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http://dx.doi.org/10.14579/MEMBRANE_JOURNAL.2014.24.2.142

Advanced Treatment of Liquid Fertilizer from Livestock Night Soil Treatment Facility by Membrane Separation Processes  

Kim, Joo-Hye (Dept. of Chemical and Biological Engineering, Jeju National University)
Kim, Seung-Geon (Dept. of Chemical and Biological Engineering, Jeju National University)
Lee, Ho-Won (Dept. of Chemical and Biological Engineering, Jeju National University)
Publication Information
Membrane Journal / v.24, no.2, 2014 , pp. 142-150 More about this Journal
Abstract
This paper is to develop the process suitable for the advanced treatment of liquid fertilizer from the livestock night soil treatment facility (biogas plant). Nanofiltration (NF) and reverse osmosis (RO) process was used, respectively, for the advanced treatment of liquid fertilizer. And membrane bioreactor (MBR) with and without biomedia were tested, respectively, for the pretreatment. It was found that almost T-N of the liquid fertilizer was composed of ammoniacal nitrogen. Transmembrane pressure of MBR with biomedia increased slowly during the operation time, while that of MBR without biomedia increased rapidly at the initial time. But there was no difference observed in the removal efficiencies of COD, T-N, and T-P irrespective of the dosage of biomedia. When the liquid fertilizer was pretreated by MBR with biomedia, the removal efficiencies of COD, T-N, and T-P were 99.8, 86.5%, and 99.8% by NF, and 99.9, 86.8%, and 99.8% by RO, respectively. Compared with the effluent quality standards of the livestock night soil treatment facility, the water quality treated by MBR and NF/RO process met the standard for COD and T-P, but exceeded the permitted standard for T-N. In order to meet the effluent quality standard for T-N, it is necessary to change the MBR operation cycle or to add the secondary treatment by NF/RO.
Keywords
liquid fertilizer; biogas plant; nanofiltration; reverse osmosis; membrane bioreactor;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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