epa 503 regulation Articles

  • Biosolids Applied to Land: Advancing Standards and Practices

    Summary Wastewater treatment in the United States is a major cornerstone of efforts to keep the nation’s waters clean. Sewage sludge is the solid, semisolid, or liquid residue generated during treatment of domestic sewage. Since the early 1970s, the U.S. Environmental Protection Agency (EPA) and the wastewater treatment industry have promoted recycling of sewage sludge. With the prohibition of ...


  • Modeling the carbon footprint of various biosolids treatment options

    There are a wide variety of processes which are capable of treating biosolids to comply with the pathogen reduction requirements defined by US EPA 503 regulations. Choice of technology is complex and dependent on a number of project specific and economic influences. However, within Europe, long term sustainability and carbon impact are becoming more influential and this is being backed up by ...


    By Cambi AS

  • 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 ...

  • National Biosolids Overview

    In all, the 1990s have been good for the biosolids recycling community. Greater quantities of biosolids are being beneficially used than ever before, there are national biosolids regulations that are widely accepted as a good baseline, and there is an extensive, accessible network of researchers, practitioners, advisers and public officials who when combined, provide thousands of years worth of ...


    By BioCycle Magazine

  • 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

  • Advances in Thermophilic Anaerobic Digestion

    ABSTRACTSignificant advances have been made in the knowledge base and practical options for improving thermophilic anaerobic digestion over the past 10 to 15 years. Today, more options exist that promise to enhance the degree of stabilization achieved and finished product quality in new and retrofitted existing processes. In parallel, the body of knowledge regarding pathogen inactivation in these ...

  • Biocycle Nationwide Survey: The State of Biosolids in America

     The State of Biosolids in America TAKING the pulse of biosolids management practices in the United States yields a combination of hard data and valuable insights. Between survey responses and telephone conversations, state biosolids coordinators around the country paint an overall picture of progress with the beneficial use of biosolids, along with a dose of reality about political, ...


    By BioCycle Magazine

  • 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 ...

  • 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

  • Factors Affecting Disinfection and Stabilization of Sewage Sludge

    ABSTRACTEffective disinfection and stabilization of sewage sludge prior to land application is essential to not only protect human health, but also to convince the public of its benefits and safety. A basic understanding of the key factors involved in producing a stable biosolid product is a necessary component to ensuring that effective disinfection and stabilization are achieved. Key stressors ...

  • Pathogen Inactivation by a Closed Alakaline System

    ABSTRACTThe efficiency of advanced alkaline disinfection in closed systems has been demonstrated to depend on the balance of ammonia concentration, pH, exposure time, temperature, total solids content, post-treatment storage time and mixing effectiveness. When the alkaline system is a closed one, an additional pathogen stressor is added: pressure. The effect of the alkaline dosing has been ...

  • Simple Separation: Diverting Wood And Cardboard at Construction Sites

    Diverting Wood And Cardboard At Construction Sites Residential home construction in Wisconsin generates 128,000 tons of residuals annually, according to a 1998 study by Camp, Dresser & McKee. Ten builders are participating in a project to demonstrate how easily major components of this waste stream can be recycled. The Metropolitan Builders Association (MBA) of Greater Milwaukee, the ...


    By BioCycle Magazine

  • Educate, Educate, Educate : Why Colorado Farmers Want New York City Biosolids

     Diverting Wood And Cardboard At Construction Sites Residential home construction in Wisconsin generates 128,000 tons of residuals annually, according to a 1998 study by Camp, Dresser & McKee. Ten builders are participating in a project to demonstrate how easily major components of this waste stream can be recycled. The Metropolitan Builders Association (MBA) of Greater Milwaukee, the ...


    By BioCycle Magazine

  • RAISING THE BIOSOLIDS BAR: DEVELOPING AN ENVIRONMENTAL MANAGEMENT SYSTEM

    A California sanitation district’s journey through the process of establishing an EMS for biosolids provides valuable insights, especially for agencies battling public acceptance challenges. THE Orange County, California Sanitation District (District) provides wastewater treatment service for more than 2.2 million people. The facility treats approximately 250 million gallons/day of wastewater and ...


  • The Safety of Genetically Modified Foods Produced through Biotechnology

    Executive Summary The Society of Toxicology (SOT) is committed to protecting and enhancing human, animal, and environmental health through the sound application of the fundamental principles of the science of toxicology. It is with this goal in mind that the SOT defines here its current consensus position on the safety of foods produced through biotechnology ...


    By Oxford University Press

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