Environmental Industry Articles

Air & Climate

Air Rule for Cement Kilns Requires 92 Percent Cut in Mercury Emissions

Air Rule for Cement Kilns Requires 92 Percent Cut in Mercury Emissions

Portland cement kilns will be required to reduce emissions of mercury by 92 percent as part of an Environmental Protection Agency final rule announced Aug. 9 that imposes controls for several toxic pollutants. Although most of the ...


Energy & Renewables

CSP faces new California siting limits in DRECP

CSP faces new California siting limits in DRECP

The publication of the Preferred Alternative draft of the much-awaited Desert Renewable Energy and Conservation Plan (DRECP) brings both hope and consternation to supporters of clean energy in California. DRECP would close approximately ...


Environmental Management

The Sustainability Maturity Curve

The Sustainability Maturity Curve

For businesses, sustainability is not a destination, but a continuous journey. To help companies and managers to understand the topic and why they should be interested in it, PE International uses the concept of the sustainability maturity ...


Health & Safety

Three Steps to Removing Cognitive Bias from Safety Decisions

Three Steps to Removing Cognitive Bias from Safety Decisions

Why do good leaders sometimes make bad decisions? The answer has to do with the remarkably complex human brain. Every day, the typical person makes somewhere between 2,000 and 10,000 decisions. Unable to cope with all the detail of each ...


Monitoring & Testing

What’s the difference between free and total chlorine?

What’s the difference between free and total chlorine?

The element Chlorine exists as a gas Cl2, when this is mixed with water it forms hypochlorous acid (HOCl) which is the disinfecting agent; Cl2 + H2O HCl + HOCl This HOCl can partly disassociate to form the hypochlorite ion OCl-; HOCl H+ ...


Soil & Groundwater

Hunters Point Case Study (In Situ Gas Thermal Remediation (GTR™))

Hunters Point Case Study (In Situ Gas Thermal Remediation (GTR™))

In Situ Thermal Remediation with Gas Thermal Remediation (GTR©) is being used to remove NAPL contaminants from a former military base. The system is extracting 378 liters (100 gallons) of liquid waste every week. LNAPLs, such as fuel ...


Waste & Recycling

Garden Street Iron & Metal Processes 8,000 Tons of Scrap Each Month Using Variety of Eriez Recycling Equipment

Garden Street Iron & Metal Processes 8,000 Tons of Scrap Each Month Using Variety of Eriez Recycling Equipment

Problem: Garden Street Iron & Metal recycling complex, located just west of downtown Cincinnati, OH, has been owned and operated by the Weber family for more than five decades. The complex, set on 22 acres with three nearby rail spurs ...


Water & Wastewater

From Wastewater Treatment to Sweet Pineapples

From Wastewater Treatment to Sweet Pineapples

In wastewater treatment, ammonia that is removed from sewage used to be discharged directly to the atmosphere. Nowadays, studies have identified that ammonia emissions are of major concern to air quality. This has led to a new way of ...


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