Wetlands for tropical applications : wastewater treatment by constructed wetlands / edited by Norio Tanaka, Wun Jern Ng, K.B.S.N. Jinadasa.

Format:

Book

Contributor:

Tanaka, Norio.

Ng, W. J.

Jinadasa, K. B. S. N.

Language:

English

Subjects (All):

Constructed wetlands--Tropics.

Constructed wetlands.

Physical Description:

1 online resource (151 pages)

Edition:

1st ed.

Place of Publication:

London : Imperial College Press, [2011]

Language Note:

English

Summary:

This book provides a systematic exposition of the design features of constructed wetlands and their management (in terms of siting, physical maintenance, and operation). Only very few books (or chapters) have been published on constructed wetlands in tropical conditions and none are current. The selection of plant species, managing their growth and harvesting cycles, and the impact these have on the attenuation of organic and inorganic pollutants, nutrients, and pathogens would be of interest to students and practitioners of the art working under tropical conditions. The potential of constructed wetlands as a low-cost intervention for developing countries in tropical regions that faced water pollution problems, in particular, deserves to be explored systematically.

Contents:

CONTENTS; PREFACE; CHAPTER 1 AN INTRODUCTION TO WETLANDS IN THE TROPICS; 1.1 Definitions of Wetlands; 1.2 Geographic Distribution of Tropical Natural Wetlands; 1.3 Adoption to the Tropical Environment; 1.4 Constructed Wetlands in Tropical Climates; 1.5 Examples of Applications; CHAPTER 2 THE TROPICAL ENVIRONMENT; 2.1 Population and Food Production; 2.1.1 Demographics changes; 2.1.2 The rural economy; 2.1.3 Agriculture; 2.2 Changing Environments; 2.2.1 Water resources; 2.2.2 Water scarcity; 2.3 Environmental Degradation; 2.3.1 Access to safe water and pollution; 2.3.2 Wastewaters

2.4 Protecting the Environment2.4.1 Wastewater management; 2.4.2 Integrated water resources management (IWRM); 2.4.3 The role of government agencies and society; CHAPTER 3 POLLUTANTS AND WETLAND TREATMENT; 3.1 Wetland Treatment Process; 3.1.1 Introduction; 3.1.2 Types of wetlands; 3.1.3 Wetland configuration; 3.1.4 Wetland hydrology; 3.1.5 Soils in the wetland; 3.1.6 Wetland vegetation; 3.1.7 Role of wetland vegetation in the treatment process; 3.2 Pollutants and Their Transformations; 3.2.1 Biodegradable organics; 3.2.2 Suspended solids; 3.2.3 Nitrogen; 3.2.4 Phosphorus; 3.2.5 Sulfur

CHAPTER 4 WETLAND PLANT DYNAMICS4.1 Types of Macrophytes and Factors Affecting Their Growth; 4.1.1 Introduction; 4.1.2 Submergent macrophytes; 4.1.3 Emergent macrophytes; 4.1.4 Floating and floating-leave macrophytes; 4.1.5 Factors affecting macrophyte growth; 4.1.6 Effect of harvesting in wetlands; 4.1.7 The emission of greenhouse gases in the tropical wetland; 4.2 Role of Macrophytes in Wetlands; 4.3 Plant Physiology; 4.4 Case Study on Growth Characteristics of Wetland Macrophytes; CHAPTER 5 DESIGN OF TROPICAL CONSTRUCTED WETLANDS

5.1 The Importance of Wastewater Quality Parameters in Facility Design5.1.1 Influent wastewater characteristics and effluent water quality requirements; 5.1.2 Potential of wetlands for wastewater treatment under tropical conditions; 5.1.3 How wetlands improve water quality; 5.2 Process Design - Reaction Rate and Hydraulic Residence Time (HRT); 5.2.1 Reaction rates and HRT; 5.2.2 Sizing of constructed wetland (FWS and SSF); 5.2.3 Water depth in FWS; 5.2.4 Bed depth in SSF; 5.2.5 Effect of evaporation on the design; 5.2.6 Integration of wetland designs

5.3 Water Quality Improvement - A Tropical Case Study5.3.1 Effectiveness of Scirpus grossus in the treatment of domestic wastes in a constructed wetland; 5.4 Effects of Vegetation on Water Quality Improvement; CHAPTER 6 ENGINEERING THE WETLANDS; 6.1 Introduction; 6.2 Flow Control; 6.2.1 Need for flow control; 6.2.2 Inlet and outlet structures; 6.3 Substrate in Wetlands; 6.3.1 Sand and gravel; 6.3.2 Organic substrate; 6.4 Construction Aspects; 6.4.1 Site conditions; 6.4.2 Soil conditions; 6.4.3 Drainage; 6.4.4 Piping work; 6.4.5 Side walls; 6.4.6 Synthetic liners and clay liners

6.4.7 Planting

Notes:

Description based upon print version of record.

Includes bibliographical references and index.

ISBN:

9786613433138

9781283433136

1283433133

9781848162983

1848162987

OCLC:

775364037