Rolling Revision of the WHO Guidelines for Drinking-Water Quality ...

4.3 Land disposal and treatment of wastewaters
4.4 Disposal of composted waste
4.5 Recirculation and re-use systems
4.5.1 Sanitation systems with source separation
4.5.2 Pond systems
4.5.3 Wetlands
4.5.4 Irrigation systems
4.6 References
Chapter 5 Agricultural practice and risk avoidance
5.1 Determining the nitrogen balance
5.2 Natural groundwater recharge and nitrate concentrations
5.3 Measures to reduce nitrogen surpluses in plant cultivation
5.3.1 Planning of fertilisation
5.3.2 The use of farm manure in livestock farming areas
5.3.3 Management practices to minimise emissions of nitrogen by farm
manure
5.3.4 Crop rotation, catch cropping, tillage and nitrogen leaching
5.3.5 Grassland farming
5.3.6 Special crops
5.4 Further measures to reduce nitrate pollution of water bodies
5.5 References
Chapter 6 Water treatment processes for reducing nitrate concentrations
6.1 Ion exchange denitrification
6.1.1 Basic principles
6.1.2 Plant and equipment
6.1.3 Operation and performance
6.2 Biological denitrification
6.2.1 Basic principles
6.2.2 Heterotrophic denitrification
6.2.3 Plant and equipment
6.2.4 Biological fluidised bed operation and performance
6.2.5 Autotrophic denitrification
6.3 Combination processes
6.4 Other methods
6.5 Advantages and limitations of treatment methods
6.6 References
Chapter 7 Problem evaluation and management
7.1 Monitoring and assessment
7.1.1 Groundwaters
7.1.2 Surface waters
7.2 Analytical methods
7.2.1 Water samples
7.2.2 Nitrogen, ammonia
7.2.3 Nitrogen, Kjeldahl
7.2.4 Nitrogen, nitrate
7.2.5 Nitrogen, nitrite