International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 05 | May 2023
p-ISSN: 2395-0072
www.irjet.net
Neutralization of Acidic Effluent from Sugar Mill using Sodium Hydroxide Flakes Yash Inamke1 and Shruti Gore2 1MTech, VIIT, Pune, Maharashtra, India.
2Asst. Prof., VIIT, Pune, Maharashtra, India.
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Abstract - The Sugar industry is one of the most polluting
oxygen demand (COD) concentrations, and generally contains low pH, total dissolved solids, total suspended solids, and total solids. The effluent from sugar mills contains carbohydrates, nutrients, oil, grease, chlorides, sulfates, and heavy metals. As a result, all of these components contribute significantly to their high biochemical oxygen demand (BOD) and chemical oxygen demand (COD). Sugar wastes are dull white in color and usually acidic in nature. The Total suspended solids affect the light intensity of water; suspended solids are the cause of suspended particles inside the water body influencing turbidity and transparency. The pollution effect of sugar waste is attributed to the immediate and high oxygen demand.
industries, not only in terms of the volume of effluent generated but also in terms of its characteristics as well. Most of the sugar industries uses lime as a neutralizer in ETP. In this experiment, Sodium hydroxide flakes (NaOH) were used to neutralize acidic effluent from the sugar mill. The performance of sodium hydroxide flakes used for effluent neutralization was evaluated. The experiment was performed using a jar test and its effects on parameters such as pH, total dissolved solids, total suspended solids, total solids, Chemical Oxygen Demand (COD), and Biochemical Oxygen Demand (BOD). During the production of sugar, a large amount of water is used by the sugar mill for processing, thus generating a large amount of effluent. The amount required for sodium hydroxide to raise pH to 7.5 was 0.20 mg/L which is two to three times lower than the amount required for conventional alkalis to raise pH. The results of the experiment show that the removal efficiency of TDS, TSS, TS, COD, and BOD are 82%, 95%, 86%, 96%, and 98%.
The characteristics of a sugar effluent contain Temperature, Color, pH, DO, BOD, COD, total dissolved solids, total suspended solids, total solids, chlorides, sulfate, oil & grease. It depends largely on the quantity of sugar processed. Sugar mill effluent is highly polluting, which makes industries discharging untreated/partially treated effluent a serious environmental threat. As part of the Indian government's environmental protection measures, very strict regulations are in place for effluent discharge. As a result, proper treatment methods are required to comply with effluent discharge standards. Most of the sugar industries uses lime as a neutralizer in ETP. The purpose of this experiment is to determine the effectiveness of Sodium Hydroxide flakes as a neutralizer for effluent shown in figure 1 and its effects on parameters such as TDS, TSS, TS, COD, and BOD.
Key Words: Sodium hydroxide flakes, pH, TDS, TSS, TS, COD, BOD.
1.INTRODUCTION The sugar industry is one of the most important Argo-based industries in India and has a high impact on the rural economy. India continued to rank second among the countries of the world in sugar production. In India, the sugar industry ranks second in Argo-based industries. The sugar industry is seasonal and operates for 5-6 months in a year. The effluent from the sugar mill is primarily generated from the mill house, boiler blow down, filter cloth, condensates, condensers washing, occasional leakages, and molasses mixed water. The Sugar industry is one of the most polluting industries, not only in terms of the volume of effluent generated but also in terms of its characteristics as well. It generates about 1000 liters of effluent per ton of processed sugar. The volume, concentration, and composition of the effluents arising in the sugar industry are dependent on the type of product being processed, the production program, operating methods, the design of the processing plant, the degree of water management being applied, and subsequently the amount of water is conserved. Sugar mill effluent is characterized by high temperature, high biochemical oxygen demand (BOD), and chemical
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Fig. 1. Sodium Hydroxide Flakes
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