Effect of Algal Biofilm and Operational Conditions on Nitrogen Removal in Waste Stabilization Ponds UNESCO-IHE PhD Thesis
Auteur : Babu Mohammed
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
Date de parution : 11-2017
21x28 cm
Disponible chez l'éditeur (délai d'approvisionnement : 14 jours).
Prix indicatif 214,69 €
Ajouter au panierDate de parution : 05-2011
21x28 cm
Disponible chez l'éditeur (délai d'approvisionnement : 14 jours).
Prix indicatif 87,11 €
Ajouter au panierThèmes d’Effect of Algal Biofilm and Operational Conditions on... :
Mots-clés :
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