page 673 |
Previous | 1 of 8 | Next |
|
|
Loading content ...
Section Nine INDUSTRIAL WASTES - B. BREWERY AND DAIRY WASTES 78 TREATMENT OF BREWERY WASTEWATER USING ANAEROBIC FLUIDIZED BED REACTOR IN SINGLE-PHASE AND TWO-PHASE PROCESS G. K. Anderson, Senior Lecturer T. F. Chan, Croucher Foundation Scholar Department of Civil Engineering University of Newcastle Newcastle-upon-Tyne, United Kingdom NE2 7RU INTRODUCTION With the present worldwide outcry to move towards a 'greener' future and the continuous tightening of legislation in relation to industrial waste disposal, anaerobic treatment of industrial wastewater addresses the environmental issue in two aspects. Firstly, anaerobic treatment reduces the amount of organic matter being discharged into the natural environment. Secondly, methane, one of the 'greenhouse' gases can be produced under controlled conditions and can be utilized to provide valuable energy. Therefore, there has been an ongoing effort to improve anaerobic treatment technology in order to achieve higher organic removal efficiency to minimize both capital and operating costs. In addition, there is an incentive to enhance the methane content in the off-gas produced thus lowering the subsequent cost in energy recovery. Moreover, and most important, the process has to demonstrate its stability and reliability during long term operation. Since the first major study of an anaerobic filter,' the fixed-film concept was further developed, one of the results being the introduction of an anaerobic fluidized bed reactor (AFBR) in the early eighties.2 In the AFBR, the support medium for the growth of microorganisms is fluidized by the up- flowing wastewater, which thus provides a large surface area for biomass attachment. This enables a high biomass concentration to be achieved thus reducing reactor size and the cost of reactor construction.3 However, the AFBR has the potential disadvantage of a higher energy requirement due to the high recycling rate necessary to maintain the media in a fluidized state. The second inherent problem, as experienced by many other processes, is the need for uniform flow distribution at the inlet. Over the past ten years, the AFBR has been used to treat a wide range of industrial wastewaters successfully at laboratory to full-scale.4,56 A more fundamental approach towards the improvement of anaerobic treatment technology was that of phase separation, first proposed by Pohland and Ghosh.7 The objective of phase separation is to separate the acid-forming microorganisms and the methane-forming microorganisms into two reactors in series. Since the optimum growth conditions for these two groups of microorganisms are different, consequently the environmental conditions in each reactor may be controlled accordingly. The yield coefficient data indicate that the total reactor volume can be reduced when phase separation is practised.5 Evidence has shown that improvement in treatment efficiency and process stability under shock load can be attained by the two-phase process.8'910 Notable results have been obtained in full-scale applications of the two-phase process.1''I2'13'14 The objectives of this investigation were to study the treatment of wastewater from a brewery using a pilot-scale AFBR. The AFBR was first operated as a single-phase process (SPAFBR) treating the wastewater directly under various superficial up-flow velocities (SUV). In the next stage, the reactor was operated as a methane (second) phase process (MPAFBR) treating post-acidified brewery wastewater. 45th Purdue Industrial Waste Conference Proceedings, © 1991 Lewis Publishers, Inc., Chelsea, Michigan 48118. Printed in U.S.A. 673
Object Description
Purdue Identification Number | ETRIWC199078 |
Title | Treatment of brewery wastewater using anaerobic fluidized bed reactor in single-phase and two-phase process |
Author |
Anderson, G. K. Chan, T. F. |
Date of Original | 1990 |
Conference Title | Proceedings of the 45th Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://e-archives.lib.purdue.edu/u?/engext,41605 |
Extent of Original | p. 673-680 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Date Digitized | 2009-08-20 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 673 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Transcript | Section Nine INDUSTRIAL WASTES - B. BREWERY AND DAIRY WASTES 78 TREATMENT OF BREWERY WASTEWATER USING ANAEROBIC FLUIDIZED BED REACTOR IN SINGLE-PHASE AND TWO-PHASE PROCESS G. K. Anderson, Senior Lecturer T. F. Chan, Croucher Foundation Scholar Department of Civil Engineering University of Newcastle Newcastle-upon-Tyne, United Kingdom NE2 7RU INTRODUCTION With the present worldwide outcry to move towards a 'greener' future and the continuous tightening of legislation in relation to industrial waste disposal, anaerobic treatment of industrial wastewater addresses the environmental issue in two aspects. Firstly, anaerobic treatment reduces the amount of organic matter being discharged into the natural environment. Secondly, methane, one of the 'greenhouse' gases can be produced under controlled conditions and can be utilized to provide valuable energy. Therefore, there has been an ongoing effort to improve anaerobic treatment technology in order to achieve higher organic removal efficiency to minimize both capital and operating costs. In addition, there is an incentive to enhance the methane content in the off-gas produced thus lowering the subsequent cost in energy recovery. Moreover, and most important, the process has to demonstrate its stability and reliability during long term operation. Since the first major study of an anaerobic filter,' the fixed-film concept was further developed, one of the results being the introduction of an anaerobic fluidized bed reactor (AFBR) in the early eighties.2 In the AFBR, the support medium for the growth of microorganisms is fluidized by the up- flowing wastewater, which thus provides a large surface area for biomass attachment. This enables a high biomass concentration to be achieved thus reducing reactor size and the cost of reactor construction.3 However, the AFBR has the potential disadvantage of a higher energy requirement due to the high recycling rate necessary to maintain the media in a fluidized state. The second inherent problem, as experienced by many other processes, is the need for uniform flow distribution at the inlet. Over the past ten years, the AFBR has been used to treat a wide range of industrial wastewaters successfully at laboratory to full-scale.4,56 A more fundamental approach towards the improvement of anaerobic treatment technology was that of phase separation, first proposed by Pohland and Ghosh.7 The objective of phase separation is to separate the acid-forming microorganisms and the methane-forming microorganisms into two reactors in series. Since the optimum growth conditions for these two groups of microorganisms are different, consequently the environmental conditions in each reactor may be controlled accordingly. The yield coefficient data indicate that the total reactor volume can be reduced when phase separation is practised.5 Evidence has shown that improvement in treatment efficiency and process stability under shock load can be attained by the two-phase process.8'910 Notable results have been obtained in full-scale applications of the two-phase process.1''I2'13'14 The objectives of this investigation were to study the treatment of wastewater from a brewery using a pilot-scale AFBR. The AFBR was first operated as a single-phase process (SPAFBR) treating the wastewater directly under various superficial up-flow velocities (SUV). In the next stage, the reactor was operated as a methane (second) phase process (MPAFBR) treating post-acidified brewery wastewater. 45th Purdue Industrial Waste Conference Proceedings, © 1991 Lewis Publishers, Inc., Chelsea, Michigan 48118. Printed in U.S.A. 673 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Tags
Comments
Post a Comment for page 673