Evaluating and Optimizing Source Treatment Technologies to Improve the Biodegradability of Organic Compounds ( WERF Research Report Series )

Publication series :WERF Research Report Series

Author: M. D. Gurol  

Publisher: IWA Publishing‎

Publication year: 2004

E-ISBN: 9781780404301

Subject: X703 Wastewater treatment and reuse

Keyword: 工业技术

Language: ENG

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Evaluating and Optimizing Source Treatment Technologies to Improve the Biodegradability of Organic Compounds

Description

The main objective of this research was to investigate the capabilities of three chemical oxidation processes as pretreatment technologies with the goal of making wastewaters containing persistent organic compounds amenable to biotreatment. The processes investigated are ozonation, ultraviolet radiation/ hydrogen peroxide (UV/H2O2) and Fenton reaction. The studies were focused on two organic compounds: Dichloro diethyl ether (DCDE) and methyl tertiary butyl ether (MTBE). Synthetic solutions, and a real groundwater and an industrial wastewater were used for experimentation. The experimental method involved oxidation of solutions of the target organic compounds at various percentages by the three oxidation processes. The pre-oxidized solutions of the organic compounds were subjected to biodegradation and toxicity studies. Four different respirometric tests (two Short-term, one Mid-term, and one Long-term) and a bench scale Sequencing Batch Reactor (SBR) test were used for full assessment of the effectiveness of the chemical oxidation processes. Activated sludge,  as acclimated and non-acclimated to the organic compounds, was used as the test culture.

Chapter

FinalChapter1web.pdf

Introduction

FinalChapter2web.pdf

Objectives and Experimental Methods

Figure 2.1. Experimental Setup for Ozonation.

Figure 2-4. Schematic of Experimental Setup for Mid-Term Bio

Table 2-1. Syntho Solution Constituents1.

Carbon Source (mg/L)

Nitrogen Source

Sewage Simulation

Replaced with

Replaced with

A

Table 2-2. List of Chemicals Used in this Research.

Chemical

C4H8OCl2

FinalChapter3web.pdf

Ozonation of DCDE was performed under the experimental condi

Figure 3-5. Influent and Effluent Ozone Gas Concentrations D

Figure 3-6. Ozone Concentration in Water During DCDE Oxidati

Figure 3-9. Removal of MTBE by Ozonation and Stripping.

Figure 3-10. Ozone Influent and Effluent Gas Concentration D

Table 3-1: Fenton Treatment of DCDE for Various Reagent Dosa

Table 3-2. Comparison of Results with Ferric Sulfate and Fer

Fe(III)/H2O2 : 28 mM/28 mM (Ratio: 1/1)

DCDEo, mM

Figure 3-21. Oxidation By-Products of DCDE by Ozone. (Initia

Figure 3-23. Oxidation By-Products of DCDE of Fenton Treatme

Dechlorination, %

Figure 3-25. Dechlorination of DCDE During Its Oxidation.

FinalChapter4web.pdf

Assessment of Biodegradation for DCDE

FinalChapter5web.pdf

Assessment of Biodegradation of MTBE

5.2.3 UV/H2O2 Treated MTBE

FinalChapter7web.pdf

Control Reactor

Reactor with Oxidized Chemical

Experiment No.

Chemical

Oxidative

Treatment

Total COD Input

Waste Volume

Oxidation Percentage

TOC Contribution

COD Contribution

Test

Oxidation Technique

Oxidation Percentage (%)

By-product Biodegradation Range (%)

Test

Oxidation Technique

Target

Oxidation Percentage (%)

Actual Oxidation Percentage

By-Product Biodegradation Based on COD (%)

By-Product Biodegradation Based on TOC (%)

FinalChapter8web.pdf

8.1 MTBE-Containing Groundwater

FinalRefsweb.pdf

References

Lunar, L., D. Sicilia, S. Rubio, D. Perez-Bendito, and U. Ni

Walling, C. and M. Clearly (1977) Oxygen evaluation as a cri

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