Biodegradation Kinetics of Organic Matter in Water from Sludge Dewatering after Autothermal Thermophilic Aerobic Digestion

Paweł Biedka ()
Additional contact information
Paweł Biedka: Department of Water Supply and Sewage Systems, Bialystok University of Technology, Wiejska 45A Street, 15-351 Bialystok, Poland

Energies, 2022, vol. 16, issue 1, 1-14

Abstract: The study presents the research results on the rejected water generated in dewatering sludge stabilised in Autothermal Thermophilic Aerobic Digestion (ATAD) technology. The research was carried out in three municipal wastewater treatment plants (WWTPs), with a capacity of 1500 to 3260 m 3 d −1 and a sludge node capacity of 835 to 2000 kg DM d −1 . The mean content of Kjeldahl nitrogen (TKN) in the rejected water samples taken from each object ranged from 485 to 1573 mg N L −1 , ammonium nitrogen 318 to 736 mg N L −1 , and the average concentration of total phosphorus ranged from 96 to 281 mg P L −1 . The average content of organic matter expressed as five-day biological oxygen demand (BOD 5 ) ranged from 205 to 730 mg O 2 L −1 , while chemical oxygen demand (COD) ranged from 767 to 4884 mg O 2 L −1 . The study determined the kinetics of the biochemical decomposition of organic matter, assuming that it follows the first-order equation. The average reaction rate constant k in subsequent treatment plants was estimated at 0.424, 0.513 and 0.782 d −1 . The R 2 coefficient determining the model’s adjustment to empirical values was not lower than 0.952. The organic matter biodegradability index average values ranged from 0.17 to 0.26.

Keywords: rejected water; autothermal thermophilic aerobic digestion; ATAD; dewatering; biodegradation kinetics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/16/1/203/pdf (application/pdf)
https://www.mdpi.com/1996-1073/16/1/203/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:16:y:2022:i:1:p:203-:d:1014221

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().