Adsorption of Tofu Waste Using Water Hyacinth Leaves Powder for Decreasing Bod and Cod

Abstract

Abstract- Water hyacinth leaves can be utilized in the process of adsorbing organic substances. This study aims to determine the decrease of COD and BOD maximum levels, the optimum mass of water hyacinth leaves powder that used and the optimum adsorption time. This research was done by adsorbing the tofu waste using adsorbent from water hyacinth leaves powder. Adsorption process used the adsorbent mass variation of 2.8; 3.2; 3,4 and 4 gram, and variation of adsorption time is 15, 30, 45, and 60 minutes. The results of adsorption process are then centrifuged, the residue and filtrate will be separated. Then calculated the value of BOD and COD from the filtrate. The decreasing in COD levels in the variation of mass obtained 0; 13.63%; 27.27%; 27.27% and 40.91%, while the decreasing in BOD content was 0; 33.33%; 46.67%; 55.56%; and 73,33%, indicating that the more adsorbent in the tofu waste will decrease the value of BOD and COD while the decreasing of the level will be bigger. The optimum mass analysis results obtained 4 grams on the decrease of BOD and COD. The optimum time of adsorption at COD was 30 minutes while there’s no equilibrium in BOD. Keywords: biomass, water hyacinth leaves, tofu waste.

Efektivitas Karbon Aktif Eceng Gondok (Eichornia crassipes) Pada Pengolahan Limbah Cair Tempe

“…Beberapa adsorben yang pernah dipakai dalam pengolahan limbah cair tempe yaitu karbon aktif dari kayu merbau (Setyaningrum et al, 2019), tongkol jagung, biji asam jawa, zeolite, bentonite dan poly aluminium chloride (PAC) dan serbuk eceng gondok (Khery et al, 2013;Maulani et al, 2021;Rahmasari et al, 2021;Setyaningrum et al, 2019;Trisnadewi et al, 2017;Wicakso et al, 2018). Kondisi optimum dari pengolahan limbah industri tahu tempe dengan menggunakan karbon aktif dari kayu merbau berhasil menurunkan kadar COD sebesar 60,6% dan BOD sebesar 25,5% (Setyaningrum et al, 2019).…”

“…Bentonite dan PAC mampu menyisihkan TSS sebesar 53%, total dissolved solid (TDS) sebesar 95%, BOD sebesar 87%, dan COD sebesar 84% (Maulani et al, 2021). Serbuk eceng gondok yang dioksidasi menggunakan K2Cr2O7 atau KMnO4 mampu menurunkan kadar COD sebesar 13,63-40,91% dan BOD sebesar 33,33-73,33% (Wicakso et al, 2018). Aplikasi mengunkana tawas dan karbon aktif mampu menurunkan kekeruhan sebesar 23,88%, TSS sebesar 29,84 % dan COD sebesar 54,73 % (Nurlina et al, 2015).…”

“…Berdasarkan hasil penelusuran literatur penyisihan yang berhasil dilakukan pada limbah cair tempe dengan berbagai adsorben tersebut masih belum maksimal. Penyisihan COD berkisar antara 23,8-60,6% menggunakan adsorben tunggal (Setyaningrum et al, 2019;Trisnadewi et al, 2017;Wicakso et al, 2018). Penyisihan lebih besar mencapai 54,73-84% didapatkan dengan menggunakan kombinasi adsorben (Maulani et al, 2021;Nurlina et al, 2015).…”

“…Rentang penyisihan TSS berkisar antara 28,67-53%, penurunan turbiditas mencapai 23.88% (Maulani et al, 2021;Nurlina et al, 2015). Temuan penelitian sebelumnya hanya mengubah eceng gondok menjadi serbuk dan belum mampu menurunkan kadar COD sampai dibawah baku mutu lingkungan (Wicakso et al, 2018). Hal inilah yang membedakan penelitian ini dengan penelitian sebelumnya.…”

Pollutant Index Method in Determining the Water Quality Status of the Cimahi River in West Bandung Regency

“…High concentrations of BOD that exceed quality standards cause microbes to become active and decompose organic matter biologically, producing foulsmelling CH4, NH3, and H2S gases [12].…”