Puspitasari, Dian (2014) Efek durasi pencahayaan pada sistem HRAR untuk menurunkan kandungan minyak dalam air limbah. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kandungan minyak di dalam air limbah industri
perminyakan umumnya bersifat toksik terhadap mikroorganisme.
Selain itu kandungan minyak juga dapat menghambat
perpindahan oksigen dari udara ke dalam air dan mengganggu
proses pengolahan secara biologis. Sistem HRAR diperkirakan
dapat mengatasi hambatan kebutuhan oksigen oleh
mikroorganisme untuk mendegradasi senyawa hidrokarbon
melalui proses fotosintesis alga. Penelitian ini bertujuan mengkaji
pengaruh perpanjangan waktu pencahayaan pada kemampuan
HRAR dalam menurunkan kandungan minyak di dalam limbah.
Penelitian ini dilaksanakan dalam dua tahap, yaitu
penelitian pendahuluan dan penelitian utama. Penelitian
pendahuluan dilakukan utuk mendapatkan range konsentrasi
minyak solar optimum yang dapat ditoleransi oleh alga dengan
menggunakan prameter pH, klorofil A dan MLSS. Konsentrasi
minyak solar optimum yang didapatkan pada penelitian
pendahuluan ini adalah penambahan minyak solar sebesar 519
ppm. Sedangkan range minyak solar yang digunakan pada
penelitian utama adalah penambahan minyak solar sebesar 346
ppm, 519 ppm dan 692 ppm. Selanjutnya pada penelitian utama
digunakan variasi konsentrasi minyak solar dan variasi durasi
pencahayaan. Sedangkan parameter yang diamati adalah
konsentrasi minyak, klorofil A, MLSS, COD, intensitas cahaya,
pH, DO dan suhu. Hasil yang didapatkan dari penelitian ini adalah durasi
pencahayaan selama 12 jam memiliki efek yang lebih baik
terhadap penurunan konsentrasi minyak yang diikuti dengan
baiknya pertumbuhan alga dan bakteri di dalam reaktor
dibandingkan dengan durasi pencahayaan selama 24 jam. Hal ini
dapat terlihat dari penurunan konsentrasi minyak solar pada
reaktor dengan durasi pencahayaan selama 12 jam dan
penambahan minyak solar 346 ppm adalah sebesar 78,4%.
Sedangkan penurunan kandungan minyak solar pada reaktor
dengan penambahan minyak solar 346 ppm dan pencahayaan
selama 24 jam adalah sebesar 73,9%.
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Oil content in petroleum industry wastewater is
generally toxic to microorganisms. It also inhibits the transfer of
oxygen from the air into water and interferes the biological
treatment processes. HRAR system is expected to overcome the
obstacles of oxygen demand by microorganisms to degrade
hydrocarbons through the photosynthesis process of algae. The
aim of this study is to determine the effect of extension of light
exposure time on HRAR ability in reducing the oil content in
wastewater.
A preliminary and a primary study were implemented in
this study. The purpose of the preliminary study was to determine
the optimum range of diesel oil’s concentration that was tolerated
by algae. The parameters used in preliminary study were pH,
chlorophyll a and MLSS. The optimum concentration of diesel oil
obtained in the preliminary study was the addition of 519 ppm.
Based on these preliminary study, the concentration of diesel oil
added to the primary study were 346 ppm, 519 ppm and 692 ppm.
Variations that used in the primary study were variation of diesel
oil concentrations and light exposure times. Moreover, the
parameters that is used in the primary study were oil content,
chlorophyll a, MLSS, COD, light exposure time, temperature, pH,
and DO.
The result from this study is that the duration of
exposure for 12 hours has a better effect to reduce the concentration oil content in reactor. In addition, the reactor which
was exposed for 12 hours has a significant growth of algae and
bacteria than the reactor which was exposed for 24 hours. It is
showed from the reduction of the diesel oil’s concentration in the
reactor during the exposure time to 12 hours and the addition of
346 ppm diesel oil were 78,4%. Besides, the reduction of diesel
oil content in the reactor with the addition of diesel oil 346 ppm
and lighting for 24 hours was equal to 73,9%.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSL 628.35 Pus e |
| Uncontrolled Keywords: | Alga; durasi pencahayaan ; HRAR; miyak solar |
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering > TD646 Sewage--Purification |
| Divisions: | Faculty of Architecture, Design, and Planning > Regional and Urban Planning > 35201-(S1) Undergraduate Thesis |
| Depositing User: | - Taufiq Rahmanu |
| Date Deposited: | 16 Jul 2019 06:48 |
| Last Modified: | 07 Mar 2024 03:56 |
| URI: | http://repository.its.ac.id/id/eprint/64128 |
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