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    Wyświetlanie 1-2 z 2
    Tytuł:
    Porównanie skuteczności koagulacji wodorotlenkiem wapnia oraz PIX-111 ścieków poprodukcyjnych z przetwórstwa ryb zakładu SUPERFISH w różnych warunkach temperaturowych
    Comparison coagulation effectiveness with application of calcium hydroxide and PIX-111 in different temperature conditions on postproduction wastewater from fish processing in SUPERFISH plant
    Autorzy:
    Piekarski, J.
    Hauzer, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1826091.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    ścieki poprodukcyjne
    przetwórstwo ryb
    koagulacja
    oczyszczanie ścieków
    Opis:
    Technological hall where installation for wastewater from fish processing SUPERFISH plant treatment is located is not insulated. Therefore coagulation process during the whole year is carried out in various temperature conditions. This paper presents results of the research on efficiency of coagulation process with application of calcium hydroxide PIX-111 in various temperature conditions. Samples of wastewater ware taken after flotation node form pretreatment installation in SUPERFISH fish processing plant. Then wastewater underwent coagulation process with application of calcium hydroxide (dose 2 g/dm3), as a first variant, and PIX- 111 reagent (dose 0.35 g/dm3 as used in SUPERFISH pretreatment installation), as a second variant. Coagulation process was carried out in three temperatures: T1 = 3.5°C, T2 = 11°C and T3 = 21°C. After coagulation and sedimentation following parameters were determined: pH [-],biochemical oxygen demand BOD [mg O2/dm3], chemical oxygen demand COD [mg O2/dm3], total organic carbon TOC [mg/dm3], total suspension Z [mg/dm3], dissolved substances SR [mg/dm3] and conductivity S [mS/cm]. On the basis of gained research results it may be stated, that PIX-111 showed decidedly smaller variations of determined parameters values, than calcium hydroxide, which is a result of dissolubility of both reagents. Especially bigger dissolubility of calcium hydroxide in lower temperatures. Clear qualitative difference of wastewater after process of coagulation with calcium hydroxide and PIX-111 reagent in low temperatures (3.5°C) was affirmed. Most of wastewater pollution parameters reached smaller values in low temperatures (which prevails during autumn, winter and spring) in process of coagulation with calcium hydroxide, than with PIX-111 reagent, which, most probably, is connected with the inappropriate range of pH of this coagulant application. That is why in order to obtain values of pollution parameters within the range of standards in treated wastewater from SUPERFISH plant in dependence on temperature of coagulation process, PIX-111 reagent should be given up or apply in lower temperatures calcium hydroxide . Also in order to increase effectiveness of PIX-111 it is necessary to correct pH before coagulation with e.g. calcium hydroxide. In higher temperatures of coagulation process (21°C - average temperature in summer) with calcium hydroxide and PIX-111 reagent values of considered pollution parameters in wastewater are similar.
    Źródło:
    Rocznik Ochrona Środowiska; 2007, Tom 9; 211-223
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oczyszczanie ścieków przemysłowych z produkcji gazobetonu
    Treatment of industrial wastewater from production of gas concrete
    Autorzy:
    Piekarski, J.
    Piecuch, T.
    Dąbrowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1825959.pdf
    Data publikacji:
    2008
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    beton komórkowy
    ścieki przemysłowe
    ścieki poprodukcyjne
    oczyszczanie ścieków przemysłowych
    technologie oczyszczania ścieków
    Opis:
    Celem pracy przedstawionej w ninniejszej publikaacji jest opracowwanie technologii oczyszczania poprodukcyjnych ścieków do jakości wody technologicznej , którą będzie można zawrócić do procesu produkcyjnego
    Autoclaved gas concrete is counted to group of light concretes, which volumetric density does not exceed 2 000 kg/m3. There are several methods of production of the typical gas concrete applied in Poland. Components are only domestic mineral materials: binder - cement with the lime or lime itself, aggregate - sand or the mixture of sand with ash or ash from coal burning in power stations; fluffing agent: crumbled aluminum. Reaction of aluminum with calcium hydroxide, coming into being as the result of lime hydration or hydrolysis of cement, causes emission of hydrogen fluffs the mass passing through it and makes possible creation of pores. The air replaces hydrogen in fluffed mass. At present post-production wastewater from PREFABET in Reda is treated in the system, which is presented in the Figure 1. The aim of investigations, presented in this paper, was to work out technology of post-production wastewater treatment to the quality of technological water which can be turned back to production process [7]. Results of investigations of basic contamination parameters of raw wastewater from PREFABET Company in Reda coming from autoclaves are presented in Table 1. There are many methods of industrial wastewater treatment [1,3, 4,5]. Wastewater coming from PRFABET Company were treated under laboratory conditions according to the technology proposed by Authors shown in Figure 2. Overflow from the process of gravitational sedimentation currently piped off to sewage system or to the sludge drying bet located on the terrain of the company does not meet the standards. Furthermore sediments after process of gravitational sedimentation on filter sand makes up currently secondary waste, stored on a heap. Also demand for gas concrete increasing lately on the construction market causes the necessity to increase production, and at the same time causes creation of larger quantities of post-production wastewater. Technology of post-production wastewater treatment proposed by Authors solves presented problems. Post-production wastewater treated according to proposed technology is characterized by 100% reduction of contamination parameters: absorbance, turbidity, biochemical oxygen demand, total organic carbon and ether extract. 99% of reduction was noted for chemical oxygen demand, 63% for total suspension, and 41% for dissolved substances and dry residues. So treated wastewater may again be used in the process of gas concrete production, while dewatered sediments may be utilized in the process of solidification as the addition to the production of plates and cobble stones
    Źródło:
    Rocznik Ochrona Środowiska; 2008, Tom 10; 259-273
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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