Limaran, Shanaz Ivona Dewi (2023) OPTIMALISASI DEPOSISI SILIKA MELALUI PENURUNAN TEMPERATUR SEBAGAI UPAYA PENCEGAHAN OVERFLOW DI WELL-PAD 30 PT GEO DIPA ENERGI (PERSERO) UNIT DIENG. Other thesis, UPN "Veteran" Yogyajarta.
![[thumbnail of A Skripsi - Shanaz Ivona Dewi Limaran - 114190094.pdf]](http://eprints.upnyk.ac.id/style/images/fileicons/text.png) |
Text
A Skripsi - Shanaz Ivona Dewi Limaran - 114190094.pdf Restricted to Repository staff only Download (18MB) |
|
Text
B Abstrak - Shanaz Ivona Dewi Limaran - 114190094.pdf Download (65kB) |
|
Text
C Cover - Shanaz Ivona Dewi Limaran - 114190094.pdf Download (121kB) |
|
Text
E Daftar Isi - Shanaz Ivona Dewi Limaran - 114190094.pdf Download (189kB) |
|
Text
F Daftar Pustaka - Shanaz Ivona Dewi Limaran - 114190094.pdf Download (155kB) |
|
Text
D Lembar Pengesahan - Shanaz Ivona Dewi Limaran - 114190094.pdf Download (397kB) |
Abstract
xvi
OPTIMALISASI DEPOSISI SILIKA MELALUI PENURUNAN
TEMPERATUR SEBAGAI UPAYA PENCEGAHAN OVERFLOW DI
WELL-PAD 30 PT GEO DIPA ENERGI (PERSERO) UNIT DIENG
Oleh:
Shanaz Ivona Dewi Limaran
114190094
INTISARI
Proses flashing brine di AFT (Atmospheric Flash Tank) menyebabkan brine
menjadi bertekanan rendah dan kadar silika terlarut bertambah di atas kurva
saturasinya. Dalam kondisi brine yang pekat memungkinkan deposisi silika apabila
terjadi penurunan temperatur secara drastis, sehingga dapat berakibat scaling pada
fasilitas hingga overflow karena pendangkalan pada cooling system. Jenis dampak
yang ditimbulkan berupa penurunan kualitas air permukaan dan penurunan indeks
keanekaragaman biota air akibat adanya kandungan nitrat (NO3-N) dan ammonia
(NH3-N) dalam brine. Beberapa kejadian kematian tanaman disebabkan oleh kadar
NaCl yang tinggi dalam brine sehingga tanaman menjadi kering. Oleh sebab itu
diperlukan penangan terhadap deposisi silika melalui optimalisasi dan pemeliharaan
di cooling system untuk mencegah scaling pada fasilitas injeksi dan menghindari
overflow brine. Tujuan penelitian adalah untuk mengetahui laju deposisi silika
sehingga dapat diketahui tingkat efektivitasnya yang kemudian dapat ditentukan
arahan teknis pengelolaannya.
Metode pengumpulan data dilakukan dengan survei dan pemetaan terhadap rona
lingkungan eksisting, pengambilan sampel dilakukan melalui teknik grab sampling
dan pengukuran temperatur di lapangan. Uji laboratorium dilakukan terhadap
konsentrasi silika terlarut, pH, dan sifat fisik tanah, serta dilakukan pengumpulan data
sekunder. Data-data yang telah dihasilkan selanjutnya akan diolah dan dianalisis
secara matematis atas dasar perhitungan dan analisis secara deskriptif sehingga akan
diketahui laju deposisi silika dan efektivitasnya berdasarkan pembobotan nilai SSI-
nya.
Rata-rata laju deposisi silika secara keseluruhan pada open canal yaitu 83.822,89
cc/jam dan pada cooling pond yaitu 13.438,98 cc/jam. Nilai SSI pada inlet open canal
menunjukkan kurva nilai >1 sebesar 1,43; sedangkan outlet open canal dan cooling
pond menunjukkan kurva nilai di bawah dari 1 dengan rata-rata secara berurutan yaitu
0,98 dan 0,86. Efektivitas pengelolaan terhadap deposisi silika berdasarkan nilai SSI-
nya didapatkan sebesar 39,86 %. Dapat disimpulkan bahwa cooling system pada area
Well-PAD 30 belum cukup efektif dalam mendeposisikan silika. Arahan pengelolaan
secara teknis yang direkomendasikan berupa modifikasi waterfall eksisting menjadi
berbentuk cascade & penambahan besi grating; pemasangan water level control;
rekomendasi perkiraan jadwal pembersihan silika; serta pemberdayaan masyarakat
melalui program community development perusahaan dengan sosialisasi pemanfaatan
limbah silika menjadi paving block.
Kata Kunci: Deposisi Silika, Brine Water, Open Canal, Cooling Pond, Temperatur
xvii
OPTIMIZATION OF SILICA DEPOSITION THROUGH TEMPERATURE
DECREASE AS AN OVERFLOW PREVENTION EFFORT AT WELL-PAD 30
PT GEO DIPA ENERGI (PERSERO) UNIT DIENG
By:
Shanaz Ivona Dewi Limaran
114190094
ABSTRACT
The brine flashing process in the AFT (Atmospheric Flash Tank) causes the
brine to become under pressure and the dissolved silica content increases above its
saturation curve. In dense brine conditions, it is possible for silica deposition if there
is a drastic temperature drop, which can result in scaling of the facility to overflow
due to silting of the cooling system. The type of impact caused is a decrease in surface
water quality and a decrease in the diversity index of aquatic biota due to the presence
of nitrate (NO3-N) and ammonia (NH3-N) in the brine. Several incidents of plant death
were caused by high NaCl levels in the brine so that the plants became dry. Therefore,
it is necessary to handle silica deposition through optimizing and maintaining the
cooling system to prevent scaling in injection facilities and avoid brine overflow. The
aim of the research was to determine the deposition rate of silica so that its level of
effectiveness could be determined, which could then be determined by the technical
direction for its management.
The data collection method was carried out by surveying and mapping the
existing environmental baseline, sampling was carried out through grab sampling
techniques and temperature measurements in the field. Laboratory tests were carried
out on the concentration of dissolved silica, pH, and physical properties of the soil,
and secondary data were collected. The data that has been generated will then be
processed and analyzed mathematically on the basis of descriptive calculations and
analysis so that the silica deposition rate and its effectiveness will be known based on
the weighting of the SSI value.
The overall average deposition rate of silica in the open canal is 83,822.89
cc/hour and in the cooling pond is 13,438.98 cc/hour. The SSI value at the open canal
inlet shows a value curve > 1 of 1.43; while the open canal and cooling pond outlets
show a value curve below 1 with an average of 0.98 and 0.86. The management
effectiveness of silica deposition based on the SSI value was 39.86 %. It can be
concluded that the cooling system in the Well-PAD 30 area is not effective enough in
depositing silica. The recommended technical management directives are in the form
of modification of the existing waterfall to a cascade shape & the addition of iron
grating; installation of water level control; recommendations for estimated silica
cleaning schedules; as well as community empowerment through the company's
community development program by socializing the utilization of silica waste into
paving blocks.
Keywords: Silica Deposition, Brine Water, Open Canal, Cooling Pond, Temperature
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Silica Deposition, Brine Water, Open Canal, Cooling Pond, Temperature |
| Subjects: | T Technology > T Technology (General) |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Eko Yuli |
| Date Deposited: | 31 May 2023 07:30 |
| Last Modified: | 31 May 2023 07:30 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/35766 |
Actions (login required)
 |
View Item |