BIOPOLYMERS vs POLYACRYLAMIDE
BIOPOLYMERS USE IN COMPARISON WITH POLYACRYLAMIDE HAVE ADVANTAGE IN REDUCED COST AND REDUCED HEALTH RISKO TO WORKERS AND ENVIRONMENT. Approximately 120,000 tonnes of polyacrylamides are used in the EU each year . Of this amount about 60,000 tonnes are used in the water industry for water clarification, waterworks sludge treatment and sewage sludge thickening. The remaining 60,000 tonnes are used primarily in :
-mineral processing approximately 45.000 tonnes) (to aid the removal of fine particles from wash waters) and -- pulp and paper treatment (approximately 15.000 tonnes (to improve the efficiency of the separation of paper fibres from water dewatering.
The maximum concentration of residual acrylamide monomer in polyacrylamides is 0.1% (w/w), though for some applications (e.g. drinking water treatment) the maximum permitted amount of free acrylamide in the polymer is 0.025% (w/w).
The maximum amount of acrylamide available for release from polyacrylamides is taken to be the maximum concentration of residual acrylamide monomer in the polymer.
The residual content of acrylamide in the polymers is kept below 0.1% w/w to avoid classification as a Category 2 carcinogen under the Dangerous Preparations Directive (88/379/EEC and adaptations).
RISKS CHARACTERISATION
More Information about Risk Assessment you can find in : European Union Risk Assessment Report –Acrylamide Vol.24
THE USE OF BIOPOLYMERS REDUCE THE RISK TO THE HEALTH OF WORKERS UP TO 80%.
BIOPOLYMERS NANO COMPOSITE
SLUDGE DEWATERING WATER AND WASTEWATER TREATMENT USING BIOPOLYMERS
In order to reduce the operating costs of the sewage treatment plant, where the costs of sludge treatment account for half of the total costs and to reduce the impact of acrylamide in practice, it is necessary to search for new products and technologies. The ability to reduce the amount of synthetic polymers in the treatment of sludge and their complete replacement with nanocomposites and biopolymers has been proven by research projects and in practical application. In addition, there is a patent documentation for our first biopolymers based on cellulose (WO2003016226, DE10139829). The following microscopic images were taken during our research.
MINERAL PROCESING
Using our biopolymers significantly improves product quality. In addition, the environmental impacts of chemicals is also reduced.
PULP AND PAPER INDUSTRY
Eliminating impurities in the circulation water and wastewater of paper machines
In papermaking waste paper (up to 100%) is being used, which pollutes the water circuits and wastewater of the paper mill.
One possibility to reduce these problems is to use our bio-nanocomposites to react with the cationic and, anionic trash.
WWTP Salzburg
PLANT TRIAL TESTS
COST BENEFIT CALCULATION USING BIOPOLYMERS
Paper presented at the BiH FIRST CONGRESS ON WATER IN SARAJEVO 27,28.10.2016
NANO COMPOSITES AND BIOPOLYMERS IN SLUDGE TREATMENT
Dr. Edhem Salihović, dipl.ing. EWT Wassertechnologie, Ingenieurbüro für Maschinenbau, Umwelttechnik und Umweltbiotechnologie A-5020 Salzburg Richard Kürth Straße 4 , ewt@sbg.at
SUMMARY:
In the EU, the annual consumption of polymer for sludge dewatering at wastewater treatment plants is 60,000 t. Polymers are mostly based on acrylamide and are generally considered non-hazardous for the environment. Because of the potential toxicity of residual monomer in the product that is less than 0.1% he cannot get class zero in the safety sheet for water quality. In order to reduce operating costs of the WWTP in which the sludge disposal costs represent half of the total costs, as well as reducing the impact of acrylamide in practice, it is necessary to find new products and technologies for sludge treatment. The possibility of reducing the amount of synthetic polymers in the treatment of sludge and their complete replacement using nano-composite materials and biopolymers has been proven through research projects and in practical application. In addition there is a patent documentation for our first biopolymers based on cellulose (WO2003016226, DE10139829)
Paper presented at the SLOWENIEN SECOND CONGRESS ON WATER IN PODCETRTEK 19, 20.04.2017
ENERGY DEMAND REDUCTION IN SLUDGE DEWATERING USING BIO-NANO - COMPOSITE
Edhem Salihovic
EWT Wassertechnologie, Ingenieurbüro für Maschinenbau und Umweltbiotechnologie A-5020 Salzburg)
Abstract
This presentation investigates the energy required to dewater the activated sludge by centrifugation using bio nano-composites, as compared to commonly used polyacrylamide-based polymers and different conditioners used as skeleton builders or filtering aids. The ability to reduce the energy requirementsfor the treatment of sludge by using nano-composite materials and biopolymers has been proven through research projects and in practice. In addition, there is a patent documentation for our first biopolymers based on cellulose (WO2003016226, DE10139829)
Keywords: Biopolymers; Sludge dewatering; Nanocomposite; Energy