Biomethanation of tofu liquid waste using two-stage anaerobic fermentation system

Iriani, Purwinda; Utami, Sri; Suprianti, Yanti

doi:10.1063/1.5062722

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…The biogas plant is a name often given to digesters that treat waste or sewage into biogas. Biogas itself is a technology that utilizes biodegradable manure or waste that will be fermented from complex organic materials to simple materials through anaerobic processes [1], [2], [3], [4]. During the process, microorganisms convert biomass waste into biogas in the form of methane gas and several other gases such as carbon dioxide.…”

Section: Introductionmentioning

confidence: 99%

Implementation of Automatic Monitoring and Control System in Balloon Digester Type’s Biogas Plant from Tofu Waste Using Ultrasonic Distance Sensor

Hidayanti¹,

Wati²,

Sumardi³

2021

International Journal on Advanced Science, Engineering and Information Technology

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Biogas plant is a name often given to digesters that treat waste or sewage into biogas. The monitoring system is an important process to know the quality and quantity of gas produced and understand the processes inside the plant to achieve the optimum process. The monitoring process can be carried out by measuring the volume of biogas collected in the gas holder and the concentration of biogas produced (especially CH4 gas). The manual method of monitoring and control system used a pressure gauge to estimate the volume of biogas. An automatic device was designed and tested for monitoring and controlling gasbag volume by using an ultrasonic sensor. This device measures the distance between the sensor to the surface of the gasbag and calculates it into volume. The sensors contained in this device had a good level of performance with a percentage error of 0.2% and a standard deviation of 0.32 cm. At the same time, the system design has a good level of performance to calculate the volume with a percentage value of 2.51% and a standard deviation of 0.18 cm. The designed system also has proper performance response, shown by the LED indicator turns off and the socket turns on when it reaches the setpoint. The results showed that the volume of the gasbag used in the plant had a maximum capacity of 102.984 kiloliters and a minimum capacity of 58.857 kiloliters, with a total filling time of 30.5 hours and a usage time of up to 12.5 hours.

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Section: Introductionmentioning

confidence: 99%

Implementation of Automatic Monitoring and Control System in Balloon Digester Type’s Biogas Plant from Tofu Waste Using Ultrasonic Distance Sensor

Hidayanti¹,

Wati²,

Sumardi³

2021

International Journal on Advanced Science, Engineering and Information Technology

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A review: biogas production from tofu liquid waste

Budiyono

Syaichurrozi

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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The tofu consumption will increase in the future. As consequent, the tofu production increases significantly. In other side, the amount of tofu wastes also increases. The solid waste can be utilized as solid compost but the liquid waste is discharged directly to the waster bodies at the moment. The latter is potential to be used as biogas feedstock. Some important factors affecting biogas rate need to be considered such as power Hydrogen (pH), Chemical Oxygen Demand (COD) to Nitrogen ratio, Total solid (TS) content, biological agent addition, initial concentration and two-stage anaerobic digestion. Furthermore, purification of the biogas formed by digestion of the tofu liquid waste is needed to be conducted to increase the methane content and decrease carbon dioxide (CO2) and hydrogensulfide (H2S) content. The H2S has to be removed prior to CO2 removal. The H2S can be removed by biofiltration and CO2 can be removed by biological absorption with help of microalgae. The effluent of anaerobic digester (digestate) may still contain high pollutant so it can be used as nutrient sources for microalgae. The zero waste system for tofu industries is successfully proposed in this paper. Future trend in treating tofu liquid waste in not only for biogas production butalso for biohydrogen production.

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Biomethanation of tofu liquid waste using two-stage anaerobic fermentation system

Cited by 2 publications

References 11 publications

Implementation of Automatic Monitoring and Control System in Balloon Digester Type’s Biogas Plant from Tofu Waste Using Ultrasonic Distance Sensor

Implementation of Automatic Monitoring and Control System in Balloon Digester Type’s Biogas Plant from Tofu Waste Using Ultrasonic Distance Sensor

A review: biogas production from tofu liquid waste

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