Penanganan Limbah Cair Hasil Produksi Glycerine Pitch Carbon Catalyst (GPCC)

Abstract

PT. XYZ mengelola limbah glycerine pitch (GP) yang dihasilkan dari produk samping proses produksi biodiesel. Kandungan klorin yang tinggi dalam limbah ini menyebabkan penolakan oleh industri semen, serta menimbulkan beban penyimpanan dan distribusi. Proyek ini bertujuan merancang proses produksi GPCC melalui karbonisasi dengan microwave-assisted carbonization (MAC), serta penanganan limbah cair untuk menurunkan parameter pencemar sesuai dengan baku mutu Permen LHK No. 6 tahun 2021. Proses produksi GPCC menghasilkan limbah dari proses karbonisasi dan netralisasi yang berupa limbah cair. Pengolahan limbah cair proses GPCC dilakukan dengan kombinasi netralisasi, koagulasi menggunakan PAC (15 dan 30 mg/L), sedimentasi, dan filtrasi. Hasil pengolahan menunjukkan parameter telah berada dalam ambang baku mutu (pH 6,5, TSS 10,712 mg/L dan TDS 1320-1610 mg/L), kecuali COD yang masih melebihi batas (2478- 2508 mg/L), sehingga diperlukan pengolahan lebih lanjut kimia-fisika seperti ozonisasi, adsorpsi dan filtrasi, maupun penambahan pengolahan secara biologis.

PT XYZ is handling glyceryne pitch (GP) waste generated from a by-product of the biodiesel production process. The high chlorine content in this waste causes rejection by the cement industry, as well as creates storage and distribution burdens. This project aims to design a GPCC production process through carbonization namely microwave-assisted carbonization (MAC), as well as handling of liquid waste to reduce polluting parameters in accordance with the quality standards of Permen LHK No. 6 of 2021. The GPCC production process produces waste from the carbonization process and neutralization in the form of liquid waste. The GPCC process liquid waste treatment is carried out with a combination of neutralization, coagulation using PAC (15 and 30 mg/L), sedimentation, and filtration. The treatment results show that the parameters are within the quality standard threshold (pH 6,5, TSS 10,7-12 mg/L and TDS 1320-1610 mg/L), except for COD which still exceeds the limit (2478-2508 mg/L), so further chemical-physical treatment is required such as ozonation, adsorption and filtration, as well as the addition of biological treatment.