scholarly journals SAFETY INCREASE OF BITUMEN PRODUCTION BY IMPROVEMENT OF THE GAS-LIQUID REACTOR CONSTRUCTION

Author(s):  
N.Kh. Abdrakhmanov ◽  
Z.A. Zakirova ◽  
G.R. Aminova ◽  
G.A. Sharipov
Keyword(s):  
2017 ◽  
Vol 18 ◽  
pp. 01021
Author(s):  
Dorota Kopyto ◽  
Wit Baranek ◽  
Zbigniew Myczkowski ◽  
Katarzyna Leszczyńska-Sejda ◽  
Michał Drzazga ◽  
...  

Etching of copper with acidic CuCl2 solution is a widely used chemical method in printed circuits production. During the process, the solution is enriched in Cu(I) ions, resulting in reduction and then loss of etching bath capacity. In order to ensure the required etching kinetics, the solution is regenerated by oxidation of Cu(I) to Cu(II). The industrially applied Cu(I) oxidants are, e.g.: Cl2, chlorates. Their application is expensive and associated with drawbacks related to health, safety and environmental hazards (e.g. Cl2 emission). In the result of long-standing cooperation between the IMN and MATUSEWICZ Budowa Maszyn, an innovative, original and environmentally friendly method of acidic solutions regeneration used during printed circuits etching was developed. A new-type reactor equipped with oxidation monitoring-control systems using oxygen or oxygen-enriched air was applied. The reactor construction enables to run the process with oxygen circulation in the reactor, ensures full oxygen utilisation in the regeneration process, achievement of the required performance and process rate, and eliminates expensive, hazardous and often toxic reagents. This is an innovative method, and since there are no analogous technologies currently known and used in Europe and worldwide, the presented method is technologically, economically and ecologically unrivalled.


2011 ◽  
Vol 2011 (1) ◽  
pp. 253-268
Author(s):  
James Gusek ◽  
Joel Kelsey ◽  
Ryan Schipper ◽  
Brad Shipley

Atomic Energy ◽  
1962 ◽  
Vol 10 (6) ◽  
pp. 601-612 ◽  
Author(s):  
Ya. B. Fridman ◽  
N. D. Sobolev ◽  
S. V. Borisov ◽  
V. I. Egorov ◽  
V. P. Konoplenko ◽  
...  

2020 ◽  
Vol 21 (2) ◽  
pp. 244-253
Author(s):  
Adzani Ghani Ilmannafian ◽  
Ema Lestari ◽  
Fitria Khairunisa

ABSTRACTPalm oil mill effluent (POME) is a side product from oil palm processing activities with potential environmental pollution. Its smells, colored appearance contains high COD, BOD, and TSS values. Thus, the processing of POME is crucial. In treating this wastewater, filtration and phytoremediation methods can be applied. This study aimed to evaluate the performance of the POME treatment using filtration and phytoremediation methods using water hyacinth (Eichhornia crassipes). This research method includes a sampling process, tub reactor construction with four filter ingredients (sand, gravel, coconut fiber, and sponge), the dilution of POME (concentration of 100%, 75%, and 50%), phytoremediation, filtering and testing of sample parameters. The parameters tested were BOD, COD, TSS, pH, and physical properties, including color, smell, and turbidity. The results of this study showed that the application of POME treatment with water hyacinth was not yet effective, supported by the following research results of the treatment concentration of 100%, 75%, and 50% with BOD levels respectively 894.7 mg/l, 304.15 mg/l, and 77.03 mg/l, COD levels respectively 4,320 mg/l, 1,120 mg/l, and 440 mg/l, TSS levels were 400 mg/l, 200 mg/l and 0 mg/l respectively. While, pH results for those treatments are 8,8 and 9 respectively.Keywords: filtration, liquid waste, phytoremediation, water hyacinthABSTRAKKegiatan operasional Pabrik Kelapa Sawit menghasilkan produk samping (By-Product) salah satunya limbah cair yang berbau, berwarna, mengandung nilai COD, BOD serta TSS yang tinggi berpotensi mencemari lingkungan, sehingga pengolahan limbah cair di pabrik kelapa sawit sangat penting. Filtrasi dan fitoremediasi adalah metode yang dapat digunakan dalam mengolah limbah cair pabrik kelapa sawit. Penelitian ini bertujuan untuk menganalisis hasil pengolahan limbah cair pabrik kelapa sawit dengan metode filtrasi dan fitoremediasi menggunakan tanaman eceng gondok (Eichhornia crassipes). Metode penelitian ini meliputi proses sampling, membuat bak reaktor berukuran 60 cm x 40 cm x 40 cm dengan 4 media penyaring (pasir, kerikil, serabut kelapa dan spons), kemudian melakukan pengenceran limbah cair pabrik kelapa sawit dengan konsentrasi 100%, 75% dan 50%, fitoremediasi, penyaringan dan pengujian sampel parameter BOD, COD, TSS, pH dan Uji sifat fisik meliputi warna, aroma dan kekeruhan. Hasil penelitian ini menyatakan bahwa aplikasi pengolahan limbah PKS dengan tanaman enceng gondok belum efektif, dengan ditunjang hasil penelitian sebagai berikut : 100%, 75%, dan 50% dengan kadar BOD berturut-turut 894,7 mg/l, 304,15 mg/l, dan 77,03 mg/l, kadar COD berturut-turut 4.320 mg/l, 1.120 mg/l dan 440 mg/l, kadar TSS berturut-turut 400 mg/l, 200 mg/l dan 0 mg/l dan pH berturut-turut 8,8 dan 9.Kata kunci: eceng gondok, filtrasi, fitoremediasi, limbah cair 


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