Donald m gray (24 Ergebnisse)

Hardcover. Zustand: Good. No Jacket. Pages can have notes/highlighting. Spine may show signs of wear. ~ ThriftBooks: Read More, Spend Less.

Encompassing about 21,000 km in southwestern Arizona, the Ajo an Lukeville 1º by 2º quadrangles have been the subject of mineral resource investigations utilizing field and laboratory studies in the disciplines of geology, geochemistry, geophysics, and Landsat imagery. DH4. stapled binding, 11" Tall, cover clean, 27 pages. …

Hardback. Zustand: Very Good. Keith M. Gray (illustrator).

Cloth. Zustand: Very Good. Zustand des Schutzumschlags: Very Good. First Edition. 289pp. How to treat yourself at home and how to make the best of your GP's time . Dj slightly faded to spine.

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

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

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

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

Zustand: New. In English.

Zustand: New. pp. 196 6:B&W 8.25 x 11 in or 280 x 210 mm Perfect Bound on White w/Gloss Lam.

Zustand: New. pp. 220 Illus.

Paperback. Zustand: Brand New. 130 pages. 10.80x8.20x0.50 inches. In Stock.

Paperback. Zustand: Brand New. illustrated edition. 220 pages. 11.25x8.00x0.50 inches. In Stock.

Zustand: New. KlappentextrnrnSuccessful operation of the activated sludge process relies heavily on the ability to effectively separate mixed liquor into return activated sludge (RAS) and a high quality final effluent. Solids separation efficiency is dictated.

Zustand: New. KlappentextrnrnThe purpose of this research was to evaluate and compare various thermophilic anaerobic digestion processes for meeting U.S. EPA biosolids Class A pathogen standards. The project was split into three phases. Phase 1 screened three.

Taschenbuch. Zustand: Neu. Neuware - Successful operation of the activated sludge process relies heavily on the ability to effectively separate mixed liquor into return activated sludge (RAS) and a high quality final effluent. Solids separation efficiency is dictated in large part by the relative population of floc-forming and filamentous microorganisms present in the activated sludge. During normal operation, mixed liquor will be composed primarily of floc-formers with relatively low levels of filamentous organisms. Some population of filamentous organisms is necessary to promote the formation of larger flocs and prevent development of a 'pin-floc' condition, which often results in high effluent turbidities (Jenkins, 2004). However, when conditions favoring the growth of filaments over floc-formers occur, a condition commonly referred to as filamentous 'bulking' may occur.…

Taschenbuch. Zustand: Neu. Neuware - The purpose of this research was to evaluate and compare various thermophilic anaerobic digestion processes for meeting U.S. EPA biosolids Class A pathogen standards. The project was split into three phases. Phase 1 screened three bench-scale thermophilic anaerobic process configurations at three different thermophilic temperatures based on their fecal coliform destruction efficiency. All three of the thermophilic process configurations tested were capable of achieving the Class A fecal coliform standard and were included in Phase 2. In Phase 2, bench-scale anaerobic digesters were fed primary sludge seeded with E.coli, helminth ova, poliovirus, and Salmonella to evaluate pathogen destruction. Two process configurations, the thermophilic single-stage and the two-stage mesophilic acid-phase/thermophilic methane-phase system, met Class A requirements at 50oC. In Phase 3, the single-stage thermophilic anaerobic digestion process was compared to the single-stage mesophilic process at full scale (1.5-MG digesters) based on fecal coliform and pathogen destruction, process performance, digested sludge dewaterability, and odor generation. Pathogen destruction and process performance comparisons of the various process configurations are presented for each phase of the study. Based on the fecal coliform data presented here, an empirical model was developed for quantitatively comparing multiple stage and single-stage thermophilic anaerobic digester performance. The model demonstrates that various combinations of thermophilic temperatures, staging, and residence times can achieve the Class A fecal coliform requirement. This study also suggests that anaerobic digesters operating in the lower thermophilic temperature range (approximately 50°C) are not only capable of achieving Class A requirements but may also produce digested sludges with less odor and lower volatile solids than digesters operating at higher thermophilic temperatures.…

Zustand: New. 2007. paperback. . . . . . Books ship from the US and Ireland.

Zustand: New. 2004. paperback. . . . . . Books ship from the US and Ireland.

Taschenbuch. Zustand: Neu. Pathogen Destruction Efficiency in High-Temperature Digestion | Donald M. Gray (u. a.) | Taschenbuch | Werf Research Report | Kartoniert / Broschiert | Englisch | 2004 | IWA PUB | EAN 9781843396963 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, mail[at]preigu[dot]de | Anbieter: preigu.…

Taschenbuch. Zustand: Neu. Develop and Demonstrate Fundamental Basis for Selectors to Improve Activated Sludge Settleability | Donald M. D. Gray (u. a.) | Taschenbuch | Final Report Wastewater Treatm | Kartoniert / Broschiert | Englisch | 2007 | Werf | EAN 9781843397526 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, mail[at]preigu[dot]de | Anbieter: preigu.…

Zustand: good. Gently used with minimal wear on the corners and cover. A few pages may contain light highlighting or writing, but the text remains fully legible. Dust jacket may be missing, and supplemental materials like CDs or codes may not be included. May be ex-library with library markings. Ships promptly. …

1st.ed. "One Church three traditions.christians at worship.the christian calendar.the christian experience." Pp, 153, many b/w illustrations. P/b, illustrated cover. G+.

Paperback. Zustand: Very Good. First Edition. 92 pages. Black and white illustrations. Features: The Old Hess Street School, Hamilton; "Fronteschwein: (Trench Hog); The History of the Stoney Creek United Church, 1792-1925; The History of Duncans of Hamilton; James Durand's Eventful Careers, 1802-1834; The Story of Archibald Kerr, Thomas C. Kerr, and Inglewood; From Washington Boultbee's Diary, 1837-1841; Burlington Beach Volunteer Firemen's Association; My Company - Bell Canada; baptismal Records of the Church of the Ascension (Anglican) Hamilton, 1854. Clean and unmarked with light wear. A quality copy. …