Biological and photocatalytic treatment at pilot plant scale of synthetic coloured wastewater produced in university teaching laboratories

Puentes-Morales, C.; Pedroza-Camacho, Lucas D.; Mateus-Maldonado, Juan F.; Lores-Acosta, J.C.; Pedroza-Cubides, M.C.; Ramirez-Rodríguez, J.; Salcedo-Reyes, Juan Carlos; Díaz-Ariza, Lucía A.; Pedroza-Rodríguez, Aura M.

doi:10.24275/rmiq/ia1997

Cited by 6 publications

(4 citation statements)

References 40 publications

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“…The efficiency of the bioreactors was determined by estimating the removal percentage of COD, BOD 5 and Color, applying Eq. 1, as reported by Puentes-Morales et al, (2021).…”

Section: Feeding and Process Monitoringsupporting

confidence: 63%

Comparison of two leachate treatment systems by use of bioreactors packed with stabilized material of different age

Sánchez-Sánchez¹,

México²,

Aguilar³

et al. 2021

RMIQ

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“…The efficiency of the bioreactors was determined by estimating the removal percentage of COD, BOD 5 and Color, applying Eq. 1, as reported by Puentes-Morales et al, (2021).…”

Section: Feeding and Process Monitoringsupporting

confidence: 63%

Comparison of two leachate treatment systems by use of bioreactors packed with stabilized material of different age

Sánchez-Sánchez¹,

México²,

Aguilar³

et al. 2021

RMIQ

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“…The gas samples were then analyzed for their CH 4 , CO 2 , and N 2 O concentrations, using a gas chromatograph (Shimadzu Clarus 580) with an electron capture detector (ECD) and Biogas 5000 analyzer. The efficiency of the bioreactors was determined by estimating the removal percentage of COD by applying Equation (1), as reported by Morales et al (2021) [19].…”

Section: Sampling and Analysismentioning

confidence: 99%

Performance Comparison between Anaerobic Hybrid Reactor and Anaerobic Continuous Stirred-Tank Reactor for High-Strength Fresh Leachate Treatment

Sutthiprapa,

Towprayoon,

Chiemchaisri

et al. 2024

Pol. J. Environ. Stud.

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This study aimed to examine the performance of an anaerobic hybrid reactor (AHR) and an anaerobic continuous stirred tank reactor (CSTR) for treating high-strength fresh leachate. As the organic loading rate (OLR) was increased in both systems, the pH decreased, with the lowest pH corresponding to an OLR of 25-30 kgCOD/m 3 •d. The AHR system demonstrated instability in total volatile fatty acids when the OLR increased to 20 kgCOD/m 3 •d. The highest methane (CH4) content was achieved when the OLR was 15 kgCOD/m 3 •d. Moreover, the AHR showed excellent sediment retention. When the OLR increased, volatile suspended solids (VSS) in the system increased. The CH 4 content tended to increase as the OLR increased up to 20 kgCOD/m 3 •d. The highest CH 4 content in the AHR was 68%, which was higher than that of the CSTR. The CSTR could not produce biogas when the OLR was 20 kgCOD/m 3 •d. The optimal OLR for the operation of AHR and CSTR treating fresh leachate was found to be 15 and 10 kgCOD/m 3 •d respectively.

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“…The air (non-sterile) supply was with air pumps at a rate of 1.0 L min −1 . Once the WW was homogenised and aerated for 10 min, initial sampling was performed every 24 h until 96 h. At the end of the hydraulic retention time in the biological reactor, the effluent passed to the secondary settling tank for 1 h and then recovered to determine the output parameters at 97 h (Pedroza-Camacho et al 2018 ; Puentes-Morales et al 2021 ). For the curves with only WW bacteria, 2.0 L of WW replaced the 2.0 L of the consortium to complete the TEV of the biological reactor.…”

Section: Methodsmentioning

confidence: 99%

Wastewater treatment from a science faculty during the COVID-19 pandemic by using ammonium-oxidising and heterotrophic bacteria

Pedroza-Camacho,

Ospina-Sánchez,

Romero-Perdomo

et al. 2024

3 Biotech

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During and after the pandemic caused by the SARS-CoV-2 virus, the use of personal care products and disinfectants increased in universities worldwide. Among these, quaternary ammonium-based products stand out; these compounds and their intermediates caused substantial changes in the chemical composition of the wastewater produced by these institutions. For this reason, improvements and environmentally sustainable biological alternatives were introduced in the existing treatment systems so that these institutions could continue their research and teaching activities. For this reason, the objective of this study was to develop an improved culture medium to cultivate ammonium oxidising bacteria (AOB) to increase the biomass and use them in the treatment of wastewater produced in a faculty of sciences in Bogotá, D.C., Colombia. A Plackett Burman Experimental Design (PBED) and growth curves served for oligotrophic culture medium, and production conditions improved for the AOB. Finally, these bacteria were used with total heterotrophic bacteria (THB) for wastewater treatment in a pilot plant. Modification of base ammonium broth and culture conditions (6607 mg L−1 of (NH4)2SO4, 84 mg L−1 CaCO3, 40 mg L−1 MgSO4·7H2O, 40 mg L−1 CaCl2·2H2O and 200 mg L−1 KH2PO4, 10% (w/v) inoculum, no copper addition, pH 7.0 ± 0.2, 200 r.p.m., 30 days) favoured the growth of Nitrosomonas europea, Nitrosococcus oceani, and Nitrosospira multiformis with values of 8.23 ± 1.9, 7.56 ± 0.7 and 4.2 ± 0.4 Log10 CFU mL−1, respectively. NO2− production was 0.396 ± 0.0264, 0.247 ± 0.013 and 0.185 ± 0.003 mg L−1 for Nitrosomonas europea, Nitrosococcus oceani and Nitrosospira multiformis. After the 5-day wastewater treatment (WW) by co-inoculating the three studied bacteria in the wastewater (with their self-microorganisms), the concentrations of AOB and THB were 5.92 and 9.3 Log10 CFU mL−1, respectively. These values were related to the oxidative decrease of Chemical Oxygen Demand (COD), (39.5 mg L−1), Ammonium ion (NH4+), (6.5 mg L−1) Nitrite (NO2−), (2.0 mg L−1) and Nitrate (NO3−), (1.5 mg L−1), respectively in the five days of treatment. It was concluded, with the improvement of a culture medium and production conditions for three AOB through biotechnological strategies at the laboratory scale, being a promising alternative to bio-augment of the biomass of the studied bacteria under controlled conditions that allow the aerobic removal of COD and nitrogen cycle intermediates present in the studied wastewater.

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Biological and photocatalytic treatment at pilot plant scale of synthetic coloured wastewater produced in university teaching laboratories

Abstract: Modelado de la biodegradación en biorreactores de lodos de hidrocarburos totales del petróleo intemperizados en suelos y sedimentos (Biodegradation modeling of sludge bioreactors of total petroleum hydrocarbons weathering in soil and sediments)

Cited by 6 publications

References 40 publications

Comparison of two leachate treatment systems by use of bioreactors packed with stabilized material of different age

Comparison of two leachate treatment systems by use of bioreactors packed with stabilized material of different age

Performance Comparison between Anaerobic Hybrid Reactor and Anaerobic Continuous Stirred-Tank Reactor for High-Strength Fresh Leachate Treatment

Wastewater treatment from a science faculty during the COVID-19 pandemic by using ammonium-oxidising and heterotrophic bacteria

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