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Influence of the type of membrane-forming polymer on the membrane fouling

Świerczyńska A., Bohdziewicz J., Kamińska G., Wojciechowski K.

Environment Protection Engineering

2016

Vol. 42, nr 2

197--210

The effect of the membrane-forming polymer (PES, PAN and PVDF) on the fouling phenomenon has been investigated occurring on the surface of the ultrafiltration membranes used for the polishing of industrial wastewater pre-treated by biological methods. The activated sludge method in SBR reactor was used to treat dairy wastewater mixed with 10 vol. % of landfill leachate. The susceptibility assessment of polymeric membranes to the fouling phenomenon was carried out using the plate-and-frame membrane module SEPA CF-NP produced by GE Osmonics. The following properties of the mem-brane were determined: the dependence of the volumetric flux of the permeate on the process duration, the transport properties of deionized water, the relative permeability of the membrane for the flux of deionized water and for the wastewater flux, as well as the contact angle of the membranes. It can be concluded that the kind of membrane-forming polymer had an influence on the fouling phenomenon occurring on the ultrafiltration membranes used for the polishing of industrial wastewater treated in a SBR reactor.

Determination of the most effective operating conditions of membrane bioreactor used to industrial wastewater treatment

Świerczyńska A., Bohdziewicz J.

Environment Protection Engineering

2015

Vol. 41, nr 1

41--51

The effectiveness of co-treatment of leachates from an old site of municipal landfill with a dairy industry wastewater in a membrane bioreactor has been investigated. The subjects of the study were leachates collected at the municipal landfill in Tychy and dairy wastewaters from Dairy Plant in Bieruń. The determination of the most effective technological parameters of the process, i.e. activated sludge load and its concentration and types of COD fractions in the reactor influent was made. It was shown that the activated sludge load at the level of 0.06 g COD/(gDM·d) was the highest permissible one among all the investigated loads and the process run effectively within the whole investigated range of concentrations of activated sludge in a bioreactor. It was found that in the treated wastewater, the fraction of easily degradable organic compounds was the dominant one.

Pilot study on chemical industrial wastewater in tertiary treatment with biofilm for washing belts

Liu J.-M., Xu Y., Zhu Z.-R., Qiao S.-Y.

Environment Protection Engineering

2011

Vol. 37, nr 1

93-104

The biochemical characteristics of chemical secondary effluent of the wastewater treatment plant of Jilin Chemical Industry Corporation have higher residual concentration of CODcr and NH3-N, and lower residual concentration of BOD5 and alkalinity. These biochemical characteristics of chemical secondary effluent in tertiary treatment were studied with a pilot system of biological contact aerators (BCAs) to meet national discharged limits and requirements for washing belts, particularly to meet national limits of ammonia and benzene substances, etc. in the air of a workshop. The highest removal efficiency was obtained in the BCAs system and a scientific basis of reference was provided for reforming the system of pulse flocculated clarifier which can constitute a new approach in tertiary wastewater treatment for washing belts.