Study On The Use Of Biocoagulant Papaya Seeds, Tamarind Seeds and Aluminium Sulfate in Batik Waste

Abstract

Batik was part of the UNESCO Intangible Cultural Heritage in 2009. The processing of batik waste has an impact on the environment, health and high COD and BOD. The high content of COD and BOD above the quality standard must be reduced by using an effective treatment. One of them is the use of natural ingredients that are more environmentally friendly and easily available, such as papaya seeds and tamarind seeds.

The method used is coagulation-flocculation with Jartest flocculator. Testing the results of the treatment was carried out using the duplicate method at the Magelang City Health Laboratory and the Magelang District Health Service Laboratory. The results of the analysis used linear regression with each dose of 1.5 g, 3 g, and 4.5 g of coagulation for 5 minutes at 120 rpm and flocculation for 10 minutes at 60 rpm.

The test results before treatment on BOD (Biological Oxygen Demand) of 532.5 mg/l and COD (Chemical Oxygen Demand) of 1423.59 mg/l. The optimal value was obtained after the addition of the BOD (Biological Oxygen Demand) content, namely tamarind seeds at a dose of 1.5 g of 3.32 mg/l. The optimum value for COD (Chemical Oxygen Demand) is aluminum sulfate (alum) with a dose of 3 g at 300 mg/l. From the coagulants used, the results of reducing BOD and COD were better using tamarind because it contains protein and tannins which act as polyelectrolytes which facilitate the formation of floc.