is 200 mg/L‚ and the BOD removal efficiency in that tank is 35 percent. Compute the organic load on the trickling filter. 2. A grit of specific gravity 2.8 flows into a grit chamber‚ 1.5-m wide‚ 10.5-m long and 2.5-m deep. The flow-rate of wastewater into the chamber is 2 m3/s. What is the minimum radius of the grit (in mm) if it was to be captured by the grit chamber? Assume the flow is laminar and Stoke’s Law is applicable. first‚ I need to find the value of horizontal velocity
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Chapter 1 INTRODUCTION Around the world for centuries‚ the buying and selling of food has been transacted in public market places open to all. In the broadcast definition‚ a public market is any place where buyers and sellers of food meet regularly for trade. From simple gatherings of farmers at country cross roads to 19th century cathedrals of glass and iron‚ market were once a primary channel of food distribution in cities both in the Philippines and abroad. Where food is concerned‚ few
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Report 2012 Introduction Wastewater is any water that has been adversely affected in quality by anthropogenic influence. It comprises liquid waste discharged by domestic residences‚ commercial properties‚ industry‚ and/or agriculture and can encompass a wide range of potential contaminants and concentrations. In the most common usage‚ it refers to the municipal wastewater that contains a broad spectrum of contaminants resulting from the mixing of wastewaters from different sources. Sewage is
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Conventional value stream mapping can overlook environmental wastes‚ such as: • • • Energy‚ water‚ or raw materials used in excess of what is needed to meet consumer needs Pollutants and material wastes released into the environment‚ such as air emissions‚ wastewater discharges‚ hazardous wastes‚ and solid wastes (trash or discarded scrap) Hazardous substances that adversely affect human health or the environment during their use in production or presence in products. The Green Suppliers Network incorporates
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We reached our goals through our experimentation. We tested the solubility of each of the starting and ending materials in water‚ HCl‚ NaOH‚ toluene‚ and acetone. We discovered that the starting materials would only dissolve in toluene. To make the soap‚ we obtained about 10 mL of vegetable oil and 10 g of lard and we placed them both in separate 250 mL beakers. While we were stirring the compounds‚ we also added 15 mL of 6 M NaOH drop by drop and 1 mL of glycerol. We then heated our solutions
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..........................................609 10.5.7 Co-benefits of GHG mitigation policies .............610 10.2 Status of the waste management sector ..... 591 10.2.1 Waste generation ............................................591 10.2.2 Wastewater generation
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Glossary Chapter 21 advanced sewage treatment Specialized chemical and physical processes that reduce the amount of specific pollutants left in wastewater after primary and secondary sewage treatment. This type of treatment usually is expensive. See also primary sewage treatment‚ secondary sewage treatment. biological oxygen demand (BOD) Amount of dissolved oxygen needed by aerobic decomposers to break down the organic materials in a given volume of water at a certain temperature over
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Biochemical Engineering Journal 36 (2007) 174–181 Removal of heavy metal from industrial wastewater using modified activated coconut shell carbon O.S. Amuda a‚∗ ‚ A.A. Giwa a ‚ I.A. Bello b Environmental/Analytical Chemistry Unit‚ Department of Pure and Applied Chemistry‚ Ladoke Akintola University of Technology‚ Ogbomoso 210001‚ Nigeria b Physical Chemistry Unit‚ Department of Pure and Applied Chemistry‚ Ladoke Akintola University of Technology‚ Ogbomoso 210001‚ Nigeria Received 1 September
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But what residents don’t think about is raw sewage in their neighborhoods or communities. Pasco County residents recently experienced the misery of sewage into Tampa Bay and also in their neighborhoods. According to the Tampa Bay Times‚ “Tampa wastewater officials said Wednesday that Hurricane Hermine’s heavy winds and rain led to 1.7 million gallons of raw and partially treated
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Supported response (1 to 3 concise sentences are sufficient; be specific!) 4 Part1: If the manager of the City Wastewater Treatment Plant wants to increase the HRT of a process‚ he/she should a. build a different size tank. b. change the volume of liquid held in an existing tank. c. change the influent flowrate‚ effluent flowrate
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