Env activity set for city collegea new (recovered)this one


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Env activity set for city collegea new (recovered)this one

  1. 1. Assessment in Science Education Dr. Craig Fall ‘06 Unit Plan-WASTE WATER SYSTEM New York City’s Wastewater Treatment System: History and development Rachell Gordon Angie Palancios Beilka Diaz Bingyi Wang Rational and Purpose Statement: This is a 15 day lesson for students (and faculty) to explore the facets of city planning and disaster planning Adapted from: http://cfpub.epa.gov/npdes/wastewatermonth.cfm Earth Science topics: Global Warming, Photochemical Smog, Urban Heat Islands, Acid Rain Trips: Trips to the Bronx River Alliance, Beats avenue Incinerator (Green Point, Brooklyn), Green Point Sewage Plant would be convenient to qualify lessons. Day 1 Day 2 Day 3 Day 4 Day 5 Aim: How do we read an topographical map What is an aquafier system?? Aim: what is Wastewater Treatment – Aim: Wastewater Treatment – Past and Present? Aim: Modeling of Wastewater Aim: Waste Water Treatment: what is industrial
  2. 2. Treatment Processes waste?? Day 6 Day 7 Day 8 Day 9 Day 10 Day 11 Day 12 Day 13 Day 14 Day 15 Aim: Student Presentations Glossary of Chemical Terms • biochemical oxidation, • biomass decay, • hydrolysis of particulate matter, • chemical oxidation, • photolysis, • adsorption on particulate matter Combined Sewer Overflows Digestion Disinfection Dry Weather Discharges Floating Debris Grease Industrial Pretreatment Program (IPP) Perchloroethylene Program (PERC Persistent Pollutant Track-down Program Pollution Prevention Program Preliminary Treatment Primary Treatment Pumping Station Telemetry
  3. 3. Secondary Treatment Sludge Treatment Thickening Water Quality Monitoring Regulatory Telemetry System / Enhanced Beach Protection Program Nutrients Water Waste Day 1: Activity Set-Up: Ward Treatent facility-Map of New York Harbor and Historical Sampling Sites Demonstration video-waster water system: developed of from Dutch era in New York Aim: How do we describe a waste water system? How do we read an topographical map What is an aquafier system?? Adapted fro http://cfpub.epa.gov/npdes/wastewatermonth.cfm I.O./SWABT 1. Draw the parts of waste water system 2. Express the terms needed in the digestion of sewage 3. Make reasonable drawing and know the systemic parts of a Waste Water System 4. explain the new SEWAGE COLLECTION AND DISPOSAL system PROCESS STANDARDS: http://www.emsc.nysed.gov/ciai/mst/sciencestand/physset13.html New York State Learning Standards: The following are addressed in this lesson.
  4. 4. Standard 1: Analysis, Inquiry and Design Mathematical Analysis Students will use mathematical analysis, scientific inquiry, and engineering design, as appropriate, to pose questions, seek answers, and develop solutions. Standard 4: Science Students will understand and apply scientific concepts, principles, and theories pertaining to physical setting and physics. Standard 6: Interconnectedness: Common Themes Students will understand the relationships and common themes that connect mathematics, and science, and apply the themes to these and other areas of learning. Materials: OAK TAG -4’ BY 6’ BOARDS-markets- Computer on Wheels, if available laptops-handout of maps of New York Aquifier system Hudson river Morraine Procedure: students will review topographic maps, aquifer system, sewage plant design them in groups of 3-4- will draw the waste water systems Motivation student’s will watch a video about the damage Hurricane Sandy has recently done to new York They will isolate and be ready to next read the below passage and isolate relavent vocubulatary from Question: do you know why sewages systems were developed and by who?/ Stimulate interest( lead topic) How did the engineers assess the damage done by hurricane sandy to the Staten Island Ferry operation-foremost-our sewage system in wall street area is too flooded to be use what and who are needed? Students will be handed the below passage
  5. 5. “””Each day New York City delivers about 1.3 billion gallons of safe drinking water to over 8 million City residents and another 1 million consumers who live in Westchester, Putnam, Ulster and Orange Counties north of the City. The source of New York City’s drinking water is suppliedby a network of 19 reservoirs and three controlled lakes ina 1,972 square-mile watershed that extends 125 milesnorth and west of New York City. Between the water supply and wastewater treatment systems are millions of New Yorkers and visitors to the City and an elaborate network of sewers and water mains. Each person can help these systems run better byconserving water, disposing of garbage and household chemicals properly and being concerned about water quality in the City’s surrounding waters. Where does used water go? Used water goes into New York City’s extensive wastewater treatment system. This amazing network system that cleans our wastewater consists of: over 6,000 miles of sewer pipes; 135,000 sewer catch basins; over 494 permitted outfalls for the discharge of combined sewer overflows (CSOs) and stormwater; 93 wastewater pumping stations that transport it to 14 wastewater treatment plants located throughout the five boroughs. The New York City Department of Environmental Protection (DEP), Bureau of Wastewater Treatment (BWT) is responsible for the operation and maintenance of all facilities related to the treatment of sewage. The Bureau of Wastewater Treatment has 1,900 employees, an annual operating budget of $262 million, and an annual capital budget of $114 million. With these resources, the 1.4 billion gallons of wastewater discharged by eight million residents and workers in New York City each and every day is processed at the treatment plants. After the treatment process is completed, the plants release high- quality, treated wastewater, called effluent, into the waterways surrounding New York City go to diagram of system-have students draw this system on oak tag boards INTRODUCTION-(pass out markers and boards now) (read aload): This lesson covers design and Industrial sewage is the waste from an maintenance of sewage systems and industrial process such as dyeing,
  6. 6. treatment facilities. Storm sewage operations, engineer units are is the water and particles carried due responsible for waste disposal when to rainfall. Infiltration is the waterborne sewage-disposal systems are ground water and particles which leak practical and authorized. Decision as into a sewer through joints or breaks. To whether waterborne sewage Medical units are responsible for racks, garages, and shop floor drains investigating, reporting and making also should be excluded. Waste from recommendations on all matters laundries, however, is usually affecting the health of Army discharged into the TO sewer system. personnel. Other types of industrial waste may bedischarged into the system, depending Assessment: 1. Will be the student projects 2. Will be student presentations to the class at the end of the 15 day period
  7. 7. Student will read the below passage at the beginning of class –then they will go over the parts of sewage system and describe them to the best of there ability Treatment Process WHAT IS WASTEWATER? Wastewater is liquid waste. It is animal, vegetable, mineral or chemical matter in solution or in suspension that residents and businesses flush down their toilets and pour down their sinks and drains. Wastewater drains into a network of pipes maintained by sewer serviced municipalities and the Regional District of Nanaimo. Sewer systems are built to follow the natural slope of land, generally flowing towards the sea front. This design allows gravity to do most of the work transporting the wastewater to one of four wastewater treatment plants. For residential areas that are lower than adjacent lands or treatment plants, the wastewater must pass through a pumping station to pump the liquid into the plants. Treatment of our wastewater is an essential process that prevents contamination and destruction of our waterways, and our natural water resources. HOW IS WASTEWATER TREATED IN THE RDN? Generally wastewater treatment involves the following processes:
  8. 8. 1. Preliminary treatment - The velocity of the wastewater from the sewer lines is reduced as it enters the treatment plant. This allows sand, gravel and other heavy materials to settle out into grit tanks. Mechanical cleaning bar screens then remove rags, sticks, plastic and other foreign objects from the wastewater; this part of the treatment plant is called the headworks. Bar screens may be used before or after the grit tanks. All removed material collected by grit tanks and bar screens is washed and then taken to a sanitary landfill for disposal. 2. Primary treatment - Primary treatment allows for the physical separation of solids and grease from the wastewater, and removes between 30-40 percent of Biological Oxygen Demand and 50 per cent of Total Suspended Solids. The screened wastewater flows into a primary settling tank where it is held for several hours allowing solid particles to settle to the bottom of the tank. Fats, oil and grease (FOG) are skimmed from the tanks, dried and sent to the landfill. The settled particles are known as primary sludge, which is collected and pumped to large digestion or holding tanks for further treatment and solids processing. Presently, Greater Nanaimo and Nanoose Wastewater Treatment Plants provide primary treatment and discharge treated effluent to the ocean. 3. Secondary treatment - Secondary treatment is a biological treatment process that removes up to 90 percent of BOD and TSS. Following primary treatment, effluent is pumped to the secondary treatment stage. It may take one of several forms; for example, either a trickling filter or a sequencing batch reactor. The growth of microorgisms results from the consumption of organic matter in the wastewater as their food supply.
  9. 9. The micro-organisms create a solid organic material (sludge), which just like the sludge from primary treatment. Secondary sludge is thickened and pumped to digesters for processing and solids processing. The French Creek and Duke Point Treatment Plants discharge secondary treated effluent into the Strait Georgia. 4. Final treatment - The wastewater that remains can be disinfected to kill harmful micro- organisms before being released into receiving waters. Although there are many methods available to kill these micro-organisms, ultraviolet disinfection is the method used at Duke Point Pollution Control Centre. This is the only treatment plant in the RDN with this technology. At this stage, the treated wastewater, now called final effluent, is discharged into the marine environment. 5. Solids processing - Primary solids from the primary settling tank and secondary solids from the clarifier are sent to digesters for solids processing. During this process, micro-organisms use the organic material present in the solids as a food source and convert it to by-products such as methane gas and water. Digestion results in a 90% reduction of pathogens and the production of a wet soil-like material called "biosolids" that contain 95-97% water. In order to remove some of this water, mechanical equipment such as a belt filter press or centrifuge are used to squeeze water from the biosolids, reducing its volume prior to being used in soil amendment or composting. A more advanced look at the system would be: MINI GLOSSARY BOD5 (Biochemical Oxygen Demand) is a measure of the quantity of oxygen consumed by microorganisms to break down organic matter in water. A high BOD means that there will be less oxygen; and oxygen is essential for the survival of aquatic life. Thus, high BOD levels result in the contamination of the receiving (marine) environment. TSS (Total Suspended Solids) are solid pollutants that would be captured on a fine filter paper. They are visible in water and decrease water clarity. High concentrations of TSS can cause many problems for aquatic life.
  10. 10. Day 2: Activity Set-Up: Demonstration (Authority: Robert Craig) Activity Set-Up: students review and take notes on power point one and two Aim: Wastewater Treatment – Past and Present? I.O./SWABT 1. CONTENT STANDARD: (THE PHYSICAL SETTING) www.nysed.gov PROCESS STANDARDS: http://www.emsc.nysed.gov/ciai/mst/sciencestand/physset13.html New York State Learning Standards: The following are addressed in this lesson. Standard 4: Science Students will understand and apply scientific concepts, principles, and theories pertaining to physical setting and physics. Standard 6: Interconnectedness: Common Themes Students will understand the relationships and common themes that connect mathematics, and science, and apply the themes to these and other areas of learning. Standard 7: Interdisciplinary Problem Solving Students will apply the knowledge and thinking skills of mathematics, and science, to address real-life problems and make informed decisions.
  11. 11. Materials: