Wyniki wyszukiwania - BazTech

1

A novelhybrid bio-system for wastewater treatment using Algerian agricultural wastes

Chikhi S., Bouzid B., Hamitouche A. E.

Ecological Chemistry and Engineering. S

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2018

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Vol. 25, nr 2

255--266

EN

The development of a new clean, easy to handle process with similar efficiency to that of the conventional process is one of the most important challenges in green chemistry investigation. In this study, a new hybrid process was investigated; coupling coagulation-flocculation with adsorption using abundant and natural bioproducts (Chitosan and Ammi visnaga). The Chitosan/Ammi visnaga (coagulation/adsorption) system was studied for its Brilliant Green dye removal capacity. This new technique seems to be a good alternative method for wastewater treatment, showing satisfactory results with high rates of elimination that range around 90 %.

2

Wastewater purification from colorant by flotation and bio-coagulation

Lunov V., Sabliy L., Jaromin K., Łagód G.

Proceedings of ECOpole

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2012

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Vol. 6, No. 1

135--141

EN

The aim of this work is to study the effect of wastewater treatment by flotation and biocoagulation from toxic compounds (colorants), depending on the concentration and parameters of activated sludge in the treated water as well as the duration of flotation and colorant concentration. During the researches, size of sludge layer during flotation process was observed, together with effect of purification changing in time. The samples of activated sludge from purification plant of linen factory wastewater were used in our experiment. Samples were taken at the outflow from secondary sedimentation tank. At the laboratory, the sludge was used to prepare the model solutions of process factor of various concentrations. The obtained results showed time varying effect of purification with different concentration of activated sludge and a constant concentration of colorant as well as with the different concentration of colorant and a constant concentration of activated sludge.

PL

Przedstawiono efekty usuwania barwnika ze ścieków za pomocą procesów biokoagulacji i flotacji. Przeanalizowano wpływ stężenia osadu czynnego wykorzystywanego jako czynnik procesowy oraz czasu biokoagulacji i flotacji na uzyskiwany efekt końcowy. Podczas eksperymentu badano grubość powstającej warstwy osadów oraz zmniejszanie się stężenia barwnika w oczyszczanej objętości ścieków. Do badań wykorzystano osad czynny pobrany z wylotu osadnika wtórnego oczyszczalni ścieków przemysłu włókienniczego. Wspomniany osad wykorzystano do sporządzenia roztworów z czynnikiem procesowym o różnych stężeniach. Uzyskane wyniki pierwszej serii badań pokazują zmieniające się w czasie stężenia barwnika dla różnych stężeń osadu czynnego przy jednakowym stężeniu zanieczyszczeń na początku eksperymentu. Wyniki drugiej serii przedstawiają wpływ oczyszczania w wybranych etapach eksperymentu przy stałym stężeniu czynnika procesowego i zmieniającym się stężeniu barwnika na początku eksperymentu.

3

Wpływ procesów biochemicznych i substancji humusowych na stężenie związków wapnia i magnezu w wodach

Kolanek A., Kowalski T.

Ochrona Środowiska

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2002

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nr 1

9-12

EN

The results of laboratory tests showed that biochemical oxidation, as well as concomitant biocoagulation phenomena, brought about a change of the calcium and magnesium concentration in the water. This led to the establishment of a new calcium-magnesium equilibrium in the humic substances, which were present in the water. As a result, calcium concentration in the investigated water samples underwent some variations (but not substantial changes). The said processes exerted an indirect effect on the concentration of magnesium. When following addition of a sewage portion the value of the Ca/Mg molar ratio fell below that of the Ca-Mg equilibrium in the humic substances, the concentration of magnesium decreased in the course of biochemical degradation. When the Ca/Mg ratio value exceeded the Ca-Mg equilibrium value, magnesium concentration increased. The decrement or increment of magnesium was BOD5-dependent and averaged 0.045 val/gO2. Statistical analysis of the relationship between calcium and magnesium concentration variations for 8 rivers and 24 cross-sections substantiated the results of laboratory tests. Over 92% of instances showed a positive annual [Mg] = f([Ca]/[Mg]) relation with a coefficient of determination greater than 0.6. A positive annual [Ca] = f([Ca]/[Mg]) relation was detected in 6% of instances.

4

Wpływ procesów biochemicznych na stężenia związków wapnia i magnezu w wodach

Kolanek A., Kowalski T.

Ochrona Środowiska

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2001

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nr 1

17-21

EN

Biochemical oxidation and concomitant biocoagulation phenomena were found to produce loss of calcium and magnesium cations in treated water, thus contributing to the stabilization Ca-Mg equilibrium in the double layer of the humus complex. As a result, calcium concentration in the investigated water varied only negligibly. The effect of biochemical processes on magnesium concentration was an indirect one. If after sewage addition the Ca/Mg molar ratio value stabilized below the Ca-Mg equilibrium in the humus complex, magnesium concentration decreased in the course of the biochemical degradation process. If the said ratio value was greater than the equilibrium value, magnesium concentration increased.