ORIGINAL RESEARCH
Deep Denitrification of the Simulated Coastal
Secondary Effluent with High Chloride Ion
by Electrolysis
| 1 | College of Civil and Architectural Engineering, North China University of Science and Technology,
Tangshan 063000, PR China |
CORRESPONDING AUTHOR
Submission date: 2020-04-24
Final revision date: 2020-08-31
Acceptance date: 2020-09-06
Online publication date: 2021-01-29
Publication date: 2021-03-08
Pol. J. Environ. Stud. 2021;30(3):2437–2443
KEYWORDS
TOPICS
Water treatmentReuse of reclaimed watersUtilization and managementBiological and chemical treatmentReuse of wastewatersPollutionWater monitoringWaste purificationCoagulation processesWastewater engineering
ABSTRACT
In this study, we proposed electrolysis method to remove TN of the simulated coastal secondary
effluent with high chloride ion concentration. TN, nitrate-N, ammonia-N nitrite-N were detected to
evaluate the evolution of nitrogen. Under the set conditions, Nitrate-N, ammonia-N removal rate and
nitrite-N concentration increased with the rising FRC concentration. The higher the initial nitrate-N, the
lower the ammonia-N removal rate and the higher nitrite-N accumulation. The nitrate-N concentration
was almost not influenced by ammonia-N, and nitrite-N accumulation was greatly influenced by the
ammonia-N and nitrate-N. TN removal rate got up to from 87.6% to 50.0% without the influence of
COD. COD could greatly influence the removal of ammonia-N but little for the removal of nitrate-N and
nitrite-N accumulation. The TN removal rates reached from 68.0% to 57.2% with the influence of COD.
All the TN index met the discharge standard no higher than 15 mg/L. The conversion between nitrate-N
and ammonia-N did happen and intermediate product nitrite-N could be produced by nitrate-N and
ammonia-N. The application of the electrolysis method on the removal of TN in effluent improved the
understanding the TN removal mechanism and proposed a promising and reliable method for practical
engineering.
RELATED ARTICLE
We process personal data collected when visiting the website. The function of obtaining information about users and their behavior is carried out by voluntarily entered information in forms and saving cookies in end devices. Data, including cookies, are used to provide services, improve the user experience and to analyze the traffic in accordance with the Privacy policy. Data are also collected and processed by Google Analytics tool (more).
You can change cookies settings in your browser. Restricted use of cookies in the browser configuration may affect some functionalities of the website.
You can change cookies settings in your browser. Restricted use of cookies in the browser configuration may affect some functionalities of the website.