Wyniki wyszukiwania - BazTech

1

I co dalej z osadami?

Wójtowicz A.

Wodociągi - Kanalizacja

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2016

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nr 1

14--18

2

Zagospodarowanie komunalnych osadów ściekowych w Polsce

Pająk T.

Wodociągi - Kanalizacja

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2009

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nr 9

32-33

3

Zagospodarowanie komunalnych osadów ściekowych po 2013 roku

Gromiec M. J., Koć J.

Wodociągi - Kanalizacja

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2009

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nr 9

24-25

4

Odwadnianie komunalnych osadów ściekowych na laboratoryjnej wirówce sedymentacyjnej typu MPW-350 oraz na przemysłowej wirówce typu Noxon DC20 - problem przeniesienia skali

Kutryn J., Piecuch T.

Rocznik Ochrona Środowiska

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2009

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Tom 11

517-542

EN

The paper presents results of municipal from Jamno Wastewater Treatment Plant (JWTP) dewatering, through whirling in laboratory centrifuge MPW- 350 and industrial Noxon DC20 centrifuge, made in Sweden with operating efficiency 8-25 m3/h. The examinations has been conducted within parameters range: whirling time 1 to 10 min, rotation speed 1800÷2400 1/min, flocculent dose: 0, 28, 34 ml/dm3 (only laboratory centrifuge). Discussed issue was difference of water content value of sediment W% after whirling in laboratory centrifuge MPW-350 and in industrial Nixon centrifuge. The effect of whirling of the same sludge in laboratory centrifuge MPW-350 and industrial Noxon centrifuge, assuming the same whirling time, rotation speed, was better for industrial centrifuge. Better effect of municipal sewage sludge dewatering in industrial centrifuge was a result of centrifugal force value, main dewatering force, which determines the centrifugal sedimentation pressure.The realization of investigative evaluations for the industry related with mechanicaldewatering of sediments in the field of centrifugal forces is not enough for objective assessment of sediments whirling efficiency only on the basis of the opinion of tests in laboratory conditions, when the result of such evaluation is application (e.g. purchase and the use of industrial centrifuge). Utilisation of laboratory examinations on mechanical dewatering of sediments in the field of centrifugal forces can only be useful for the practice, when there are directives relating to so-called transfer of scale of investigations, or also prediction based on such investigations, which was introduced in the paper. If it is possible to conduct investigations in the industrial scale for given sediments in order to apply results (purchase and application), then they should be conducted for the correct assessment of dewatering efficiency. Investigations described in the paper show that the difference of water kontent in sediments after dewatering process in the industrial centrifuge, in comparison to dewatering process in laboratory centrifuge, is the result of the pressure inside the industrial centrifuge 5-6 times higher than pressure inside the laboratory centrifuge; this obviously also depends on the sequence of other parameters characterizing the process, which answers with those assumptions, quotient of pressure.

5

Agrochemical properties of soils fertilized with sewage sludge from sewage treatment plant at Olecko

Jasiewicz C., Antonkiewicz J., Mazur Z., Mazur T., Krajewski W.

Chemia i Inżynieria Ekologiczna

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2007

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Vol. 14, nr 5-6

457-463

EN

The research aimed at an assessment of effects of sewage sludge from Sewage Treatment Plant at Olecko used as a fertilizer on the agrochemical properties of soils. Soil samples collected from the fields fertilized with the sewage sludge revealed changes of many chemical soil properties, important from the perspective of soil fertility. The advantageous changes comprise improved soil abundance in organic carbon, total nitrogen and increase in available P, K and Mg contents in soil. The applied sewage sludge induced an increase in soil sorption capacity and in Ca and Mg share in soil sorption complex. Negative changes of soil chemical properties included mainly increase in soil hydrolytic acidity and slight increase in heavy metal contents.

PL

Celem badań była ocena skutków zastosowanego do celów nawozowych osadu ściekowego pochodzącego z Oczyszczalni Ścieków w Olecku. Próbki gleby pobrane z pól nawożonych osadem ściekowym wykazywały zmiany wielu właściwości chemicznych ważnych z punktu widzenia żyzności gleb. Do zmian korzystnych należy zaliczyć zwiększenie zawartości węgla organicznego, azotu ogólnego oraz zawartości przyswajalnych form P, K i Mg w glebie. Pod wpływem zastosowanego osadu ściekowego nastąpił wzrost pojemności sorpcyjnej oraz zwiększenie udziału Ca i Mg w kompleksie sorpcyjnym. Do niekorzystnych zmian właściwości chemicznych należy zaliczyć wzrost kwasowości hydrolitycznej oraz niewielki przyrost zawartości metali ciężkich w glebie.