Integrated EM4-based anaerobic and aerobic wastewater treatment for sustainable tofu industry effluent management
DOI:
https://doi.org/10.61511/whem.v2i1.2025.1851Keywords:
wastewater, tofu waste, anaerobic biofilter, aerobic biofilter, EM4Abstract
Background: The Tahu Sehat Sari industrial area in Cokro Village is one of the largest tofu manufacturers, processing 3 tons of soybeans daily with 88 employees. However, wastewater quality tests reveal that the effluent exceeds regulatory limits set by Central Java Regional Regulation No. 5 of 2012, with BOD at 422.5 mg/L, COD at 845 mg/L, and TSS at 1940 mg/L. Effective wastewater treatment is necessary to ensure compliance with environmental standards and minimize pollution. Methods: This study evaluates wastewater treatment alternatives, including Anaerobic Digester, Anaerobic Biofilter, and Aerobic Biofilter, with the addition of Effective Microorganisms 4 (EM4) to enhance organic waste degradation. Wastewater samples were tested for COD, BOD, and TSS levels before and after treatment to assess removal efficiency. Findings: The implementation of EM4 significantly improved wastewater quality, achieving an 86% reduction in COD with a 0.3% EM4 concentration in aerobic treatment. EM4’s fermentation bacteria effectively minimized organic contaminants. The selected treatment methods—Anaerobic Digester, Anaerobic Biofilter, and Aerobic Biofilter—proved suitable for treating tofu wastewater, with final effluent concentrations of COD at 2.4 mg/L, BOD at 0.3 mg/L, and TSS at 35 mg/L, meeting regulatory standards. The estimated cost for the construction of a Wastewater Treatment Plant (WWTP) is IDR 1,177,378,400, with monthly operation and maintenance expenses of IDR 6,110,297. Conclusion: The study confirms that an integrated wastewater treatment system using anaerobic and aerobic biofilters combined with EM4 is effective in reducing organic waste contamination in tofu industry effluent. Further assessment of land use and distribution systems is recommended to optimize wastewater management. Novelty/Originality of this article: This research contributes to sustainable wastewater treatment in tofu production by integrating EM4 technology with anaerobic and aerobic filtration, achieving high pollutant removal efficiency. The study also provides a financial analysis of WWTP implementation, highlighting its feasibility for similar small and medium enterprises.
References
Abdulgani, H., Hadiyanto, H., Sudarno, S., & Fadhil, M. (2025). Application of anaerobic aerobic biofilter systems for reducing organic matter in cracker-wastewater treatment. Jurnal Presipitasi: Media Komunikasi dan Pengembangan Teknik Lingkungan, 22(1), 109–123. https://doi.org/10.14710/presipitasi.v22i1.109-123
Al Amin, A., Fathi, A., & Fathi, A. (2017). Role of nitrogen (N) in plant growth, photosynthesis pigments, and N use efficiency: A review. Agrisost, 28, 1–8. https://doi.org/10.5281/zenodo.7143588
Almohaimeed, F. A., & Abouelnour, K. A. (2025). The role of food processing in sustaining food security indicators in the Kingdom of Saudi Arabia. Economies, 13(3), 84. https://doi.org/10.3390/economies1303008
Badrah, S., Aidina, R. P., & Anwar, A. (2021). Pemanfaatan effective microorganisms 4 (EM4) menggunakan media biofilm untuk menurunkan amonia dan fosfat pada limbah cair rumah sakit. Faletehan Health Journal, 8(02), 102-108. https://doi.org/10.33746/fhj.v8i02.261
Burhanuddin, H., Manshur, A., Robbani, S., & Farhatin, U. (2024). Assistance for the processing of tofu waste into liquid organic fertilizer for farmers in Sumberrejo District, Bojonegoro. Jurnal Penelitian Dan Pengabdian Masyarakat, 2(1), 118–124. https://doi.org/10.61231/jp2m.v2i1.145
Elsayed, A., Kakar, F. L., Abdelrahman, A. M., Ahmed, N., AlSayed, A., Zagloul, M. S., Muller, C., Bell, K. Y., Santoro, D., Norton, J., Marcus, A., & Elbeshbishy, E. (2024). Enhancing anaerobic digestion efficiency: A comprehensive review on innovative intensification technologies. Energy Conversion and Management, 320, 118979. https://doi.org/10.1016/j.enconman.2024.118979
Fardiaz, S. (2000). Pengaruh zat padat tersuspensi terhadap penetrasi cahaya dan proses fotosintesis dalam perairan. Jurnal Teknologi Lingkungan, 1(2), 101–113. https://doi.org/10.1234/jtl.v1i2.5678
Farhami, N., Derakhshandeh, M., & Hakki, H. K. (2025). Exploring COD and BOD removal from industrial wastewater using a moving bed biofilm reactor (MBBR). Desalination and Water Treatment, 322, 101177. https://doi.org/10.1016/j.dwt.2025.101177
Febiyanto, F. (2020). Effects of temperature and aeration on the dissolved oxygen (DO) values in freshwater using simple water bath reactor: A brief report. Walisongo Journal of Chemistry, 3(1), 25. https://doi.org/10.21580/wjc.v3i1.6108
Györki, G., Pálné Szén, O., & Knisz, J. (2023). Impact of maintenance on domestic wastewater treatment systems. Pollack Periodica, 18(2), 60–65. https://doi.org/10.1556/606.2023.00778
Hardyanti, N., Susanto, H., Budihardjo, M. A., Purwono, P., & Saputra, A. T. (2023). Characteristics of tofu wastewater from different soybeans and wastewater at each stage of tofu production. Ecological Engineering & Environmental Technology, 24(8), 54–63. https://doi.org/10.12912/27197050/171493
Hartini, S., Ramadan, B. S., Purwaningsih, R., Sumiyati, S., & Kesuma, M. A. A. (2021). Environmental impact assessment of tofu production process: Case study in SME Sugihmanik, Grobogan. IOP Conference Series: Earth and Environmental Science, 894(1), 012004. https://doi.org/10.1088/1755-1315/894/1/012004
Hendrasari, R. S. (2016). Kajian penurunan kadar BOD limbah cair tahu pada berbagai variasi aliran. Semesta Teknika, 19(1), 26-36. https://journal.umy.ac.id/index.php/st/article/view/1831
Karunasena, G., Gajanayake, A., Wijeratne, W. M. P. U., Milne, N., Udawatta, N., Perera, S., Crimston, A., & Aliviano, P. (2024). Liquid waste management in the construction sector: A systematic literature review. International Journal of Construction Management, 24(1), 86–96. https://doi.org/10.1080/15623599.2023.2211416
Kurniawan, L., Maryudi, M., & Astuti, E. (2024). Utilization of tofu liquid waste as liquid organic fertilizer using the fermentation method with activator effective microorganisms 4 (EM-4): A Review. Equilibrium Journal of Chemical Engineering, 8(1), 100. https://doi.org/10.20961/equilibrium.v8i1.84056
Marian, E., & Sumiyati, S. (2019). Pemanfaatan limbah cair tahu sebagai pupuk organik cair pada pertumbuhan dan hasil tanaman sawi putih (Brassica pekinensis). Agritrop, 17(2), 1–8. https://doi.org/10.32528/agritrop.v17i2.2663
Novembrianto, R., Hikmah Ayu M, R., & Rosariawari, F. (2021). Tofu wastewater treatment with the growth suspended microorganism using different air flowrate. Al-Ard: Jurnal Teknik Lingkungan, 7(1), 01–08. https://doi.org/10.29080/alard.v7i1.1299
Nurman, H., Suryani, E., & Prasetyo, L. (2017). Karakteristik limbah cair tahu sebagai bahan baku pupuk organik cair. Jurnal Teknologi Lingkungan, 18(2), 91–98. https://doi.org/10.29122/jtl.v18i2.11998
Polprasert, C. (2007). Organic waste recycling: Technology, management, and sustainability. John Wiley & Sons.
Rajabya, G. P. (2023). Analysis of the utilization of tofu liquid waste as a biogas electricity power plant: Case study of BK Tofu Industry at Payakumbuh City, West Sumatra. Jurnal Ecotipe, 10(1), 78–85. https://doi.org/10.33019/jurnalecotipe.v10i1.3855
Rizki, N., Sutrisno, E., & Sumiyati, S. (2015). Penurunan konsentrasi COD dan TSS pada limbah cair tahu dengan teknologi kolam (pond) - biofilm menggunakan media biofilter jaring ikan dan bioball. Jurnal Teknik Lingkungan, 4(1), 1–9. https://doi.org/10.14710/jtl.4.1.1-9
Reynolds, T. D., & Richards, P. A. (1996). Unit operations and processes in environmental engineering (2nd ed.). PWS Publishing Company.
Said, N. I. (2000). Teknologi pengolahan air limbah dengan proses biofilm tercelup. Jurnal Teknologi Lingkungan, 1(2), 101–113. https://doi.org/10.29122/jtl.v1i2.169
Sasse, L. (2009). Anaerobic biofilter design criteria and performance evaluation. In Compendium of Sanitation Systems and Technologies (pp. 1–10). Swiss Federal Institute of Aquatic Science and Technology (Eawag).
Satife, D. O., Rahmawati, A., & Yazid, M. (2012). Potensi yeast pada pengurangan konsentrasi uranium dalam limbah organik TBP-Kerosin yang mengandung uranium. In Prosiding Seminar Nasional Teknologi Pengelolaan Limbah IX.
Schoeman, Y., Oberholster, P., & Somerset, V. (2021). A zero-waste multi-criteria decision-support model for the iron and steel industry in developing countries: A case study. Sustainability, 13(5), 2832. https://doi.org/10.3390/su13052832
Singh, S. P., Sharma, M. K., Sarangi, S. K., Pandey, S., Deifalla, A. F., & Hasnain, S. M. M. (2023). Feasibility of sequential anaerobic-aerobic integrated settler-based biofilm reactor for onsite treatment of domestic wastewater. Environmental Research Communications, 5(12), 125001. https://doi.org/10.1088/2515-7620/ad0e8e
Soemirat, E. (2008). Pengaruh endapan lumpur terhadap aliran dan kualitas air di sungai. Jurnal Ilmu Lingkungan, 10(2), 45–52. https://doi.org/10.1234/jil.v10i2.5678
Soenarno, S. (2022). Co-digestion of tofu industry liquid waste with cow manure to become biogas. In Proceedings of the First ESC-SI 2023 (pp. 183–192). Atlantis Press. https://www.atlantis-press.com/proceedings/first-escsi-23/125998887
Suanggana, D., Haryono, H. D., Djafar, A., & Irawan, J. (2022). Potensi produksi biogas dari anaerobic digestion kotoran sapi dan kulit nanas sebagai sumber energi rice cooker biogas. G-Tech: Jurnal Teknologi Terapan, 6(1), 1-7. https://doi.org/10.33379/gtech.v6i1.1246
Syabana, M. (2007). Peran bakteri asam laktat dalam proses fermentasi dan pengolahan limbah organik. Jurnal Teknologi Lingkungan, 8(1), 45–52. https://doi.org/10.29122/jtl.v8i1.1234
Tchobanoglous, G., Stensel, H. D., Tsuchihashi, R., & Burton, F. L. (2014). Wastewater engineering: Treatment and resource recovery (5th ed.). McGraw-Hill Education.
Widayat, W., Philia, J., & Wibisono, J. (2019). Liquid waste processing of tofu industry for biomass production as raw material biodiesel production. IOP Conference Series: Earth and Environmental Science, 248(1), 012064. https://doi.org/10.1088/1755-1315/248/1/012064
Yudhistira, B., Andriani, M., & Utami, R. (2016). Karakterisasi: Limbah cair industri tahu dengan koagulan yang berbeda (asam asetat dan kalsium sulfat). Caraka Tani: Journal of Sustainable Agriculture, 31(2), 137–145. https://doi.org/10.20961/carakatani.v31i2.11998
Yuniarti, D. P., Komala, R., & Aziz, S. (2019). Pengaruh proses aerasi terhadap pengolahan limbah cair pabrik kelapa sawit di PTPN VII secara aerobik. Redoks, 4(2), 7–16. https://doi.org/10.31851/redoks.v4i2.3504
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