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Projects / Programmes source: ARIS

Treatment of waste waters from laundries in membrane bioreactor

Research activity

Code Science Field Subfield
2.14.02  Engineering sciences and technologies  Textile and leather  Textile chemistry 

Code Science Field
T470  Technological sciences  Textiles technology 
Keywords
Textile care, new washing processes, washing wastewaters, membrane bioreactor, membrane filtrations, wastewater treatment
Evaluation (rules)
source: COBISS
Researchers (8)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  29581  PhD Brigita Altenbaher  Engineering sciences and technologies  Junior researcher  2008 - 2011  63 
2.  26417  MSc Suzana Arnuš  Textile and leather  Researcher  2008 - 2011  133 
3.  24909  PhD Rebeka Fijan  Textile and leather  Junior researcher  2008  44 
4.  05537  PhD Branko Neral  Textile and leather  Researcher  2008 - 2011  325 
5.  06111  PhD Milenko Roš  Chemical engineering  Researcher  2008 - 2009  793 
6.  06095  PhD Sonja Šostar - Turk  Textile and leather  Head  2008 - 2011  843 
7.  18438  Darko Štanc    Technical associate  2008 - 2011  77 
8.  08248  PhD Janez Vrtovšek  Process engineering  Researcher  2010 - 2011  254 
Organisations (2)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0104  National Institute of Chemistry  Ljubljana  5051592000  20,958 
2.  0795  University ob Maribor, Faculty of mechanical engineering  Maribor  5089638010  23,905 
Abstract
With the valid legislation and due to high cost owing to environmental taxes for water pollution, industrial laundries are forced to reduce the quantity of wastewater. In Slovenia 200 laundries are registered, which pollute the environment with wastewater coming from washing of textiles. In so far research on wastewater from laundries a high degree of pollution (high COD, BOD, and AOX values) has been determined; therefore different cleaning methods are required before disposal into the sewage. However all these methods for cleaning wastewater are costly so it is essential to foremost reduce the wastewater pollution with the usage of environmentally friendly washing and disinfecting agents, to optimize the washing procedures and thereafter apply a wastewater cleaning method with membrane processes and membrane bioreactor. Firstly an optimization will be performed on the laundering procedures in two industrial laundries in Slovenia, to introduce a new environmentally friendly chemo-thermal process for washing hospital textiles. The chemo-thermal dezinfecting laundering process will be simulated in a laboratory washing machine using new ecological friendly washing and dezinfecting agents at lower temperature 70°C to test the dezinfection efficiency using standard bioindicators for the determination of antimicrobal effect. The environmental effect of the wastewater will be assessed by determining the parameters of pollution according to the Slovenian regulation. In the following of the research a system will be developed for treatment and recycling of wastewater, which is the aim of this research. On the basis of analyses of wastewaters in laundries, a concept will be developed on the usage of ultrafiltration (UF), and membrane bioreactor (MBR), which will be followed by nanofiltration (NF) and/or reverse osmosis (RO). Preliminary research, that will be directed with biological and physico-chemical measurements, will be performed on a laboratory MBR pilot plant and will be transfered to an industrial MBR pilot plant in an industrial landry.
Significance for science
With chemo-thermal washing procedure in industrial laundries we are: - introducted washing procedure at a low-temperature (70 °C), - reached the ecological effects of waste water treatment according to the Slovenian Official Gazette, No. 41/07, - reached the economical effects with saving system of washing procedure at low-temperature in comparison with thermal washing procedure, - reached the sufficiently cleaned and disinfected textiles that means that introduced washing procedure provides appropriate quality and textile hygiene. With research work of activity and application possibility treatment in membrane bioreactor with submerged membrane we are established that: - in the membrane bioreactor projecting are importante: construction and keeping the membrane, waste water input, characteristic of waste water, aeration of membrane and acive sludge, loading rate of acive sludge, release from system and biological activity and nature of biomass, where are elements interdependent, - loading rate provides a concetration of biomass and impacts on biological characteristic like biology activity and microbiological composition of sludge and physical properties like viscosity and oxygen transfering, - composition of waste water input contributes to operation of membrane bioreactor and tendency to membrane blocking, - cleaned waste water contains a very little suspended substances and result is low chemical oxygen demand (COD), - cleaned waste water contains no microorganism, - because of long loading rate is biological degradation of substance better.
Significance for the country
With chemo-thermal washing procedure and treatment of waste waters from laundries in membrane bioreactor we are: - contributed to the knowledge in the field of low-temperature laundering and importance of waste water treatment in the form of scientific articles and contributions at local and international conferences where were findings presented to the broad public, - the results were applied in two industrial laundries and thus increased the competitiveness of small and medium industrial laundries.
Most important scientific results Annual report 2008, 2009, final report, complete report on dLib.si
Most important socioeconomically and culturally relevant results Annual report 2008, 2009, final report, complete report on dLib.si
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