scholarly journals Anaerobic Co-Digestion of Oil Palm Frond Waste with Cow Manure for Biogas Production: Influence of a Stepwise Organic Loading on the Methane Productivity)

Author(s):  
DARWIN ◽  
◽  
MARDHOTILLAH ◽  
ATMADIAN PRATAMA ◽  
◽  
...  

Anaerobic co-digestion of oil palm frond waste with cow-manure was evaluated. The study aimed to evaluate a stepwise organic load with an increase solid concentration to the on-going anaerobic digestion of cow manure. The anaerobic digestion process was operated in continuous mode under the mesophilic condition. Results showed that the maximum methane productivity of 1700 ml CH4∙day-1 was obtained when the anaerobic co-digestion of OPFW and cow manure was loaded with the substrate concentration between 4 and 8% TS. The pH culture dropped dramatically from 6.9 to 6.3 when substrate concentration was increased from 10 to 12% TS. The acidic pH had restricted the conversion of organic materials in which the COD removal was less than 25% removal. This study is exceedingly notable for the industrial development of waste management processes, which handle and treat tons of organic wastes daily.

2020 ◽  
Vol 5 (2) ◽  
pp. 210-216
Author(s):  
Atmadian Pratama ◽  
Ramayanty Bulan ◽  
Darwin Darwin

Abstrak. Pemanfaatan limbah peternakan sapi (kotoran sapi) sebagai sumber bahan bakar dalam bentuk biogas merupakan salah satu alternatif yang sangat tepat untuk meningkatkan nilai tambah bagi masyarakat petani. Pemanfaatan kotoran ternak sebagai sumber energi, tidak mengurangi jumlah pupuk organik yang bersumber dari kotoran ternak. Hal ini karena pada pembuatan biogas kotoran ternak yang sudah diproses dikembalikan ke kondisi semula yang diambil hanya gas metana (CH4) yang digunakan sebagai bahan bakar. Kotoran ternak yang sudah diproses pada pembuatan biogas dipindahkan ke tempat lebih kering, dan bila sudah kering dapat disimpan dalam karung untuk penggunaan selanjutnya sebagai pupuk organik. Tandan kosong sawit (TKS) merupakan limbah dari pabrik kelapa sawit yang pemanfaatnya masih terbatas sebagai pupuk organik yang memiliki nilai tambah yang rendah. Setiap produksi kelapa sawit menghasilkan limbah berupa tandan kosong sawit  sebesar 23%, sehingga berdasarkan produksi kelapa sawit tahun 2010 dan 2011 berpotensi dihasilkan limbah tandan kosong sawit sebesar 5 juta ton. Akumulasi limbah TKS dari tahun ke tahun jika tidak dimanfaatkan secara optimal maka dapat berakibat buruk bagi lingkungan. Penelitian ini bertujuan untuk melihat potensi produksi biogas melalui teknologi anaerobik digesi (anaerobic digestion) kotoran sapi dan anaerobik co-digesi kotoran sapi dengan limbah TKS. Hasil penelitian menunjukkan bahwa pada proses fermentasi dengan hydraulic retention time (HRT) 25 hari dan pemberian suhu panas yang sama terdapat hasil yang berbeda terhadap produksi biogas kotoran sapi digesi dan juga kotoran sapi co-digesi dengan tepung TKS dengan hasil produksi biogas total lebih tinggi pada fermentasi co-digesi, dimana produksi gas yang dihasilkan adalah 1.015 mL pada kotoran sapi digesi dan 13.830  mL pada kotoran sapi co-digesi. Penambahan tepung TKS meningkatkan nutrisi substrat yang dimanfaatkan mikroba untuk menghasilkan gas metan, namun tetap memperhatikan tingkat ke optimuman derajat keasaman (pH) pada angka 6,8-7,5.Production of Biogas from Cattle Manure Digestion and Co-Digestion with Oil Palm Empty Fruit Bunch under Digestive Anaerobic MethodAbstract. Utilization of livestock waste (manure) as biogas is one of the most appropriate alternatives to overcome the rising prices of fertilizers and fuel oil scarcity. The use of livestock manure as an energy source, does not reduce the amount of organic fertilizer that comes from livestock manure. This is because in the production of biogas manure that has been processed is returned to its original condition, only methane (CH4) is used as fuel. Livestock manure that has been processed in the making of biogas is moved to a drier place, and when it is dry it can be stored in a sack for further use as fertilizer. Oil palm empty fruit bunches (TKS) are waste from palm oil mills is still limited use as organic fertilizer and has low added value. Each palm oil production produces waste in the form of 23% oil palm empty fruit bunches, so that according to the palm production on 2010 and 2011, the potential production of this waste could reach 5 million tons. The accumulation of this waste from year to year will harm our environment. This study aims to look at the potential for biogas production from cow manure digestion and co-digestion with palm oil fruit bunch waste under the anaerobic process. Results showed that for 25 days hydraulic retention time (HRT) and the use of mesophilic temperature, the biogas production by using anaerobic co-digestion of cow manure with TKS (13,830 mL) was higher than the biogas production by using the anaerobic digestion of cow manure (1,015 mL). The addition of TKS flour had increased the nutrient of substrate used by microbes to produce methane gas, but the acidity (pH)of substrate should be controlled at 6.8-7.5.  


Author(s):  
F S Hashim ◽  
H W Yussof ◽  
M A K M Zahari ◽  
R A Rahman ◽  
R M Illias

2014 ◽  
Vol 893 ◽  
pp. 488-491 ◽  
Author(s):  
Elfarizanis Baharudin ◽  
Alyani Ismail ◽  
Adam Reda Hasan Alhawari ◽  
Edi Syams Zainudin ◽  
Dayang L.A. Majid ◽  
...  

This paper presents the results on dielectric properties of pulverized material based on agricultural waste namely oil palm frond and pineapple leaf fiber for microwave absorber application in the X-band frequency range. The investigation is started by identifying the pulverized materials permittivities and loss tangents using coaxial probe technique, followed by density measurement comprising the determination of bulk and solid densities. Then, by using dielectric mixture model, the solid particle dielectric properties were determined. It is observed that the air properties give quite an effect on the permittivity and loss tangent of the pulverized materials. It is also found that the lower the material density the higher material dielectric constant will be. Furthermore, the results show that, both oil palm frond and pineapple leaf fiber are potential to be X-band absorber with average dielectric constant of 4.40 and 3.38 respectively. The loss tangents for both materials were observed to be more than 0.1 which mark them as lossy materials.


Author(s):  
Siti Nur Ridhwah Muhamed Ramli ◽  
Tengku Elida Tengku Zainal Mulok ◽  
Sabiha Hanim Mohd Salleh ◽  
Khalilah Abdul Khalil ◽  
Othman Ahmad ◽  
...  

2020 ◽  
Vol 21 (5) ◽  
Author(s):  
Roni Pazla ◽  
Novirman Jamarun ◽  
Fauzia Agustin ◽  
Mardiati Zain ◽  
Arief Arief ◽  
...  

Abstract. Pazla R, Jamarun N, Agustin F, Zain M, Cahyani NO. 2020. Effects of supplementation with phosphorus, calcium and manganese during oil palm frond fermentation by Phanerochaete chrysosporium on ligninase enzyme activity. Biodiversitas 21: 1833-1838. The objective of this study was to evaluate the effects of supplementation with phosphorus (P) in combination with calcium (Ca) and manganese (Mn) during oil palm frond (OPF) fermentation by Phanerochaete chrysosporium on ligninase enzyme activity and lignin degradation. This study was carried out using a randomized complete design with 3 treatments (addition of P, Ca and Mn) and 5 replicates. The following treatments were performed: T1 (P 1000 + Ca 2000 + Mn 150 ppm), T2 (P 1500 + Ca 2000 + Mn 150 ppm), and T3  (P 2000 + Ca 2000 +Mn 150 ppm). The data were subjected to an analysis of variance (ANOVA), and differences between treatment means were tested using Duncan's multiple range test (DMRT). The parameters measured were as follows: lignin peroxidase (LiP) activity (U/mL), manganese peroxidase (MnP) activity (U/mL), crude protein (CP) content (%), crude fiber (CF) content (%) and the decrease in lignin (%). The results revealed a significant increase in LiP activity and CP content and a decrease in the lignin content (p<0.05) by the addition of P in the T3 treatment. However, the treatment nonsignificantly increased (p>0.05) MnP activity and significantly decreased (P<0.05) the CF content. In conclusion, supplementation of the OPF fermentation process with P 2000, Ca 2000, and Mn 150 ppm resulted in the highest ligninase enzyme activity and in decreased lignin content.


2020 ◽  
Vol 15 (1) ◽  
pp. 253-263
Author(s):  
Sharmeela Matali ◽  
Norazah Abd Rahman ◽  
Siti Shawalliah Idris ◽  
Nurhafizah Yaacob

Torrefaction is a thermal conversion method extensively used for improving the properties of biomass. Usually this process is conducted within a temperature range of 200-300 °C under an inert atmosphere with residence time up to 60 minutes. This work aimed to study the kinetic of thermal degradation of oil palm frond pellet (OPFP) as solid biofuel for bioenergy production. The kinetics of OPFP during torrefaction was studied using frequently used iso-conversional model fitting (Coats-Redfern (CR)) and integral model-free (Kissinger-Akahira-Sunose (KAS)) methods in order to provide effective apparent activation energy as a function of conversion. The thermal degradation experiments were conducted at four heating rates of 5, 10, 15, and 20 °C/min in a thermogravimetric analyzer (TGA) under non-oxidative atmosphere. The results revealed that thermal decomposition kinetics of OPFP during torrefaction is significantly influenced by the severity of torrefaction temperature. Via Coats-Redfern method, torrefaction degradation reaction mechanism follows that of reaction order with n = 1. The activation energy values were 239.03 kJ/mol and 109.28 kJ/mol based on KAS and CR models, respectively. Copyright © 2020 BCREC Group. All rights reserved 


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