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1

Inproving of the quality food for animals by pulsed power plasma discharge

Gnapowski S., Gnapowski E., Duda A.

Advances in Science and Technology. Research Journal

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2015

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Vol. 9, nr 27

58--65

EN

Soy beans powder mixed with water is a good food for animals. However, there are two problems with this brew. One is that soy beans powder is sunk down to fast. Parts of soy beans powder are too big and too heavy. Animals do not eat soy beans powder because after a few minutes (around 3min) is sunk down and soy beans are on the bottom case. Another negative point is a quick growth of mold, especially during summer when the temperature is highest. Mold is making food unhealthy and causes unpleasant smell. After mold appears it is difficult to clean the case. One of the solutions to eliminate these problems is to use pulse power plasma discharge and the second solution is ultra sound treatment. It was observed that pulse power discharge can decrease the size of soy beans powder a few times. Another advantage of such experiments was that the pulse power discharge killed bacteria and viruses. After our experiments we did not observe mold growing. Using pulse power discharge we can decrease sinking speed by about ten times. Ultra sound generation is useful and can decrease sinking speed even more, compared with pulse power discharge.

2

Water treatment including surfactant using a pulsed discharge

Yamabe C., Nakazaki S., Ihara S.

Przegląd Elektrotechniczny

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2009

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R. 85, nr 5

105-108

EN

An industrial wasted water including surfactant such as the Nonylphenol ethoxylate (NPEO) was treated by a pulsed discharge. The effect of treatment was estimated by the COD measurements. The generation of active radicals such as atomic oxygen whose emission wavelength was 777 nm and OH radicals whose emission wavelength was 306.7 nm and 308.9 nm were confirmed at the different repetition rate of discharge (100 - 300 Hz) by the measurements of optical emission spectroscopy. The COD removal rate of about 19 % was obtained and the efficiency of wasted water treatment was 0.74 mg/kWh.

PL

Poddawano obróbce ścieki przemysłowe za pomocą wyładowania impulsowego z nonylofenonem (NFD). Skuteczność obróbki określono za pomocą współczynnika chemicznego zapotrzebowania tlenu(COD). Za pomoca optycznej spektrometrii emisyjnej zaobserwowano powstawanie aktywnych rodników, takich jak: tlen atomowy (długość fali 777 nm) oraz OH (o długościach fali emisji 308,9 i 306,7 mm), dla czestotliwosci wyładowania z zakresu od 100 do 300 Hz. Uzyskano ok. 19% obniżenie COD oraz sprawnośc energetyczną obróbki ścieków 0,74 mg/kWh

3

Laser diagnostics of NO molecules and OH radicals in DC positive streamer corona discharges

Kanazawa S.

Transactions of the Institute of Fluid-Flow Machinery

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2007

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nr 119

39-54

EN

The streamer observation and LIF detection of the NO molecules and OH radicals were performed during the steady-state positive DC corona discharge at atmospheric pressure. The time relationship between the regular streamer coronas, laser pulse, LIF signal and laser-induced streamer was explained for no time synchronization LIF measurement. Using the corona radical shower reactor, two-dimensional distributions of ground-state NO (X_2II) could be observed not only in the discharge zone but also both in the downstream and the upstream regions of the reactor. The presence of the ground-state OH (X_2II) and excited-state OH (A_2...) radicals in DC streamer discharge was also investigated. Moreover, the effect of electrohydrodynamic (EHD) flow on NO profiles in the reactor and ozone interference in OH LIF measurement were discussed. The obtained results sllOwed that the density of NO molecules decreased not only in the plasma region formed by the corona streamers and the downstream region of the reactor but also in the upstream region of the reactor. On the other hand, the ground-state OH radicals were generated and stayed mainly in the region where streamers propagated betweell the electrodes.