Next Article in Journal
A Regional Application of Bayesian Modeling for Coastal Erosion and Sand Nourishment Management
Next Article in Special Issue
Feed Spacer Geometries and Permeability Coefficients. Effect on the Performance in BWRO Spriral-Wound Membrane Modules
Previous Article in Journal
Numerical Study of the Velocity Decay of Offset Jet in a Narrow and Deep Pool
Previous Article in Special Issue
Barium-Encapsulated Biodegradable Polycaprolactone for Sulfate Removal
Article Menu
Issue 1 (January) cover image

Export Article

Open AccessArticle
Water 2019, 11(1), 60; https://doi.org/10.3390/w11010060

Multilevel Adaptive Control of Alternating Aeration Cycles in Wastewater Treatment to Improve Nitrogen and Phosphorous Removal and to Obtain Energy Saving

Department of Electrical Engineering, Electronics & Automation, University of Extremadura, Avda. Elvas s/n, 06006 Badajoz, Spain
*
Author to whom correspondence should be addressed.
Received: 6 November 2018 / Revised: 20 December 2018 / Accepted: 26 December 2018 / Published: 31 December 2018
(This article belongs to the Special Issue Advances in Water and Wastewater Monitoring and Treatment Technology)
  |  
PDF [1444 KB, uploaded 3 January 2019]
  |  

Abstract

This work presents an adaptive control of the process of alternating aeration/non-aeration cycles for wastewater treatment. It is aimed at improving nitrogen and phosphorous removal efficiency and reducing energy consumption. It comprises two control levels. The first decides when to switch on and off aeration by comparing the Dissolved Oxygen (DO) and the Oxidation Reduction Potential (ORP) with two activation thresholds. The second, a supervisory control, continuously adapt their values by analyzing the working conditions of the reactor (organic matter and ammonium loads). These working conditions are described by four parameters obtained from the DO and ORP curves: Oxygen Uptake Rate (OUR), Oxygen Rise Average Slope (ORAS), ORParrow and Nitrate and Oxygen Uptake Rate (NOUR). It also adjusts the aeration system power to adapt it to those conditions. This adaptive control has been implemented in a laboratory scale prototype and its performance compared with that provided by another control with fixed thresholds and aeration power implemented in a similar prototype. The adaptive control clearly outperforms that without adaptation in nitrogen and phosphorous removal efficiency and requires lower energy consumption. Similar efficiencies were obtained for organic matter removal (higher than 90% in both cases). View Full-Text
Keywords: alternating cycles; organic matter management; nitrogen removal; enhanced biological phosphorous removal; energy saving alternating cycles; organic matter management; nitrogen removal; enhanced biological phosphorous removal; energy saving
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Martín de la Vega, P.T.; Jaramillo-Morán, M.A. Multilevel Adaptive Control of Alternating Aeration Cycles in Wastewater Treatment to Improve Nitrogen and Phosphorous Removal and to Obtain Energy Saving. Water 2019, 11, 60.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Water EISSN 2073-4441 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top