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57 DEVELOPMENT OF A LAND LIMITED BIOLOGICAL PRE-TREATMENT PROCESS FOR HOSPITAL AND FOOD PROCESSING WASTEWATER Yi-Chang Lin, Associate Professor Jin-Huei Hsu, Research Associate and Doctoral Student School of Public Health, National Taiwan University Taipei, Taiwan, Republic of China T. Ma, Graduate Research Assistant P. Y. Yang, Professor Department of Biosystems Engineering University of Hawaii at Manoa Honolulu, Hawaii 96822 INTRODUCTION The rapid growth of population and agro-industry in Taiwan and the state of Hawaii has been very obvious in the past decade. Consequently, both domestic and agro-industrial wastewater have been considered as the two major sources of water pollution problems. Because of the social and economic requirements, both the hospitals and food processing plants need to be located in the populated city or near the urban areas. Thus, the related wastewater treatment alternatives have some limitations; such as, limited land, less capital, shortage of labor, concerns regarding odor, and overload of existing domestic sewer systems. The pre-treatment alternatives for reducing the organic load of the existing domestic sewer system require an effective treatment process which can provide the following merits: • less land requirement • less starting up period • simple to operate and maintain • less sludge production • no odor or less odor problems • easy to be prefabricated Although some physical/chemical pre-treatment alternatives may provide the above merits, the cost is one of the main concerns of using physical/chemical pre-treatment. Therefore, the entrapped- mixed-microbial cell (EMMC) process was selected as a biological treatment alternative in order to meet the above merits. The EMMC process is a comparatively new technology in the field of water and wastewater treatment. Entrapment is accomplished by using porous or fibrous material to confine the migration of organisms. It is expected that the EMMC process will provide higher SRT's (Solid Retention Time), eliminate external sludge recycling and prevent bulking/rising sludge that occurs in the conventional activated sludge process. Removal of organic and inorganic compounds using the entrapping technology for pure culture was investigated previously.1"10 Also, the entrapping technology of using mixed culture for entrapment of wastewater treatment was investigated.""17 Among these studies, various types of polymers were used for the cell entrapping carrier. In general, the biological removal efficiency was high. Advantages and disadvantages of using these microbial cell technologies for wastewater treatment were presented and discussed in the above previous studies. Based on the experiments using entrapped mixed culture of microbial cells for biological wastewater treatment at the University of Hawaii,12"17 it was found that cellulose triacetate could provide the necessary mechanical strength and durability under both the aerobic and anaerobic conditions in treating the synthetic wastewater. Therefore, it is necessary that the technology be further investigated for actual wastewater as substrate in order to evaluate its feasibility for application in land limited conditions. This paper reports the results of applying the cell entrapment technology by using both synthetic and actual organic wastewater as substrate and evaluation of its potential for serving as a pretreatment method for achieving the domestic sewer discharge standard. 49th Purdue Industrial Waste Conference Proceedings, 1994 Lewis Publishers, Chelsea, Michigan 48118. Printed in U.S.A. 533
Object Description
Purdue Identification Number | ETRIWC199457 |
Title | Development of a land limited biological pre-treatment process for hospital and food processing wastewater |
Author |
Lin, Yi-Chang Hsu, Jin-Huei Ma, T. Yang, P. Y. (Ping-Yi) |
Date of Original | 1994 |
Conference Title | Proceedings of the 49th Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://e-archives.lib.purdue.edu/u?/engext,44602 |
Extent of Original | p. 533-542 |
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 | 2009-12-10 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 533 |
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 | 57 DEVELOPMENT OF A LAND LIMITED BIOLOGICAL PRE-TREATMENT PROCESS FOR HOSPITAL AND FOOD PROCESSING WASTEWATER Yi-Chang Lin, Associate Professor Jin-Huei Hsu, Research Associate and Doctoral Student School of Public Health, National Taiwan University Taipei, Taiwan, Republic of China T. Ma, Graduate Research Assistant P. Y. Yang, Professor Department of Biosystems Engineering University of Hawaii at Manoa Honolulu, Hawaii 96822 INTRODUCTION The rapid growth of population and agro-industry in Taiwan and the state of Hawaii has been very obvious in the past decade. Consequently, both domestic and agro-industrial wastewater have been considered as the two major sources of water pollution problems. Because of the social and economic requirements, both the hospitals and food processing plants need to be located in the populated city or near the urban areas. Thus, the related wastewater treatment alternatives have some limitations; such as, limited land, less capital, shortage of labor, concerns regarding odor, and overload of existing domestic sewer systems. The pre-treatment alternatives for reducing the organic load of the existing domestic sewer system require an effective treatment process which can provide the following merits: • less land requirement • less starting up period • simple to operate and maintain • less sludge production • no odor or less odor problems • easy to be prefabricated Although some physical/chemical pre-treatment alternatives may provide the above merits, the cost is one of the main concerns of using physical/chemical pre-treatment. Therefore, the entrapped- mixed-microbial cell (EMMC) process was selected as a biological treatment alternative in order to meet the above merits. The EMMC process is a comparatively new technology in the field of water and wastewater treatment. Entrapment is accomplished by using porous or fibrous material to confine the migration of organisms. It is expected that the EMMC process will provide higher SRT's (Solid Retention Time), eliminate external sludge recycling and prevent bulking/rising sludge that occurs in the conventional activated sludge process. Removal of organic and inorganic compounds using the entrapping technology for pure culture was investigated previously.1"10 Also, the entrapping technology of using mixed culture for entrapment of wastewater treatment was investigated.""17 Among these studies, various types of polymers were used for the cell entrapping carrier. In general, the biological removal efficiency was high. Advantages and disadvantages of using these microbial cell technologies for wastewater treatment were presented and discussed in the above previous studies. Based on the experiments using entrapped mixed culture of microbial cells for biological wastewater treatment at the University of Hawaii,12"17 it was found that cellulose triacetate could provide the necessary mechanical strength and durability under both the aerobic and anaerobic conditions in treating the synthetic wastewater. Therefore, it is necessary that the technology be further investigated for actual wastewater as substrate in order to evaluate its feasibility for application in land limited conditions. This paper reports the results of applying the cell entrapment technology by using both synthetic and actual organic wastewater as substrate and evaluation of its potential for serving as a pretreatment method for achieving the domestic sewer discharge standard. 49th Purdue Industrial Waste Conference Proceedings, 1994 Lewis Publishers, Chelsea, Michigan 48118. Printed in U.S.A. 533 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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