PENENTUAN DOSIS OPTIMUM KOAGULAN UNTUK MENGOLAH AIR KALI KEBON AGUNG MENJADI AIR BERSIH

Using clean water in UPN “Veteran” Jatim is supplied from PDAM Surabaya and only used for household, sprinkling garden, and now never be utilized as material of drinking water or cooking. So that not close possibility bloated water invoice. Alternative of choose is processing water from Kebon Agung Canal which stream in front of campus. Problem arising out is that water from Kebon Agung canal is discarding from region of PT SIER to seaward, so that not yet fulfilled standards of clean water quality and required processing. Result of processing water from Kebon Agung Canal by using clean water treatment laboratory installation, can be obtained that parameter examinees come near standards parameter of clean water PERMENKES No. 907 year 2002 (Colour:17 TCU, TDS : 114 ppm, turbidity : 0,9 NTU

PENURUNAN TSS DAN WARNA LIMBAH INDUSTRI BATIK SECARA ELEKTRO KOAGULASI

Electrocoagulation is a process of destabilization of suspensions, emulsions and solutions containing contaminants by flowing direct current electric to form clots that are easily separated. This research to determine the efficiency decrease level of Chemical Oxygen Demand (COD), Total Suspended Solids (TSS0 and the coloring substance. Electrocoagulation process with various current strength is 0,5, 1, 1,5, 2, 2,5 Ampere and contact time is 20, 60, 100, 140 and 180 minutes. Electrocoagulation process with six by aluminium as electrodes. Laboratory result showed COD separation with highest percentage reached 83.33% at 180 minutes with current strength 2,5 Ampere, TSS separation efficiency 90% and coloring substance 88.51% at 180 minutes with current strength 2,5 Ampere. Keywords : Electrocoagulation, wastewater, Coloring subtanc

Kinerja Pengelolaan Sampah Perkotaan di Kota Kecamatan Gresik

Garbage is a problem that needs more attention. Increasing population density and limited land to accommodate leftover consumption are one of the factors causing the volume of waste to continue to mount. This study aims to determine the performance of urban waste management in the city of Gresik sub-district. The analysis technique used in this study is a qualitative and quantitative descriptive analysis technique. The technique used to select respondents is Stratified Random Sampling technique. The data used uses primary and secondary data. The results showed that there was 281.61 m3 of waste per day, with 5.1 m3 per day coming from the non-residential sector and 21 villages/kelurahan in Gresik District. The value of the performance level of waste management in Gresik District is 56% of the average yield for each waste management variable, so that the performance level of waste management in Gresik District is quite good. Performance results are influenced by technical, institutional, financing, community and private aspects as well as laws and regulations. Factors affecting the performance of waste management include transportation operations that are not optimal as a whole, the number of personnel and infrastructure is still limited, the community does not fully support waste management and there is still a lack of enforcement against violations of waste regulations.Sampah merupakan permasalahan yang perlu mendapatkan perhatian lebih. Meningkatnya angka kepadatan penduduk serta keterbatasan lahan untuk menampung sisa konsumsi menjadi salah satu faktor penyebab volume sampah yang terus menggunung. Penelitian ini bertujuan untuk mengetahui kinerja pengelolaan sampah perkotaan di kota kecamatan gresik. Teknik analisis yang digunakan dalam penelitian ini adalah teknik analisis deskriptif kualitatif dan kuantitatif. Teknik yang digunakan untuk memilih responden adalah teknik Stratified Random Sampling. Data yang digunakan menggunakan data primer dan sekunder. Hasil penelitian menunjukkan terdapat sampah sebanyak 281,61 m3 per hari, dengan 5,1 m3 per hari berasal dari sektor non pemukiman dan 21 Desa/Kelurahan di Kecamatan Gresik. Nilai tingkat kinerja pengelolaan sampah di Kecamatan Gresik adalah 56% dari hasil rata-rata setiap variabel pengelolaan sampah, sehingga tingkat kinerja pengelolaan sampah di Kecamatan Gresik adalah cukup baik. Hasil kinerja dipengaruhi oleh aspek teknis, kelembagaan, pembiayaan, masyarakat dan swasta serta hokum dan regulasi. Faktor-faktor yang mempengaruhi kinerja pengelolaan sampah antara lain operasional pengangkutan yang belum optimal secara keseluruhan, jumlah personil dan sarana prasarana masih terbatas, masyarakat belum sepenuhnya mendukung pengelolaan sampah dan masih kurangnya penindakan terhadap pelanggaran peraturan tentang persampahan

PENGOLAHAN AIR LIMBAH INDUSTRI TAHU DENGAN MENGGUNAKAN TEKNOLOGI PLASMA

Waste water tofu industrial are one of kind industrial throwing result of liquid waste treatment and solid either directly and also indirect to water, where in tofu process production a lot of need water for process of production. Industrial waste resulted from production process are solid and liquid, but liquid waste tofu industrial has level of bigger pollution compared with level of solid waste. So required waste water treatment, one of them is using by plasma technology. Plasma is made with voltage exploiting, that is by confronting two electrodes. By giving concurrent voltage that is enough is height, that is < 10 kv. Plasma technology in waste liquor is ion hops, this hop forms active species ( OH, O, H, H2O2) what measures up to radical where easy to react with organic compound without aside. Waste treatment melted industry to know by using plasma technology process is done with a few various resident time between 10 minutes to 160 minutes and cross-area between 18 cm2 to 90 cm2. Best result obtained from this research, when remaining 160 minutes and cross-area 90 cm2 yielding exclusion of COD 7529 % and TSS 7727 %. With konstanta which is highest that is 0000003 for exclusion of COD and with konstanta which is highest that is 0000009 for exclusion TSS

PEMANFAATAN BIJI ASAM JAWA ( TAMARINDUS INDICA ) SEBAGAI KOAGULAN ALTERNATIF DALAM PROSES PENGOLAHAN AIR SUNGAI

Tamarind seeds (Tamarindus indica) as waste are rarely used until now and needed to be developed further for river water which is more economical and biodegradable. The use of tamarind seeds as natural coagulant in river water treatment been done. Study on the effect of tamarind as a natural coagulant on water quality parameters which include: pH, turbidity and total suspended solid in river water by using the coagulation - flocculation method. The research variables are tamarind seed measure ( 500, 1000, 1500, 2000 and 2500 mg/l), particle diameter of tamarind seeds ( 20, 40, 60, 80 and 100 mesh). Result of the research explained that in the range of time the observation was done, the tamarind seed measure as an optimal coagulant being 1000 mg/l with particle diameter of tamarind seeds 100 mesh could removed 74,07% TSS and 51,79% turbidity. Keywords: Tamarind seeds, coagulation, flocculatio

PENGEMBANGAN PERSAMAAN POROSIT AS DAN ERGUN PADA UNGGUN FLUIDISASI TIGA FASA

Behavior of liquid-solid fluidized beds has been studied based on hydrodynamic characteristics. The hydrodynamic aspects include pressure drop, fluidization condition, porosity and height of expanded bed with various liquid velocity and particle size of quartz sands or glass bead Empirical correlation to predict the bed porosity for various superficial velocities developed based on particle resistant model .. Experiment conducted in a glass column with diameter of 9 cm and height of 150 em. The result showed that the relation of pressure drop, fluidization condition and expanded bed porosity with superjicial liquid velocity depend on particle size and shape. Based on dimensional analysis the relation between bed porosity and superficial liquid velocity could be correlate

OPTIMASI KINERJA COUNTERCURRENT PACKED COLUMN TOWER DALAM MENYISIHKAN POLUTAN UDARA

One of the big enough problems in contamination of air is gas emission result of combustion of fossil fuel. This research focussed at equipments of tower column packed countercurrent, a system equipments of cleaner of air with usage of water as absorbent. Usage of tower column packed countercurrent in period of selected time can degrade water pH of absorban used. using parameter changes of pH and measurement of removal efficiency, hence will know by most optimal appliance efectivity of system performance for the absorbed of yielded gas emission from combustion. Base from research result are got that sprayer with height (H) 15 cm at countercurrent tower column packed reactor have acquirement of efficiency of removal SO2 larger ones if compared to height 25 cm and 45 cm that is equal to 96,78% at static media and 97,62% at moving media, comparison of performance of system variation of countercurrent tower column packed seen from influence of situation height of sprayer to acquirement of efficiency removal most effective SO2 is at height of sprayer 15 cm good at static media and moving media while system of single tray with moving media condition have performance of removal SO2 Keywords : Countercurrent packed column tower, SO the highestness and effective equal to 97,62%. 2 removal

PEMANFAATAN FLY ASH BATUBARA SEBAGAI ADSORBEN DALAM PENYISIHAN COD DARI LIMBAH CAIR DOMESTIK RUMAH SUSUN WONOREJO SURABAYA

Tujuan penelitian ini adalah mengetahui pemanfaatan fly ash batubara sebagai adsorben untuk menyisihkan senyawa organik, mengetahui efisiensi penyisihan senyawa organik dengan menggunakan fly ash sebagai adsorben. Variabel yang digunakan dalam penelitian ini adalah massa abu batubara dengan kisaran 1 sampai dengan 5 gram, waktu agitasi pada kisaran 30 – 150 menit. Sedangkan ketetapan yang digunakan adalah kecepatan putaran paddle pada tangki berpengaduk 150 Rpm. Hasil terbaik yang diperoleh dari penelitian ini yaitu pada massa adsorben 5 gram dan waktu pengadukan 150 menit menghasilkan penyisihan COD sebesar 91,11 % dengan penurunan kadar awal 540 mg/l menjadi 48 mg/l, nilai ini sudah memenuhi syarat baku mutu sesuai Kep Men LH N0.112 Tahun 2003 yaitu 100 mg/l. Kata kunci: abu batubara (fly ash), adsorbsi, CO

PENINGKATAN EFFEKTIFITAS AERASI DENGAN MENGGUNAKAN MICRO BUBBLE GENERATOR (MBG)

Aeration process is a process to increase the solubility of oxygen in the water to removal organic materials contained in wastewater. Aeration process has several types, one of them is tray aerator. The aim of the research to increase the dissolved oxygen in the water with the use of Micro Bubble Generator (MBG) as the aeration process. The effectiveness of MBG will be examinated by analysis of DO that showing of dissolved oxygen in the water. The research activities carried out by using water as a water sample, rectangular contactor, the water supply from the water pump with a suction head of 9 meters, discharge head of 24 meters and a total head of 33 meters with a 220 volt / 50Hz / 1HP and 2850 RPM. The Supply air injection using a compressor which has a volume of 7 liters and 220 volts / 0,75HP / 2850 RPM. Several variations of the detention time is used 0,5,20,35 and 50 minutes. Flow rate was used 0.00018, 0.00014, 0.00013 and 0.00007 m3 / s, and the pressure was used 13 Psi, Psi 8, 6 and 3 Psi. Then Dissolved Oxygen was measured to determine the effectiveness of the MBG in aeration process. The result of research was that the smallest pressure with the smallest flow rate and at 35 minutes, a very significant increase in dissolved oxygen. While at the same flow rate and pressure and the detention time of 50 minutes, the increasing of dissolved oxygen in water was no significant. This condition was caused aeration process on saturated conditions. It concluded that the flowrate 0.00007 m3 / s and pressure 3 Psi formed micro bubbles regime. was used 0.00018, 0.00014, 0.00013 and 0.00007 m3 / s, and the pressure was used 13 Psi, Psi 8, 6 and 3 Psi. Then Dissolved Oxygen was measured to determine the effectiveness of the MBG in aeration process. The result of research was that the smallest pressure with the smallest flow rate and at 35 minutes, a very significant increase in dissolved oxygen. While at the same flow rate and pressure and the detention time of 50 minutes, the increasing of dissolved oxygen in water was no significant. This condition was caused aeration process on saturated conditions. It concluded that the flowrate 0.00007 m3 / s and pressure 3 Psi formed micro bubbles regime

PENURUNAN GAS CO PADA SEPEDA MOTOR 4 LANGKAH (TAK) DENGAN MENGGUNAKAN GIPSUM

The air contamination which is caused are generated by human activity it self, one of them is transportation appliance. Motor cycle is one kind of the transportation appliance which is often met. One of type air pollutant which is produced by motor cycle is CO gas. CO gas can cause decreasing the ability of the body in receiving oxygen so that can cause O2 rate become decreasing, because CO gas fasten hemoglobin so that the hemoglobin fasten O2 decrease. Explanation in the long time will cause bronchitis, emphysema, and lung cancer. The strive to handle CO gas can be done by adsorption using the gypsum. Gypsum represent evaporate mineral that having the porosity and have very smooth surface, so that the absorption happen in many place. The variable which is learned in this research is the gypsum length ( 5, 10, 15, 20 and 25 cm ), detention time ( 30, 60, 90, 120, and 150 minute ) and the sum up hole ( 10 and 20 pieces ). The result which is obtained from this research, are gypsum length 25 cm, with the time on it 150 minute and the sum up the hole 20 pieces that producing CO gas exclusion equal to 30,32 %