biosolids drying Articles

  • Biosolids- Considering the Types, Applications and Biosolids Drying Methods

    While some water treatment plants are meant to simply make the sludge safe enough to dispose of, most facilities continue to treat the sludge so that the material can be put to good use in their communities. Once sludge is treated and processed to meet EPA safety standards for productive use, the resulting nutrient-rich organic material is termed as biosolids. ...


    By IWA Publishing

  • Biosolids Heat Drying: Safety in Design and Owner Operation

    ABSTRACTInterest continues to grow in heat drying as a means of processing biosolids into an aesthetically pleasing product form with multiple use opportunities, while also achieving a significant reduction in both volume and weight of biosolids for off-site hauling. As the number of heat drying installations increase, so too do reports of safety incidents—an indication that Owners and facility ...

  • Pyrobustor for the thermal treatment of biosolids

    ARA Pustertal AG operates the Tobler wastewater treatment plant in South Tyrol, Italy. The Tobler ARA facility is the fi rst and only water treatment plant in Central Europe that is housed in an underground cavern. The impressive cavern plant, whose tunnels are twice as large as that of a highway tunnel, began operation in July, 1996. The inclusion of a sludge drying plant and a thermal sludge ...


    By Eisenmann

  • Small-Scale Biosolids Composting

    Cambridge, Ohio retrofitted a portion of its vacuum assisted drying beds into a covered composting facility, processing about 300 dry tons/year of biosolids and wood chips. Like many small communities in an agricultural area, the City of Cambridge, Ohio (pop. 14,000) managed biosolids generated by its 2.25 mgd Water Pollution Control Center (WPCC) via land application on farm fields. “Then ...


    By BioCycle Magazine

  • 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

  • An Advanced Biosolids Treatment Process and Potential Beneficial Applications of the Processed Biosolids

    ABSTRACTAn innovative and cost-effective biosolids treatment and processing technology was developed and demonstrated at a pilot and full-scale at the Guelph Wastewater Treatment Plant in Ontario. The Lystek process involves a low but optimized application of heat, alkali, and mixing in a batch or semi-continuous system to achieve the desired physical, chemical and microbiological characteristics ...

  • Biosolids Composter Satisfies Customers and Neighbors

    A ticket to Penn State football games isn’t the only hard thing to come by in State College, Pennsylvania. So is the biosolids compost produced by State College’s University Area Joint Authority (UAJA) wastewater treatment plant. “For the last four years, we’ve been sold out before we’ve made the compost,” says Stephen Welch, who manages the UAJA composting plant. All biosolids generated — about ...


    By BioCycle Magazine

  • MSW and Biosolids Become Feedstocks for Ethanol

    The first commercial facility designed to recover recyclables from municipal solid waste, and utilize the residuals with biosolids as feedstock for ethanol production, is moving forward in Middletown, New York. The Orange Recycling and Ethanol Production Facility, to be built on a 22-acre site adjacent to the Middletown Wastewater Treatment Plant, has capacity to process approximately 230,000 ...


    By BioCycle Magazine

  • Waste Water Treatment Plant sees Economic and Environmental Return on Investment with Biosolids Drying System from Therma-Flite

    Therma-Flite, a resource recovery technology company, releases a new case study that provides municipalities with a look at how one mid-sized city has achieved its goals of eliminating transportation and landfill costs associated with biosolid waste disposal. Regulatory, economic and environmental pressures prompted the plant operations leader to seek equipment and systems that could transform ...


    By Therma-Flite Inc.

  • Microbial safety of air-dried and rewetted biosolids

    To assess microbial safety of treated sewage sludge (biosolids), we examined the inactivation of microbial indicators for potential bacterial, viral and protozoan pathogens. The levels of indicators were determined throughout the air-drying and storage phases of anaerobically digested sewage sludge. Samples were collected from two wastewater treatment plants (WWTPs) in Victoria, Australia. ...


    By IWA Publishing

  • 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 ...


  • Influence of water treatment residuals on dewaterability of wastewater biosolids

    Co-dewatering of water treatment residuals (WTR) and wastewater biosolids can potentially benefit municipalities by reducing processing equipment and costs. This study investigated dewaterability (using capillary suction time, CST) of combined alum residuals (Al-WTR) and anaerobically digested biosolids at various blending ratios (BR), defined as the mass ratio of WTR to biosolids on a dry ...


    By IWA Publishing

  • Fate of biosolids trace metals in a dryland wheat agroecosystem

    Biosolids land application for beneficial reuse applies varying amounts of trace metals to soils. Measuring plant-available or total soil metals is typically performed to ensure environmental protection, but these techniques do not quantify which soil phases play important roles in terms of metal release or attenuation. This study assessed the distribution of Cd, Cr, Cu, Mo, Ni, Pb, and Zn ...

  • Toxicity and bioaccumulation of biosolids‐borne triclosan in food crops

    Triclosan (TCS) is an antimicrobial compound commonly found in biosolids. Thus, plants grown in biosolids‐amended soil may be exposed to TCS. The authors evaluated the plant toxicity and accumulation potential of biosolids‐borne TCS in two vegetables (lettuce and radish) and a pasture grass (bahia grass). Vegetables were grown in growth chambers and grass in a greenhouse. Biosolids‐amended soil ...


    By John Wiley & Sons, Ltd.

  • Controlling Dust and Bioaerosols at a Biosolids Composting Faclity

    Studies at enclosed Longmont, Colorado project evaluate exposure level of employees. Operational changes reduce dust, endotoxin and A. Fumigatus by 90 percent. WHEN dealing with public health issues and composting, attention has been predominantly focused on potential exposure from the release of Aspergillus fumigatus (A. fumigatus) from composting facilities. Numerous studies were conducted to ...


  • 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

  • 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

  • Planned Biosolids Facility Forms Nucleas for Eco-Complex

    ABSTRACTCatawba County owns and operates the Blackburn Landfill, a sanitary landfill for the disposal of municipal solid waste (MSW). Methane generated within the landfill is collected and utilized to generate electricity which is sold to Duke Power. In the process of combusting methane to generate electricity a significant amount of heat energy is produced, which is not currently utilized. ...

  • Stability measurement of Biosolids Compost by Aerobic Respirometry

    Oxygen uptake of biosolids compost was measured during both laboratory and full-scale studies. Aerobic respirometry of solid samples of compost provided a precise measure of microbial activity. There was a noticeable decreasing trend in oxygen consumption over 25 days of composting, thereby indicating increasing stability. Moisture content also was found to affect the compost stability. During ...


    By Challenge Technology

  • 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 ...


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