Utilization of biobed for the efficient treatment of olive oil mill wastewater

Kinigopoulou, Vasiliki; Hatzigiannakis, Evangelos; Guitonas, A.; Oikonomou, Efstathios K.; Samaras, Petros

doi:10.5004/dwt.2021.27123

Cited by 5 publications

(4 citation statements)

References 16 publications

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“…Bio-mixture prepared of straw, soil and compost (50:25:25 vol%), used for two consecutive years as organic bio-filter of olive oil mill wastewater as described in our previous work [16], was extracted from the biobed; it was then homogenized and finally spread out outside undercover for almost four weeks, in order to air dry naturally under sun exposure. Physicochemical characteristics of the bio-mixture are presented in Table 1.…”

Section: Characteristics Of the Soil Used Bio-mixture And Irrigation ...mentioning

confidence: 99%

“…This study aims to present the results of soil samples analysis after their mix with a biobed bio-mixture of straw, soil and compost, used for two consecutive years as the organic bio-filter of olive oil mill wastewater [15,16]. So far, exhausted bio-mixtures used in bio-beds to minimize pesticide point-source contamination turned out to contain residues of pesticides and they are considered hazardous wastes; thus, they require special treatment before their disposal [17].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Biobed Bio-Mixture from Olive Oil Mill Wastewater Treatment as a Soil Organic Amendment in a Circular Economy Context

Kinigopoulou¹,

Hatzigiannakis²,

Guitonas

et al. 2022

Applied Sciences

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This study, based on circular economy principles and sustainable development practices, aims to present the results of soil samples analysis after their mixture with a biobed bio-mixture of straw, soil and compost, used for two consecutive years as organic bio-filter of olive oil mill wastewater. So far, exhausted bio-mixtures used in biobeds to minimize pesticide point-source contamination turned out to contain residues of pesticides, and they are considered hazardous wastes; thus, they require special treatment before their disposal. Contrariwise, saturated bio-mixtures from bio-bed systems utilized for olive mill wastewater (OMWW) treatment not only do not require any special treatment before their final disposal but also can be exploited as a soil amendment. To this end, the effects of the used bio-mixture application in three different proportions as a soil amendment on the physical and chemical properties of medium-texture soil were investigated. The application of water simulating a typical irrigation period during a growing season took place. Upon completion of the water application, soil samples were collected from two different depths of the columns and analyzed, and leachates collected from the columns were also analyzed. Soil texture, organic matter, calcium carbonate, electrical conductivity (EC), pH, total nitrogen, nitrates, nitrites, ammonium, available phosphorus, exchangeable potassium, sodium, calcium and magnesium, exchangeable sodium percentage (ESP), cation exchange capacity (CEC), available iron, manganese, copper, zinc and boron were monitored in the soil samples as indexes of potential soil amendment, and EC, pH, nitrates, potassium, sodium, calcium, magnesium, sodium adsorption ratio (SAR), total hardness, iron, manganese, copper, zinc and boron were monitored in the leachates as indexes of potential groundwater contamination.The study demonstrated the effective use of saturated bio-mixture as an organic soil amendment, while the impact of selected amendments on groundwater was the minimum.

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Section: Characteristics Of the Soil Used Bio-mixture And Irrigation ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of Biobed Bio-Mixture from Olive Oil Mill Wastewater Treatment as a Soil Organic Amendment in a Circular Economy Context

Kinigopoulou¹,

Hatzigiannakis²,

Guitonas

et al. 2022

Applied Sciences

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“…In 2021, a study was done on the efficiency of the treatment, purification, and detoxification of a highly loaded olive oil wastewater effluent concluded that the use of a biobed layer was efficient in pollutant removal [17]. A decrease in biochemical oxygen demand, chemical oxygen demand, total phenols, total Kjedahl nitrogen, and NH + 4 respectively decrease by 96%, 92%, 88%, 85%, and 100% [26].…”

Section: Introductionmentioning

confidence: 99%

Short-term effects of olive-mill-wastes-derived biochars amendment and arbuscular mycorrhizal fungi inoculation on growth of maize (Zea mays) and mycorrhizal colonization

Minkosse,

Langenfeld,

Azzaz

et al. 2024

Comptes Rendus. Chimie

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“…Spain, Italy, Greece, Turkey, Tunisia, Portugal, Syria, and Morocco are the major olive oil producers worldwide. Although these countries produce million tons of olive oil, disposal, treatment and recovery of the huge amounts of the generated by-products and wastes in short time, represent a crucial and challenging issue [39]. Since conventional physical, chemical, mechanical, biological and thermal methods proved to be inefficient on pollutants removal and have shown moderate efficiencies in terms of waste mineralization, being also laborious and expensive, the production of biochar has been studied as a conversion technology for olive mill wastes [40].…”

Section: Introductionmentioning

confidence: 99%

Geochemical Modelling of Inorganic Nutrients Leaching from an Agricultural Soil Amended with Olive-Mill Waste Biochar

Kypritidou

Doulgeris²,

Tziritis³

et al. 2022

Agronomy

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This work examines in silico the dominant geochemical processes that control inorganic nutrients (Ca, Mg, Na, K) availability in irrigated agricultural soil amended with potassium-enriched biochar (from olive mill wastes) at mass doses of 0.5%, 1%, 2% and 10%. The geochemical modelling step was supported by analytical measurements regarding the physicochemical characteristics of the irrigation water, the agricultural soil and the biochar. Two geochemical approaches, namely equilibrium exchange (E.E.) and kinetic exchange (K.E.) models were applied and compared to assess nutrient release with an emphasis on potassium availability. Equilibrium exchange perspective assumed that nutrient release is controlled by ion-exchange reactions onto the biochar surface, whilst kinetic exchange perspective assumed the contribution of both ion-exchange and dissolution of salts. Results indicated that for the E.E. model, the soluble amount of potassium is readily available for transport within the pores of the porous media, and therefore is leached from the column within only 10 days. For the K.E. model that assumes a kinetically controlled release of potassium due to interactions occurring at the solid-solution interface, the assessed retention times were more realistic and significantly higher (up to 100 days). Concerning the applied doses of biochar, for a 2% biochar fraction mixed with soil, for example, the available K for plants doubled compared with the available K in the soil without biochar. In any case, the use of numerical modeling was proven helpful for a quick assessment of biochar performance in soil, by avoiding time-consuming and laborious experimental set-ups. Validation of the models by experimental data will further establish the proposed mechanisms.

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Utilization of biobed for the efficient treatment of olive oil mill wastewater

Cited by 5 publications

References 16 publications

Evaluation of Biobed Bio-Mixture from Olive Oil Mill Wastewater Treatment as a Soil Organic Amendment in a Circular Economy Context

Evaluation of Biobed Bio-Mixture from Olive Oil Mill Wastewater Treatment as a Soil Organic Amendment in a Circular Economy Context

Short-term effects of olive-mill-wastes-derived biochars amendment and arbuscular mycorrhizal fungi inoculation on growth of maize (Zea mays) and mycorrhizal colonization

Geochemical Modelling of Inorganic Nutrients Leaching from an Agricultural Soil Amended with Olive-Mill Waste Biochar

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