Sequencing Batch Reactor

Powerful Essays
COMPARISON OF SBR AND CONTINUOUS FLOW ACTIVATED SLUDGE FOR NUTRIENT REMOVAL
Alvin C. Firmin CDM Jefferson Mill, 670 North Commercial Street Suite 201 Manchester, New Hampshire 03101

ABSTRACT Sequencing batch reactors (SBR) are a flexible configuration of the activated sludge process, capable of providing low effluent nutrient levels. The SBR is fundamentally the same as any other variation of the activated sludge process, except that it operates in a batch draw and fill mode. The nuances of a batch operation must be understood and applied. This paper presents design considerations unique to the SBR and a design comparison of a continuous flow system and SBR, demonstrating that the total volume in a SBR system is not less than a comparably sized continuous flow system and that the total number of diffusers and installed blower horsepower is greater for the SBR system. KEYWORDS

Sequencing batch reactor, SBR, activated sludge, aeration
INTRODUCTION Sequencing batch reactors (SBR) have become a popular means of providing activated sludge treatment. With proper design and configuration, SBRs will provide very low effluent nutrient levels. The SBR is fundamentally the same as any other variation of activated sludge—the same concepts, design procedures, and biological kinetics are applicable. However, the batch operation of the process and impacts on design aspects must be understood and correctly applied to achieve optimum results. In particular, the batch operation has a significant impact on sizing of the aeration system. This paper presents a sizing comparison between conventional flow activated sludge and a SBR system with varying numbers of reactors, demonstrating the impact of the number of reactors on the sizing of the aeration system. The paper also discusses the impacts of alkalinity control, decanting, the necessity of scum removal and advantages of the SBR compared to continuous flow systems. SEQUENCING BATCH REACTOR – DESCRIPTION AND DESIGN SBRs are



References: EPA 932-F-99-073 (Sept 1999) Wastewater Technology Fact Sheet, Sequencing Batch Reactors Wilderer, Irvine, and Goronszy; Sequencing Batch Reactor Technology; Scientific and Technical Report No. 10, IWA Publishing.

You May Also Find These Documents Helpful

  • Satisfactory Essays

    of Sanger Sequencing and Illumina Sequencing Technique In similarities, Illumina or NGS (Next Generation Sequencing) is principle based similar to Sanger Sequencing. Re-synthesizing the bases of DNA small fragment from a DNA template strand that is identified from the emitted signal. But unlike Sanger Sequencing, Illumina NGS sequencing further the process in a huge parallel fashion across millions of action instead of being limited single of a few DNA fragment like Sanger Sequencing. Sanger Sequencing…

    • 288 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    Dna Sequencing

    • 2552 Words
    • 11 Pages

    DNA sequencing From Wikipedia, the free encyclopedia [pic] The term DNA sequencing refers to sequencing methods for determining the order of the nucleotide bases—adenine, guanine, cytosine, and thymine—in a molecule of DNA. Knowledge of DNA sequences has become indispensable for basic biological research, other research branches utilizing DNA sequencing, and in numerous applied fields such as diagnostic, biotechnology, forensic biology and biologicalsystematics. The advent of DNA sequencing…

    • 2552 Words
    • 11 Pages
    Powerful Essays
  • Better Essays

    The reactor

    • 1916 Words
    • 8 Pages

    References: Wankat, P., Equilibrium Staged Separation Processes, Prentice Hall, Upper Saddle River, NJ, (1988) Harriot, P., Chemical reactor design, Marcel Dekker, Incorporated, USA (2002). Nexant ChemSystems Reports, Maleic anhydride process evaluation (2005). Yang, W-C., Handbook of fluidization and fluid particle systems, Marcel Dekker, USA (2003). Articles from www.scrib.com/maleic…

    • 1916 Words
    • 8 Pages
    Better Essays
  • Good Essays

    Chemical Reactors

    • 448 Words
    • 2 Pages

    Batch Reactor Aim/Objective The aim of this experiment is to compare the theoretical conversion for a saponification reaction to the experimentally determined conversion in a batch reactor under constant temperature conditions. Experimental Procedure The first step was to ensure the electrical supply to the rig was turned off and that the Armfield batch reactor was empty and clean. 500mL of 0.1M sodium hydroxide solution was then added manually. The pump and stirrer were then set to…

    • 448 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    DNA Sequencing

    • 365 Words
    • 2 Pages

    seeking to understand this process, began with the work of Gregor Mendel in the mid-19th century. DNA SEQUENCING DNA sequencing is the process of determining the precise order of nucleotides within a DNA molecule. It includes any method or technology that is used to determine the order of the four bases—adenine, guanine, cytosine, and thymine—in a strand of DNA. The advent of rapid DNA sequencing methods has greatly accelerated biological and medical research and discovery. Knowledge of DNA sequences…

    • 365 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    DNA Sequencing

    • 3008 Words
    • 8 Pages

    Engineering: BS941 Assignment title “DNA sequencing: where we are and where it’s going” Student Number 1464986 Word Count 2310 The article focuses on the advances achieved in DNA sequencing by first providing a brief background on DNA, and how it was initially sequenced. The paper then takes into consideration four of the major DNA sequencing techniques. These include: Sanger’s Chain Termination Method, Pyrosequencing, Single Molecule Real-Time Sequencing and Nanopore Technology. Finally, recent…

    • 3008 Words
    • 8 Pages
    Powerful Essays
  • Satisfactory Essays

    Sequencing Objectives

    • 368 Words
    • 2 Pages

    Sequencing objectives within classes and courses within curriculum is important because much of what we learn is developed through building blocks of knowledge. For example, in my current field, one must know medical terminology and anatomy and physiology in order to begin a coding class. If one does not know where the pyriform sinus is in the human body, one cannot assign "history of pyriform sinus cancer" the correct V-code. One would assume that since the word "sinus" is in the phrase, the…

    • 368 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    DNA sequencing

    • 267 Words
    • 2 Pages

    DNA Sequencing As of last few weeks, the transformation lab is performed to convey and purify a given protein. However after further research scientists found out that Transformation is not only used to purify protein but also to find out contents that are stored in a given plasmid. The objective of the lab that is to be performed involves a procedure that determines the identity of an unknown gene replicated in a plasmid. To begin this procedure two to four colonies of bacteria is added to two…

    • 267 Words
    • 2 Pages
    Satisfactory Essays
  • Better Essays

    Batch Costing

    • 4338 Words
    • 18 Pages

    REVIEW OF THE LITERATURE BATCH COSTING INTRODUCTION Historically, because of the industrial background of cost accounting, specific order costing has tended to centre around the manufacturing environment. Given the developments both in cost accounting and performance evaluation over the last 20 years or so, cost accounting is now being applied in manufacturing, non manufacturing , service and even in non profit making organizations. Cost Accounting is usually considered only as it applies to…

    • 4338 Words
    • 18 Pages
    Better Essays
  • Better Essays

    nuclear reactors

    • 1873 Words
    • 5 Pages

    NUCLEAR REACTORS A nuclear reactor is a device to initiate and control a sustained nuclear chain reaction. Nuclear reactors are used at nuclear power plants for electricity generation and in propulsion of ships. Heat from nuclear fission is passed to a working fluid (water or gas), which runs through turbines. These either drive a ship's propellers or turn electrical generators. Nuclear generated steam in principle can be used for industrial process heat or for district heating. Some reactors are used…

    • 1873 Words
    • 5 Pages
    Better Essays