Photo-Activated Sludge: A Novel Algal-Bacterial Biotreatment for Nitrogen Removal from Wastewater Photo-Activated Sludge: A Novel Algal-Bacterial Biotreatment for Nitrogen Removal from Wastewater
IHE Delft PhD Thesis Series

Photo-Activated Sludge: A Novel Algal-Bacterial Biotreatment for Nitrogen Removal from Wastewater

    • 104,99 €
    • 104,99 €

Publisher Description

Nitrogen rich wastewaters (10-400 mg N L-1) are usually produced by municipal, industrial and agricultural wastes, such as effluents from anaerobic treatments. These represent a risk to the environment due to the high nutrient concentrations (nitrogen and phosphorous), which can cause eutrophication of water bodies, deteriorating the quality of the ecosystems. As a solution, the potential nitrogen removal capacity of a novel bio-treatment system, namely the Photo-Activated Sludge (PAS), which is composed of microalgae and bacteria consortia, is presented in this thesis. This novel bio-treatment is based on the symbiosis between microalgae, nitrifiers and heterotrophic bacteria (microalgal-bacterial consortia). Experimental work using photobioreactors for the cultivation of microalgae and bacteria under sequencing batch conditions showed that microalgal-bacterial consortia can remove ammonium 50% faster than solely microalgal consortia. The increase in ammonium removal rates was due to the action of nitrifying bacteria, supplied with oxygen produced by algae. Nitrification was the main ammonium removal mechanism within the microalgal-bacterial biomass, followed by algal uptake and nutrient requirements for bacterial growth. Carbon oxidation and denitrification were the main removal mechanisms for organic carbon. Hence, the role of algae within the microalgal-bacterial system is to provide oxygen to support the aerobic processes. The microalgal-bacterial system offers the possibility of reducing the hydraulic retention time, which can decrease the large area requirements often demanded by algal systems.

GENRE
Science & Nature
RELEASED
2018
7 December
LANGUAGE
EN
English
LENGTH
348
Pages
PUBLISHER
CRC Press
SIZE
5.8
MB

Other Books in This Series

Multiple Objective Treatment Aspects of Bank Filtration Multiple Objective Treatment Aspects of Bank Filtration
2023
Grasping the Water, Energy, and Food Security Nexus in the Local Context Grasping the Water, Energy, and Food Security Nexus in the Local Context
2021
Adaptive Disaster Risk Assessment Adaptive Disaster Risk Assessment
2021
Establishing the Environmental Flow Regime for the Middle Zambezi River Establishing the Environmental Flow Regime for the Middle Zambezi River
2021
Simultaneous Sulfate Reduction and Metal Precipitation in an Inverse Fluidized Bed Reactor Simultaneous Sulfate Reduction and Metal Precipitation in an Inverse Fluidized Bed Reactor
2022
Bioreduction of Selenite and Tellurite by Phanerochaete Chrysosporium Bioreduction of Selenite and Tellurite by Phanerochaete Chrysosporium
2021