Biodegradation of Olive Mill Effluent by White-Rot Fungi

Abstract

The liquid fraction from the two-phase extraction process in the olive industry (alperujo), is a waste that contains lignocellulosic organic matter and phenolic compounds, difficult to treat by conventional biological methods. Lignocellulosic enzymes from white-rot fungi can be an interesting solution to break down these recalcitrant compounds and advance the treatment of that waste. In the present work the ability of Phanerochaete chrysosporium to degrade the abovementioned liquid waste (AL) was studied. Experiments were carried out at 26 °C within the optimal pH range 4–6 for 10 days and with and without the addition of glucose, measuring the evolution of COD, BOD5, biodegradability index, reducing sugars, total phenolic compounds, and colour. The results obtained in this study revealed the interest of Phanerochaete chrysosporium for an economical and eco-friendly treatment of alperujo, achieving COD and colour removals around 60%, and 32% of total phenolic compounds degradation, regardless of glucose addition.

The Bioremediation of Industrial Effluents by Phanerochaete chrysosporium: The COD, TOC Removal Efficiency and Biochemical Assessment for Dreissena polymorpha

“…An approximately 2‐fold increase in GPx level was determined in the kidneys of these animals exposed to wastewater. (Díaz et al, 2021) also examined the ability of P. chrysosporium to degrade toxic substances in wastewater [45] . As a result of the study, approximately 60 % of COD and 32 % of the total phenolic compounds were degraded independently of color removal and glucose addition.…”

“…(Díaz et al, 2021) also examined the ability of P. chrysosporium to degrade toxic substances in wastewater. [45] As a result of the study, approximately 60 % of COD and 32 % of the total phenolic compounds were degraded independently of color removal and glucose addition. Abdulaal et al (2017) reported that irrigation with domestic sewage was performed on Phoenix dactylifera L. of some commercial Saudi palm cultivars Agwa.…”

“…P. chrysosporium has been shown to be very successful for the treatment of waste materials and digestive effluents from the paper, [9] textile [10] and olive oil industries. [11] Animal wastewater [12] and anaerobic sewage sludge treatment are some examples. [13] The use of fungi in the treatment of industrial wastewater is an older method, not a new technology.…”

Special Issue on Promising Research and Strategies in Wastewater Treatment, Sludge Management, and Valorisation: Volume I

“…Certain effluents from the food industry, such as the olive sector, contain lignocellulosic organic matter and phenolic compounds, which are difficult to eliminate using conventional biological methods. Díaz et al [11] evaluated Phanerochaete chrysosporium to treat "alperujo" (olive pomace), a by-product composed of pulp waste, ground stone, and skin, together with vegetation waters. COD (Chemical Oxygen Demand) and colour removals of around 60%, and 32% of total phenolic compounds degradation, were achieved in this work, showing the interest of this fungi in recalcitrant compound treatment.…”