Pilot plant investigation on the start-up of a UASB reactor using sugar mill effluent

Document Type: Research paper

Authors

1 Faculty Members, National University Sciences and Technology (MCE-NUST), Islamabad, Pakistan

2 Research Student, Abdul Wali Khan University, Mardan, Pakistan

Abstract

The treatment technologies, such as the anaerobic digestion process, have been used in many developing countries that should not only reduce the pollution load but could also be able to assist in solving the energy problems (biogas production). With respect to several sugary mills in Pakistan with discharging organic-rich wastes without any proper treatment, this study evaluated the start-up of the UASB reactor using actual sugar mill effluent at constant pH and temperature. The results showed at an organic loading rate of 2.1 kgCOD/m3/day and a hydraulic retention time of 16 h, more than 70% of COD could be reduced. It also showed that in terms of COD decreasing, the longer retention time appeared to be more encouraging and vice-versa. The average VFAs and biogas generation was measured 340 mg/L and 0.30 L/gCOD/day, respectively (58-59% composition of methane was found there). According to the results, to reduce the pollution load of sugar mills outflow, the use of the UASB reactor at neutral pH and mesophilic range of temperature is a quite achievable and viable option.

Graphical Abstract

Pilot plant investigation on the start-up of a UASB reactor using sugar mill effluent

Highlights

  • The use of alum in sugar mills effluent treatment is cost-effective and available.
  • Water pollution and the shortage are now at a warning level in Pakistan.
  • Major of parameters were not in Pak-EPA NEQS limitations in the studied area.
  • The application of the UASB reactor is an entirely achievable and viable option for reducing the pollution load of sugar mills outflow.

Keywords

Main Subjects


Ahmed, T., Pervez, A., Mehtab, M., Sherwani, S.K., 2015. Assessment of drinking water quality and its potential health impacts in academic institutions of Abbottabad (Pakistan). Desalin. Water Treat., 54(7), 1819-1828.
Albrizio, S., Kozluk, T., Zipperer, V., 2017. Environmental policies and productivity growth: Evidence across industries and firms. J. Environ. Econ. Manage., 81, 209-226.
Ali, A., Hashmi, H.N., Intikhab, A.Q., 2010. Effects of Methanol on the Treatability of Black Liquor using UASB reactor. Hydro Nepal: J. Water Energy Environ., 6, 42-46.
Bhatti, Z.I., Furukawa, K., Fujita, M., 1996. Feasibility of methanolic waste treatment in UASB reactors. Water Res., 30(11), 2559-2568.
Dos Santos, I.F.S., Barros, R.M., Tiago Filho, G.L., 2016. Electricity generation from biogas of anaerobic wastewater treatment plants in Brazil: an assessment of feasibility and potential. J. Clean. Prod., 126, 504-514.
Henze, M., Harremoës, P., 1983. Anaerobic treatment of wastewater in fixed film reactors–a literature review. Water Sci. Technol., 15(8-9), 1-101.
Pol, L. H., Lettinga, G., 1986. New technologies for anaerobic wastewater treatment. Water Sci. Technol., 18(12), 41-53.
Rosas-Mendoza, E.S., Méndez-Contreras, J.M., Martínez-Sibaja, A., Vallejo-Cantú, N.A., Alvarado-Lassman, A., 2018. Anaerobic digestion of citrus industry effluents using an Anaerobic Hybrid Reactor. Clean Technol. Environ. Policy., 20(7), 1387-1397.
Seghezzo, L., Zeeman, G., van Lier, J.B., Hamelers, H.V.M., Lettinga, G., 1998. A review: the anaerobic treatment of sewage in UASB and EGSB reactors. Bioresour. Technol., 65(3), 175-190.
Sun, Y., Liu, Z., Fatehi, P., 2018. Developing performance-property correlation for fly ash as adsorbent for pulping effluents. J. Environ. Chem. Eng., 6(2), 2502-2513.
Urasaki, K., Sumino, H., Danshita, T., Yamaguchi, T., Syutsubo, K., 2019. Biological treatment of electronic industry wastewater containing TMAH, MEA and sulfate in an UASB reactor. J. Environ. Sci. Health., 54(11), 1109-1115.