized characterization procedures: a necessary support to regulations

    Sustainable procedures for sludge/biosolids management require the development of strategies to reduce the amount of sludge to be handled and to produce higher quality biosolids. Therefore, realistic and enforceable regulations adapted to local situations must be developed, defined outlet procedures established and good quality products guaranteed. To this end, the definition of standardized ...


    By IWA Publishing

  • BioCycle World

    Rufus Chaney Receives Lifetime Achievement Award Dr. Rufus Chaney, a Senior Research Agronomist in the Crop Systems and Global Change Laboratory of the USDA-Agricultural Research Service in Beltsville, Maryland, was awarded the Jerome Goldstein Lifetime Achievement Award at the US Composting Council’s (USCC) 2016 Conference in Jacksonville, Florida in January. The Award, created ...


    By BioCycle Magazine

  • Ultrasonic sludge disintegration in the presence of iron (II) as catalyst

    Increasing environmental awareness worldwide and subsequent regulations have led to the application of improved and novel technologies in excess sludge treatment. Sludge is the by–product of wastewater treatment plants rich in organic carbons, pathogens and metals. To enhance the ultrasonic sludge disintegration, a new method by introducing (Fe (II)) as a catalyst in the process has been ...


    By Inderscience Publishers

  • Recycling of Basic Oxygen Furnace (BOF) sludge in iron and steel works

    The recycling and utilisation of iron-bearing by-products such as dust, scale and sludge has been tried and is being practised in many iron and steel-making industries due to its associated benefits. However, the high moisture content of the Basic Oxygen Furnace (BOF) sludge (35?40%) is a major obstacle in its recycling. The management of this waste has become an important issue due to ...


    By Inderscience Publishers

  • Effect of interspecies quorum sensing on the formation of aerobic granular sludge

    Quorum sensing (QS) is a form of microbial communication that relies on small signal molecules to regulate group behaviors such as biofilm formation in response to population density. In this study, we attempted to apply the paradigm of bacterial QS to aerobic granular sludge (AGS) formation for wastewater treatment. An essential element of interspecies QS signals, boron, was added to a sequencing ...


    By IWA Publishing

  • 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 ...

  • From concept to equivalency: getting your innovative sludge disinfection process classified as A or B is now less of a mystery

    The Pathogen Equivalency Committee has updated the criteria it uses to make recommendations of equivalency on innovative or alternative sludge pathogen reduction processes. To assist new applicants through the equivalency recommendation process the pathogen equivalency committee has rolled out a new website. The Pathogen Equivalency Committee website clearly presents the ...

  • 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 ...

  • Working Document on Sludge

    Untitled Document Introduction Sewage sludge originates from the process of treatment of waste water. Due to the physical-chemical processes involved in the ...

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