Identyfikatory
Warianty tytułu
Effect of polyelectrolytes on the gravity thickening of coagulation sludges
Języki publikacji
Abstrakty
The experiments involved two types of coagulation sludge non-conditioned and conditioned with cation and onion polyelectrolytes made by CIBA. The proneness of non-conditioned sludge to gravity thickening was found to increase with the initial water content and with the proportion of iron compounds in the dry matter. Polyelectrolyte-aided-conditioning produced agglomeration of solid particles, thus shortening the duration of the thickening process. Another major advantage was the reduction of turbidity, as well as the decrease of iron and aluminium concentrations, in the supernatant (though, there was a rise in COD). The positive effect of the conditioning process on the decrease of water content and sludge volume was found to be inversely proportional to the initial water content. That is why the presence of polyelectrolytes upgraded the thickening effect in sludges which were less prone to gravity thickening. Of the investigated conditioning agents, Zetag 87 (a cation polyelectrolyte) was the most effective.
Czasopismo
Rocznik
Tom
Strony
7--10
Opis fizyczny
rys., tab.
Twórcy
autor
autor
- Instytut Inżynierii Ochrony Środowiska, Politechnika Wrocławska, Wyb. Wyspiańskiego 27, 50-370 Wrocław
Bibliografia
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPOB-0001-0023
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