H david stensel (52 résultats)

hardcover. Etat : Very Good. May have light to moderate shelf wear and/or a remainder mark. Complete. Clean pages.

Hardcover. Etat : Very Good. No Jacket. May have limited writing in cover pages. Pages are unmarked. ~ ThriftBooks: Read More, Spend Less.

Etat : very_good. This book is in Very good condition. There may be a few flaws like shelf wear and some light wear.

4To Hardcover. Etat : Good. 4th ed. 10th ptg. 1818pp. White pictorial boards. Text and illustration is clean on unmarked, uncreased pages. Hinges are secure, textblock is square with pointed corners. Minimal overall shelf/timewear, boardwear, tape repair on front joint; faint spotting on textblock edges.…

Paper Back. Etat : Very Good. No writing or highlighting, nice clean condition.

Soft cover. Etat : Very Good. No Jacket (As issued). 4th Edition. In stock in Ireland - PAPERBACK - very good condition - with shelf scuffing - covers are scuffed - spine is uncreased and the spine text is clear - page block is clean and tidy - 2002 edition - THIS IS A VERY HEAVY BOOK AND WILL REQUIRED EXTRA POSTAGE COSTS - Wastewater Engineering: Treatment and Reuse, 4/e is an update of McGraw-Hill's popular book on wastewater treatment for civil and environmental engineering majors. It describes the technological and regulatory changes that have occurred over the last ten years in this discipline, including: Improved techniques for the characterization of wastewaters. Improved fundamental understanding of many of the existing unit operations and processes used for wastewater treatment, especially those processes used for the biological removal of nutrients. Greater implementation of several newer treatment technologies (e.g., UV disinfection, membrane filtration, and heat drying). Greater concern for the long term health and environmental impacts of wastewater constituents. Greater emphasis on advanced wastewater treatment and risk assessment for water reuse applications. Changes in regulations and the development of new technologies for wastewater disinfection.New regulations governing the treatment, reuse, and disposal of sludge (biosolids). Greater concern for infrastructure renewal including upgrading the design and performance of wastewater treatment plants. This revision contains a strong focus on advanced wastewater treatment technologies and stresses the reuse aspects of wastewater and biosolids. Theory and design issues are now integrated in the chapters on physical, chemical, and biological operations and processes. Combining this material presents a more unified approach to the subjects, and eliminates redundancies that appeared in the third edition. Chapters covering the theory and design of biological treatment systems have been expanded significantly. SI units are now the lead units, reflecting the global approach to wastewater engineering as it is taught in universities and presented in technical journals. This change addresses the volume of work being done by US consultants overseas, and supports the needs of engineering professionals outside the US for a comprehensive reference source. This edition retains the strengths of the previous edition by including many data tables. Data tables have been thoroughly updated, and approximately 40 new data tables have been added. Several new design examples have been added, reflecting the technological changes in process design that have occurred. Many new photos of facilities and equipment are included as well.…

Hardcover. Etat : Near Fine. No Jacket. 4th Edition. U.S. EDITION. Book is clean and tight and text is unmarked. Looks brand new except for original owner's last name written on the inside front cover.

Hardcover. Etat : Très bon. Ancien livre de bibliothèque avec équipements. Edition 2003. Ammareal reverse jusqu'à 15% du prix net de cet article à des organisations caritatives. ENGLISH DESCRIPTION Book Condition: Used, Very good. Former library book. Edition 2003. Ammareal gives back up to 15% of this item's net price to charity organizations.…

Etat : Good. Former library copy. Pages intact with minimal writing/highlighting. The binding may be loose and creased. Dust jackets/supplements are not included. Includes library markings. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good.

Etat : Very Good. Pages intact with possible writing/highlighting. Binding strong with minor wear. Dust jackets/supplements may not be included. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good.

Etat : Poor. This is an ex-library book and may have the usual library/used-book markings inside.This book has soft covers. In poor condition, suitable as a reading copy. Please note the Image in this listing is a stock photo and may not match the covers of the actual item,2750grams, ISBN:9780071122504. …

Etat : Poor. This is an ex-library book and may have the usual library/used-book markings inside.This book has soft covers. In poor condition, suitable as a reading copy. Please note the Image in this listing is a stock photo and may not match the covers of the actual item,2800grams, ISBN:9780071122504. …

Etat : Fine. Book is in Used-LikeNew condition. Pages and cover are clean and intact. Used items may not include supplementary materials such as CDs or access codes. May show signs of minor shelf wear.

hardcover. Etat : New. In shrink wrap. Looks like an interesting title.

Etat : New.

PAP. Etat : New. New Book. Shipped from UK. Established seller since 2000.

PAP. Etat : New. New Book. Shipped from UK. Established seller since 2000.

Paperback. Etat : New. Brand new book, sourced directly from publisher. Dispatch time is 24-48 hours from our warehouse. Book will be sent in robust, secure packaging to ensure it reaches you securely.

Etat : New.

Etat : As New. Unread book in perfect condition.

Etat : new.

Etat : NEW.

Paperback. Etat : new. Paperback. This report presents the results of an evaluation of technologies that may result in less biomass production in activated sludge processes. The report summarizes the results of a comprehensive literature review that was done to evaluate technologies in terms of their sludge reduction potential, ease of implementation, impacts on plant operations and effluent quality, reliability, and relative capital and operating costs. Reporting testing results supported significant biomass reduction by processes using chemical and thermal methods, higher life forms (predator processes), anaerobic instead of aerobic respiration, and extreme solids retention times, but biomass reduction for enhanced biological phosphorus removal (EBPR) processes and a mechanical disintegration process were less conclusive. The predator enhancement process showed promise for industrial wastewater treatment, but is less attractive for municipal wastewater treatment for which a lower soluble COD fraction is present. Extreme solids retention time processes may be practical for small wastewater flows and perhaps with the use of membrane separation technology. Anaerobic treatment processes are known to have a lower biomass yield (one fourth or a less than for aerobic treatment), but work is needed to develop their applications for low strength, low temperature wastewaters, such as in municipal wastewater treatment. For some processes such as the cell disruption using mechanical, thermal, and chemical means, the cost of implementing the biomass reduction technology was greater than the cost savings associated with less sludge production. Addition of chemical uncouplers can greatly reduce biomass production, but pose problems of toxic chemicals in the treated effluent. In a series of bench-scale tests carried out at the Seattle West Point wastewater treatment facility and the University of Washington environmental engineering laboratories the presence and mechanism of COD loss (and subsequent less biomass production) in the anaerobic zone of EBPR processes was investigated. The results of the test work and fundamental evaluation could not support previous claims of a COD loss in EBPR processes, nor was less sludge production observed. In a series of bench-scale tests carried out at the Seattle West Point wastewater treatment facility and the University of Washington environmental engineering laboratories the presence and mechanism of COD loss (and subsequent less biomass production) in the anaerobic zone of EBPR processes was investigated. Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

Etat : New. In English.

Etat : As New. Unread book in perfect condition.

Paperback. Etat : New. This report presents the results of an evaluation of technologies that may result in less biomass production in activated sludge processes. The report summarizes the results of a comprehensive literature review that was done to evaluate technologies in terms of their sludge reduction potential, ease of implementation, impacts on plant operations and effluent quality, reliability, and relative capital and operating costs. Reporting testing results supported significant biomass reduction by processes using chemical and thermal methods, higher life forms (predator processes), anaerobic instead of aerobic respiration, and extreme solids retention times, but biomass reduction for enhanced biological phosphorus removal (EBPR) processes and a mechanical disintegration process were less conclusive. The predator enhancement process showed promise for industrial wastewater treatment, but is less attractive for municipal wastewater treatment for which a lower soluble COD fraction is present. Extreme solids retention time processes may be practical for small wastewater flows and perhaps with the use of membrane separation technology. Anaerobic treatment processes are known to have a lower biomass yield (one fourth or a less than for aerobic treatment), but work is needed to develop their applications for low strength, low temperature wastewaters, such as in municipal wastewater treatment. For some processes such as the cell disruption using mechanical, thermal, and chemical means, the cost of implementing the biomass reduction technology was greater than the cost savings associated with less sludge production. Addition of chemical uncouplers can greatly reduce biomass production, but pose problems of toxic chemicals in the treated effluent. In a series of bench-scale tests carried out at the Seattle West Point wastewater treatment facility and the University of Washington environmental engineering laboratories the presence and mechanism of COD loss (and subsequent less biomass production) in the anaerobic zone of EBPR processes was investigated. The results of the test work and fundamental evaluation could not support previous claims of a COD loss in EBPR processes, nor was less sludge production observed.…

Etat : New. pp. 220 Illus.

Etat : New. In a series of bench-scale tests carried out at the Seattle West Point wastewater treatment facility and the University of Washington environmental engineering laboratories the presence and mechanism of COD loss (and subsequent less biomass production) in the anaerobic zone of EBPR processes was investigated. Series: WERF Research Report Series. Num Pages: 265 pages, 1, black & white illustrations. BIC Classification: TQSR1. Category: (P) Professional & Vocational. Dimension: 272 x 210 x 15. Weight in Grams: 522. . 2004. Paperback. . . . .…

Etat : As New. Unread book in perfect condition.

Etat : good. May show signs of wear, highlighting, writing, and previous use. This item may be a former library book with typical markings. No guarantee on products that contain supplements Your satisfaction is 100% guaranteed. Twenty-five year bookseller with shipments to over fifty million happy customers.…