ESTIMATION OF METHANE PRODUCTION VIA ANAEROBIC CO-DIGESTION OF FOOD WASTE AND SLUDGE BY BIOCHEMICAL METHANE TEST; [(Anggaran Pengeluaran Metana Melalui Pencernaan Bersama Anaerobik Sisa Makanan dan Enap Cemar oleh Ujian Potensi Metana Biokimia)]

• Published in: Malaysian Journal of Analytical Sciences
• Main Author: Latif N.A.A.; Zaki Z.M.; Chin K.B.; Buyong F.
• Format: Article
• Language: English
• Published: Malaysian Society of Analytical Sciences 2022
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85132597753&partnerID=40&md5=01ecb436c14cc71115d51b1133a352eb

Biochemical methane potential (BMP) tests are extensively used in many studies related to anaerobic co-digestion (AcoD) to evaluate biogas production and determine the potential methane yield between various substrates at specific retention times and parameters. AcoD is a process of mixing two or more substrates in a digester that could help to improve the methane yield as compared to mono-digestion with the same substrates. This study evaluates the methane production efficiency via AcoD of food waste and thickened sludge by using the BMP tests. The substrates used for this study were wastes from non-dairy creamer, coffee, and mixed food waste with sludge. Additionally, thickened sludge as an inoculum was used for the BMP test. The samples characterisation was analysed according to standard and HACH methods. The thickened sludge was set up at a ratio of 1:1 as a control, while the food wastes sample with sludge was set up at a ratio of 1:2. The initial pH was adjusted in a range of 6.5-7. The BMP test setup was done using a 125mL serum bottle in triplicates for 31 days in an incubator at 37oC. The results showed that the highest methane production of the BMP was from thickened sludge itself which is 18.275 ± 3.3 mL CH4/gVS, followed by non-dairy creamer waste with thickened sludge, mixed food waste with sludge and coffee waste with thickened sludge which are 17.865 ± 6.2 mL CH4/gVS, 17.825 ± 0.05 mL CH4/gVS and 14.797 ± 0.01 mL CH4/gVS respectively. In conclusion, the pre-treatments process is highly recommended in order to improve biogas production. © 2022, Malaysian Society of Analytical Sciences. All rights reserved.