Activated sludge

Three identical Biosep® membrane bioreactors were operated at different sludge retention times of 8, 15 and 40 d in order to treat municipal wastewater. The design of this process is an aerated activated sludge reactor and a submerged microfiltration hollow-fibre membrane. The objective of this stud

Biosorption experiments were performed using different pretreated activated sludge as bioadsorbent for Cu2+, Cd and Ni2+. Pretreatment with NaOH was found to improve the adsorption capacity of the sludge where as treatment with HCl reduces it. The treated and untreated sludge show great affinity tow

The filtration performances of submerged membrane bioreactors (SMBR) with and without the addition of powdered activated carbon (PAC) were investigated respectively under the same feed and operation conditions. A series of experiments were conducted to analyze near-critical flux, effect of air-scour

The work aimed to determine the effectiveness of the treatment of wastewater generated by the meat industry in a hybrid system combining biological methods of activated sludge (in an SBR reactor) and reverse osmosis. The tests carried out on the wastewater from the meat processing plant Uni-Lang in

Nanofiltration (NF) membrane technology has made rapid progress and then extended its application fields. It has obtained in particular the good results in the removal of organic and inorganic matters or microbes in the water and wastewater. To investigate the applicability and characteristics of NF

Membrane separation is one potential technique to further unite industrial production and wastewater treatment. This is due to the low and constant level of solids in permeate thus facilitating specific water reuse. Membranes can be applied in primary, secondary and tertiary treatment. In this study

The filterability of activated sludge is an important factor for the economical operation of membrane bioreactors (MBR). In the literature mainly investigations on sludge dewaterability in respect to further disposal are published. In this study, a procedure for determining filterability in a crossf

N-vinyl-2-pyrroldinone was grafted by the UV-irradiation process onto the porous surface of poly(vinyl chloride) (PVC) membrane to increase the surface wettability and to decrease the adsorptive fouling. The graft yield of the modified PVC membrane was maximum at 5 min UV exposure time and 20 wt% aq

The increasing demands for wastewater treatment and the establishment of new processes and systems necessitate applied research. Especially in the field of membrane technology new areas for wastewater treatment can be opened for implementation. Membrane bioreactors usually find their application fie

The wastewater from the meat industry was treated in the system linking the processes of: coagulation, biological treatment using the activated sludge method, simultaneous precipitation of phosphor and reverse osmosis. The carried out investigation studies showed that after the simultaneous precipit