Problems in Water Environmental Control—Sense and Nonsense in Measurement of Water Protection ()
Abstract
Water
environmental control and process refinement inside a wastewater treatment
plant (WWTP) is fundamentally based on sampling, analysis and on-line
measurements on water and sludge streams. The problems related to an accurate
and reliable control and thus an efficient water protection are addressed in
the following. Four different crucial points whenever a sampling and control
scheme is planned: 1) Where should a sampling and on-line measurement take place?
2) When should sampling take place? 3) How should the sampling and on-line
measurement take place? 4) Which variables should be controlled? Examples are
given from different plants demonstrating ways to address the questions.
Especially the relevance of the adopted parameter BOD (Biochemical Oxygen
Demand) is discussed. It is finally suggested to even abandon the use of BOD as
consent variable in favor of on-line measurement of Suspended Solids, Nitrogen
and Phosphorous.
Share and Cite:
Morling, S. (2014) Problems in Water Environmental Control—Sense and Nonsense in Measurement of Water Protection.
Journal of Water Resource and Protection,
6, 1381-1389. doi:
10.4236/jwarp.2014.615127.
Conflicts of Interest
The authors declare no conflicts of interest.
References
|
[1]
|
European Union (1991) Council Directive 91/271/EEC Concerning Urban Waste Water Treatment.
|
|
[2]
|
Alcontrol Analysis Protocols.
http://se.alcontrol.com/sv/
|
|
[3]
|
Olsson, U. (2005) Confidence Intervals for the Mean of a Log-Normal Distribution. Journal of Statistics Education, 13.
www.amstat.org/publications/jse/v13n1/olsson.html
|
|
[4]
|
Morling, S. (2001) Performance of an SBR-Plant for Advanced Nutrient Removal, Using Septic Sludge as a Carbon Source. Water, Science and Technology, 43, 131-138.
|
|
[5]
|
Morling, S. (2008) Nitrogen Removal Efficiency and Nitrification Rates at the Sequencing Batch Reactor in NowyTarg, Poland. VATTEN, 2.
|
|
[6]
|
Karlsson, I. (1996) Environmental and Energy Efficiency of Different Sewage Treatment Systems. Water, Science and Technology, 34, 203-211.
http://dx.doi.org/10.1016/0273-1223(96)00575-6
|
|
[7]
|
Helsinki Commission (2007) Background Information on Costs for the Revised Proposal from Sweden Concerning More Stringent Demands Regarding Discharges of Phosphorus from Waste Water Treatment Plants.
|
|
[8]
|
Umble, A.K. (2010) Nutrients and Technologies That Remove Them. Indiana Water Environment Association.
|