Biomass behaviour in a conventional activated sludge system treating olive mill wastewater

Moussaoui, Tawfik El; Jaouad, Yasamine; Mandi, Laila; Marrot, B.; Ouazzani, Naaila

doi:10.1080/09593330.2017.1296899

Cited by 17 publications

(6 citation statements)

References 65 publications

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“…Exhibit 3 shows the values of Na + , Ca 2+ , K + and Cl – contents where potassium is the most predominant cationic metal. These results are in the same order of those indicated by other authors in the literature (El Moussaoui et al., 2018; Hodaifa et al., 2019; Khdair & Abu‐Rumman, 2020; Mekki et al., 2016). The high values registered of these inorganic salts allow the use of these wastewaters as a fertilizer for agricultural land.…”

Section: Resultssupporting

confidence: 91%

“…Currently, these wastewaters have high attention by the scientific community, which proposes many alternatives for its treatments. In this sense, it can be mentioned: chemical flocculation (Hodaifa et al, 2019), anaerobic digestion (González-González & Cuadros, 2015), diafiltration (Gkoutsidis et al, 2011), coagulation, membrane technology, reverse osmosis and biofiltration (Stoller et al, 2016), coagulationflocculation (Achak et al, 2008;Elayadi et al, 2019;Majdy et al, 2015), treatments by adsorption onto wheat bran (Achak et al, 2014), aerobic treatment (El Moussaoui et al, 2018). Many studies conducted for the OMWW treatment have focused on adsorption, since it is considered as an effective retention technique, with many advantages such as: simplicity and reversibility.…”

Section: Introductionmentioning

confidence: 99%

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High adsorption capacity of thermally treated solid olive wastes to treat olive mill wastewater

Bekri

Taleb

et al. 2021

Environmental Quality Mgmt

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In this study, solid olive wastes were suggested as adsorbents for olive mill wastewater (OMWW) clean-up. These solid olive wastes underwent thermal treatment by twostep process: carbonization at 300 • C and 400 • C, then physical activation at 800 • C and 1000 • C. Characterizations were determined by FTIR, TGA/DTA, and N 2 Adsorption-Desorption techniques. The efficiency of these new bio-adsorbents was verified on OMWW. Adsorption kinetics experiments were realized at room temperature and diluted OMWW (1/100 v/v). Evaluation of obtained activated carbons (ash, iodine value, and moisture) shows a good activity and stability in weight according to the thermogravimetric analysis. Moreover, the textural results of BET surface area showed a high area for activated carbons prepared from olive stones at 300 • C/800 • C (S BET = 208 ± 0.3 m 2 /g) and olive flesh at 400 • C/1000 • C (S BET = 77 ± 0.8 m 2 /g). The adsorption rates of OMWW were 91% after 120 min and 95.3% after 60 min contact time at pH = 2.0, respectively. At the end, the pH increased to neutral value. Thus, these bio-adsorbents from solid waste of olive industry can be efficient adsorbents for their liquid effluent clean-up.

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

High adsorption capacity of thermally treated solid olive wastes to treat olive mill wastewater

Bekri

Taleb

et al. 2021

Environmental Quality Mgmt

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show abstract

“…The obtained removal efficiency might not meet the enforced allowable limits even at the very high treatment costs reported at 32 €/m 3 (Paraskeva et al, as cited in Gebreyohannes et al, 2016). Other tested treatment technologies include coagulation-flocculation (Vuppala et al, 2019); electro-coagulation (Neffa et al, 2010;Haksevenler & Alaton, 2014;Abou-Taleb et al, 2018;Jalo et al, 2018); aerobic biological treatment (El-Hajjouji et al, 2014;El-Moussaoui et al, 2018); anaerobic digestion (Gunay & Karadag, 2015;Enaime et al, 2019); electrolysis (Bouhssine et al, 2013); Fenton treatment (Amor et al, 2015); photo-Fenton treatment (Ahmed et al, 2011); and ozonation (Martins et al, 2015). Reported removal efficiencies for the COD and phenols for these systems are generally lower than membrane systems, although less costly.…”

Section: Bottlenecks Related To Existing Regulations and Standardsmentioning

confidence: 99%

Impact of legislation on olive mill wastewater management: Jordan as a case study

2021

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Olive mill wastewater (OMWW) management is becoming more challenging and a major environmental concern due to several factors including the very complex wastewater, which is considered one of the most difficult-to-treat. Seasonal production and small scattered family milling business have resulted in augmented management challenges. As the eighth largest olive oil exporter, Jordan is not an exception and faces some environmental and management concerns. The country had recently managed OMWW wel; however, some issues need to be addressed in order to meet environmental requirements of the growing business. This paper aims at evaluating the Jordanian experience in OMWW management and recommends additional alternatives. OMWW shipping is controlled by a tracking system to designated disposal sites. However, weak enforcement of penalties results in violations. Moreover, current management practical options are limited in view of existing regulations since agricultural land application and decentralized management are discouraged. Legislative gaps are discussed and suggestions for a comprehensive revision established to allow for additional management alternatives. A revised legislative framework that takes into account resource recovery and the valorization of OMWW based on scientific evidence is highly recommended.

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“…According to Bolto and Gregory (2007) the normally used anionic and non-ionic polymers are generally of low toxicity, but cationic polyelectrolytes are more toxic, especially to aquatic organisms. In order to improve the efficiency of direct flocculation process, many researchers have studied the development of natural low-cost (bio-flocculants) alternatives to synthetic polyelectrolytes (Rizzo et al, 2008;Renault et al, 2009;Fragoso and Duarte, 2012;Speltini et al, 2016;El Moussaoui et al, 2018). The major advantage of natural polymer is its non-toxicity to the environment and biodegradability.…”

Section: Removal Of Phenolic Compounds From Omw By Coagulation-floccumentioning

confidence: 99%

Chemical Coagulation/Flocculation Processes for Removal of Phenolic Compounds from Olive Mill Wastewater: A Comprehensive Review

Achak¹,

Elayadi²,

Boumya³

2019

American Journal of Applied Sciences

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Olive oil extraction processes generate three phases: Olive oil, solid residue (pomace) and aqueous liquor Olive Mill Wastewater (OMW). OMW causes serious environmental deteriorations such as coloring of natural waters, alteration of soil quality, phytotoxicity and odor nuisance. The direct discharge of this effluent into the soil bring various negative effects on the environment, due to its high load of organic matter and phenolic compounds. Coagulation, flocculation and their combination processes are among the most applied processes for wastewater treatment. The application of coagulation technique using mineral and inorganic polymeric coagulants and acid cracking is not always effective to reduce COD and phenolic compounds from OMW except lime. Although direct flocculation is a low treatment cost, use less chemical and produce less sludge, the efficiency of COD and phenolic compounds removal remain very low. Coagulationflocculation process is developed in order to enhance the removal efficiency of organic matter from OMW by optimizing the operating conditions. However, many studies showed that the combination of various cationic organic coagulant and flocculant agents did not show any significant decrease of COD and phenolic compounds except for lime combination. In the present review, recent research studies dealing with the application of coagulation/flocculation for removal of phenolic compounds and COD from OMW are presented and compared. Furthermore, the main factors that influence the selection between coagulation, direct flocculation and coagulation-flocculation are presented and the principal removal mechanisms are discussed.

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Biomass behaviour in a conventional activated sludge system treating olive mill wastewater

Cited by 17 publications

References 65 publications

High adsorption capacity of thermally treated solid olive wastes to treat olive mill wastewater

High adsorption capacity of thermally treated solid olive wastes to treat olive mill wastewater

Impact of legislation on olive mill wastewater management: Jordan as a case study

Chemical Coagulation/Flocculation Processes for Removal of Phenolic Compounds from Olive Mill Wastewater: A Comprehensive Review

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