Laboratory Testing Methods for Centrifugal Sludge Dewatering Processes
Kätkä, Kaisa (2013)
Kätkä, Kaisa
Tampereen ammattikorkeakoulu
2013
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2013060212355
https://urn.fi/URN:NBN:fi:amk-2013060212355
Tiivistelmä
Sludge dewatering is an important part of the municipal and industrial wastewater treatment. The purpose of sludge dewatering is to reduce organic ingredients, as well as the volume and weight of the sludge. Sludge treatment removes odour, improves hygiene by removing pathogenic organisms and prepares sludge for further utilisation or disposal. Although different instrumentation and process steps vary from one wastewater treatment plant to another, the sludge dewatering part of the process remains one of the most costly parts of the process, and the most challenging in terms of the chemistry involved. It is also the most highly regulated area of the industry. During the last decade, centrifugal sludge dewatering has largely replaced a great number of other instrumentation set-ups such as belt filter presses or drying beds in the municipal wastewater treatment plants. Due to the high shear force environment, demanding performance requirements are created for the dewateringaid chemicals used in centrifugal sludge dewatering.
The heart of the dewatering process lies in the detailed chemical composition of the sludge dewatering chemicals. The sludge dewatering chemicals are typically different compositions of charged acrylamide-co-polymers, with different structural elements such as charge, molecular weight and structuring. The application research and product development are highly dependent on accurate laboratory methods, finetuned to describe the process environment with the real application.
The heart of the dewatering process lies in the detailed chemical composition of the sludge dewatering chemicals. The sludge dewatering chemicals are typically different compositions of charged acrylamide-co-polymers, with different structural elements such as charge, molecular weight and structuring. The application research and product development are highly dependent on accurate laboratory methods, finetuned to describe the process environment with the real application.