package commercial wwtp Articles

  • Modeling Fixed Film Processes: Practical Considerations and Current Limitations from a Consulting Viewpoint

    ABSTRACT Fixed film technologies such as integrated fixed film activated sludge (IFAS), moving bed bioreactors (MBBR), biological aerated filters (BAF) and denitrification filters are gaining popularity in the United States for a number of reasons. As a result, there is a renewed desire to model these processes, particularly for consulting engineers interested in designing these processes. ...

  • Reduced Sludge Production in BNR Systems: Reality or Myth?

    This paper compares the performance of a pilot Modified Ludzack Ettinger (MLE) process treating degritted municipal wastewater, with full-scale activated sludge plants at two towns in Southern Ontario, namely Listowel and St. Marys. At Listowel, the MLE process achieved superior effluent quality compared to the full-scale extended aeration system at a total bioreactor HRT of 20 hours versus 48 ...

  • Microturbines, Gas Engines Link Biogas to the Grid

    OPPORTUNITIES to produce electricity from methane are being improved continuously as manufacturers introduce new and upgraded equipment to address market needs and varying characteristics of raw biogas. In the renewable energy from organics recycling arena, the two primary types of electricity generation equipment are microturbines and reciprocating gas engines. This article provides a brief ...


    By BioCycle Magazine

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