Description
Effect of Algal Biofilm and Operational Conditions on Nitrogen Removal in Waste Stabilization Ponds
UNESCO-IHE PhD Thesis
Author: Babu Mohammed
Language: EnglishSubjects for Effect of Algal Biofilm and Operational Conditions on...:
Keywords
WSP; Nitrification Rates; Maturation Ponds; Nitrogen Removal; Algal Biofilms; Bulk Water; Stabilization Ponds; Nitrogen Mass Balances; Effluent TSS; Influent Ammonia; Facultative Pond; Influent Bod; Algal Uptake; Ammonia Uptake; Synthetic Wastewater; Cod Concentration; Ammonia Removal; Total Influent Nitrogen; Ammonia Volatilization Rate; Hydraulic Retention Time; Bod Ratio; Dark Conditions; Dispersion Number; Biofilm Biomass; Total Nitrogen Removal Efficiencies
Publication date: 11-2017
· 21x28 cm · Hardback
Publication date: 05-2011
· 21x28 cm · Paperback
Description
/li>Contents
/li>Readership
/li>Biography
/li>
Discharge of nutrient rich wastewater causes eutrophication of surface water; therefore wastewater treatment before discharge is required. Wastewater stabilization ponds are low cost technology used by developing countries but not effective in nitrogen removal due to low nitrifier biomass in the water column. Introduction of surface area for attachment of nitrifiers has therefore been proposed.
This thesis reports the performance of pilot scale wastewater stabilization ponds fitted with baffles. The effect of baffles on nitrogen removal under tropical and two operational conditions was investigated. Under TKN/BOD ratio of 0.67, the baffled ponds performed better in nitrogen removal than the control pond. Total nitrogen mass balances showed that nitrification-denitrification, algal uptake and sedimentation were principle nitrogen removal mechanisms in biofilm waste stabilization ponds
This study shows the potential of biofilms in improving nitrogen removal in wastewater stabilization ponds. The BOD and TSS concentrations were sufficiently low to permit for reuse in irrigation. If the objective is reuse and optimization of resources, the effluents from the ponds had sufficient nitrogen content for use in agriculture.
1. Introduction 2 The effect of baffles on algal-bacterial biofilm structure and composition of zooplankton 3 Comparison of hydraulic flow patterns 4 Nitrification in bulk water and biofilms 5 Nitrification rates of algal-bacterial biofilms 6 Effect of operational conditions on the nitrogen removal 7 Nitrogen mass balances for pilot scale biofilm stabilization ponds under tropical conditions