Environmental Industry Articles

Air & Climate

Let’s Talk About the Design of Cartridge Dust Collectors

Let’s Talk About the Design of Cartridge Dust Collectors

When it comes to choosing a cartridge filter, the choice usually depends on the application. Systems with finer particles require a cartridge filter, and these come in the choice of two. Surface and Depth-Type Filters A surface filteris ...


Energy & Renewables

Sunbeams from Space Mirrors in dawn-dusk Polar Orbit feeding Solar fields on the ground for Low Cost Electricity

Sunbeams from Space Mirrors in dawn-dusk Polar Orbit feeding Solar fields on the ground for Low Cost Electricity

A Space Power Satellite capable of providing solar electric power economically for 24 hours per day has been a dream for decades. However, the SPS concept is very complex since it assumes multiple energy conversion steps and includes ...


Environmental Management

Questions and answers on sustainable buildings

Questions and answers on sustainable buildings

Why is this initiative necessary? Almost one half of the EU's final energy consumption and extracted materials, and about one third of water consumption, is related to the construction and occupancy of buildings. The sector also generates ...


Health & Safety

California’s Prop 65: Enforcement Trends, Reform Efforts, and the Impact on your Business

California’s Prop 65: Enforcement Trends, Reform Efforts, and the Impact on your Business

California Proposition 65 (Prop 65) is one of the most stringent state environmental laws for the chemical industry even though there is much confusion amongst Californians, whom the law was designed to protect, as to its exact scope and ...


Monitoring & Testing

Nutrient analysis system keeps wastewater plant in control case study

Nutrient analysis system keeps wastewater plant in control case study

Problem The Denver, Colo., Metro Wastewater Reclamation District wanted near real-time nutrient analysis for a very challenging headworks wastewater aeration process, consisting of a combination of centrate and RAS. The centrate and RAS ...


Soil & Groundwater

NAVFAC - Dense Non Aqueous Phase Liquid (DNAPL) Removal from Fractured Rock Using Thermal Conductive Heating (TCH) - Case Study

NAVFAC - Dense Non Aqueous Phase Liquid (DNAPL) Removal from Fractured Rock Using Thermal Conductive Heating (TCH) -  Case Study

The removal of Dense, Non-Aqueous Phase Liquids (DNAPLs) and associated dissolved phase compounds is challenging in fractured rock given permeability, matrix diffusion, and fracture connectivity issues. Modeling, laboratory treatability ...


Waste & Recycling

Break It Down, Build It Up - Sustainable Science Has Roots in ASTM Standards Development

Break It Down, Build It Up - Sustainable Science Has Roots in ASTM Standards Development

It was back in the 1980s,” Richard Wool, Ph.D., recalls. “A lot of waste management sites were running out of space. Barges full of garbage were plowing up and down the East Coast with no place to dock. The idea of having ...


Water & Wastewater

Caustic Recovery Using Membrane Filtration

Caustic Recovery Using Membrane Filtration

Abstract Food and beverage processors that use dilute caustic solutions for cleaning process equipment have shown increased interest in recovering the used caustic. The primary reason is that the price of caustic has increased ...


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