Featured Articles

  1. Hach Company Is Giving Away A Real-Time Control Sludge System At WEFTEC 2013
    10/3/2013

    Hach Company is searching for one U.S. wastewater facility to partner with and give a complete Real-Time Control Sludge Thickening System (RTC-ST) at WEFTEC 2013. The system will include all parts and services and has an estimated value of more than $36,000. Applicants should visit the Hach Booth, #1425, during WEFTEC and speak with a representative to learn how to qualify.

  2. BioTector Awarded Prestigious Product Leadership Award In Water Analysis
    10/24/2012

    BioTector Analytical Systems, LTD (BioTector) is honored to win the prestigious Frost & Sullivan 2012 United States Product Leadership Award in Water & Wastewater Analytical Instrumentation Market.

  3. Dissolved Oxygen Measurement In A Wastewater Treatment Plant
    3/3/2015

    Breakdown of organic wastes entering a wastewater treatment plant is accomplished by using a biomass or blend of beneficial microscopic organisms, bacteria, and solids. This converts the non-settleable solids (dissolved and colloidal matter) into settleable solids, carbon dioxide, water, and energy.

  4. pH Control Systems
    7/16/2013

    Different types of applications require different pH control systems. This technical bulletin describes six basic types of pH control systems and outlines the operating principles of each.

  5. Cost Effective Sour Water Stripping
    7/16/2013

    Refineries are challenged to properly reuse or dispose of sour water by removing ammonia (NH3) and hydrogen sulfide (H2S) from water through a process called stripping.

  6. Aerated Biological Nitrogen Removal
    7/16/2013

    Excess ammonia in receiving waters causes algal blooms that decrease oxygen levels. For this reason, many wastewater treatment plants (WWTPs) must limit ammonia in discharge. Mike Rousey, Hach Company

  7. On-Line Phosphorous Measurement Takes The Guesswork Out Of Alum Treatment
    7/16/2013

    Phosphorous promotes eutrophication in surface waters and helps create conditions for algal blooming and oxygen depletion. Some phosphorous removal can occur naturally in a conventional biological wastewater treatment facility, but the result is not reliably compliant with increasingly strict limits on permissible phosphate levels in effluent discharged to receiving streams, ponds and lakes. By Bob Dabkowski, Hach Company

  8. Total Kjeldahl Nitrogen: Simplified With s-TKN™
    7/15/2013

    The Dallas County Water and Sewer Authority (DCWSA) in Selma, Alabama recently found itself in a tough spot: under the scrutiny of the Alabama Department of Environmental Management (ADEM). The wastewater treatment system needed better means for control. Ammonia, TSS, cBOD, and TKN readings were out of compliance. Then they discovered a new testing method known as simplified-TKN (s-TKN), and with it, better process control to achieve regulatory compliance. By Andrew Antonio, Municipal Wastewater Market Manager and Derek Walker, Applications Development Manager