Anaerobic/aerobic (AnA) and completely aerobic (CA) laboratory-scale sequencing batch reactors operating on an acetate- and casamino acids-based synthetic wastewater were used to investigate the suitability of the AnA process for treating nutrient?deficient wastewaters in plants that have stringent effluent nutrient requirements. Of particular interest is the case where phosphorus (P)-deficient wastewaters with highly variable influent COD loading are being treated to meet both effluent TSS and P limits. At a 4 d mean cell residence time, AnA activated sludge had an approx. 20% lower P...

The Activated Sludge (AS) Process is old technology but is still widely adopted worldwide for its convenience and simplicity: an impressive number (many hundred of thousands) of this kind of system are in operation. Occasionally, problems such as bulking and foaming occur, causing regulation violations and large investment is often required immediately to control them. For this reason, an intense research effort has been made during the last few decades to face these problems, and this report details the work undertaken by the IWA Specialist Group on Activated Sludge Population Dynamics. This...

Covering a wide range of structural elements and related defects, this collection of twenty concrete bridge strengthening and repair case studies showcases solutions to real problems encountered in the field and the processes by which those solutions were developed. Drawing on a lifetime of experience Atkins consultant Iain Kennedy Reid provides insight into methods of investigation and diagnosis of problems relating to beams, slabs, columns and panel walls, as well as how to apply demand-led research to these problems in a practical way.

Given the enduring importance of Aristotle's Nicomachean Ethics, it is remarkable to find that there is no extensive surviving commentary on this text from the period between the second century and the twelfth century. This volume is focused on the first of the medieval commentaries, that produced in the early twelfth century by Eustratios of Nicaea, Michael of Ephesus, and an anonymous author in Constantinople. This endeavor was to have a significant impact on the reception of the Nicomachean Ethics in Latin and Catholic Europe. For, in the mid-thirteenth century, Robert...

Do your performance measures seek primarily to detect and control undesirable activities, rather than sharing and rewarding productive behaviour? Every organisation needs to measure its performance and that of the people it employs; David Jenkins shows you how to make more productive use of such measures. For measures to be accurate and reliable there are fundamental rules that need to be applied. Ignoring or misapplying them undermines performance and impedes the achievement of the corporate goal. For any enterprise, data must be available across the whole spectrum of activity in which it is...

In 1891, Lars Peter Hansen, a native of Copenhagen, settled in Cardiff and, with his third son, Leslie, established a photographic business at the Cardiff Docks, selling pictures of ships to seamen and shipowners. Following the retirement of Leslie Hansen in 1975, the Welsh Industrial and Maritime Museum purchased the Hansen Collection, consisting of over 4,500 negatives of photographs taken at the docks between 1920 and 1975. This volume, which gorgeously reproduces a number of these images, is intended as a tribute to the Hansens, who through their work have bequeathed to Wales a pictorial...

From 1875 to the present day, the Cardiff and Bristol Channel Incorporated Shipowners Association has been the representative body for shipowners in Cardiff and other Bristol Channel ports. Here David Jenkins looks at some of the most representative moments in its history: the reaction of the association to the proposal to build new docks in Barry in the 1880s, the Seamen s Strike in 1911, and the schism that split the Association in 1912 14, among others."

Helps readers learn about the anatomy of the limbs and back. This book includes quick-reference tables and illustrations.

Now in an updated and expanded edition, this book is an invaluable guide to the work of one of the world's leading architectural practices.

Activated Sludge - 100 Years and Counting covers the current status of all aspects of the activated sludge process and looks forward to its further development in the future. It celebrates 100 years of the Activated Sludge process, from the time that the early developers presented the seminal works that led to its eventual worldwide adoption. The book assembles contributions from renowned world leaders in activated sludge research, development, technology and application. The objective of the book is to summarise the knowledge of all aspects of the activated sludge process and to present and...