Bøger udgivet af American Water Works Association

This standard covers 3- to 48-in. (76- to 1,219-mm) gray-iron and/or ductile-iron fittings to be used with ductile-iron pipe for water. Requirements for fittings with mechanical joints and flanged joints are listed in Tables 1 through 20 at the end of this standard. This standard may also be used for fittings with push-on joints or such other joints as may be agreed on at the time of purchase.

"The purpose of this manual is to educate and inform interested backflow prevention and cross-connection control program managers and administrators about the most current practices; to explore advantages and disadvantages of various policies regarding backflow prevention programs; and to provide thoughtful and meaningful topics for consideration when developing, implementing, and managing programs"--

"City leaders, Tucson Water employees, scientists, engineers, consultants, academics and many others worked together to not only solve the original problems but also to regain the trust of the public that had been destroyed by smelly, yellow, orange, brown and red water pouring out of home faucets. The lessons learned in Tucson about how to solve a water quality and treatment disaster can be applied to other situations where the faith and trust of the public have been lost"--

Here is a complete introduction and guide to UV technologies for the disinfection of drinking water. This book describes the powerful capabilities of ultraviolet light as a water disinfectant. It explains in detail UV how UV inactivates and makes harmless microbes by altering their DNA. It tells you how UV is measured and dosed to inactivate any type of microbe in your source water. You will understand how UV can fit into your specific treatment scheme, whether yours is a large, medium or small system using filtered or unfiltered water, an uncovered reservoir, groundwater, or surface water. The book describes the effects of turbidity, algae, and other water quality issues on UV performance, as well as pretreatment that may be needed prior to UV, such as filtration or chlorine reduction.You can use The Ultraviolet Disinfection Handbook to help you plan, purchase, install, and operate a UV installation. The book provides the specific information you need to know about UV equipment: major classes of UV water treatment systems, types of UV lamps, UV sensors, sleeves, power needs, and control equipment. In addition, chapters provide complete guidance and information on key design issues, including UV transmittance; equipment fouling and aging; equipment location, layout, and site constraints; flow and hydraulics; and electric power. It also explains USEPA requirements for validation of UV reactor performance prior to startup, plus operational requirements. You also will find helpful information on UV cost estimating.

Insurance investigator Richard Mallory is sent to recover a stolen Egyptian scarab, taken from a robbery at Rainsbury Hall. The main suspect is maverick Professor Charles Montacute and his daughter Jazmine.The chase ensues, and Mallory finds himself aboard the RMS Titanic, battling an ancient Mummy brought back to life for the sole purpose of wreaking revenge on those who have dared to plunder Egyptian heritage.If things were not bad enough, events are about to take a dramatic turn, for the Titanic is heading for disaster - below decks a fire rages out of control in the coal bunkers, endangering the very ship itself.At least there is no way that things could possibly get any worse.....................New EpilogueSet in present day, Victoria Mallory visits 221B Baker Street to try to solve the final mystery of 'The Titanic's Mummy, ' but finds much more than she could have bargained for!

The purpose of this handbook is to provide drinking water and water reuse professionals with information that can be used to answer the question, "If my system has a contaminant approaching or above the maximum contaminant level, is ion exchange a feasible technology and if so, what would be the basic characteristics of the ion exchange system?" >

"This manual presents the general practice for selection and installation of manual and automated knife gate valves for use in water and waste-water applications. This document is intended to provide information and guidance on typical knife gate valves and their intended application"--