Water Hyacinth Extract Addition Towards Tofu Wastewater Degradation by Anaerobic Treatment

DOI

10.2991/aer.k.211129.072How to use a DOI?

Keywords

tofu wastewater; water hyacinth; anaerobic treatment; cow rumen; biogas

Abstract

Indonesian tofu industries produce wastewater with high amounts and concentrations of organic compounds that pollutes the environment. Biological treatment of anaerobic and aerobic systems can degrade organic compounds and produce appropriate effluents for disposal into the environment. Anaerobic degradation process is highly determined by C/N ratio of the substrate. Tofu wastewater has a low C/N ratio (5.90), therefore other organic materials that have a higher C/N ratio should be added. This study aims to determine the effect of adding water hyacinth extract towards anaerobically degradation of tofu wastewater. Anaerobic systems utilize microorganisms found in cow rumen with mixture substrate of tofu wastewater and water hyacinth extract at volume ratio of 1.25:0.75. Addition of water hyacinth extract produced mixed C/N ratio of 10.49. Anaerobic bioreactor with active volume of 20 L, operated at hydraulic retention time (HRT) for 20 days. With influent COD load of 6,000 mg/L, the anaerobic system was able to remove COD by 92.8% or produced effluent with COD of 431.04 mg/L. Producing biogas accounted for 17,325 mL with highest concentration of methane gas of 56.9% for 35 days. Activated sludge method as an advanced treatment of aerobic systems is recommended to be added to complete the treatments in fulfilling the effluent standard to be discharged into the environment.

Copyright

© 2021 The Authors. Published by Atlantis Press International B.V.

Open Access

This is an open access article under the CC BY-NC license.

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TY  - CONF
AU  - Herawati Budiastuti
AU  - Yuliana Nur Amanah
AU  - Ranggi Octaviani Pratiwi
AU  - Emma Hermawati Muhari
AU  - Laily Isna Ramadhani
PY  - 2021
DA  - 2021/11/30
TI  - Water Hyacinth Extract Addition Towards Tofu Wastewater Degradation by Anaerobic Treatment
BT  - Proceedings of the International Conference on Innovation in Science and Technology (ICIST 2020)
PB  - Atlantis Press
SP  - 341
EP  - 345
SN  - 2352-5401
UR  - https://doi.org/10.2991/aer.k.211129.072
DO  - 10.2991/aer.k.211129.072
ID  - Budiastuti2021
ER  -