Jurnal Sains & Teknologi Lingkungan

SCREENING OF PHOSPHATE SOLUBILIZING MICROORGANISMS COLLECTED FROM POST TIN MINING: POTENCY FOR FUTURE MINING REHABILITATION

Dewi Wulandari, S.Hut., M.Agr., Ph.D — 2023-01-31

Tin mining produced massive tailings which dispersed across the land in the post-tin mining area, transforming the landscape into a hilly or basin landscape. The dominated white silica sand in this area is prone to erosion from water and wind, resulting in soil nutrition deficiency, meanwhile, heavy metal levels were found to be elevated. This condition makes it difficult for organisms to live in such a degraded post-tin mining area. Phosphate solubilizing microorganisms (PSM) contribute to phosphate availability by dissolving both fertilizers and bounded P in soil. This study aimed to select indigenous PSM collected from post-tin mining areas. Zea mays spp., the tested plant, was grown in sterilized sand to avoid the possible nutrient content, particularly phosphate, in the soil. Rock phosphate Granufos (containing 20% P₂O₅) was applied in sterilized sand (v: v= 1:100) as the source of limited and insoluble P. The 17 indigenous PSM were tested by inoculating them into Zea mays spp. growing in sterilized sand. Non-inoculated Zea mays spp. were prepared as well as control. Inoculation of 17 indigenous PSM significantly had higher soil available phosphor in comparison to control. Two PSM of P7 and P15 significantly had higher shoot concentrations among treatments. The isolate of P5 had the highest shoot dry weight among treatments. Overall, all PSM inoculations improved growth performance due to increased soil available P and improved shoot P uptake. These findings suggest that indigenous PSM potentially fills nutrient deficiencies, particularly P as a macronutrient needed to rehabilitate degraded post-tin mining areas.

Penurunan Chemical Oxygen Demand (COD) Dan Fosfat (PO4-P) Limbah Laundry Menggunakan EM4 dan Mikroalga Spirulina sp

Kristin Ari Fitria — 2023-01-31

Laundry waste containing COD and PO4-P levels exceeds the quality standard so that it is released directly into the water body due to eutrophication. One technology to reduce COD and PO4-P uses symbiosis of Spirulina sp and EM4 microalgae. The purpose of this study was to examine the EM4 survey (0%, 5%, and 10%), aeration and residence time of 3 days, 6 days and 9 days for pH, COD and PO4-P in waste treatment using microbial symbiosis Spirulina sp and EM4 . Microalgae culture Spirulina sp using microalgae seedlings from Biological Laboratotrum University PGRI Adi Buana Surabaya, and culture carried out for 35 days to obtain a chlorophyll a concentration of 4.1 mg/L. EM4 before use was activated by fermentation for 7 days. Waste treatment is carried out with a laboratory-scale batch system using a 5 L volume glass reactor. The results showed EM4 concentration, aeration and residence time evaluation of the reduction in COD and PO4-P. PH during the study was stable around 8.1 - 8.3, the highest COD and PO4-P reduction in the reactor with the addition of 5% EM4 with aeration on the 3rd day with a final COD concentration of 283.5 mg/L with a decrease of 81,75%, and a final PO4-P concentration of 11.25 m /L with a reduction of 48.15%.

ANALISIS KELAYAKAN NUTRIEN ANORGANIK JENIS N, P, DAN Si UNTUK KEHIDUPAN FITOPLANKTON DI PERAIRAN PESISIR TOMPOTANA TAKALAR SULAWESI SELATAN

Rahmadi Tambaru — 2023-01-31

Abstract

Inorganic nutrient types such as nitrates (N), phosphates (P), and silicates (Si) are widely absorbed by phytoplankton. All three types of nutrients are very important for their growth. Through the process of photosynthesis, the three nutrients are converted into food reserves in the form of organic compounds such as carbohydrates. The results of the photosynthesis process are used by other organisms in the tropics to grow. The purpose of this study was to analyze the distribution of inorganic nutrients of type N (nitrate), P (phosphate), and Si (silicate) for phytoplankton life. The research was carried out from June to October 2021 at three stations in the coastal waters of Tompotana, Tanakeke Islands District, Takalar Regency, South Sulawesi. At the three stations, water sampling was carried out for the purposes of phytoplankton identification and measurement of physico-chemical parameters of the waters. Activities carried out in the laboratory such as phytoplankton identification, nitrate, phosphate and silicate measurements. Based on the analysis of variance, nitrate and phosphate concentrations were not significantly different (p > 0.05) between stations, on the contrary silicate concentrations actually differed significantly (p < 0.05). N, P, and Si nutrients can still be absorbed and used by phytoplankton to grow even though they are not optimal. A total of 4 classes and 24 types of phytoplankton were identified. The four classes in question are Bacillariophyceae, Dinophyceae, Cyanophyceae, and Coscinodiscophyceae. From the results of the Pearsons correlation analysis, only nitrates had a significant effect on phytoplankton abundance in Tompotana waters (p<0.05).

WATER QUALITY STATUS OF DUG WELLS IN THE WORK AREA OF SIX PUBLIC HEALTH CENTERS OF KULON PROGO REGENCY

Nur Iswanto — 2023-01-31

Research has been carried out to test the quality of dug well water on physical, chemical, and biological parameters in the working areas of the Samigaluh I, Girimulyo I, Sentolo I, Pengasih II, Wates, and Galur I Public Health Centers in Kulon Progo Regency. The sample consisted of 60 dug wells with 16 dug wells with low pollution risk based on the results of environmental health inspections and 44 dug wells with moderate pollution risk. the results of the calculation of the pollution index according to the Minister of Health Regulation No. 32 of 2017, of the 60 wells that were sampled for measuring water quality, there were 76.67% wells with lightly polluted water quality status and 23.33% wells with good water quality status. This is in accordance with the estimated risk of pollution based on the location of the well.

Penentuan Status Mutu Air Sungai Winongo Pada Parameter Fosfat dan Nitrat, Menggunakan Metode Storet, Indeks Pencemaran, CCMEWQI dan BCWQI

Kemal Reza — 2023-01-31

Sungai Winongo merupakan sungai yang berada di wilayah Provinsi Daerah Istimewa Yogyakarta. Sungai ini melintasi 3 kabupaten/kota yakni Kabupaten Sleman, Kota Yogyakarta, dan Kabupaten Bantul. Dengan letaknya ini menjadikan sungai tersebut tidak lepas dari aktivitas masyarakat setempat, sehingga mempengaruhi kualitas air dari sungai tersebut. Penelitian ini dilakukan dengan tujuan untuk menguji status kualitas air Sungai Winongo menggunakan 4 metode indeks kualitas air, yakni metode storet, indeks pencemaran, CCMEWQI dan BCWQI, juga bertujuan untuk mengetahui metode yang sesuai pada penelitian ini. Penelitian ini menggunakan data sekunder yang diambil dari laman yang dikelola oleh Kementerian Lingkungan Hidup dan Kehutanan, Dinas Lingkungan Hidup dan Kehutanan Provinsi Daerah Istimewa Yogyakarta, Dinas lingkungan Hidup dan Kehutanan Kota Yogyakarta dan parameter yang diuji adalah parameter kimia yakni fosfat dan nitrat. Tingginya konsentrasi parameter ini dapat menunjukkan adanya pencemaran di suatu perairan.
Adapun pada metode indeks Pencemaraan, didapatkan hasil tercemar ringan. Pada metode Storet, didapatkan hasil tercemar sedang hingga berat. Pada metode CCMEWQI didapatkan hasil sangat buruk. Serta pada metode BCWQI didapatkan hasil sedang.Untuk metode yang sesuai pada penelitian ini adala metode Indeks Pencemaran.

ANALISIS STATUS MUTU AIR SUNGAI BANJAR DESA BANJAR BARA KECAMATAN GAPURA KABUPATEN SUMENEP MENGGUNAKAN METODE STORET

Rodu Dhuha Afrianisa — 2023-01-31

Banjar river in West Banjar Village, Gapura District, Sumenep Regency, is used by the local community for bathing, washing and toilet activities. This activity was carried out directly into the river, causing river water pollution. In addition to the bathing and washing activities in the river, there was tofu wastewater deliberately dumped directly into the Banjar River. Pollution load increased in river. Under these conditions, research is needed to determine the amount of pollution in the Banjar River and determine the status of water quality to describe the level of water pollution. Quantitative descriptive method is the approach used in this test using the paraThe quantitativ OD,BOD, COD, pH, TSS. Water quality standarts is guided by PP RI Number 22 of 2021 while the regulations for determining water quality status using the storet method are guided by KepMen LH No.115 of 2003. The Banjar River is divided into 4 segments based on pollutant sources and the characteristics of the Banjar river. Segment determination characteristics include kilometers from downstream, length and geographic coordinates. All water quality parameters were analyzed for ,trends in concentration changes and correlations between parameters. The test results show that based on the COD, TSS and pH parameters in the Banjar river meet the quality standards while the ,DO and BOD parameters for each sampling point produce values that exceed the quality standards. Water quality status based on the storet method at points A, B, D, and E scores between -8 until -10 with the status of "Slightly Polluted" while point C has a value of -12 with the status of "Moderately Polluted".