Wastewater Features

  1. Design And Care Of Reverse Osmosis Systems, Part 2: Upstream Equipment
    1/14/2019

    The success of a new reverse osmosis (RO) membrane system is often directly related to its pretreatment. The previous section of this article discussed RO design issues and introduced how a pilot study should include a study of its probable pretreatment equipment since the pretreatment performance will directly affect the performance of the RO system. However, piloting the upstream processes can be challenging in sizing these components for the pilot RO unit’s low flow rate.

  2. The Role Of IoT And Control Technologies In Water Filtration Systems
    1/10/2019

    With time, labor, and money at a premium, state-of-the-art controls on filtration equipment can ease the burden on operators while improving uptime and lowering costs.

  3. Precision And Accuracy Of Multiple Stormwater Laboratory Testing Methodologies
    1/10/2019

    There are several accepted methodologies for testing stormwater treatment devices in the lab, but what works best? A comparison study gets us closer to the goal of optimal sediment removal efficiency.

  4. Drones Flying Below Your Feet
    1/10/2019

    These robots aren’t taking jobs — they’re simply making the job of utility workers safer and easier.

  5. EPA-New Mexico Wastewater Report Is A Conversation Starter, Not The Final Word
    1/4/2019

    When it comes to answering questions about whether the oil and gas industry’s wastewater can be safely reused for other purposes, like food crops, livestock, or even drinking water, there are a number of other serious factors to be considered.

  6. The Next Turn For 'Waters of the United States'
    1/2/2019

    After the Supreme Court, in its 2006 Rapanos v. United States decision, admonished the U.S. EPA and Army Corps of Engineers to once and for all come up with an acceptable definition of “waters of the United States,” which is the linchpin for all regulation under the Clean Water Act, the agencies, nine years later, finalized regulations redefining that term in their 2015 Rule. 

  7. Understanding And Coping With Struvite/Vivianite Formation In WWTPs
    12/21/2018

    Based on wastewater properties, various types of mineral buildup can affect wastewater treatment plant (WWTP) piping. With their impacts on plant energy efficiency and potential restriction of throughput capacity, keeping pipes free-flowing is an important aspect of WWTP operations. Here’s guidance for coping with two common problems associated with phosphorus concentrations in wastewater — struvite and vivianite.

  8. Design And Care Of Reverse Osmosis Systems, Part 1: Design
    12/20/2018

    Reverse osmosis (RO) systems offer power plant owners and operators a reliable and well-proven water treatment solution. However, designing and caring for an RO system requires a thorough understanding of a plant’s water supply and the technology’s capabilities. Part one of this series will review the importance of water samples and pilot studies as plant engineers begin to design an RO system to match their needs.

  9. How To Develop The Best Construction Dewatering Solutions
    12/12/2018

    Basic construction activities today are more complex than ever when it comes to environmental concerns. Dewatering is a common necessity for contractors and developers today. In addition to ensuring a safe construction site, contractors must be aware of groundwater disposal constraints and regulations.

  10. EPA Uses Floating Vegetated Islands To Remove Excess Nutrients From Water
    12/4/2018

    Harmful algal blooms — the overgrowth of algae in water — are a major problem across the nation. Blooms occur when excess nutrients (nitrogen and phosphorus), combine with sunlight, and warm temperatures in water bodies. They can cause severe, negative impacts on aquatic ecosystems, the economy, and human health.