Chito-chito: chitosan as turbid-color adsorbent on “TEMPE” industrial wastewater

Abstract

Citeurep is tempe industrial center in Bogor, consisting of 300 crafters. Tempe industry will produce waste 3000-5000 liters/ton of products [1]. Tempe wastewater has TDS (25,060 mg/l), TSS (4,012 mg/l), pH (4.16), temperature (75oC), NH3N (26.7 mg/l), BOD (31,380.87 mg/l) and COD (35,398.87 mg/l) and has turbid/brown color which has passed the quality standard for environmentally safe waste [2]. Fisheries industry in Indonesia reached 5.3 million tons/year that will produce wastes such as shrimp shells which reached 65%-85% of the mass [3][4]. Shrimp shells can be processed into chitosan as an effective adsorbent for reducing aquatic-pollutant using Suptijah methods [5][6]. The results showed that chitosan has good performance at pH 6.6 to 6.8 and 175-225 ppm. In these conditions, chitosan can lower the value of 94.33%-95.17% turbidity, TSS 95.10%- 95.82%, BOD 72.09%-79%, COD 76.72%-79.40%, TKN 12.50%-27.82%, NH3 80.84%-82.56%, NO2-N 47.69%-54.74%, NO3-N 19.39%-40.14% [7].Thus, addition chitosan on tempe wastewater before disposal can reduce environmental pollution.