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PENGARUH CUSTOMER EXPERIENCE TERHADAP CUSTOMER SATISFACTION DAN CUSTOMER LOYALTY INSTITUT FRANÇAIS INDONESIA DI SURABAYA Utami Dewi, Tanti; Nur Ardi Nugroho, Priyambodo
Jurnal Teknologi dan Terapan Bisnis Vol 1 No 02 (2018): Oktober
Publisher : AKADEMI KOMUNITAS SEMEN INDONESIA GRESIK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1015.717 KB)

Bahasa Prancis sebagai bahasa pengantar resmi kedua di Persatuan Bangsa-Bangsa sangat dibutuhkan oleh banyak kalangan sebagai pengantar dalam dunia professional maupun pergaulan. Institut Français Indonesia di Surabaya, memiliki peranan penting dalam memberikan kursus Bahasa Prancis berkualitas dan terpercaya bagi masyarakat Jawa Timur khususnya Surabaya. Kehadirannya dalam lima dekade ini memberikan arti bagi Surabaya.Hingga awal 2012 pemerintah Prancis memutuskan melakukan perubahan dalam manajemen dan penerapan kebijakan-kebijakan operasional. Ternyata berdasarkan statistik selama kurun waktu 2012-2014 terjadi penurunan jumlah siswa. Hal inilah yang melatarbelakangi dilakukan penelitian mengenai pengaruh customer experience terhadap customer satisfaction dan customer loyalty Institut Français Indonesia di Surabaya. Pada penelitian ini, 66 siswa dari kelas lanjutan pada bulan Mei dan Juni dijadikan responden. Hasil penelitian ini kemudian dianalisa menggunakan analisa jalur (path analysis). Customer experience berpengaruh signifikan terhadap customer satisfaction secara langsung sebesar 0,967 dengan arah positif, serta customer experience berpengaruh signifikan terhadap customer loyalty secara langsung sebesar 0,479 dengan arah positif. Begitu dengan customer satisfaction berpengaruh signifikan terhadap customer loyalty secara langsung sebesar 0,485 dengan arah positif. Pengalaman positif yang dirasakan oleh para pelanggan dapat memberikan dampak positif dengan adanya pendaftaran (pembelian kembali) ke jenjang berikutnya, serta membuat mereka mempromosikan Institut Français Indonesia di Surabaya kepada orang lain.

Penyisihan Fluoride dan COD Air Limbah Industri Asam Fosfat Menggunakan Kombinasi Presipitasi dan Elektrokoagulasi Setiawan, Adhi; Arianingtyas, Nadya Ayu; Mayangsari, Novi Eka; Dewi, Tanti Utami
METANA Vol 16, No 2 (2020): Desember 2020
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/metana.v16i2.32775

Proses produksi asam fosfat menghasilkan air limbah dengan kandungan fluoride dan Chemical Oxygen Demand (COD) yang berpotensi mencemari lingkungan jika tidak diolah secara tepat. Kandungan ion fluoride di dalam air dapat menjadi ancaman serius bagi kesehatan manusia karena menyebabkan kerusakan pada gigi dan tulang. Kombinasi presipitasi dan elektrokoagulasi merupakan salah satu alternatif yang efektif untuk menurunkan kandungan fluoride dan COD. Penelitian ini bertujuan menganalisis pengaruh pH presipitasi, tegangan, dan waktu kontak terhadap penyisihan fluoride dan COD pada limbah industri fosfat menggunakan metode presipitasi dan elektrokoagulasi. Proses presipitasi dan elektrokoagulasi dilakukan secara batch. Presipitan menggunakan bahan berupa Ca(OH)2 sedangkan proses elektrokoagulasi menggunakan elektroda aluminium yang tersusun secara monopolar. Pengaturan pH presipitasi menggunakan pH 5, 7, dan 9. Elektrokoagulasi menggunakan variasi waktu kontak 40, 50, dan 60 menit. Variasi tegangan listrik 17, 22, dan 27 V. Hasil penelitian menunjukkan bahwa peningkatan pH meningkatkan efisiensi penyisihan pada proses presipitasi. Peningkatan nilai tegangan listrik dan waktu kontak menyebabkan peningkatan efisiensi penyisihan fluoride dan COD. Efisiensi tertinggi pada proses penyisihan fluoride dan COD diperoleh pada kondisi pH 9, waktu kontak 60 menit dan tegangan 27 volt dengan nilai efisiensi penyisihan fluoride sebesar 99,84% dan efisiensi penyisihan COD sebesar 56,35%.Â The production process of phosphoric acid produces wastewater containing fluoride and COD which has the potential to pollute the environment if not treated properly. The content of fluoride ions in water can be a serious threat to human health because it causes damage to teeth and bones. The combination of precipitation and electrocoagulation is an effective alternative to reduce fluoride and COD content. This study aims to analyze the effect of pH of precipitation, voltage, and contact time on fluoride and COD removal in industrial phosphate waste using precipitation and electrocoagulation methods. The precipitation and electrocoagulation processes are carried out in batches. Precipitant uses a material in the form of Ca (OH) 2, while the electrocoagulation process uses aluminum electrodes that are arranged monopolarly. Setting the pH of the precipitation using pH 5, 7, and 9. Electrocoagulation using a variation of contact time 40, 50, and 60 minutes. Electric voltage variations 17, 22, and 27 V. The results showed that increasing pH increased the removal efficiency in the precipitation process. Increasing the value of the power supply voltage and contact time led to an increase in the efficiency of fluoride and COD removal. The highest efficiency in fluoride and COD removal process was obtained at conditions of pH 9, contact time of 60 minutes and a voltage of 27 volts with a fluoride removal efficiency value of 99.84% and COD removal efficiency of 56.35%.

Penyisihan Fosfat dan Amonium Pada Air Limbah Menggunakan Presipitasi Struvite Dengan Penambahan Bittern Adhi Setiawan; Falenia Firdatul Jannah; Tarikh Azis Ramadani; Tanti Utami Dewi
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol 4, No 1 (2022): JPPL, Maret 2022
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v4i1.1185

The fertilizer industry generally produces wastewater with relatively high ammonium and phosphate content, so processing is necessary so as not to cause eutrophication effects that harm the environment. Struvite precipitation with bittern media was an alternative method to remove struvite content in wastewater. This study aimed to analyze the effect of pH and molar ratio [Mg2+] : [NH4+] : [PO43-] on the struvite precipitation process in reducing the ammonium and phosphate content in the artificial wastewater of the fertilizer industry and to characterize the struvite obtained from the precipitation process. The precipitation process was conducted in batches with various pH and molar ratios [Mg2+]: [NH4+]: [PO43-]. The variation of pH used is 8−10. The molar ratios used are 1.5 : 1.0 : 1.0 and 3.0 : 1.0 : 1.0. Struvite characterization was conducted using SEM-EDX and XRD methods. The results showed that pH and molar ratio had an effect on the efficiency of removal ammonium and phosphate using struvite precipitation. The best pH value and molar ratio that can be used to remove content of ammonium and phosphate is at pH 9 with a molar ratio of [Mg2+] : [NH4+] : [PO43-] 3.0 : 1.0 : 1.0 which results in the removal efficiency of 86.50% and 99.96% respectively. The morphology of struvite obtained from precipitation is irregular rod-shaped with an average size of 28.53 μm. XRD results have detected peaks indicating the struvite phase.

Pengomposan Sampah Kulit Nanas, Kotoran Ayam, Dan Kotoran Sapi Menggunakan Larva Black Soldier Fly (BSF) Ayu Nindyapuspa; Vivin Setiani; Tanti Utami Dewi; Ulvi Pri Astuti; Rachma Dinihaque Pristantia Putri
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol 4, No 1 (2022): JPPL, Maret 2022
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v4i1.1178

Pineapple production which reaches 8.75% of the total production of all fruits in Indonesia produces pineapple peel waste that has not been processed. Therefore, composting with Black Soldier Fly (BSF) larvae was carried out to overcome this problem. Variations in the composition of the compost material used in this study were one hundred percent pineapple peel, a mixture of pineapple skin and cow dung (25:75), and a mixture of pineapple skin and chicken manure (25:75). Temperature, pH, moisture content, C/N and final weight of BSF larvae were analyzed. The weight of the larvae used in each composition of the compost material is fourteen grams. The results showed that the temperature, pH, and moisture content of the compost had met the requirements according to Indonesian National Standard number 19-7030-2004. The C/N ratio of compost with 100% pineapple peel, pineapple skin and cow dung (25:75), and pineapple peel and chicken manure (25:75) were 24.6; 16.3; and 14.2, respectively. The C/N ratio of compost with a composition of one hundred percent pineapple peel did not meet the standard. Compost with a mixture of pineapple skin and livestock manure (cow and chicken) met the standard. The weight gain of the larvae in each reactor was in the range of forty to fifty times the initial weight of the larvae added to the reactor.

STUDI EKSPERIMEN PENGARUH TORREFAKSI PADA KARAKTERISTIK BAHAN BAKAR PADAT DARI BIOMASSA RESIDU HUTAN Tanti Utami Dewi; Priyambodo Nur Ardi Nugroho
Jurnal Konversi Energi dan Manufaktur Vol. 4 No. 2 (2017)
Publisher : Universitas Negeri Jakarta

Torrefaksi saat ini menjadi salah satu metode konversi biomassa yang menarik karena kemampuannya sebagai salah satu pilihan energi terbarukan. Bahan bakar campuran batu bara dengan biomassa yang telah mengalami proses torrefaksi dipandang sebagai bahan bakar yang paling murah saat ini dan merupakan metode yang menjanjikan. Pemilihan bahan bakar biomassa berdasarkan karakteristiknya sangat diperlukan untuk memastikan agar proses pembakaran dapat tercapai dengan baik. Dua tipe residu biomassa dari hutan (tandan sawit kosong dan bambu) telah diteliti dengan berbagai suhu penahanan torrefaksi dan waktu penahanan torrefaksi yang berbeda. Hasil penelitian menunjukkan hubungan positif antara suhu dan waktu torrefaksi dengan kenaikan nilai kalor. Kadar air juga menurun bersamaan dengan semakin tingginya suhu dan makin lamanya waktu torrefaksi. Mass yield dan energy yield biomassa hasil proses torrefaksi juga telah dianalisis. Residu biomassa dari hutan yang telah melalui proses torrefaksi terbukti dapat menggantikan batu bara sebagai bahan bakar energi terbarukan.

Recovery Koagulan dari Sludge WWTP Pembangkit Listrik Tenaga Uap sebagai Alternatif Pengolahan Air Limbah secara Kimia Adhi Setiawan; Ahmad Erlan Afiuddin; Qurrotul Aini; Tanti Utami Dewi
Jurnal Riset Teknologi Industri Vol.12 No.2 Desember 2018
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Proses koagulasi di wastewater treatment plant (WWTP) menghasilkan produk samping berupa limbah lumpur atau sludge dalam jumlah besar serta belum dimanfaatkan secara optimal. Penelitian ini bertujuan untuk melakukan karakterisasi terhadap sludge, menganalisis pengaruh konsentrasi asam klorida pada proses recoveri koagulan, serta menganalisis pengaruh dosis koagulan hasil recovery sludge terhadap removal TSS, Zn, dan Fe. Metode karakterisasi sludge menggunakan SEM-EDX, XRD, dan FTIR. Proses recovery koagulan menggunakan metode pengasaman dengan menggunakan HCl pada konsentrasi 1 N hingga 3 N. Hasil penelitian menunjukkan bahwa sludge memilki kandungan Fe sebesar 69,29% wt dalam bentuk Fe(OH)3 dan Fe2O3. Konsentrasi pengasaman dengan HCl 3N menghasilkan SRP dengan kandungan koagulan Fe yang tertinggi yakni sebesar 52,3 mg/L. Hasil jar tes menunjukkan bahwa penambahan SRP 3 N pada dosis 10 mL/L menghasilkan konsentrasi residual TSS dan Zn paling rendah yakni sebesar 34 mg/L dan 0,01 mg/L. Besarnya persen removal TSS dan Zn pada SRP 3N dengan dosis 10 mL/L masing-masing sebesar 79,4% dan 9,52%. Namun, removal Fe tertinggi pada SRP 1 N dengan dosis 4 mL/L. Jenis dan dosis SRP yang direkomendasikan untuk menurunkan TSS, Fe, dan Zn antara lain SRP 1 N dengan semua dosis yaitu 4 mL/L, 6 mL/L, 8 mL/L, 10 mL/L, serta SRP 1,5 N dan SRP 2 N dengan dosis 4 mL/L.

Penyisihan Fosfat dan Amonium pada Air Limbah Menggunakan Presipitasi Struvite dengan Penambahan Bittern Adhi Setiawan; Falenia Firdatul Jannah; Tarikh Azis Ramadani; Tanti Utami Dewi
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 4 No. 1 (2022): JPPL, Maret 2022
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v4i1.1461

The fertilizer industry generally produces wastewater with relatively high ammonium and phosphate content, so processing is necessary so as not to cause eutrophication effects that harm the environment. Struvite precipitation with bittern media was an alternative method to remove struvite content in wastewater. This study aimed to analyze the effect of pH and molar ratio of Mg2+, NH4+, and PO43- on the struvite precipitation process in reducing the ammonium and phosphate content in the artificial wastewater of the fertilizer industry and to characterize the struvite obtained from the precipitation process. The precipitation process was conducted in batches with various pH and molar ratios Mg2+, NH4+, and PO43-. The variation of pH used is 8−10. The molar ratios used are 1.5, 1.0, 1.0 and 3.0, 1.0 , 1.0. Struvite characterization was conducted using SEM-EDX and XRD methods. The results showed that pH and molar ratio had an effect on the efficiency of removal ammonium and phosphate using struvite precipitation. The best pH value and molar ratio that can be used to remove content of ammonium and phosphate is at pH 9 with a molar ratio of Mg2+, NH4+, PO43- are 3.0 , 1.0, and 1.0 which results in the removal efficiency of 86.50% and 99.96% respectively. The morphology of struvite obtained from precipitation is irregular rod-shaped with an average size of 28.53 μm. XRD results have detected peaks indicating the struvite phase.

Pengomposan Sampah Kulit Nanas, Kotoran Ayam, dan Kotoran Sapi Menggunakan Larva Black Soldier Fly (BSF) Ayu Nindyapuspa; Vivin Setiani; Tanti Utami Dewi; Ulvi Pri Astuti; Rachma Dinihaque Pristantia Putri
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 4 No. 1 (2022): JPPL, Maret 2022
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v4i1.1465

Pineapple production which reaches 8.75% of the total production of all fruits in Indonesia produces pineapple peel waste that has not been processed. Therefore, composting with Black Soldier Fly (BSF) larvae was carried out to overcome this problem. Variations in the composition of the compost material used in this study were one hundred percent pineapple peel, a mixture of pineapple skin and cow dung (25:75), and a mixture of pineapple skin and chicken manure (25:75). Temperature, pH, moisture content, C/N and final weight of BSF larvae were analyzed. The weight of the larvae used in each composition of the compost material is fourteen grams. The results showed that the temperature, pH, and moisture content of the compost had met the requirements according to Indonesian National Standard number 19-7030-2004. The C/N ratio of compost with 100% pineapple peel, pineapple skin and cow dung (25:75), and pineapple peel and chicken manure (25:75) were 24.6; 16.3; and 14.2, respectively. The C/N ratio of compost with a composition of one hundred percent pineapple peel did not meet the standard. Compost with a mixture of pineapple skin and livestock manure (cow and chicken) met the standard. The weight gain of the larvae in each reactor was in the range of forty to fifty times the initial weight of the larvae added to the reactor.

Pengolahan Total Coliform Menggunakan Kombinasi Metode Wetland dan Sinar UV Tanti Utami Dewi; Ulvi Pri Astuti; Ahmad Erlan Afiuddin; Bhagaskara Cipta Linuwih; Novi Eka Mayangsari
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 4 No. 2 (2022): JPPL, September 2022
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v4i2.1493

Total coliform level contained in the effluent of the shipbuilding industry WWTP in East Java has exceeded the threshold value, respectively 6000-15.400 cfu/100 mL. Threshold value of Domestic Wastewater published by Minister of Environment and Forestry Regulation Number 68 in 2016 mentioned that total coliform allowed to discharge to water column is 3000 CFU/100mL. The number of total coliforms in river can cause health problems in humans and animals so that further processing is needed. In this study, a combination of Wetland and UV light disinfection methods was used to reduce total coliform levels. In the wetland method using a Cattail plants (Typha angustifolia) to reduce the total coliform. This study varied the length of contact time (4, 8, and 12 days) in wetlands and irradiation time (10, 20, and 30 minutes) in UV disinfection in order to obtain the best variation in treating total coliforms found in WWTP effluent. The results showed that all variations of the combination of wetland treatment and UV light were able to remove the total coliform concentration below the quality standard. The best combination variation based on the results of the Two Way Anova Analysis obtained a combination method of 4 days of contact time and 10 minutes of irradiation with a P-value of 0.020.

Tanjung Perak Port Solid Waste Composting using Black Soldier Fly Method Ulvi Pri Astuti; Vivin Setiani; Mirna Apriani; Tanti Utami Dewi; Nyoto Sulistiyo
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 19, No 3 (2022): November 2022
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v19i3.578-588

One of the supporting facilities for operational activities at the Tanjung Perak Port is the existence of adequate green open spaces. The type of plant that is widely planted is the Angsana tree. Since 2018, this port has had an innovation to reuse waste from trimming activities to become compost, but the results are not optimal because there is still a lot of compost in the form of whole leaves. In this research, the composting method will be tested using Black Soldier Fly larvae and local microorganisms from banana hump. Compost material in the form of the waste of Angsana leaves is mixed with the waste of mackerel fish which comes from processing activities of mackerel fish food. Variations were made with different feeding regimes for Black Soldier Fly larvae, namely 3 weekly, daily, and weekly with dose of local microorganism banana hump as much as 15 mL/kg. The results of composting showed that the variations of feeding regime have significant effect for compost quality.

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