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Application of EMMC-biobarrel technology for domestic wastewater treatment and reuse

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Title: Application of EMMC-biobarrel technology for domestic wastewater treatment and reuse
Application of entrapped-mixed-microbial-cell-biobarrel technology for domestic wastewater treatment and reuse
Application of AMMC-biobarrel technology for domestic wastewater treatment and reuse
Authors: Zhu, Jia, 1977
Keywords: Sewage -- Purification -- Biological treatment
Water reuse
Issue Date: 2006
Abstract: The entrapped-mixed-microbial-cell-biobarrel (EMMC-biobarrel) processes with both configurations of single-layer and double-layer were investigated for the removal of carbon and nitrogen simultaneously from synthetic-domestic wastewater with a CODIN ratio of 5 under various operational conditions. For the single-layer systems, the carrier was employed at the packing ratios of 10% and 20% based on the bioreactor water volume. In the double-layer system, carriers were separated into two layers which occupied the top and bottom parts of the reactor with an overall packing ratio of 13%. At the organic and nitrogen loading of O.75kg COD/m3/day and 0.16kg NH3-N/m3/day, all these systems achieved more than 96% of SCOD removal and NH3-N removal efficiencies under continuous aeration. The double-layer system achieved about 40% of total nitrogen removal, which was comparable with the single-layer system with packing ratio of 20% but higher than the single-layer system with a packing ratio of 10%. The SRT for the double-layer system and single-layer system with a packing ratio of 20% could be achieved to more than 200 days. Based on the economics analysis, in the achievement of comparable performance, the capital cost for the double-layer configuration was lower than that for the single-layer configuration. Therefore, double layer configuration is recommended for the EMMC-biobarrel process design. EMMC-biobarrel process offers many advantages over the existing wastewater treatment processes including small space requirement, simple operation and maintenance and . improved nitrogen removal. It demonstrates great potential for onsite, small scale/land limited wastewater treatment applications. The installation cost for an EMMC-biobarrel treatment unit with capacity of 400 gallons/day and 1,500 gallons/day are estimated as $4,671 and $10,191, respectively, which are comparable or lower than those for the existing commercial products which also involve the nitrogen removal technology. For small sca1e/land limited application, the total cost requirement is about $0.90 per 1000 gallons for treating settled domestic sewage per day.
Description: Thesis (M.S.)--University of Hawaii at Manoa, 2006.
Includes bibliographical references (leaves 127-132).
xvi, 132 leaves, bound ill. 29 cm
Rights: All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Appears in Collections:M.S. - Bioengineering

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