TY - JOUR
T1 - Zeolite-amended microalgal-bacterial system in a membrane photobioreactor for promoting system stability, biomass production, and wastewater treatment efficiency to realize Environmental-Enhancing Energy paradigm
AU - Wang, Mengzi
AU - Schideman, Lance
AU - Lu, Haifeng
AU - Zhang, Yuanhui
AU - Li, Baoming
AU - Cao, Wei
N1 - Publisher Copyright:
© 2018, Springer Science+Business Media B.V., part of Springer Nature.
PY - 2019/2/1
Y1 - 2019/2/1
N2 - Efficiently producing biomass through microalgal-bacterial system (MBS) by using hydrothermal liquefaction wastewater (HTLWW) is a critical step to realize Environmental-Enhancing Energy (E 2 -Energy) paradigm. However, the toxicity and instability of HTLWW reduce biomass accumulation and further limit biocrude oil production. Here, zeolites were applied to investigate their role in improving MBS performance, which was challenged by four shock loadings, in a membrane photobioreactor (MPBR). Results demonstrated that zeolites effectively improved ammonium (NH 4 + ) removal in both short and long term. After adding zeolites in 2# shock loading phase, NH 4 + removal quickly increased to 99.5% in 9 days, which was higher compared with that after 1# shock loading (increase to 86.1% in 43 days). Even after zeolites were removed, it only took 5 days to remove 89.3% of NH 4 + after 4# shock loading. Zeolites also promoted the total suspended biomass (TSB), especially the microalgae, from the negative effect of shock loadings. Contrast to 1# and 4# shock loading phases, shorter reduction time of chlorophyll (a + b) was observed after 2# and 3# shock loading with zeolites. With zeolite, the average chlorophyll (a + b) and TSB were 35.2 and 1577.2 mg L −1 , which respectively increased by 67.2 and 34.2% compared with those in the phases without zeolites. Zeolites act as adsorbents relieving the NH 4 + concentration and provide favorite habitats to form biofilms, which promote the tolerance of microorganisms to the high HTLWW concentrations and increased the biomass production. Adding zeolite is one suggested way to promote MBS stability, pollutant removal, and biomass production.
AB - Efficiently producing biomass through microalgal-bacterial system (MBS) by using hydrothermal liquefaction wastewater (HTLWW) is a critical step to realize Environmental-Enhancing Energy (E 2 -Energy) paradigm. However, the toxicity and instability of HTLWW reduce biomass accumulation and further limit biocrude oil production. Here, zeolites were applied to investigate their role in improving MBS performance, which was challenged by four shock loadings, in a membrane photobioreactor (MPBR). Results demonstrated that zeolites effectively improved ammonium (NH 4 + ) removal in both short and long term. After adding zeolites in 2# shock loading phase, NH 4 + removal quickly increased to 99.5% in 9 days, which was higher compared with that after 1# shock loading (increase to 86.1% in 43 days). Even after zeolites were removed, it only took 5 days to remove 89.3% of NH 4 + after 4# shock loading. Zeolites also promoted the total suspended biomass (TSB), especially the microalgae, from the negative effect of shock loadings. Contrast to 1# and 4# shock loading phases, shorter reduction time of chlorophyll (a + b) was observed after 2# and 3# shock loading with zeolites. With zeolite, the average chlorophyll (a + b) and TSB were 35.2 and 1577.2 mg L −1 , which respectively increased by 67.2 and 34.2% compared with those in the phases without zeolites. Zeolites act as adsorbents relieving the NH 4 + concentration and provide favorite habitats to form biofilms, which promote the tolerance of microorganisms to the high HTLWW concentrations and increased the biomass production. Adding zeolite is one suggested way to promote MBS stability, pollutant removal, and biomass production.
KW - Hydrothermal liquefaction wastewater
KW - Membrane photobioreactor
KW - Microalgal-bacterial system
KW - Shock loading
KW - Zeolite
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U2 - 10.1007/s10811-018-1505-3
DO - 10.1007/s10811-018-1505-3
M3 - Article
AN - SCOPUS:85046721571
SN - 0921-8971
VL - 31
SP - 335
EP - 344
JO - Journal of Applied Phycology
JF - Journal of Applied Phycology
IS - 1
ER -