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Application of Agro-industrial Solid Waste as Biochar for Iron (II) Removal from Aqueous Solution Rusnam Rusnam; Nika Rahma Yanti; Aninda Tifani Puari; Nurmala Sari
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 13, No 1 (2024): March 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i1.155-164

In recent years, various industrial activities have introduced a high concentration of iron in the waterbody which causes serious problem to environment. This paper proposed the application of Exhausted Coffee Husk (ECH) as the biosorbent (BS) for removing iron (Fe) (II) in the aqueous solution. The ECH was carbonized into biochar before performing biosorption of the heavy metal ion. The effect of carbonization temperature, time and rate on the performance of the ECH biochar for removing Fe (II) were evaluated. The percentage of removal efficiency (RE) and the capacity of biosorption (mg/g) were considered as the determining parameters. The pyrolysis temperature was varied in a range of 200-600 °C with 50 °C of interval, while the time was in between 1h – 3h with a n interval of 0.5 h, and the temperature gradient of 5 – 25°C/min. The results showed that the temperature had a significant effect on the properties of the ECH biochar as BS for Fe (II). The temperature of 550 °C, at 1.5 h of time and 25 °C/min was chosen as the suggested carbonization temperature of biochar from ECH for biosorption of Fe (II). Keywords: Agro-industrial solid waste, Biosorption, Carbonization, Exhausted coffee husk (ECH), Heavy metal.

Response Surface Methodology (RSM) for Optimization Carbonization Parameters of Exhausted Coffee Husk for Iron Removal from Aqueous Solution Aninda T. Puari; Nika R. Yanti; Nurmala Sari; Rusnam Rusnam
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 13, No 3 (2024): September 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i3.637-649

In this study, biochar derived from exhausted coffee husk (ECH) was used as biosorbent for removing Iron (II) from aqueous solution. The aim of this study was to improve the biosorption capacity of the biosorbent from agricultural solid waste and its usability for Fe²⁺ removal. The biosorption performance of ECH biochar was optimized through carbonization parameters: temperature, time, and temperature gradient. Response Surface Methodology (RSM) based on multivariate analysis was employed to evaluate the biosorption performance of ECH biochar for Fe²⁺ biosorption. The optimum performance predicted through Box-Behnken design experiment. The optimal combination of the three parameters was 549.37°C, 1.98 h and 21.98°C/min. At the optimal condition the removal efficiency (RE) was predicted to be 107.01% and biosorption capacity (qt) was 5.11 mg/g. SEM-EDX, FT-IR and XRD analysis were conducted in this study to evaluate the biosorption mechanism of ECH biochar on the iron ion. The results showed that ion exchange existed on the surface of the ECH biochar during the biosorption. Additionally, the presence of functional groups on the ECH biochar surface responsible for Fe(II) binding. Overall, the findings of this study suggested an eco-friendly strategy for optimizing the removal of Iron (II) from polluted water by the biosorption onto ECH biochar. Keywords: Biochar, Biosorption capacity, Box-Behnken design, Temperature, Time

ANALISIS PENILAIAN KEBERLANJUTAN IRIGASI MENGGUNAKAN METODE AHP (Analitical Hierarcy Process) PADA DAERAH IRIGASI AIR DINGIN Pramana Illahi, Fajar Setyawan; Arlius, Feri; Rusnam, Rusnam
Jurnal Teknologi Pertanian Andalas Vol 28, No 2 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jtpa.28.2.%p.2024

Daerah Irigasi Air Dingin merupakan daerah irigasi yang berlokasi di Kota Padang. Konsep irigasi berkelanjutan merupakan sasaran dari perencanaan untuk penyelenggaraan kegiatan pembangunan kedepan. Penelitian ini bertujuan untuk memperoleh nilai analisis dan gambaran mengenai kondisi terkini dari Sistem Irigasi pada Daerah Irigasi Air Dingin sesuai nilai skala prioritas penanganan untuk pengelolaan daerah irigasi kedepan berdasarkan aspek sosial, aspek ekonomi, aspek teknis dan aspek lingkungan. Metode penelitian yang digunakan dalam penelitian ini menggunakan metode AHP (Analitical Hierarcy Process). Metode AHP digunakan untuk menentukan dan menganalisis dari skala prioritas penanganan perencanaan keberlanjutan irigasi. Hasil dari penelitian yang telah dilakukan memperlihatkan kondisi 4 aspek dalam penanganan menggunakan AHP pada daerah irigasi Air Dingin. Hasil penilaian yang telah dilakukan dengan melihat status dari empat aspek penilaian yang terdiri dari aspek sosial dengan nilai 18,82 %, aspek ekonomi dengan nilai 8,53%, aspek teknis dengan nilai 18,43 %, dan aspek lingkungan dengan nilai 25,05 %, dan menunjukkan bahwa total nilai empat aspek yang dinyatakan diperoleh nilai keberlanjutan yaitu 70,84 % yang artinya Daerah Irigasi Air Dingin bisa dipertahankan sebagai daerah irigasi yang berkelanjutan untuk masa sekarang dan masa yang akan datang, sehingga bisa digunakan dalam pengambilan suatu keputusan perencanaan dan pemerataan pembangunan kedepannya.

Biosorption Performance of Biochar from Exhausted Kahwa Coffee on Cadmium Removal Under Various Operational Parameters Nika Rahma Yanti; Aninda Tifani Puari; Frisca Lora Amalya; Rusnam Rusnam; Rahmi Awalina
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 14, No 3 (2025): June 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i3.764-771

The primary goal of this study was to investigate the biosorption performance of biochar derived from exhausted kahwa coffee (EKC) on removing heavy metal ion, Cd²⁺ in the solution. The operational parameters, for instance pH, dosage and contact time, were varied in a certain range and the efficiency and the capacity of removal were determined. The pH was in a range of 5 – 11, while the biochar dosage in a range of 0.075 – 0.15 g and the contact time was in between 30 – 180 minutes. The batch biosorption test showed that the EKC biochar had higher removal performance in alkaline condition, with a proposed pH of 10. Meanwhile, the applied dosage showed that addition of 0.1 g EKC biochar was more effective than adding more dosage. Furthermore, the batch experiments showed that 60 minutes of biosorption process resulted in more effective removal compared to the longer biosorption time. According to the ANOVA analysis on the three conditions, it was shown that the pH and contact time had significant effects on the removal performance of EKC biochar on cadmium ion in the solution. Keywords: Biochar, biosorption, Exhausted kahwa coffee, Heavy metal ion, Operational parameters.

Analysis of Irrigation Modernization Readiness Using FAHP Method Berliana Larasati; Delvi Yanti; Rusnam Rusnam
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 14, No 2 (2025): April 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i2.437-447

Irrigation modernization is a solution proposed to achieve an effective, efficient, and sustainable participatory irrigation management system. The purpose of this study was to measure the value of irrigation modernization readiness (IKMI) and determine the priority order of the Batang Anai Irrigation Area (IA). The IKMI method used 5 criteria for irrigation modernization (reliability of water supply, water and irrigation resource facilities and infrastructure, management of water and irrigation resources systems, water and irrigation resource management institutions, and human resources) and determines the priority order for modernization preparation using the Fuzzy Analytical Hierarchy Process method. Direct observation activities were carried out for the pillars of irrigation infrastructure and water availability, while interviews and questionnaires were used to assess management systems, management institutions, and human resources. The IKMI value 67.50 for the Batang Anai IA implies modernization is postponed, and irrigation system improvements can be carried out for 1-2 years. The priority order for irrigation modernization is water availability, management institutions, irrigation management, irrigation infrastructure, and human resources. Recommended actions for modernization readiness include checking the water supply system, normalizing irrigation channels, repairing damaged irrigation infrastructure, increasing farmer participation through socialization and training activities, and building synergy between irrigation managers. Keywords: FAHP, IKMI, Irrigation, Modernization, Sustainability.

Application of Agro-industrial Solid Waste as Biochar for Iron (II) Removal from Aqueous Solution Rusnam, Rusnam; Yanti, Nika Rahma; Puari, Aninda Tifani; Sari, Nurmala
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 13 No. 1 (2024): March 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i1.155-164

In recent years, various industrial activities have introduced a high concentration of iron in the waterbody which causes serious problem to environment. This paper proposed the application of Exhausted Coffee Husk (ECH) as the biosorbent (BS) for removing iron (Fe) (II) in the aqueous solution. The ECH was carbonized into biochar before performing biosorption of the heavy metal ion. The effect of carbonization temperature, time and rate on the performance of the ECH biochar for removing Fe (II) were evaluated. The percentage of removal efficiency (RE) and the capacity of biosorption (mg/g) were considered as the determining parameters. The pyrolysis temperature was varied in a range of 200-600 °C with 50 °C of interval, while the time was in between 1h – 3h with a n interval of 0.5 h, and the temperature gradient of 5 – 25°C/min. The results showed that the temperature had a significant effect on the properties of the ECH biochar as BS for Fe (II). The temperature of 550 °C, at 1.5 h of time and 25 °C/min was chosen as the suggested carbonization temperature of biochar from ECH for biosorption of Fe (II). Keywords: Agro-industrial solid waste, Biosorption, Carbonization, Exhausted coffee husk (ECH), Heavy metal.

Response Surface Methodology (RSM) for Optimization Carbonization Parameters of Exhausted Coffee Husk for Iron Removal from Aqueous Solution Puari, Aninda T.; Yanti, Nika R.; Sari, Nurmala; Rusnam, Rusnam
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 13 No. 3 (2024): September 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i3.637-649

In this study, biochar derived from exhausted coffee husk (ECH) was used as biosorbent for removing Iron (II) from aqueous solution. The aim of this study was to improve the biosorption capacity of the biosorbent from agricultural solid waste and its usability for Fe²⁺ removal. The biosorption performance of ECH biochar was optimized through carbonization parameters: temperature, time, and temperature gradient. Response Surface Methodology (RSM) based on multivariate analysis was employed to evaluate the biosorption performance of ECH biochar for Fe²⁺ biosorption. The optimum performance predicted through Box-Behnken design experiment. The optimal combination of the three parameters was 549.37°C, 1.98 h and 21.98°C/min. At the optimal condition the removal efficiency (RE) was predicted to be 107.01% and biosorption capacity (qt) was 5.11 mg/g. SEM-EDX, FT-IR and XRD analysis were conducted in this study to evaluate the biosorption mechanism of ECH biochar on the iron ion. The results showed that ion exchange existed on the surface of the ECH biochar during the biosorption. Additionally, the presence of functional groups on the ECH biochar surface responsible for Fe(II) binding. Overall, the findings of this study suggested an eco-friendly strategy for optimizing the removal of Iron (II) from polluted water by the biosorption onto ECH biochar. Keywords: Biochar, Biosorption capacity, Box-Behnken design, Temperature, Time

Biosorption Performance of Biochar from Exhausted Kahwa Coffee on Cadmium Removal Under Various Operational Parameters Yanti, Nika Rahma; Puari, Aninda Tifani; Amalya, Frisca Lora; Rusnam, Rusnam; Awalina, Rahmi
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 3 (2025): June 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i3.764-771

The primary goal of this study was to investigate the biosorption performance of biochar derived from exhausted kahwa coffee (EKC) on removing heavy metal ion, Cd²⁺ in the solution. The operational parameters, for instance pH, dosage and contact time, were varied in a certain range and the efficiency and the capacity of removal were determined. The pH was in a range of 5 – 11, while the biochar dosage in a range of 0.075 – 0.15 g and the contact time was in between 30 – 180 minutes. The batch biosorption test showed that the EKC biochar had higher removal performance in alkaline condition, with a proposed pH of 10. Meanwhile, the applied dosage showed that addition of 0.1 g EKC biochar was more effective than adding more dosage. Furthermore, the batch experiments showed that 60 minutes of biosorption process resulted in more effective removal compared to the longer biosorption time. According to the ANOVA analysis on the three conditions, it was shown that the pH and contact time had significant effects on the removal performance of EKC biochar on cadmium ion in the solution. Keywords: Biochar, biosorption, Exhausted kahwa coffee, Heavy metal ion, Operational parameters.

Analysis of Irrigation Modernization Readiness Using FAHP Method Larasati, Berliana; Yanti, Delvi; Rusnam, Rusnam
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 2 (2025): April 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i2.437-447

Irrigation modernization is a solution proposed to achieve an effective, efficient, and sustainable participatory irrigation management system. The purpose of this study was to measure the value of irrigation modernization readiness (IKMI) and determine the priority order of the Batang Anai Irrigation Area (IA). The IKMI method used 5 criteria for irrigation modernization (reliability of water supply, water and irrigation resource facilities and infrastructure, management of water and irrigation resources systems, water and irrigation resource management institutions, and human resources) and determines the priority order for modernization preparation using the Fuzzy Analytical Hierarchy Process method. Direct observation activities were carried out for the pillars of irrigation infrastructure and water availability, while interviews and questionnaires were used to assess management systems, management institutions, and human resources. The IKMI value 67.50 for the Batang Anai IA implies modernization is postponed, and irrigation system improvements can be carried out for 1-2 years. The priority order for irrigation modernization is water availability, management institutions, irrigation management, irrigation infrastructure, and human resources. Recommended actions for modernization readiness include checking the water supply system, normalizing irrigation channels, repairing damaged irrigation infrastructure, increasing farmer participation through socialization and training activities, and building synergy between irrigation managers. Keywords: FAHP, IKMI, Irrigation, Modernization, Sustainability.

ANALISIS KESESUAIAN LAHAN TANAMAN UBI KAYU (Manihot esculenta C.) DENGAN METODE GROWING DEGREE DAYS Yanti, Delvi; Shalihah, Nadiyatus; Safitri, Imelda; Rusnam, Rusnam
Jurnal Teknologi Pertanian Andalas Vol 27 No 2 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jtpa.27.2.185-209.2023

Tujuan dari penelitian adalah menentukan tingkat kesesuaian lahan tanaman ubi kayu di Provinsi Sumatera Barat berbasis Growing Degree Days (GDD) secara spasial dan temporal. Parameter yang digunakan yaitu curah hujan, kelerengan, penggunaan lahan, tekstur tanah, dan pH tanah. Semua parameter dikelompokkan menjadi satu atribut dengan cara overlay menggunakan aplikasi ArcGIS, kemudian dilakukan pembandingan (matching) dengan syarat tumbuh tanaman ubi kayu untuk kesesuaian lahan, dan dilanjutkan dengan pemberian scoring. Analisis dilanjutkan dengan menentukan nilai Growing Degree Days (GDD) pada setiap titik pengamatan masing-masing skenario waktu tanam yang diolah menggunakan data suhu. Skenario waktu tanam yang digunakan pada penelitian ini sebanyak 12 skenario waktu tanam. Hasil penelitian menunjukkan Provinsi Sumatera Barat memiliki lahan yang potensial untuk pengembangan tanaman ubi kayu, kelas sangat sesuai (S1) seluas 879.921,97 Ha dan kelas sesuai (S2) seluas 1.437.152,41 (39,92%). Waktu tanam yang paling optimal untuk tanaman ubi kayu berdasarkan nilai GDD untuk wilayah Sumatera Barat yaitu pada bulan Oktober. Kabupaten Lima Puluh Kota, Pasaman, Pasaman Barat, Pesisir Selatan, dan Solok Selatan memiliki potensi yang tinggi untuk dilakukan pengembangan tanaman ubi kayu karena pada wilayah ini memiliki kecocokan pada lahan (sangat sesuai) S1 dan sesuai (S2) yang luas (> 200.000 ha), serta niai GDD wilayahnya sesuai dengan nilai GDD untuk ubi kayu.

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