Effect of Operational Variables on Nitrogen Transformations in Duckweed Stabilization Ponds

ISBN-13: 9780415375542 / Angielski / Miękka / 2005 / 163 str.

Julia Rosa Caicedo Bejarano

Opis

In response to the urgent need to develop and improve low cost technologies for wastewater treatment, this thesis explores how to treat wastewater with duckweed in a pond system, a solution that contributes both environmental protection and food production. The book reports on the effect of different operational variables, like anaerobic pre-treatment, the combination of algae and duckweed ponds and pond depth. It discusses improved nitrogen removal through the combination of duckweed ponds with algae ponds. It also demonstrates how duckweed pond systems could be designed with shallow depth without affecting nitrogen removal efficiency.

Spis treści

1.Introduction 2.Effect of anaerobic pre-treatment on environmental physicochemicalcharacteristics of duckweed stabilization ponds. 3. Effect of total ammonia nitrogen concentration and pH on growth rates of duckweed 4. The effect of anaerobic pre-treatment performance ofduckweed 5.Nitrogen balance of duckweed covered sewagestabilization ponds. 6. The effect of introducing aerobic zones into a series of duckweed stabilization ponds on nitrification and denitrification. 7. Effect of pond depth on removal of nitrogen in duckweed stabilization ponds. 8.Comparison of performance of full scale duckweed and algae stabilization ponds. 9. Summary 10.Conclusion

O autorze

Julia Rosa Caicedo is a PhD student associated with the IHE Delft, the Netherlands.