olive mill wastewater

Sustainable recovery of phenolic compounds from olive mill wastewater. An LCA evaluation

The disposal of olive mill wastewater is one of the main environmental problems of olive oil production. The interest in the recovery of olive mill wastewater has increased in recent years, as their purification from potentially harmful molecules, such as phenolic compounds. The aim of this work was to study the sustainable recoveries of phenolic compounds from olive mill wastewater, through an integrated Life Cycle Assessment and Eco-Care Matrix evaluation.

Integrated microalgae biomass production and olive mill wastewater biodegradation: optimization of the wastewater supply strategy

Olive mill wastewater (OMW) was supplied to Scenedesmus sp. cultures to simultaneously achieve biomass production and wastewater biodegradation. Two OMW supply strategies were implemented to prevent the reduced growth performances that are attained, compared to photoautotrophic cultivation, when OMW is supplied at the beginning of cultivation (batch strategy). A fed-batch strategy including the gradual OMW supply yielded a biomass production equal to 0.86 g/L, while 1.4 g/L was attained by a two-stage strategy including OMW addition during nitrogen-starvation.

The influence of phenols extracted from olive mill wastewater on the heterotrophic and mixotrophic growth of Scenedesmus sp.

BACKGROUND: Mixotrophic and heterotrophic growth of microalgae through biodegradation of olive mill wastewaters (OMW) is a promising strategy to improve the economic viability of microalgae production processes. However, OMW are characterized by an elevated phenols content, which makes their treatment by biological processes difficult. In this work, the influence of OMW phenols on microalgae growth was investigated by using the phenols extracted with a resin from OMW.

Effect of Ca2+ concentration on Scenedesmus sp. growth in heterotrophic and photoautotrophic cultivation

The influence of Ca2+ concentration on the growth of the microalga Scenedesmus sp. in heterotrophic and photoautotrophic cultivations was investigated. Heterotrophic growth was induced by the addition of olive mill wastewaters (9% v·v-1) to the culture. Variations in the calcium concentration affected differently biomass production depending on whether microalgae were cultivated under heterotrophic or photoautotrophic regime. In photoautotrophic regime, increasing the calcium concentration from 20 to 230mgL-1 decreased maximum cell concentration and growth rate.

Rapid and sustainable recovery of phenolic compounds from olive mill wastewater with gold nanoparticles

Phenolic compounds represent one of the most important and ubiquitous groups of plant
metabolite. They have possible beneficial implicaons in human health, such as their an-
microbial, an-carcinogenic effects and their anoxidant acvity. Phenolic compounds could be
considered like “quality molecular markers” in food. During the producon process of Olive Oil
is generate an important by-product: the olive mill waste water (OMWW). OMWW consist of
the water contained in the drupe, the washing water and the process water. In OMWW is

Olive mill wastewater integrated purification through pre-treatments using coagulants and biological methods: experimental, modelling and scale-up

In the Mediterranean countries, olive oil production is considered as an important economic activity among agro-industrial production, at the same time, discharge of Olive Mill Wastewater (OMWW) is also a severe problem in these regions. In any industry involving water and wastewater treatment processes, optimization is important for the development of new or enhancement of existing ones regarding economical and efficiency attributes and the like. In this work, the optimization of coagulation and flocculation was performed focusing on the effect of different pH and coagulant dosage values.

Boundary flux modelling for purification optimization of differently-pretreated agro-industrial wastewater with nanofiltration

The design and operation of membrane purification plants implies the prediction and control of dynamic fouling phenomena as a key to succeed. In this research article, the boundary flux theory was used to set-up and control the operating framework and model the performance of a NF membrane operation, for the purification of olive mill wastewater (OMW) previously conducted to different pretreatments. Olive oil is produced by means of a technological process which avoids the use any chemicals.

Analysis of the flux performance of different RO/NF membranes in the treatment of agroindustrial wastewater by means of the boundary flux theory

Dynamic membrane system behaviour must be adequately addressed to avoid process unfeasibility. The lack of proper analysis will mean relying on erroneous permeate flux values in the system design, which will lead to quick and/or steady high fouling rates. In this paper, the authors present additional data supporting the boundary flux theory as a helpful tool for membrane engineers to carefully avoid process failures.

Pre-treatment processes optimization for the purification of olive mill wastewater through a pilot-scale membrane plant

The reported work deals with the evaluation of two different pre-treatment processes performances for the purification of a real olive mill wastewater. The wastewater was from an oil mill placed in the South of Italy and presents high Chemical Oxygen Demand (COD), Total Organic Carbon (TOC) and phenols concentrations, besides other organic pollutants, an acid pH and brown colour. Therefore, this complex wastewater resulted in low- biodegradable and difficult to be treated by a solely process.

© Università degli Studi di Roma "La Sapienza" - Piazzale Aldo Moro 5, 00185 Roma