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A string trimmer, also known by the portmanteau strimmer and the trademarks Weedwacker, Weed Eater and Whipper Snipper, [1] [a] is a garden power tool for cutting grass, small weeds, and groundcover. It uses a whirling monofilament line instead of a blade, which protrudes from a rotating spindle at the end of a long shaft topped by a gasoline ...
Water to be filtered is then applied to the filter surface until the filter clogs and the backwash cycle needs to be repeated. [3]: 264–8 [4]: 10.53–10.58 [5]: 937–9 [6]: 8.11–8.18 [7]: 353–6 Some water treatment filters use surface wash systems that break up the heavily clogged, granular media surface layer.
The use of deep bed sand filters as the final step in municipal potable water treatment has increased significantly over the past decade, with its application ranging from clarification and processing of drinking water to wastewater treatment plants where the wastewater is required to be polished before being discharged.
Dalecarlia Water Treatment Plant, Washington, D.C. Water treatment is any process that improves the quality of water to make it appropriate for a specific end-use. The end use may be drinking, industrial water supply, irrigation, river flow maintenance, water recreation or many other uses, including being safely returned to the environment.
The test bed, a Boeing 737-800 (registered as N76516), ran one of its engines on a mix of 50% kerosene, 6% algae oil, and 44% oil from jatropha, a weed that bears oil producing seeds. [125] The engine running partly on biofuel burned 46 kg (101 lb) less fuel than the conventional engine in 1 + 1 ⁄ 2 hours while producing more thrust using the ...
Slingshot is a water purification device created by inventor Dean Kamen. [1] Powered by a Stirling engine running on a combustible fuel source, it claims to be able to produce drinking water from almost any source [2] by means of vapor compression distillation, [3] requires no filters, and can operate using cow dung as fuel.