The original paper examined the potential of natural zeolite for colour and TOC reduction when packed in a fixed-bed system, considering various parameters such as wastewater characteristics, properties of natural zeolite, loading rate and hydraulic retention time. The results showed that when increasing the load from 22 to 37 mg/m3d (dyes) and from 84 to 154 mg/m3d(organic), colour removal efficiency decreased from 57 to 20% (RB5), from 80 to 46% (RB19) and from 72 to 55% (RR22), and TOC removal efficiency from 75 to 31%. And, when increasing the hydraulic retention time from 11 up to 17 h, the decolouration increased from 20 to 57% (RB5), from 46 to 80% (RB19) and from 16 to 57% (RR22), and TOC removal efficiency from 30 to 75%.
COBISS.SI-ID: 15483670
The aim of presented study was to select and investigate various commercially available textiles concerning their adsorption and filtration potential for salt reduction during wastewater treatment. The obtained results indicated better degree of adsorption and filtration of both nonwoven textiles compared with both woven fabrics, depending on type and concentration of salt. Generally, it could be concluded that the fabric construction had a superior impact on adsorption/filtration ability ahead of the salt type, although the poorest results (during both, adsorption and filtration experiments) were achieved using sodium sulfate.
COBISS.SI-ID: 15080470
The study includes small-scale column experiments conducted in continuous flow operation in order to asses the efficiency of two woven (PA and PES) and two non-woven (PP and bicomponent PP/PE) textiles as biofilm attachment filters to remove colour, salt and organic pollutants from two synthetically prepared (acidic or alkaline) dye-rich textile wastewaters. It was found that both nonwoven compact textiles (either made from PP or bicomponent PP/PE) with complex structures and high total void area were more suitable for this kind of application in comparison to the treatment efficiency of column packed with sand/woven fabrics. The obtained results indicate that layered compact textiles used in this study had significant effects on water quality parameters, and showed explicit buffering capacity, but on the other hand, the salt content was negligible reduced.
COBISS.SI-ID: 15134742