Olive oil waste treatment: A review

Yung-Tse Hung 1, *, Sai Nikhil Kolla 1, Howard H Paul 2 and Christopher R Huhnke 1

1 Department of Civil and Environmental Engineering, Cleveland State University, Cleveland, Ohio, USA.
2 Department of Information Systems, Cleveland State University, Cleveland, Ohio, USA.
 
Review Article
World Journal of Advanced Research and Reviews, 2024, 23(02), 1791–1795
Article DOI: 10.30574/wjarr.2024.23.2.2546
Publication history: 
Received on 12 July 2024; revised on 20 August 2024; accepted on 22 August 2024
 
Abstract: 
The most intriguing results were obtained on UASB reactors, both at laboratory and pilot scale, fed on diluted waste, and the most promising results were obtained on UASB reactors, both at laboratory and pilot scale, fed on diluted waste. With these digesters, volumetric loading rates were observed and 70 percent removal efficiency was achieved. The start-up of UASB reactors fed with waste from olive oil mills is a complicated process that must be carefully monitored and optimized. Starting with very diluted trash yielded the greatest results. Granulation of the sludge, as seen in UASB digesters fed on sugar beet wastewaters, was not attained; however, the sludge's settleability was observed to be excellent. Since the olive oil industry has been blamed for a lot of pollution, there has been a lot of pressure to improve olive oil waste treatment facilities. Bioremediation (ex-situ, in-situ), thermal processes (incineration, pyrolysis, gasification), evaporation, membrane processes, electrolysis, ozonation, digestion, Coagulation/flocculation/precipitation, and distillation are among the many methods currently in use. Per the waste treatment approach, both advantages and downsides were described, along with the methodology and explicit flow diagrams. Furthermore, the most recent studies were provided, with around twenty–five figures primarily illustrating the efficacy of current waste treatment procedures versus time or temperature. The comparison of the various olive oil waste treatment approaches revealed that, while bioremediation is the most environmentally beneficial option, it is not the only one.
 
Keywords: 
Sugar beet wastewaters; Bioremediation; UASB digesters; Pyrolysis; Membrane processes
 
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