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Literature revealed that increase dosage of coagulant case the decrease in confederations of suspended solids and hence effects to increase its percent removal [28-29].
The six venoms studied induced lethal, hemorrhagic, defibrinogenating and in vitro coagulant activities, as previously described (Segura et al., 2010).
(1) The solution of polymer P, crosslinking agent A, and coagulant B were mixed in accordance with the ratio of the experimental schemes and stirred evenly.
Thus, the control of optimal coagulant rate consists of a challenge for the operators and engineers, especially when weather conditions contribute to the changes of parameters such as turbidity, temperature, pH and others.
Because Moringa seed extracts consist of large amounts of polar amino acids with positive and negative charges, the rupture caused by the effect of salt allows the existence in the molecule with a larger number of radical groups, which in turn promotes the formation of chemical bridges and the adsorption between the coagulant and colloidal substances, allowing brine solutions to be more effective in the coagulation process.
Comparison of the effects of coagulation and sedimentation in the treatment of aerated water and water after oxidisation with potassium manganate (VII) showed that the application of KMnO4 as an oxidising agent was much better than oxidisation with regards to the degree of the reduction in colour, turbidity and concentration of manganese and organic substances (except coagulant PIX-112), but unfortunately worse with respect to iron removal (Figs 3 and 4).
These Textile industrial effluents subjected to different coagulation process (for various coagulants in terms of process conditions, including coagulant dose, pH and settling time), advanced oxidation process (Ozonation process, and Fenton processes alone and in combination to treat the effluent) and to determine the effects of process conditions such as Ozone (O3) dose, initial dye contents, iron catalyst concentration, H2O2 concentration, pH treatment time and settling time on the overall efficiency of these processes.
The results showed that by increasing the dose of Coagulant consumption, the removal will increase too.
In a study, evaluated performance of coagulation process to remove low levels of turbidity and color from water using various coagulants. This research at an experimental scale and by using Jar test apparatus suggested that poly aluminum chloride with a concentration of 5mg/Lis the best coagulant to remove turbidity (%99%99.8) and color (%100).
Efficiency of process with no coagulant in primary settler and with addition of alum or natural coagulant from common bean seed will be evaluated.
The chemical properties and the physical properties for alum and ferric chloride coagulants used for the coagulation process are tabulated in Table 2 and the physical properties of the polyacrylamide coagulant aid used in the flocculation process is also tabulated in Table 2.