Acceleration Effects of Microbial Inoculum on Palm Oil Mill Organic Waste Composting

Yeoh, C.Y.; Chin, Nyuk Ling; Tan, Cher Siang; Ooi, H.S.

doi:10.1080/1065657x.2011.10736989

Cited by 9 publications

(6 citation statements)

References 32 publications

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“…4, the pH of all the bioreactors, except bioreactor B, decreased in early stage of composting. Due to the fermentative metabolism it seems the large amount of organic acid is produced [3,15,25]. Of course, due to the higher process speed in reactor B, this reduction in the pH has not been observed.…”

Section: Resultsmentioning

confidence: 98%

“…Awasthi et al [3] evaluated the inoculation effect on the process by windrow composting for 35 days and showed that the carbon to nitrogen ratio of organic municipal waste was changed from about 36 to about 17. Yeoh et al [25] also studied the effects of inoculation on composting of palm oil organic waste in laboratory scale reactor. According to their research, carbon to nitrogen ratio reduced from 38.26 to 18.31 during the 63 days.…”

Section: Monitoring Of Toc Tkn and C/n Ratio During Compost Productionmentioning

confidence: 99%

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Improving municipal solid waste compost process by cycle time reduction through inoculation of Aspergillus niger

Heidarzadeh

Amani

Javadian

2019

J Environ Health Sci Engineer

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A lack of understanding about the effect of microorganism inoculation on compost production and relatively expensive downstream processing are the main obstacles towards an economic compost production. Our work tries to fill this gap. For this, influence of inoculation on the composting of organic fraction of municipal solid waste (OFMSW) to produce compost with higher agronomic value was evaluated. Three similar aerated bioreactors (A, B and C) with the same size and shape in laboratory scale designed. Reactor A was inoculated with the Aspergillus niger IBRC-M 30095, reactor B was inoculated with old compost and reactor C was used as a control. During the composting process temperature, moisture, pH, and electrical conductivity (EC) were evaluated. Also, the ratio of carbon to nitrogen (C/N) and germination index (GI) were measured in during process to evaluate compost maturity. The results of this study showed that the C/Ns decreased to about 63.37%, 59.6% and 46% for bioreactors B, A and control, respectively. Also maximum GI and temperature reached to about 138% and 59°C in reactor B. Furthermore, our results showed that inoculation with this microorganism reduces process time to 18 days that is better than the results of other researchers and thus results in cost savings. However, we think, Aspergillus niger is appropriate candidate for compost production as a model.

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Section: Resultsmentioning

confidence: 98%

Section: Monitoring Of Toc Tkn and C/n Ratio During Compost Productionmentioning

confidence: 99%

Improving municipal solid waste compost process by cycle time reduction through inoculation of Aspergillus niger

Heidarzadeh

Amani

Javadian

2019

J Environ Health Sci Engineer

View full text Add to dashboard Cite

show abstract

“…pH value was determined in a 1:10 (w/v) water-soluble extract using a Jenway 3510 pH-meter and combined glass electrode (Keison Products, Chelmsford, UK) standardized with pH 7.00 and 4.00 standard buffer solutions (Merck, Darmstadt, Germany). Moisture content (%) was assessed by oven-drying the samples at 105 °C to constant weight, and OM content (%) was determined by gravimetric loss on ignition (Yeoh et al 2011 ). From OM results, TOC percentages and biodegradability coefficients ( K b ) were calculated as follows (Kebibeche et al 2019 ; Rashad et al 2010 ): where OM b and OM e are organic matter contents at the beginning and end, respectively, of the composting process.…”

Section: Methodsmentioning

confidence: 99%

Effect of bacterial inoculation on co-composting of lavender (Lavandula angustifolia Mill.) waste and cattle manure

et al. 2021

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The primary purpose of this study was to investigate the influence of Cellulomonas flavigena and Streptomyces viridosporus, as a bacterial inoculant, on the compostability of post-extraction lavender waste. The major physicochemical, microbiological, and biological properties of the composting materials were monitored for 161 days. The technology developed was shown to improve the compostability of recalcitrant herbal residues. The use of lavender waste beneficially affected the composting process by extending the thermophilic phase, accelerating the degradation of organic matter, and elevating the viable counts of useful microorganisms; however, adverse effects were also observed, including an increased carbon-to-nitrogen ratio (19.05) and a decreased germination index (93.4%). Bacterial inoculation was found to preserve the nitrogen content (2.50%) and improve the efficiency of biodegradation. The Salmonella- and Escherichia coli-free final composting products were mature, stable, and ready for soil application. To the authors’ knowledge, no previous research has investigated the compostability of lavender waste. Likewise, this is the first study that has used strains of C. flavigena and S. viridosporus in combination to facilitate a composting process.

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“…At the end of composting, the texture of all composts had crumbled. Yeoh et al [17] found that the mixture of EFB, POME and some fungal resulted in fragile compost texture at the end of composting.…”

Section: Quality Of Compost Productmentioning

confidence: 99%

“…Various attempts have been tried in EFB composting to improve EFB compost quality. Experiments have been widely developed both in the supply aspect of various nitrogen sources such as poultry litter, chicken manure, goat dung and cow dung, and in the addition of microbial sources from palm oil mill effluent (POME), decanter cake slurry and multi fungal [10,11,12,13,14,15,16,17].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Particle Size of Empty Fruit Bunch and Ratio of Biosludge of Pulp and Paper on Biochemical Changes in Composting Process

et al. 2019

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The abundance of empty fruit bunches (EFB) is a result of many palm oil industries increasing their crude palm oil production. Composting is a good, environmentally friendly alternative to overcome EFB. Two different ratios of EFB with biosludge of pulp and paper of 1 : 1 and 3 : 2, respectively, were used in this composting. The particle size of EFB was set into three different sizes of 0.5; 1.5 and 2.5 cm. The best treatment that was obtained from this study was SR4 where the EFB particle size was 1.5 cm, and the ratio between EFB and biosludge of pulp and paper was 3 : 2, respectively. The nitrogen value of SR4 increased from 1.41% to 2.71%, and C/N ratio decreased from 36.74 to 12.17 in 90 days. The population peak of bacteria of SR4 in the thermopilic phase achieved about 33.67 x 1010 cfu/g. These two treatment combinations had shown an increase in EFB composting efficiency.

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Acceleration Effects of Microbial Inoculum on Palm Oil Mill Organic Waste Composting

Cited by 9 publications

References 32 publications

Improving municipal solid waste compost process by cycle time reduction through inoculation of Aspergillus niger

Improving municipal solid waste compost process by cycle time reduction through inoculation of Aspergillus niger

Effect of bacterial inoculation on co-composting of lavender (Lavandula angustifolia Mill.) waste and cattle manure

The Effect of Particle Size of Empty Fruit Bunch and Ratio of Biosludge of Pulp and Paper on Biochemical Changes in Composting Process

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