Removal of Organic Pollutants from Tofu-Processing Wastewater through Anaerobic Treatment Process with Short Hydraulic Retention Time

Darwin, Darwin

doi:10.5755/j01.erem.75.1.21532

Cited by 9 publications

(7 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pH level required for acid-forming bacteria and methane-forming bacteria to grow should be higher than 5.2 and 6.2, respectively, for an acceptable level of enzymatic activity (Pramanik et al, 2019). Then, low pH in the anaerobic digestion may have been caused by a prolonged lag phase of microbial growth (Darwin et al, 2019). This result is in line with the study by Azouma et al (2019), who studied biogas production from pineapple waste.…”

Section: Cumulative Methane Yieldsupporting

confidence: 76%

“…However, a previous study has 22 reported that methane could be generated under acidic condition. Darwin et al (2019) who studied treating tofu-23 processing wastewater by anaerobic treatment found that anaerobic digestion could reduce organic wastes and 24 convert into biogas although the influent was too acidic (pH 5). 25…”

Section: Fig 2 Cumulative Methane Productionmentioning

confidence: 99%

See 1 more Smart Citation

Potential Biogas Production Generated by Mono- and Co-digestion of Food Waste and Fruit Waste (Durian Shell, Dragon Fruit and Pineapple Peel) in Different Mixture Ratio under Anaerobic Condition

Muenmee

Prasertboonyai²

2021

EREM

View full text Add to dashboard Cite

This work investigated the potential of generating biogas from mono-digestion of various substrates such as food and fruit waste (e.g., durian shell, dragon fruit peel and pineapple peel) and co-digestion in different combinations of a co-substrate as food waste as well as different types of fruit waste (durian shell, dragon fruit peel and pineapple peel). The mixture of food waste and fruit waste ratio varied as follows: 75:25, 50:50 and 25:75, which was based on weight. The batch experiments were carried out using 125 ml anaerobic digesters and were incubated for 50 days. For a mono-substrate, food waste produced the highest amount of methane gas (60.63 ± 1.02 ml/gvs) followed by durian shell (34.93 ± 1.30 ml/gvs), pineapple peel (31.70 ± 1.60 ml/gvs), and dragon fruit peel (30.12 ± 1.20 ml/gvs), respectively. The highest amount of methane gas came from food waste mixed with durian shell (FW75:D25), and it was on a higher level than food waste mixed with dragon fruit peel (FW75:DF25) and pineapple peel (FW75:P25). The highest methane gas production of co-digestion which was observed at the proportion of food waste and durian shell was 75:25 and produced higher content of methane gas than the highest methane gas production of mono-digestion (food waste) according to the high organic compound and optimum pH value in the system. The results showed that the co-digestion of durian shell and food waste improved methane production and reduced the startup time compared with their mono-digestion. On the other hand, pineapple peel was not suitable for co-digestion with food waste due to a decreasing pH value in the system.

show abstract

Section: Cumulative Methane Yieldsupporting

confidence: 76%

Section: Fig 2 Cumulative Methane Productionmentioning

confidence: 99%

Potential Biogas Production Generated by Mono- and Co-digestion of Food Waste and Fruit Waste (Durian Shell, Dragon Fruit and Pineapple Peel) in Different Mixture Ratio under Anaerobic Condition

Muenmee

Prasertboonyai²

2021

EREM

View full text Add to dashboard Cite

show abstract

“…The water content was measured by a laboratory heating and drying oven, in which the sample was heated for approx. 24 h at 105 °C (Rice et al 2017;Darwin et al 2019b;Darwin et al 2021b). The flash, fire cloud and pour points were measured using a laboratory hot plate equipped with a digital thermocouple.…”

Section: Resultsmentioning

confidence: 99%

Enhanced biodiesel production from waste cooking oils catalyzed by sodium hydroxide supported on heterogeneous co-catalyst of bentonite clay

Darwin,

Harahap,

Pratama

et al. 2023

Res. Agric. Eng.

View full text Add to dashboard Cite

Various proportions of bentonite clay performing as co-catalysts were evaluated for the production of biodiesel from waste cooking oil (WCO). The results showed that the use of bentonite as a heterogeneous co-catalyst could significantly increase the biodiesel yield by approximately 50% of the control. The heterogeneous co-catalyst of bentonite clay improved the properties of the produced biodiesel including acid number, free fatty acids (FFA), relative density, kinematic viscosity and flash point fulfilling with the standard ASTM limits and the European Biodiesel Standard (EN 14214). The use of bentonite clay in the transesterification of WCO could also enhance the conductivity of the produced biodiesel from 11 to 100 µS•m -1 .

show abstract

“…The process of anaerobic co-digestion of cow-manure and POME was carried out under the continuous operation. Under the anoxic condition, the complete decomposition of organic materials could generate methane gas as the main product [19]. The characteristics of substrates used for the anaerobic composting process would determine the organic decomposition rates, methane productivity and methane yield [20].…”

Section: Resultsmentioning

confidence: 99%

Anaerobic Co-Digestion of Cow Manure and Palm Oil Mill Effluent (POME): Assessment of Methane Production and Biodegradation Efficiency

Darwin¹,

Diana²,

Mardhotillah³

et al. 2021

IJDNE

View full text Add to dashboard Cite

The performance of anaerobic co-digestion of cow manure and POME was evaluated. The anaerobic composting process was carried out by using semi-continuous reactors under the mesophilic condition (35 ± 1℃). The addition of POME to the on-going anaerobic composting of cow manure was applied stepwise within a cycle of HRT (20 days). Results showed that the anaerobic co-digestion reactor could produce methane at about six times higher (7.2 L CH4) than the control reactor (1.3 L CH4). An increasing of POME loaded to the on-going anaerobic composting cow manure culture (4% to 64%) did not affect pH of the culture in which pH was still stable between 7.11 and 7.5. Assessment of biodegradation efficiency revealed that nitrogen removal of the anaerobic co-digestion reactor was six times higher (21%) than the nitrogen removal of the control reactor (3.4%). This suggested that the anaerobic co-digestion reactor performed sufficiently well in which no organic acid as well as ammonia accumulated in the reactor that could be effective to decompose the organic matters.

show abstract

Removal of Organic Pollutants from Tofu-Processing Wastewater through Anaerobic Treatment Process with Short Hydraulic Retention Time

Cited by 9 publications

References 35 publications

Potential Biogas Production Generated by Mono- and Co-digestion of Food Waste and Fruit Waste (Durian Shell, Dragon Fruit and Pineapple Peel) in Different Mixture Ratio under Anaerobic Condition

Potential Biogas Production Generated by Mono- and Co-digestion of Food Waste and Fruit Waste (Durian Shell, Dragon Fruit and Pineapple Peel) in Different Mixture Ratio under Anaerobic Condition

Enhanced biodiesel production from waste cooking oils catalyzed by sodium hydroxide supported on heterogeneous co-catalyst of bentonite clay

Anaerobic Co-Digestion of Cow Manure and Palm Oil Mill Effluent (POME): Assessment of Methane Production and Biodegradation Efficiency

Contact Info

Product

Resources

About