Pengaruh Penambahan Extracellular Polymeric Substance (EPS) Sebagai Biostimulan Terhadap Laju Degradasi Lumpur IPAL PT. Indofood CBP

PT. Indofood CBP as one of the food industry that produces ingredients as its product does not miss from sludge treatment issues. The sludge inflicts troubles on the environment and PT. Indofood CBP, since there is no effective handling and processing. Extracellular Polymeric Substances (EPS) as one of alternative sludge treatment. By varying volume of the sludge: 300 gr, 400 gr, and 450 gr, and mass of the EPS: 350 gr, 400 gr, and 450 gr DW, thus it could be indicated that the more EPS are given and the less amount of sludge volume then a greater degradation of sludge. Obtained data shows the reduction of COD is 65,16% in reactor 1, 69,15% in reactor 2, 81,78% in reactor 3, 53,19% in reactor 4, 57,85% in reactor 5, 65,82% in reactor 6, 44,55% in reactor 7, 45,88% in reactor 8, 47,21% in reactor 9, 36.57% in control reactor. And the reduction of BOD is 59,29% in reactor 1, 60,62% in reactor 2, 65,04% in reactor 3, 51,77% in reactor 4, 52,65% in reactor 5, 55,75% in reactor 6, 37,61% in reactor 7, 39,82% in reactor 8, 44.69% in reactor 9, 35,84% in control reactor

Studi Kemampuan Vertical Subsurface Flow Constructed Wetland Dalam Menyisihkan Konsentrasi Tss, TDS, Dan Orp Pada Lindi Mengggunakan Tumbuhan Alang-alang (Typha Angustifolia)

In general, the leachate contains organic and inorganic substances with a high concentration that are toxic. Leachate TPS Industrial Estate Terboyo have TSS content of 530 mg / l, TDS 1930 ppm, and ORP value was 193 mv. Therefore, the processing of leachate is very important before being dumped directly into the recipient's body of water in order not give a bad influence on the quality of the environment. One of the technologies to manipulate the leachate i.e. using constructed wetlands. This research aims to know the decrease in concentration of TSS, TDS, and ORP with the system sub surface flow constructed wetland. The type of plant that used in this research is Typha angustifolia which has been used in several previous research (Hamdani, 2013) with a system of sub-surface flow constructed wetland to reduce the organic pollution load in wastewater. In addition, plant Typha angustifolia grows and develops around the site. The research was conducted with a residence time of 15 days. There are 4 reactors were observed and made in duplicate, with a variation of the number of plants, among other: 1 plant ,3 plants,5 plants, and without plant and the residence time variation among others: 3,6,9,12, and 15 days. Sampling was done with a variation interval of 3 days was based on the results of research conducted by Tangahu & Warmadewanthi (2001) and Ismaryanto (2012). System Vertical Subsurface Flow Constructed Wetlands by use of plant Thypa angustifolia could remove the concentration of TSS, TDS, and change the rate of ORP. Highest TSS removal efficiency in the reactor that contains 5 plants with a residence time of 15 days, amounting to 97.55% and for TDS occur in the reactor which contains 1 plant with a residence time of 6 days, by 77%. While the ORP value changes are not too significant, which is about 200 mV in the overall residence time

Kajian Penilaian Kualitas Air Sungai dalam Upaya Pengendalian Pencemaran Air Sungai (Studi Kasus: Kali Banger – Semarang Timur)

Banger River is one of macro-drainage system with a total length of 6,256 kilometers and 524,46 Ha. During this time Banger received numerous exiles waste from 10 villages which it passes in sub-district Semarang East. Along with the rising numbers of inhabitants it is possible to load any pollution will be higher. This research was conducted to find out the current water quality assessment and pollution control efforts in the days come. Water quality assessment of Banger River done using methods of NSF-IKA, the results show Segment 1, 3 getting category are blackened, and Segment 2,4 are filthy nasty. Settlement activity is providing input to the highest organic pollution load of Banger River. SWOT analysis showed the weakness of internal factors and the number of threats from external factors in Banger River so that it needs endure strategy for controlling pollution that occurred while continuous trying to

Pengaruh Jumlah Kendaraan Dan Faktor Meteorologis (Suhu, Kelembaban, Kecepatan Angin) Terhadap Peningkatan Konsentrasi Gas Pencemar No₂ (Nitrogen Dioksida) Pada Persimpangan Jalan Kota Semarang

Every day, the number of vehicles on the road is increasing. It will cause increasing of pollutant gases. According to Soedomo (2001) as an overview, transportation sector accounted for 69% of NO2 pollution in urban areas, followed by industry and households. According to Fardiaz (1992) NO2 concentrations in the air of a city varies throughout the day depending on sunlight and vehicles activity. NO2 concentrations are also influenced by meteorological factors, it's temperature, humidity, and wind speed. Karangrejo Raya street, Sukun Raya street, Ngesrep Timur V street of Semarang is located at the intersections in Banyumanik. Karangrejo street and Sukun Raya street are center of activity because it is a populated residential area, while Ngesrep Timur V street is a center of educational facilities because there are several universities are located in this region. The method used is sampling directly at the site when the rush hour of vehicles in the morning (7:00 to 08:00), noon (13:00 to 14:00), and afternoon (16:00 to 17:00) for 12 days each 3 days row at Karangrejo Raya street, Sukun Raya street, and Ngesrep Timur V street and the last 3 days compared every other street using impinger and anemometer. Based on the research that has been analyzed, the concentration of NO2 at Karangrejo Raya street ranged from 0.7 to 4.2 mg / Nm3, the concentration of NO2 at Sukun Raya street ranged from 1.0 to 4.1 mg / Nm3, while the concentration of NO2 on the Ngesrep Timur V ranged from 0.2 to 1.7 mg / Nm3. It shows that the concentration of NO2 in three sreets are far below the quality standard

Pengaruh Penambahan Nano- Zno dan Nano-al2o3 sebagai Agen Anti Bakteri dalam Pembuatan Membran Selulosa Asetat-kitosan terhadap Biofouling yang Disebabkan oleh Bakteri Gram Negatif

Biofouling akibat keberadaan bakteri dalam air menjadi salah satu kendala dalam teknologi membran terutama membran selulosa asetat. Walaupun kitosan telah ditambahkan namun belum optimal dalam mencegah fenomena ini. Sehingga dalam penelitian ini membran selulosa asetat-kitosan dibuat dengan blending nanopartikel ZnO dan Al2O3 variasi konsentrasi 0-4% untuk meningkatkan sifat antibakteri membran. Untuk mengetahui pengaruh penambahan kedua nanopartikel terhadap karakteristik membran dan membandingkan keefektifan antara keduanya maka dilakukan beberapa uji karakterisasi yang meliputi uji fluks, analisa gugus fungsi (FTIR), dan morfologi membran (SEM) serta uji antibakteri dengan metode zona hambat. Diperoleh nilai fluks membran modifikasi optimum pada konsentrasi nano-ZnO 2% senilai 169.37 (L.m-2.jam-1) dan nano-Al2O3 3% senilai 757.49(L.m-2.jam-1). Morfologi dan susunan gugus fungsi dalam matriks membran dapat dilihat dengan uji SEM dan FTIR. Bakteri yang digunakan sebagai uji sifat antibakteri membran adalah bakteri E.coli. Dari uji zona hambat terlihat penambahan nanopartikel belum menghasilkan sifat antibakteri yang optimal dimana zona Bening yang terbentuk tipis pada konsentrasi ZnO 1% dan Al2O3 1 %. Nanopartikel dalam konsentrasi tinggi memicu terjadinya aglomerasi yang menyebabkan berkurangnya sifat antibakteri