Application of lime and calcium hypochlorite in the dephenolisation and discolouration of olive mill wastewater

Boukhoubza, F.; Jail, A.; Korchi, F.; Idrissi, Laila; Hannache, Hassan; Duarte, Júlio César; Hassani, Lahcen; Nejmeddine, A.

doi:10.1016/j.jenvman.2009.07.004

Cited by 38 publications

(17 citation statements)

References 27 publications

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“…Aktas et al (2001) conseguiram uma eficiência entre 63 e 73% na remoção de polifenóis, quando adicionaram cal à água residuária do processamento de oliva, a qual é rica em compostos fenólicos. Boukhoubza et al (2009) removeram 60% dos polifenóis da água residuária do processamento de oliva, cuja concentração inicial média era de 2.080 mg L -1 , ao adicionarem 1% de cal, na relação peso/volume. Ao tratarem água residuária do processamento de oliva com cal, Khoufi et al (2007) reportaram redução de cerca de 50% da toxicidade, atribuída à remoção de compostos fenólicos.…”

Section: Methodsunclassified

Desempenho de sistemas alagados no tratamento de águas residuárias do processamento dos frutos do cafeeiro

Fia

Matos²,

Queiroz³

et al. 2010

Rev. bras. eng. agríc. ambient.

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RESUMONove sistemas alagados (SACESHs) foram construídos em escala piloto (1,5 m de comprimento, 0,5 de largura e 0,4 m de profundidade), cultivados com Typha sp. e Alternanthera phyloxeroides, e operados sob diferentes taxas de aplicação orgânica, no tratamento da água residuária do processamento dos frutos do cafeeiro (ARC). Três sistemas receberam ARC sem nenhum pré-tratamento, em três foi aplicada ARC com correção de pH e correção nutricional e nos três últimos os efluentes de filtros anaeróbios utilizados no tratamento da ARC, que teve o pH e o teor de nutrientes corrigidos. Os resultados mostraram que o aumento nas taxas de carga superficial dos constituintes da ARC no sistema proporcionou decréscimo na eficiência de remoção de matéria orgânica e compostos fenólicos, em todos os SACESHs avaliados. Os tempos de detenção hidráulica superiores a 100 h proporcionaram maiores eficiências na remoção de DQO (SAC Performance of constructed wetlands used in the treatment of wastewater of coffee processing ABSTRACT Nine constructed wetlands (SACESHs) were built on a pilot scale (1.5 m long, 0.5 wide and 0.4 m deep), grown with Typha sp. and Alternanthera phyloxeroides, and operated under different organic loads in the treatment of wastewater of coffee processing (ARC). Three systems received no ARC pre-treatment, three received ARC with correction of pH and nutritional correction, and the last three received the effluent of filters used in the anaerobic treatment of ARC that had the pH and nutrient content corrected. The results showed that the increase in the rate of surface charge of the constituents of the ARC provided the decrease in efficiency of removal of all SACESHs evaluated. The hydraulic detention time of more than 100 h provided higher efficiencies in the removal of COD (SAC , showed a satisfactory performance with regard to the removal of BOD (63%), COD (85%) and phenolic compounds (65%).

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Section: Methodsunclassified

Desempenho de sistemas alagados no tratamento de águas residuárias do processamento dos frutos do cafeeiro

Fia

Matos²,

Queiroz³

et al. 2010

Rev. bras. eng. agríc. ambient.

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“…The average removal percentage of the other parameters are 29.3-46.9% for total solids, 41.2-53.2% for volatile solids, 74.4-37.0% for reduced sugar, 94.9-95.8% for oilgrease, 73.5-62.5% for polyphenols, 38.4-32.0% for volatile phenols and 60.5-80.1% for nitrogenous compounds, respectively [43]. The application of Ca(OH) 2 for the removal of soluble COD, phenolic and polyphenolic like compounds, and other organic compounds responsible for the olive mill wastewater (OOWW) colour has been studied by Boukhoubza [44]. For 1% lime concentration, the contents of COD and TSS are reduced to around 72%, 73% and 60% for polyphenols [44].…”

Section: Potential Of Calcium Based Coagulantmentioning

confidence: 99%

“…The application of Ca(OH) 2 for the removal of soluble COD, phenolic and polyphenolic like compounds, and other organic compounds responsible for the olive mill wastewater (OOWW) colour has been studied by Boukhoubza [44]. For 1% lime concentration, the contents of COD and TSS are reduced to around 72%, 73% and 60% for polyphenols [44].…”

Section: Potential Of Calcium Based Coagulantmentioning

confidence: 99%

Current Review on the Coagulation/Flocculation of Lignin Containing Wastewater

Yaser¹,

Tl²,

Ma³

et al. 2014

Int J Waste Resources

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Agro based industries including pulp and paper mill, palm oil mill, textile, dairy parlour etc. are characterised by its water intensive nature. The pollution problems related to the agro-based industries wastewater are colour, odour and toxicity. Lignin is the major colorant in the agro based industry wastewater. This review is dedicated to explore the lignin and its removal from wastewater via coagulation/flocculation. Over the years, several studies have been conducted for lignin removal using coagulation/flocculation. Aluminium based and iron based coagulants are widely used for this purpose. However, their usage could deteriorate the performance of biological post treatment. Among others coagulant, calcium based coagulant is seems to be an alternative. Hence, there is interest in developing the use of calcium based coagulants alone or hybrid calcium-other metals coagulant that might fully dismiss or minimize the adverse impact of the aluminium and iron based coagulants. On the whole it looks for the possibility of calcium based salt as a potential coagulant.

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“…This chelating effect of calcium cations is widely applied in the coagulation of polymers . In protein extraction, the calcium ions are hypothesized to cause coagulation of leaf components, including polyphenol, pectin, lignin, and even protein . The latter case will reduce protein extraction yields.…”

Section: Introductionmentioning

confidence: 99%

Sustainable scenarios for alkaline protein extraction from leafy biomass using green tea residue as a model material

Zhang

Slegers

Wisse

et al. 2018

Biofuels Bioprod Bioref

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Leaf protein can be extracted cost‐efficiently using 0.1 mol dm−3 NaOH, but this process is less sustainable due to the generation of large amounts of sodium salts. KOH or Ca(OH)2 are considered as replacements for NaOH, as these salts can be reused. This work evaluates the economic and environmental sustainability of weak alkaline pectin extraction followed by KOH enhanced protein extraction, and Viscozyme® L‐aided pectin extraction followed by Ca(OH)2 enhanced protein extraction. The evaluations are made for green tea residue and are compared to related processes using NaOH. The predicted profits using KOH are comparable to those using NaOH. Environmental sustainability improves for all impact categories in the case of KOH extraction. Further environmental benefits are obtained by substituting conventional K fertilizer with the K‐rich salty waste water from the extraction process. The profits of the process using Ca(OH)2 are highly dependent on the extraction yield of the protein product. Protein extraction yields using Ca(OH)2 need to be higher than 70% to be more profitable than the same process with NaOH. The environmental benefits of Ca(OH)2 extraction include the absence of salty waste water and the net production of heat. This is accompanied by increased electricity consumption. Thus, the impact categories of climate change, fossil and water depletion, and particulate matter formation worsen. Photochemical oxidant formations remain the same, while the other impacts improve. This work has shown the potential and bottlenecks of NaOH, KOH and Ca(OH)2 protein extraction on different types of biomass in terms of environmental and economic sustainability. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd

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Application of lime and calcium hypochlorite in the dephenolisation and discolouration of olive mill wastewater

Cited by 38 publications

References 27 publications

Desempenho de sistemas alagados no tratamento de águas residuárias do processamento dos frutos do cafeeiro

Desempenho de sistemas alagados no tratamento de águas residuárias do processamento dos frutos do cafeeiro

Current Review on the Coagulation/Flocculation of Lignin Containing Wastewater

Sustainable scenarios for alkaline protein extraction from leafy biomass using green tea residue as a model material

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