The improvement of the biodegradability of diclofenac and sulfamethoxazole by combined cometabolism and gamma irradiation treatment

The two forms of most common biological purification used (activated sludge and biofilm) cannot effectively remove pharmaceuticals, such as diclofenac and sulfamethoxazole. However, a biological phenomenon called cometabolism can improve the removal efficiency. In the case of cometabolism, an easily...

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Bibliographic Details
Main Authors: Bezsenyi Anikó
Sági György
Makó Magdolna
Palkó György
Tóth Tünde
Wojnárovits László
Takács Erzsébet
Corporate Author: International Symposium on Analytical and Environmental Problems (25.) (2019) (Szeged)
Format: Book part
Published: 2019
Series:Proceedings of the International Symposium on Analytical and Environmental Problems
Kulcsszavak:Gyógyszerkémia
Online Access:http://acta.bibl.u-szeged.hu/64857
Description
Summary:The two forms of most common biological purification used (activated sludge and biofilm) cannot effectively remove pharmaceuticals, such as diclofenac and sulfamethoxazole. However, a biological phenomenon called cometabolism can improve the removal efficiency. In the case of cometabolism, an easily degradable substrate (growth substrate) is added to the wastewater to be treated, which supplies the microorganisms with sufficient energy for biodegradation. Such easily degradable molecules (e.g. methanol, acetic acid, ethylene glycol) are also formed in the anaerobic steps of wastewater treatment systems and are utilized as growth substrates. The rate of oxidative degradation of pharmaceuticals (measured by using oxygen uptake rate) was shown to greatly increase in the presence of easily degradable growth substrates in the case of activated sludge. In the biofilm system which is another form of biological wastewater treatment, the rate of cometabolism remained low, most possibly because it has much narrower bacterial diversity than activated sludge. However, the efficiency of oxidative degradation can be significantly improved by using an advanced oxidation process, ionizing radiation treatment, before cometabolism. This combined treatment, irradiation and cometabolism is recommended for the degradation of recalcitrant organic compounds.
Physical Description:284-288
ISBN:978-963-306-702-4