Lecture 2 Flashcards
What is the oldest and most widespread form of water pollution
Biodegradable organic pollution
What are some sources of organic pollution
Sewage
* Agricultural waste (slurry.)
* Food processing waste
* Waste from manufacturing of natural textiles and paper
* Oil refining
What are the two control of Municipal Pollution types
Urban Waste Water Treatment Directive
Water Services
What does the Urban Waste Water Treatment Directive do??
They define the standards for the treatment of waste water, the quality of
effluent
What does the Water Services do??
They set standards and provides for inspections of private waste water
treatment systems
What are some impacts of organic pollution?
Disrupts oxygen cycling
* Increases toxins
* Can introduce pathogens
* Can cause morbidity and mortality
How does organic pollution change the physical and chemical aquatic environment
Dissolved oxygen (DO) levels decrease
* Suspended solids and silt increase
* Toxic waste products of decomposition increase
What happens to organisms that cant tolerate the changed conditions?
They are reduced and disappear
What is the variety in water quality assessment techniques?
Physico-chemical and Biological
Decision over which to use based on the information gained and the cost-effectiveness
What do water quality assessments help us understand?
Helps us to understand the health of ecosystem and
biodiversity
What do the EU water framework directive aim to do?
Protect/enhance all waters
Achieve “good status” for all waters
Manage water bodies based on river basins or catchments
What are the three types of water monitoring?
Surveillance Monitoring
Operational Monitoring
Investigative Monitoring
What are some pros and cons of Physico-chemical methods
Pros :Precise, discriminatory and
quantitative
* Useful for identifying
pollutants
Cons: Costly method
Irregular discharges may
not be detected
What are Physico-chemical methods
Concentrations of pollutants, or constituents that indicate
presence of pollution are measured
What are Biological methods
They are organisms that vary in their sensitivity to pollution
