Please use this identifier to cite or link to this item: http://hdl.handle.net/10790/7302

Integrating an anaerobic Bio-nest and an aerobic EMMC process as pretreatment of dairy wastewater for reuse: a pilot plant study

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Title:Integrating an anaerobic Bio-nest and an aerobic EMMC process as pretreatment of dairy wastewater for reuse: a pilot plant study
Authors:Kongsil, Piyalerg
Irvine, Joshua Lelemia
Yang, P. Y.
Keywords:Anaerobic Bio-nest
Biogas
Dairy wastewater
Entrapped mixed microbial cell
Existing lagoon
Date Issued:02 Apr 2009
Publisher:Springer Link
Citation:Kongsil, P., Irvine, J.L. & Yang, P.Y. Integrating an anaerobic Bio-nest and an aerobic EMMC process as pretreatment of dairy wastewater for reuse: a pilot plant study. Clean Techn Environ Policy 12, 301–311 (2010). https://doi.org/10.1007/s10098-009-0211-x
Relation:https://doi.org/10.1007/s10098-009-0211-x
Abstract:A large dairy farm located on the island of Oahu, Hawaii was the site for an investigation for the potential integration of the existing facultative lagoon system with a cost effective pretreatment unit process. Based on the results from a laboratory study, a pilot plant was installed with two anaerobic bioreactors (10 m 3 each) and one aerobic reactor (3.8 m 3 ). Two layers of media ‘‘Bio-nest,’’ providing a void volume of 98%, were placed into each anaerobic bioreactor with 19% space-based on the bioreactor water volume. For better performance and reduction of shock-load, the equalization/settling tank was employed prior to the first anaerobic Bio-nest reactor. The intermediate holding tank settled effluent suspended solids from the Bio-nest reactor and adjusted the loading rate in order to improve the performance of the aerobic EMMC (entrapped mixed microbial cell) bioreactors. Based on the start-up operation of the Bio-nest system at an organic loading rate of about 1.5 g TCOD/l/day, the production rate of biogas from the first and second Bio-nest reactors was 0.64 and 0.15 l/l/day, respectively. This indicates that the anaerobic degradation of organics occurs mainly in the first Bio-nest reactor due to the low loading rate. The removal efficiency from the Bio-nest system shows TCOD removal of about 70%. The EMMC process provided further treatment to achieve a removal efficiency of TCOD at about 50% and a TN of about 35%. The cost for these pretreatments in order to be integrated with the existing lagoon system is US $1.1 per 1,000 gallons (3.8 m3 ) for dairy wastewater and $91 for each ton of TCOD removal. This integration system provides a sustainable improvement of environment and agricultural production.
Pages/Duration:11 pages
URI:http://hdl.handle.net/10790/7302
DOI:10.1007/s10098-009-0211-x
Rights:Attribution-NonCommercial-NoDerivs 3.0 United States
http://creativecommons.org/licenses/by-nc-nd/3.0/us/
Journal:Clean Technologies and Environmental Policy
Volume:12
Appears in Collections: Irvine, Joshua Lelemia


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