Ballast Water Management
Ballast Water Management

Author: Nadeem Anwar

Publisher:

Published: 2010

Total Pages: 161

ISBN-13: 9781905331970

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On a daily basis, every ship at sea, transports millions of marine organisms which have been taken onboard with ships' ballast water. The World Wildlife Fund has estimated that about 7.5 M litres of ballast water are released every hour into US waters alone with 10 Bn litres a year therefore being transferred round the world. In February 2004,

Feasibility, Design Criteria, and O&M Requirements for Small Scale Constructed Wetland Wastewater Treatment Systems
Feasibility, Design Criteria, and O&M Requirements for Small Scale Constructed Wetland Wastewater Treatment Systems

Author: S. Wallace

Publisher: IWA Publishing

Published: 2006-07-31

Total Pages: 0

ISBN-13: 9781843397281

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The expanding use of decentralized wastewater management has resulted in an increased interest in small-scale wetland treatment systems. However, there is limited information available on the use, distribution of and performance of these small-scale systems. The purpose of this study was to address this knowledge gap by developing criteria for the feasibility, design, operation, and maintenance of small-scale wetland treatment systems. Monitoring data from the assembled small-scale wetland database was used to develop sizing criteria for FWS and VSB wetlands. Loading rates and corresponding effluent quality were developed for BOD, TSS, TKN, phosphorus, and fecal coliform bacteria. Where there was adequate data, the variation in monthly vs. annual average effluent concentration was assessed to provide a factor-of-safety approach to wetland sizing. Information on internal processes, hydraulic design, operation, maintenance, cost, and industrial applications of constructed wetlands is also presented in this report.