Various operating parameters, such as current density, initial pH, wastewater recirculation flow rate and continuous flow regime, were examined for intensifying the performance of the process.
From the statistical analysis, the most important parameter which is efficient in dyestuff removal can be obtained to be initial concentration of wastewater, which is followed by initial concentration initial pH of wastewater.
From the results it was found that, the linear effect of agitation speed and initial textile dye wastewater concentration were more significant than other factors for the textile dye wastewater treatment.
Open image in new window Fig. 8 Initial CEC versus wastewater treated CEC (meq/100 g) (a, b and c respectively).
It is also concluded that characteristics of wastewater, initial pH and temperature conditions affected the fermentative biohydrogen production.
To evaluate the effect of pH, settling time, the initial turbidity of wastewater, the amount of coagulant, and the concentration of dye (Melanoidin) were chosen to study their effects on removal of wastewater color and turbidity.
SRB based bioprocesses are more attractive compared with chemical process owing to their low cost, very high removal and recovery of metals even at low initial concentration from wastewater.
The ash caused few problems for the initial screening of wastewater (manual screening through static bars, followed by pumping up to a decanter for primary sedimentation. No DDS were created for waste water in the Jenkins et al. (2014) study, as the complexity of waste water systems and their interaction with hazard characteristics is not easily quantified.
The initial pH of the wastewater was varied between 2 and 10 by using either 0.1 N HCl or 1 M NaOH.
The evaluated operating parameters were: initial pH of the wastewater that was in the range of 2.0 to 6.5 and the treatment time that was varied from 30 to 180 min.
