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

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

      DOI link for 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 book

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

      DOI link for 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 book

      ByAngélica Rada Ariza
      Edition 1st Edition
      First Published 2018
      eBook Published 4 January 2019
      Pub. Location London
      Imprint CRC Press
      DOI https://doi.org/10.1201/9780429058257
      Pages 348
      eBook ISBN 9780429058257
      Subjects Earth Sciences, Engineering & Technology
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      Ariza, A.R. (2018). Photo-Activated Sludge: A Novel Algal-Bacterial Biotreatment for Nitrogen Removal from Wastewater (1st ed.). CRC Press. https://doi.org/10.1201/9780429058257

      ABSTRACT

      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.

      TABLE OF CONTENTS

      chapter 1|11 pages

      General Introduction

      chapter 2|25 pages

      Microalgal-Bacterial Consortia for Wastewater Treatment: A Review

      chapter 3|29 pages

      Nitrification by Microalgal-Bacterial Consortia for Ammonium Removal in a Flat Panel Sequencing Photobioreactor

      chapter chapter4|34 pages

      Ammonium Removal Mechanisms in a Microalgal-Bacterial Sequencing-Batch Photobioreactor at Different SRT

      chapter 5|26 pages

      Modelling of Nitrogen Removal Using a Microalgal-Bacterial Consortium

      chapter chapter6|43 pages

      Modelling of Nitrogen Removal Using a Microalgal-Bacterial Consortium Under Different SRTs

      chapter 7|38 pages

      Respirometric Tests for Microalgal-Bacterial Biomass: Modelling of Nitrogen Storage by Microalgae

      chapter chapter8|20 pages

      Conclusions and Recommendations

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