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All Journal Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan
M.Hasbi, M.Hasbi
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Earth & Planetary Sciences

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THE EFFECT OF BIORAFIA DENSITY ON DECREASING NITRATE ON THE SAIL RIVER Sitompul, Dorlan Rotua; Budijono, Budijono; M.Hasbi, M.Hasbi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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ABSTRACT The Sail River has been contaminated with nitrate can be reduced by using biorafia (interweaving of several raffia knot masks that are mashed with shapes resembling duster as a place to attach to microorganisms). This study aimed to determine the effect of the density of biorafia in reducing levels of nitrate contained in the water of the Sail River. The study was conducted in March-April 2019 on the Sail River. This study uses a Completely Randomized Design (CRD) with a single factor, namely biorafia. Using three treatments, namely different densities (P1 = infrequent / 50simple, P2 = moderate / 75impul and P3 = meeting / 100impul), and three replications. Sampling was carried out before and after passing biorafia on artificial trenches with a one-month interval. The results showed that biorafia was able to reduce the levels of nitrate with a decrease in average not much different. The decrease in nitrate ranges from 0.1375-0.33473 mg / L to 0.0750-0.1167 mg / L (35-44%). Biorafia can be used in reducing levels of nitrate. Keywords: Biorafia, Nitrate,raffia
The effectiveness of used plastic bottles as media in the biofilter for reducing MBAS and phosphate in the laundry liquid waste Syah, Firman; M.Hasbi, M.Hasbi; Purwanto, Eko
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 2 (2020): 2 Juli - Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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AbstractUsed plastic bottles can be used for biofilter media as microorganisme may attach in the bottle surface. To understand the effectiveness of the number of plastic bottles in the anaerob tank in reducing MBAS and phosphate in laundry waste, a research has been done in October-December 2019. This research uses used plasctic bottles with 11 cm height and 6 cm diameter. There were 3 treatments applied, namely P1 (25 bottles) with surface area 11.540 cm2,  P2 (50 bottles) with surface area 23.080 cm2 and  P3 (75 bottles) with surface area 34.619 cm2, 3 replications in each treatments. The seeding time of the biofilm was 25 days. The effectiveness of MBAS decrement was 56.3%, 73.7% dan 80.9% in P1, P2, and P3respectively. While the effectiveness of phospate decrement was 54.9%, 73.3% and 85.0%. in P1, P2, and P3 respectively. Based on data obtained, it can be concluded that the biofilter that was completed with plastic bottleswas able to reduce the MBAS dan phosphate in the laundry liquid waste and P3 provided the best result.Keywords: anaerob, bacteri, waste management, plastic bottle re-use 
GROWTH OF Bacillaria sp. AS A PRELIMINARY STEP ON THE METAL TOXICITY TESTING Br Tarigan, Cresentia Karonina; Budijono, Budijono; M.Hasbi, M.Hasbi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 8, No 2 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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                    ABSTRACTMicroalgae are primary producers for aquatic organisms and have the ability to absorb heavy metals up to a certain concentration. One of the microalgae is Bacillaria sp. This research was conducted to determine the ability of Bacillaria sp. as a biota requirement for heavy metal toxicity tests. Observation of growth of Bacillaria sp. carried out for 17 days in order to see all growth phases of Bacillaria sp. The results of this study indicate that there are 5 life phases of Bacillaria sp. namely the lag phase, acceleration phase, exponential phase, retardation phase and death phase. Bacillaria sp. qualified as test biota for heavy metal toxicity test according to the Asean-Canada Cooperative Program on Marine Science Phase II. The cell density of Bacillaria sp. on day 4 or at the beginning of the exponential phase is 1.36 x 106 cells/ml it can be seen that the cell density of Bacillaria sp. exceeds the minimum limit (1x106 cells/ml).Keywords:Bacillaria sp., Exponential, Density, Phytoplankton, Toxicity test
Co-Authors Br Tarigan, Cresentia Karonina Budijono, Budijono Eko Purwanto Firman syah, Firman Sitompul, Dorlan Rotua