Water Treatment and Plant Operation Processes II
Water treatment plants
The basic objective in the operation of drinking water treatment plants is to produce a drinking water that is safe and aesthetically pleasing at a reasonable cost with respect to capital as well as operation and maintenance. From a public health perspective, production of a safe drinking water is one that is free of harmful microorganisms and toxic materials, and this object is the first priority. It is also important to produce a high-quality, water that appeals to the consumer. Generally, the water must be clear, free of turbidity, colorless, and free of objectionable tastes and odors. Consumers also show a preference for water supplies that do not stain plumbing fixtures and clothes, do not corrode plumbing fixtures and piping, and do not leave scale deposits or spot glassware.
John Rowe
College of the Canyons Fall 2018
Text book
Water Distribution
A water distribution system is nothing more than a network of components designed to deliver water from a source to a user. It can be thought of as an array of piping networks and various pieces of equipment taking water from one location and delivering it to another. As a comparison, the human body has a number of different “distribution” systems. The circulatory system for example distributes blood throughout the body through a series of organs. You can also look at our roadways as a “distribution system”. You leave your house and follow a path to a destination. In between are turns, signals, signs, etc. Understanding this general description of water distribution systems by no means undermines the complexity of delivering safe and reliable drinking water to consumers.
Mike Alvord
https://www.canyons.edu
Textbook
Water Supply and Demand in California
You’re about to understand water demand and water supply more deeply. This understanding is going to change how you look at your water bill, grass in your yard and around town, and all those canals you see while driving around in California. Understanding the connection between demand and supply is critical to anyone working in the water industry today. Water demand is our need and use of water. Water supply refers to our sources of water. This textbook has three primary parts. In Part One, you will learn foundational concepts in water supply, including the water cycle, water management concepts, water rights and stakeholder concepts.
Stephanie Anagnoson
College Canyons
Water Treatment Plant Operation Processes I
Water Treatment ,
A very finite amount of water on our planet (0.34%) is available to treat for human consumption. Knowing where the water comes from assists certified operators in treating raw source water to make it potable. Newer technology has been developed to treat salinized or salty water found in the ocean. These treatment methods are still extremely expensive and not widely accessible. Supplying water to the public is an extremely important function in society as water is the basic building block of life. Because water quality is of the utmost importance new regulations and water quality standards are continually changing and evolving to make sure the public has safe sources of drinking water. The first drinking water standards were signed into law by President Ford in 1974 and it was known as the Safe Drinking Water Act (SDWA). Throughout the text new concepts will be introduced and an acronym will be given and used subsequently. You are going to learn to love acronyms if you become a certified operator. We use them quite frequently!
Vincent Titiriga
College of the Canyons
HYDRAULICS AND ELECTRICAL CONTROL OF HYDRAULIC SYSTEMS
ELECTRICAL CONTROL, HYDRAULIC SYSTEMS
Differentiate between fluid power systems and mechanical or electrical systems Differentiate between hydraulic and pneumatic systems with respect to the fluid medium employed, characteristics, capacity, performance, and cleanliness Describe a basic fluid power system in terms of power conversion. Describe the role of a prime mover like a motor or internal combustion engine in a fluid power system.Draw the schematic symbol for a motor and internal combustion engine. Describe the role of a pump in a fluid power system. Draw the schematic symbol for a pump and reservoir.Describe what properties pressure, flow rate, and valve position influence in a fluid power system. Describe Pascal’s Law and the formula used to relate force, pressure, and area.Describe the role of an actuator in a fluid power system. Draw the schematic symbol for a cylinder and hydraulic motor.
JIM PYTEL
Openoregon
WATE R QUAL ITY
This chapter presents a brief introduction on the water sources that are available for potable supply; detailed information is presented in Water 032 (Water Supply). Understanding the water sources used for potable application is important to appreciate the variety of contaminants that can be present in water, and assess their characteristics.
WATER , MATHEMATICS
The converting (or cancelling) of units is the most important concept in waterworks mathematics. You may be working with million gallons, cubic feet, acre feet, feet per second, gallons per minute, milligrams per liter, pounds per gallon, yard, ounce, parts per billion, etc., etc., etc. Units are the “driver” for problem solving in many waterworks math questions. The reason for this has to do with how processes are measured. For example, many water meters measure usage in hundred cubic feet. However, when Utility Managers report total usage by a class of customers it is typically expressed as acre feet or million gallons. Another example can be when dosage calculations are performed. Many times flow rates are measured as gallons per minute, but dosage computations require million gallons per day. These are just a couple of examples demonstrating the common conversion between units. In an introductory water mathematics course unit conversion is typically explained in a “unit by unit” break down. Here we are converting from cfs (cubic feet per sec) to gpm (gallon per minute).
Michael Alvord
Pipeline projects can be small jobs requiring only a few sticks of pipe. Or, they can be extensive jobs covering several miles or more. Regardless of the size of the job, it is important to properly plan. Preparing the pipe at the job site is an important aspect of job preparation. The pipe should be placed as close to the trench as possible. This makes it easier for the pipe to be accessed and placed into the trench. String the pipe on the opposite side of the trench as the dirt (spoils) that is being excavated and should be located away from traffic and heavy equipment. The bells should be located in the direction of installation and only enough pipe should be laid out for a days work. It is also important that the pipe is protected from rolling into the trench or away from the job site.
Wastewater Treatment
Proper wastewater treatment and disposal is essential for the vitality of a functioning society. Without it, a community’s environment can be severely polluted and the health of the public is at great risk. To better understand the relationship between wastewater treatment and water treatment and distribution, examine the urban water cycle (link). Like the typical hydrologic cycle, which shows the natural movement of water in the environment, the urban water cycle shows how water is moved in an urban environment. In some cases, as shown is FIG XX, (show detailed picture of typical community water/wastewater infrastructure) wastewater that has been treated by a wastewater treatment plant will be discharged back into a natural water body. Water from that water body will then be used by downstream communities as source water for their water treatment plants. If either of these two treatment facilities are not operating to current regulations and standards, public health is at risk. In addition, if the wastewater treatment facility is not operating properly there can also be additional environmental damage to the water body
Nick Steffen
The wastewater collection system is the network of pipes that convey the wastewater from households and business to a wastewater treatment facility. Each customer will have a lateral connected to the main sewer lines. In order to keep sediment from settling out in the collection system and causing a blockage the pipe is sloped to ensure a velocity of 2 ft/sec. A majority of the system will utilize the slope of the pipe and gravity so the water travels downhill. However, that is not always feasible and when needed a lift station will be installed. The lift station is comprised of a wet well where the wastewater is collected and pumps the water to a higher elevation where it can then resume to flow by gravity. The portion of the pressure pipe that is connected to the lift station is called a force main. The force main is always under pressure and the wastewater completely fills the pipe. Where a gravity sewer has minimal pressure and under normal conditions only about ⅓ of the pipe is filled with wastewater.