Effect of Pretreatment on Hydraulic Performance of the Integrated Membrane Process for Concentrating Nutrient in Biogas Digestate from Swine Manure.

ABSTRACT: Nanofiltration (NF) or reverse osmosis (RO) process has been widely applied for concentrating nutrient in biogas digestate. However, efficient pretreatment is key to the sustainable operation of NF or RO. In this study, the combination of NF and RO for concentrating biogas digestate was compared using different pretreatments of hollow fiber ultrafiltration membrane (HFUFM) and ceramic membrane (CUFM). Pilot-scale batch tests were conducted (500 L). CUFM showed a higher membrane flux than HFUFM (100 ~ 180 L·(m2·h)-1 vs. 17 ~ 35 L·(m2·h)-1), but they showed little impact on the NF + RO process. Membrane fluxes of NF and RO were 20 ~ 48 L·(m2·h)-1 and 16 ~ 40 L·(m2·h)-1, respectively. In the RO permeates, the removal rates of total suspended solids (TSS), total solids (TS), chemical oxygen de

SUBMITTER: Zhan Y 

PROVIDER: S-EPMC7597954 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature