Multi-soil-layering (MSL) wastewater treatment systems consist of soil units (soil mixture blocks, SMB) arranged in a brick-like pattern surrounded by permeable layers of zeolite or alternating particles of homogeneous sizes that allow for a high hydraulic loading rate. This study evaluated the performances of MSL systems that have been operating
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Soil nailing is a construction technique that we use to reinforce soil to make it more stable. We use this technique for slopes, excavations, retaining walls etc. to make it more stable. In this technique, soil is reinforced with slender elements such as reinforcing bars which are called as nails. These
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You may not have realized it, but praseodymium, terbium, and gadolinium are as important to your work as the soldering iron, multimeter, and oscilloscope. Respectively, these rare earth elements (REEs) help make possible lasers and certain magnets, fluorescent lamps and sonar systems, computer memories and X-ray tubes. There are seventeen REEs, and
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Climate Change Vs. Coronavirus. Whether their state is opening up or locking down again, Americans are generally staying home more during the COVID-19 pandemic. One result has been a significant reduction in greenhouse gas emissions, which could be as much as 7 percent lower in 2020 than they were in 2019. What
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Dynamic Cone Penetrometer, or DCP, is a tool used for evaluating the strength of soils on site. It also helps with monitoring the condition of granular layers and subgrade soils in pavement sections over time. It can be used to determine the right solutions for the sites, especially when soft
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President Trump has rolled back environmental regulations, pulled the United States out of the Paris climate accord, brushed aside dire predictions about the effects of climate change, and turned the term “global warming” into a punch line rather than a prognosis. Now, after two years spent unraveling the policies of his predecessors,
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The Executive Director, China Civil Engineering Construction Corporation, Mr Jacques Liao, has given the assurance that the ongoing Lagos-Ibadan rail project, which is at 79 per cent completion, will be concluded in April next year. Liao, who made this disclosure while interacting with journalists at the corporate headquarters of the company
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The largest individual structure humanity has ever created is not a skyscraper, a pyramid or even the Great Wall of China: it’s a landfill. Fresh Kills landfill on Staten Island absorbed hundreds of millions of tonnes of New York’s rubbish in its 53-year life. The site closed in 2001, but at
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Verdant hills stretch into the distance at Hell’s Gate National Park, where zebras, buffalos, antelopes, baboons and other wildlife roam an idyllic landscape of forests, gorges and grassy volcanoes near the shores of Lake Naivasha. (more…)
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Drilling will start this week at what could become the UK's first deep geothermal electricity plant in Cornwall. (more…)
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