Physicochemical Properties of the Sugar Industry and Ethanol Distillery Wastewater and Their Impact on the Environment

Fito, Jemal; Tefera, Nurelegne; Kloos, Helmut; Hulle, Stijn Van

doi:10.1007/s12355-018-0633-z

Cited by 57 publications

(32 citation statements)

References 40 publications

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“…Furthermore, an estimated 4.8-5.7 billion people will live in potentially water scarce areas by 2050 (UN-Water 2015). It was also reported that water pollution poses serious concerns about human health and environmental risks in many developing countries, particularly those in sub-Sahara, including Ethiopia (Nienie et al 2017;UN Water 2018;Fito et al 2019b). Fluoride pollution of drinking water is very common, particularly in areas where groundwater is the only source of water supply (Sailaja et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Fluoride removal from aqueous solution onto activated carbon of Catha edulis through the adsorption treatment technology

Fito

Said²,

Feleke³

et al. 2019

Environ Syst Res

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Background: Nowadays freshwater quality deterioration and quantity depletion are rapidly increasing across the globe. Especially fluoride polluted groundwater is causing a severe shortage of water supply and public health problem. Hence, this study was designed to investigate the performance of activated carbon produced from the Catha edulis stem for the removal of fluoride from aqueous solution. A C. edulis stem sample was collected from dumping sites of Addis Ababa City and its activation and carbonation processes were performed using H 2 SO 4 and a high temperature of 600 °C. The experimental study was designed to use a full factorial approach with a 3 3 which were the three factors with the three levels, namely pH (2, 7 and 9), contact times (60, 90 and 120 min) and adsorbent doses (0.5 g, 1.0 g and 1.5 g in 100 mL) at the initial fluoride concentration 30 mg/L which resulted in 81 experimental runs in triplicates. Results: The calculated maximum adsorption capacity of 18 mg/g was found under the Langmuir isotherm, whereas the Freundlich model (R 2 0.98) better fitted the experimental data, which indicated that the adsorption process was multilayer and cooperative. The maximum fluoride removal of 73% was observed at the optimum condition of adsorbent dose of 1.5 g in 100 mL contact time of 60 min and pH 2, whereas the predicted value of the fluoride removal of 69% was calculated under the same experimental condition. Fluoride removal was positive and strongly influenced by the adsorbent dose, whereas the adsorption pH was negatively and weakly impacted on removal. Conclusions: Generally, the performance of activated carbon for the removal of fluoride from aqueous solution is promising. The study also indicated that C. edulis activated carbon is a potential candidate for water treatment technology.

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Section: Introductionmentioning

confidence: 99%

Fluoride removal from aqueous solution onto activated carbon of Catha edulis through the adsorption treatment technology

Fito

Said²,

Feleke³

et al. 2019

Environ Syst Res

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“…Distillery stillage has high levels of nutrients, such as nitrogen, phosphorus, potassium, and also of total solids, total dissolved solids, total suspended solids, sulfate, and iron. Table 2 presents the physical and chemical properties of wastewater from the distillery industry [ 1 , 34 , 35 ].…”

Section: Characteristics Of Distillery Stillagementioning

confidence: 99%

Distillery Stillage: Characteristics, Treatment, and Valorization

Mikucka

Zielińska

2020

Appl Biochem Biotechnol

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Distilleries are among the most polluting industries because ethanol fermentation results in the discharge of large quantities of high-strength liquid effluents with high concentrations of organic matter and nitrogen compounds, low pH, high temperature, dark brown color, and high salinity. The most common method of managing this wastewater (distillery stillage) is to use it for soil conditioning, but this requires thickening the wastewater and may cause soil pollution due to its high nitrogen content. Therefore, treatment of distillery stillage is preferable. This review discusses individual biological and physico-chemical treatment methods and combined technologies. In addition, special attention is paid to valorization of distillery stillage, which is a valuable source of polysaccharides and volatile fatty acids (VFAs), as well as natural antioxidants, including polyphenols and other bioactive compounds of interest to the pharmaceutical, cosmetic, and food industries. New directions in improvement of valorization technologies are highlighted, including the search for new eutectic solvents for extracting these compounds. Such technologies are essential for sustainable development, which requires the use of management and valorization strategies for recovery of valuable compounds with minimal disposal of waste streams.

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“…One of the most critical environmental problems of developing countries is the improper management of industrial wastewater due to the complex nature of the wastes generated with the limited technologies to remove all pollutants at a time. Sugar industries play a major role in polluting the water bodies and land by discharging a large amount of wastewater as effluent which has a high amount of solids, BOD 5 , COD, chloride, sulfate, nitrate, calcium and magnesium [12,13]. Wastewater from the sugar mills with high BOD 5 and COD can deplete rapidly the availability of oxygen content in the water bodies and endanger the aquatic life by interfering with the survival of the aquatic flora and fauna.…”

Section: Sugar Industry Wastewatermentioning

confidence: 99%

Sugarcane biorefineries wastewater: bioremediation technologies for environmental sustainability

Fito

Tefera

Hulle

2019

Chem. Biol. Technol. Agric.

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Sugarcane is known to be one of the oldest cultivated plants in tropical and subtropical countries. Sugar industries are increasing exponentially to satisfy the growing demand for sugar; whereas, the ethanol distilleries have been rapidly expanding, since bioethanol emerged as an affordable, low carbon footprint and renewable bioenergy. However, inadequately treated and indiscriminate disposal of the effluent from sugarcane industries resulted in extensive soil and water pollutions. Hence, this study aimed at reviewing the sugarcane industrial process with its water consumption rates, and effluent characteristics and its adverse effects on the environment. Finally, the study has gone through the most common wastewater treatment efforts made to minimize the effluent environmental burden. In addition to the large volumes of sugar and ethanol industrial effluents, the presence of the different varieties of the pollutants in the effluent is challenging for conventional treatment methods. However, eliminating the pollutants is becoming important for environmental and esthetic values. In line with this, a number of studies encompassing physicochemical and biological treatment methods have been conducted but many of them failed to be effective. Furthermore, alternative treatments have also been developed such as recycling of vinasse, fertirrigation and concentrated by evaporation but they were not effective either due to the high energy use or the large effluent volumes which cannot be managed through such methods. However, anaerobic digestion of high rate was found in the state of the art and an effective approach to treat the sugar industry and ethanol distillery effluents.

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Physicochemical Properties of the Sugar Industry and Ethanol Distillery Wastewater and Their Impact on the Environment

Cited by 57 publications

References 40 publications

Fluoride removal from aqueous solution onto activated carbon of Catha edulis through the adsorption treatment technology

Fluoride removal from aqueous solution onto activated carbon of Catha edulis through the adsorption treatment technology

Distillery Stillage: Characteristics, Treatment, and Valorization

Sugarcane biorefineries wastewater: bioremediation technologies for environmental sustainability

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