![]() Understand the steps of the engineering design process.Įvaluate or refine a technological solution that reduces impacts of human activities on natural systems.Ĭlick to view other curriculum aligned to this Performance Expectation.Provide qualitative and quantitative results that describe the success (or failure) of a model filtering system in meeting the project objectives.Develop and test a model for an innovative and efficient water filtration system, and recover resources.The removal of plastic from a water source is a new challenge for engineers, given the fact that plastic is not soluble nor magnetic and varies in its size and decomposition state.Īfter this activity, students should be able to: Filters and settling are common mechanical processes used to remove large particles from raw wastewater. They use a variety of stages and processes to remove solids and contaminants from wastewater, including biological and mechanical processes. This engineering curriculum aligns to Next Generation Science Standards ( NGSS).Ĭopyright © 2017 SHIFTED RET Program, University of Kansas Lawrence and GreenbushĮnvironmental engineers design wastewater treatment plants to clean water before discharging into rivers, streams, lakes and seas. ![]() They conduct common water quality tests (such as turbidity, pH, etc., as determined by the teacher) to check the water quality before and after treatment. They design and build the filtering systems, redesigning for improvement, and then measuring and comparing results (across teams): reclaimed quantities, water quality tests, costs, experiences and best practices. They aim to remove the water contaminants while reclaiming the waste material as valuable resources. ![]() Drawing from assorted provided materials (gravel, pebbles, sand, activated charcoal, algae, coffee filters, cloth) and staying within a (hypothetical) budget, teams create filter systems within 2-liter plastic bottles to clean the teacher-made simulated wastewater (soap, oil, sand, fertilizer, coffee grounds, beads). In uses where there is a greater human exposure water may require more treatment.Student teams design and then create small-size models of working filter systems to simulate multi-stage wastewater treatment plants. For example, reclaimed water for crop irrigation would need to be of sufficient quality to prevent harm to plants and soils, maintain food safety, and protect the health of farm workers. "Fit-for-purpose specifications” are the treatment requirements to bring water from a particular source to the quality needed, to ensure public health, environmental protection, or specific user needs. These sources of water are adequately treated to meet “fit-for-purpose specifications” for a particular next use. Sources of water for potential reuse can include municipal wastewater, industry process and cooling water, stormwater, agriculture runoff and return flows, and produced water from natural resource extraction activities. Examples of planned reuse include agricultural and landscape irrigation, industrial process water, potable water supplies, and groundwater supply management. Often, communities will seek to optimize their overall water use by reusing water to the extent possible within the community, before the water is reintroduced to the environment. Planned water reuse refers to water systems designed with the goal of beneficially reusing a recycled water supply. A common example of unplanned water reuse occurs when communities draw their water supplies from rivers, such as the Colorado River and the Mississippi River, that receive treated wastewater discharges from communities upstream. Unplanned water reuse refers to situations in which a source of water is substantially composed of previously-used water. ![]() Water reuse can be defined as planned or unplanned. Water reuse can provide alternatives to existing water supplies and be used to enhance water security, sustainability, and resilience. Water reuse (also commonly known as water recycling or water reclamation) reclaims water from a variety of sources then treats and reuses it for beneficial purposes such as agriculture and irrigation, potable water supplies, groundwater replenishment, industrial processes, and environmental restoration. Water Reuse Regulations in the United States ![]()
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