The Study Of Removal Efficiency Of Blended Aloe Vera And Poly Aluminum Chloride As Coagulant In Textile Wastewater Treatment

Abstract

Ethiopia has various textile industries in existence. Textile wastewater production in the country has expanded, causing environmental and health hazards. Coagulation, a treatment approach, employs synthetic or semi-natural coagulants. However, these have limitations, such as pH sensitivity, inefficiency, low-temperature water inefficiency, and poor health consequences. Therefore; the objective of this study was to study the effectiveness of Polyaluminum Chloride and Aloe vera as a blended coagulant for the treatment of textile wastewater discharged from Adama Industrial Park. Peeled Aloe vera powder (250 g) was mixed with a 1:1 ratio of polyaluminum Chloride (PAC). The coagulation experiments were carried out using Jar-test apparatus in order to study the effect of blended coagulant as well as optimum condition of coagulation by varying some operational parameters such as dose of blended coagulant (100 to 350 ppm of 10% stock solution), pH (4-10), and mixing time (10-60), while the amount of de-colorant was kept constant at 250 ppm (5% stock solution). Color, Turbidity, TSS, COD, BOD, and pH were selected as dependent variable of the experiment to show material effectiveness and measured following APHA 2000 standard procedure. The optimum conditions for the efficient use of blended PAC and Aloe vera as a coagulant were 300ppm of coagulant dose, pH 6, and 40 minutes of mixing time. At this optimum condition the removal efficiency with rapid mixing of 150rpm for 3 minutes and slow mixing of 50 rpm for 40 minutes and 20 minutes of the settling time for Color, Turbidity, TSS, COD, and BOD, was 95.2%, 99.7%, 99.6%, 85.2%, and 83.2% respectively from textile Wastewater. Hence, the uses of blended Polyaluminum Chloride and Aloe Vera as coagulant in the presence of 250ppm decolorant is found to be effective for removal of aforementioned parameters.