A comparative study of the influence of salt concentration on the performance of an osmotic membrane bioreactor and a sequencing batch reactor

Soler–Cabezas, J.L.; Luján-Facundo, M.J.; Mendoza–Roca, J.A.; Vincent‐Vela, María‐Cinta; Pastor-Alcañiz, Laura

doi:10.1002/jctb.5321

Cited by 5 publications

(3 citation statements)

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“…Another recent study using MBRs for the treatment of TOPW was carried out by Soler-Cabezas et al (2017). The main drawback reported in this study was the high salinity of the TOPW, which was finally eliminated, causing an increase in salinity in the reactor.…”

Section: Table Olive Processing Wastewater Treatmentsmentioning

confidence: 87%

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Table Olive Wastewater: Problem, Treatments and Future Strategy. A Review

et al. 2018

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The table olive industry produces a high quantity of wastewater annually. These wastewaters are very problematic because of their characteristics of high organic matter, high phenolic content, high salinity and conductivity. The quantities in which they are produced are also a serious problem. The worldwide production of table olives reached 2,550,000 tons in the last five campaigns, with the European Union contributing to 32% of total production. The problem of these wastewaters is focused on the Mediterranean area where the highest quantity of table olives is produced and to a lesser extent on the United States and South America. Countries like Spain produce around 540,000 tons of these wastewaters. At present, there is no standard treatment for these wastewaters with acceptable results and which is applied in the industry. Currently, the most common treatment is the storage of these wastewaters in large evaporation ponds where, during the dry season, the wastewater disappears due to evaporation. This is not a solution as the evaporation ponds depend completely on the climatology and have a high number of associated problems, such as bad odors, insect proliferation and the contamination of underground aquifers. Different studies have been carried out on table olive wastewater treatment, but the reality is that at the industrial level, none has been successfully applied. New and promising treatments are needed. The current review analyzes the situation of table olive wastewater treatment and the promising technologies for the future.

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Section: Table Olive Processing Wastewater Treatmentsmentioning

confidence: 87%

“…Soler-Cabezas et al (2017) also applied the SBR technology to purify TOPW, finding that this system was able to reduce 80% COD and 76% total phenol concentration. The main problem was that TOPW salinity increased the reactor’s conductivity over time.…”

Section: Table Olive Processing Wastewater Treatmentsmentioning

confidence: 99%

Table Olive Wastewater: Problem, Treatments and Future Strategy. A Review

et al. 2018

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“…It was found that the movement of electrons (electrically driven) could affect ion transport across FO membrane. Compared to the open circuit (no electricity generation), a closed circuit mode can facilitate the forward transport of cations (from the anode to the cathode) in the OsMFC due to the electrons moving from the anode electrode to the cathode electrode, resulting in decreased reverse cation diffusion; this decreased cation transport would repel the reversed anions transport for charge balance, leading to the reduction of RSF . Prior studies have screened for appropriate DS for FO applications and studied 14 DS selected from more than 500 inorganic compounds .…”

Section: Introductionmentioning

confidence: 99%

Examination of inorganic‐based draw solutes and mitigation of their reverse solute flux in osmotic microbial fuel cells

Qian

2018

J of Chemical Tech & Biotech

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BACKGROUND: Osmotic microbial fuel cells (OsMFCs) integrate microbial fuel cell (MFC) and forward osmosis (FO) and can simultaneously achieve wastewater treatment, electricity generation and water recovery. The selection of appropriate draw solutes (DS) and reduction of reverse solute flux (RSF) are the key challenges for OsMFC operation. This study has examined ten inorganic-based DS and investigated the effect of electricity generation on the RSF. RESULTS: The OsMFC exhibited stable electricity generation with Na + -series and K + -series DS. For NH 4+ -series DS, the ammonia-nitrogen loss percentage, which varied from 12.5 ± 0.4% to 47.7 ± 2.4%, was significant due to the high pH and aeration in the cathode. Inorganic scaling/precipitation was observed with Mg 2+ -series and Ca 2+ -series DS with DS loss percentage from 13.5 ± 2.8% to 28.0 ± 0.3%. Electricity generation could reduce the specific RSF by 70.3 ± 4.9% and 56.7 ± 13.4% for the Na + and K + DS, respectively. CONCLUSION: The Na + -series and K + -series DS was identified as the ideal DS for the OsMFC because of stable electricity generation and water flux and significant RSF reduction. NH 4 + -series, Mg 2+ -series and Ca 2+ -series DS were not appropriate due to significant loss. Bioelectricity generation could reduce both RSF and specific RSF. Industry NH 4 HCO 3 DS increased from 1.76 ± 0.11 to 3.83 ± 0.06 g m −2 h −1 and from 1.67 ± 0.08 to 3.38 ± 0.20 g m −2 h −1 with the NH 4 Cl DS, resulting in NH 4 + concentrations in the anolyte increasing

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