Integration of ozone with co-immobilized microalgae-activated sludge bacterial symbiosis for efficient on-site treatment of meat processing wastewater

Hu, Xinjuan; Meneses, Yulie E.; Stratton, Jayne; Lau, Soon Kiat; Subbiah, Jeyamkondan

doi:10.1016/j.jenvman.2021.112152

Cited by 12 publications

(4 citation statements)

References 24 publications

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“…Currently, microalgal immobilization is usually associated with a photobioreactor for treating wastewater. For instance, to relieve the stress of severe loading and a low wastewater treatment efficiency caused by the direct discharge of high-concentration meat processing wastewater into a municipal sewage system, integration of an ozone pretreatment with co-immobilized microalgae-activated sludge bacterial symbiosis significantly improved biodegradability, achieving efficient on-site treatment of MPW, with 25.7% sCOD, 16.1% TN, and 14.3% TP increased in removal efficiency [ 130 ]. Zamalloa et al.…”

Section: Can An Immobilized Microalgal System Be Applied In Real Wast...mentioning

confidence: 99%

Immobilized microalgal system: An achievable idea for upgrading current microalgal wastewater treatment

Han¹,

Zhang²,

Ho³

2023

Environmental Science and Ecotechnology

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Section: Can An Immobilized Microalgal System Be Applied In Real Wast...mentioning

confidence: 99%

Immobilized microalgal system: An achievable idea for upgrading current microalgal wastewater treatment

Han¹,

Zhang²,

Ho³

2023

Environmental Science and Ecotechnology

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“…BAC alone preferentially degrades biodegradable fractions such as small molecular acids, ketones, alcohols, and halogen-containing compounds but rarely degrades fluorophores, whereas ozonation is capable to transfer hydrophobic or hydrophilic protein-like fluorophores to less fluorescent transformation products that are more susceptible to biodegradation via BAC treatment, which explains the superior performance of the O 3 -BAC combination system. Hu et al ( 2021 ) integrated ozone with co-immobilised microalgae-activated sludge bacterial biodegradation to remove organic compounds in meat processing wastewater and reported that bacterial growth was encouraged in ozone-pretreated wastewater (7.1–8.1 log CFU/mL) compared with the non-pretreated control (6.0 log CFU/mL). This was found to be due to the enhanced biodegradability of contaminants in the same way as algal biomass growth; following pre-treatment with a favourable concentration of ozone, the soluble chemical oxygen demand achieved a removal rate of 60.1% by microalgal biotreatment, while it is only 34.4% in control (non-ozonated wastewater), confirming the synergistic effects of these two technologies (Hu et al 2021 ).…”

Section: Advanced Oxidationmentioning

confidence: 99%

“…Hu et al ( 2021 ) integrated ozone with co-immobilised microalgae-activated sludge bacterial biodegradation to remove organic compounds in meat processing wastewater and reported that bacterial growth was encouraged in ozone-pretreated wastewater (7.1–8.1 log CFU/mL) compared with the non-pretreated control (6.0 log CFU/mL). This was found to be due to the enhanced biodegradability of contaminants in the same way as algal biomass growth; following pre-treatment with a favourable concentration of ozone, the soluble chemical oxygen demand achieved a removal rate of 60.1% by microalgal biotreatment, while it is only 34.4% in control (non-ozonated wastewater), confirming the synergistic effects of these two technologies (Hu et al 2021 ). Nonetheless, the removal rate remains restricted and dissatisfactory; thus, it is of great need to investigate whether bulk nanobubbles, which are beneficial to individual ozonation or biological treatment methods, can facilitate hybrid treatment efficiency.…”

Section: Advanced Oxidationmentioning

confidence: 99%

Role of bulk nanobubbles in removing organic pollutants in wastewater treatment

Zhang

Cen

et al. 2021

AMB Expr

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The occurrence of a variety of organic pollutants has complicated wastewater treatment; thus, the search for sustainable and effective treatment technology has drawn significant attention. In recent years, bulk nanobubbles, which have extraordinary properties differing from those of microbubbles, including high stability and long residence times in water, large specific surface areas, high gas transfer efficiency and interface potential, and the capability to generate free radicals, have shown attractive technological advantages and promising application prospects for wastewater treatment. In this review, the basic characteristics of bulk nanobubbles are summarized in detail, and recent findings related to their implementation pathways and mechanisms in organic wastewater treatment are systematically discussed, which includes improving the air flotation process, increasing water aeration to promote aerobic biological technologies including biological activated carbon, activated sludge, and membrane bioreactors, and generating active free radicals that oxidise organic compounds. Finally, the current technological difficulties of bulk nanobubbles are analysed, and future focus areas for research on bulk nanobubble technology are also proposed.

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“…Eventual liquid products of dark fermentation can be bioresource for cosmetics and chemistry (low organic acids) [13] or fertilizers [14]. Some anaerobic digestion works applied protein-rich substrates like leathers or meat [2,15,16].…”

Section: Introductionmentioning

confidence: 99%

Microbial Biogas Production From Pork Gelatine.

Sołowski

2021

Preprint

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Dark fermentation of collagen (gelatine) results are shown in this research. The concentrations of applied gelatine were of VSS (volatile suspended solids) from 10 g VSS/L to 30 g VSS/L. The initial process pH was 5.5, depending on concentration reached pH values from 7.5 to 7.8 after 55 days. Although inoculum was heat-shocked in the case of 30 g VSS/L of collagen the process was hydrogenotrophic anaerobic digestion. In collagen concentration below 30 g VSS/L, hydrogen production was dominant only in the first 5 days of experiments. Then there also changed from dark fermentation into hydrogenotrophic methane production. In the case of optimal biogas production was due to accumulative production for a concentration of collagen 20 g VSS/L: 147.2 mL of hydrogen and 57.23 L of methane. In the case of optimal biogas production was due to accumulative production for a concentration of collagen 20 g VSS/L: 147.2 mL of hydrogen and 57.23 L of methane. The optimal hydrogen and methane yields were for concentration 10 g VSS/L (7.65 mL H2 /g VSS, and 3.49 L CH4/ g VSS). In 10 g VSS/L was also the lowest accumulated emission of hydrogen sulphide (10.3 mL of H2S), while the lowest yield was for 30 g VSS/L (0.44 mL H2S /g VSS). After a lag time, the hydrogen production and hydrogen sulphide grew with a specific ratio depending on concentration. Collagen, a protein with known amounts of sulphur allowed determining the origin of hydrogen sulphide in biogas. The hydrogen sulphide emission and sulphur added analysis proved that hydrogen sulphide origins in biogas from bacteria remains more than from substrate.

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Integration of ozone with co-immobilized microalgae-activated sludge bacterial symbiosis for efficient on-site treatment of meat processing wastewater

Cited by 12 publications

References 24 publications

Immobilized microalgal system: An achievable idea for upgrading current microalgal wastewater treatment

Immobilized microalgal system: An achievable idea for upgrading current microalgal wastewater treatment

Role of bulk nanobubbles in removing organic pollutants in wastewater treatment

Microbial Biogas Production From Pork Gelatine.

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