Integrated treatment of molasses distillery wastewater using microfiltration (MF)

Basu, Sudeshna; Mukherjee, Sangeeta; Kaushik, Ankita; Batra, Vidya S.; Balakrishnan, Malini

doi:10.1016/j.jenvman.2015.04.037

Cited by 46 publications

(9 citation statements)

References 11 publications

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“…This method has severe limitations due to the consumption of large amounts of electricity [ 53 ]. Other drawbacks include the production of chemical sludge, which requires additional measures for effective handling, storage, and utilization or disposal [ 54 ].…”

Section: Treatment 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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Section: Treatment Of Distillery Stillagementioning

confidence: 99%

Distillery Stillage: Characteristics, Treatment, and Valorization

Mikucka

Zielińska

2020

Appl Biochem Biotechnol

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“…Generally, spent wash is the main source of wastewater in distillation process which is subjected to treatment. Distillery spent wash is the most complex and troublesome effluent having strongest organic matter in terms of high COD (80,000-160,000 mg/L), high temperature, high ash content, low acidity (pH 3.7-4.5) with a high content of dissolved inorganic salts [21][22][23] Hence, this molasses spent wash is one of the most difficult waste products to dispose because the pollutants are environmentally not compatible [17]. In addition to high organic matter contents, another peculiar feature of the spent wash is its deep dark brown color which resulted from the color causing pigments.…”

Section: Ethanol Distillery Spent Washmentioning

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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“…For instance, a predominant by-product of the sugar industrymolasses is utilized by distilleries for alcohol fermentation, where these process generates 10-15 m 3 distillery wastewater/m 3 alcohol produced (Christofoletti et al, 2013). With the global ethanol production increasing annually for beverage and fuel purposes the associated wastewater produced is immense [e.g., >40 billion liters in India (Basu et al, 2015) and >300 billion liters in Brazil (da Silva Neto et al, 2020)].…”

Section: Introductionmentioning

confidence: 99%

“…Distillery wastewater is known as spent wash, vinasse, slop, stillage or distillery effluent depending upon the source of sugar used for fermentation. If distilleries are solely based on molasses (as in India), typical chemical oxygen demand (COD) of waste water (called as spent wash) ranges between 80,000 -160,000 ppm and pH in the acidic range (Basu et al, 2015). If the distilleries also use sugar cane juice (as in Brazil), typical COD of wastewater (called as vinasse) is much lower (España-Gamboa et al, 2011) and is around 30,000 ppm.…”

Section: Introductionmentioning

confidence: 99%

Pre-treatment of distillery spent wash (vinasse) with vortex based cavitation and its influence on biogas generation

Nagarajan

Ranade

2020

Bioresource Technology Reports

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Distilleries generate high COD (chemical oxygen demand) wastewater streams that are anaerobically digested to produce biogas with sub-optimal yields. In this work, for the first time, novel vortex-based hydrodynamic cavitation (HC) pre-treatment of these waste streams was investigated for significantly enhancing biogas yields. Molasses spent wash (120,000 ppm COD, India) and vinasse (27,000 ppm COD, Brazil) were pretreated at varying number of passes (between 1 -20) through the HC device at constant inflow, biochemical methanation potential (BMP) was measured and described using a first order model. Vortex-based HC pre-treatment led to 14% enhancement (2 passes) in BMP from spent wash (difficult to digest compared to vinasse) with a net energy gain of 1 GJ/ton COD. 10-22% increase in biogas yields from large-scale industrial spent wash digesters confirmed the laboratory findings. The work presented is useful and can be translated to recalcitrant feedstock for enhancing valorization using vortex-based HC pre-treatment.

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Integrated treatment of molasses distillery wastewater using microfiltration (MF)

Cited by 46 publications

References 11 publications

Distillery Stillage: Characteristics, Treatment, and Valorization

Distillery Stillage: Characteristics, Treatment, and Valorization

Sugarcane biorefineries wastewater: bioremediation technologies for environmental sustainability

Pre-treatment of distillery spent wash (vinasse) with vortex based cavitation and its influence on biogas generation

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