Abstract
Vinasse, which is commonly referred to as stillage, is a aqueous by-product of bioethanol processing. This side-product is yielded in a very large quantity in bioethanol industry since the production of 1 L of ethanol will generate 13 L of vinasse. Hence it is become a problem of bioethanol industry since vinasse waste doesnt have economic value and it is harmful to the environment. This industrial waste has high COD and BOD, high acidity, and high temperature when it is discharged from the bottom of distillation unit. To overwhelmed this drawbacks, it is crucial to attempt reduction of the negative characteristic of vinasse as well as creation of added value of vinasse. In fact, vinasse contains a considerable amount of potassium and organic matter which is beneficial for plant growth and improving the soil fertility. Thus, in this work, vinasse was utilized as raw material for organic fertilizer. Vinasse waste was formulated with other sugarcane industrial waste (filter cake and boiler ash), and NPK fertilizer in various composition to yield solid Organo-Mineral Fertilizer (OMF). Among all the composition of OMF, It was demonstrated that vinasse formulated with 3, 6, and 9% of NPK fulfilled the Indonesian National Standar (SNI) of solid fertilizer. Thus these types of OMF were used to fertilize tomato plant. The effects of vinasse-based OMF on some growth indices of tomato plant were examined. It was revealed that vinasse fertilizer formulated with 9% of NPK exhibited the best impact to the tomato plant growth.
Highlights
Challenge related to the massive liquid waste resulted from the bioethanol process, in which the Bioetanol plays an important role in production of 1 liter of bioethanol will generate 13 industrial sector since it is necessitated as organic liter of vinasse (Garcia et al, 2017)
Several treatment methods have been proposed to diminish the negative impact of vinasse waste, such as applying activated sludge, anaerobic filter, ozonation process, as well as other bioprocessing, anaerobic digestion (AD), and chemical-based processes, to reduce COD color and turbidity (Cabrera-Diaz et al, 2016)
The Organic Mineral Fertilizer (OMF) formulation was varied as follows: OMF A types were composed from vinasse, which were blended with 0, 3, 6, and 9% of NPK, and labeled as OMF A, OMF A3, OMF A6 and OMF A9, Table 1
Summary
Challenge related to the massive liquid waste resulted from the bioethanol process, in which the Bioetanol plays an important role in production of 1 liter of bioethanol will generate 13 industrial sector since it is necessitated as organic liter of vinasse (Garcia et al, 2017). Vinasse was formulated with other sugarcane industry wastes (filter cake and boiler ash), and it was blended with small amount of urea and NPK fertilizer in various formulation. To ascertain the effectiveness of OMF as fertilizer, the effects of solid OMF on the tomato plant growth (height of the plant, number of leaves, diameter of the tomato plant’s stem, age of flowering, and age to produce fruit) were observed. Vinasse was mixed with other feed-stocks (boiler ash, filter cake, urea and NPK fertilizer) in a certain formulation. OMF types which fulfill the Indonesian Standard were applied on tomato plants to observe their effects on the plant’s growth. Observation on the tomato plants was conducted every day to find out the effects of OMF on tomato plant’s growth (height, number of leaves, stem diameter, age to start flowering, age to begin bearing the fruit and number of fruits).
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