Optimasi pengolahan limbah cair karet remah menggunakan Mikroalga Indigen dalam menurunkan kadar BOD, COD, TSS

Abstract

A study of waste water treatment technology using indigenous microalgae from waste water crumb rubber industry was done. This aims of study to use the isolated microalgae in variously pH (7, 8, 9) and concentration 5%, 10%, 15%, 20% of indigenous microalgae as a degradating Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD) and Total Suspended Solid (TSS). Stages of sewage treatment conducted in this study with comprehensive solution methode was isolation and screening indigenous microalgae ot treated waste sites, characterization microalgae, cultivation doubling microalgae and test performance of microalgae from liquid industrial waste crumb rubber. The isolate of microalgae with pH variation and concentration of indigenous microlagae has potency to reduce waste water crumb rubber. The result show that the type of microalgae as a result of identification is Chlorella vulgari. In pH variation (7, 8, 9 ) and concentration of indigenous microalgae (5%, 10%, 15%, 20%), we found that the the best result to degradated BOD, COD, and TSS as namely as pH 7 with concentration of microalga 15% was 36.84 mg/l (83.48%) for BOD, pH 7 with concentration of microalgae 20% was 88.20 mg/l (76.91%) for COD, pH 8 with concentration of microalgae 5% was 0.91 mg/l (92.67%) for TSS.

Keywords : BOD, COD, crumb rubber, indigenuos microalgae, TSS

Abstrak

Telah dilakukan penelitian teknologi pengolahan limbah cair karet remah menggunakan mikroalga indigen. Penelitian ini untuk memanfaatkan mikroalga hasil isolasi dengan memvariasikan pH dan konsentrasi mikroalga dalam menurunkan kadar Biologycal Oxygen Demand (BOD), Chemycal Oxygen Demand (COD) dan Total Suspended Solid (TSS). Tahapan pengolahan limbah yang dilakukan pada penelitian ini dengan metode Comprehensive Solution adalah isolasi dan skrining mikroalga indigen dari limbah yang diolah, karakterisasi mikroalga, pengembangbiakan, penggandaan dan menguji kinerja mikroalga terhadap limbah cair industri crumb rubber. Mikroalga hasil isolasi diperlakuan pada pH dan konsentrasi mikroalga berturut turut yaitu 7, 8, 9 dan 5%, 10%, 15%, 20% untuk pengolahan limbah. Hasil isolasi mikroalga diperoleh satu jenis mikroakga indigen yaitu Chlorella vulgari dan perlakuan pH dan konsentrasi mikroalga mampu menurunkan kadar BOD, COD, TSS, dimana perlakuan terbaik yaitu pada pH 7 dengan konsentrasi mikroalga 10% yaitu 36,84 mg/l (32,84%) untuk BOD, perlakuan pH 7 dan konsentrasi 20% untuk 88,20 mg/l (60%) untuk BOD, dan perlakuan pH 8 dan konsentrasi 5% yaitu 0.91 mg/l (15%) untuk TSS.

Kata kunci : BOD, COD, karet remah, mikroalga indigen, TSS