wastewater quality monitoring programme enhancement...wastewater quality monitoring programme...
TRANSCRIPT
Wastewater Quality
Monitoring Programme
Sampling, Analysis and
Session 2: Green Drop – Hints and Tips
Sampling, Analysis and Submission
Unathi Jack
Municipal Benchmarking Initiative
• WWQ Monitoring
�License/Permit conditions
�General Authorisation (GA)
o General limits
Introduction
o General limits
o Special limits
Monitoring Programmes:
• Operational
�Understand the effectiveness of the plant performance
Why do we need to monitor?
plant performance
• Compliance
�Receiving environment � river, sea, reused (for irrigation)
�Health – discharging/ irrigating
�Understand activities taking place at the receiving environment
Operational:
• Flows: inflow and outflow
�Inflow – how to adjust treatment processes.
- Understand at what capacity is the plant operating
Developing a Monitoring Programme
- Abstracting according to the applicable authorisation
�Outflow – ID if the quantity is according to applicable authorisation
�Detect if any significant water losses through out the process
�Assist in taking action if any significant losses identified
Ensure that both the inlet and
outlet flow meters are installed
Operational:
• Sample points
�Raw
�Each unit process
�Sludge (guidelines)
Developing a Monitoring Programme
Understand the sources of received
influent
�Sludge (guidelines)
�Industrial Effluent (by-laws)
�Irrigation effluent (if re-used for that)
• Determinants
�Specified in Authorisation
�WWQ received at different plants vary (contributors e.g. mines, industries, etc)
Operational
• Frequency
�Size of works
�Cost
Developing a Monitoring Programme
�Cost
�Sensitivity of receiving
environment
Compliance
• Sample points
�Outlet of the works
�Upstream (before the point of final effluent discharge
Developing a Monitoring Programme
effluent discharge
�Downstream(after the final effluent discharge point)
�Sea outfall
�Groundwater
�Soil monitoring – where contamination is possible
Developing a Monitoring Programme
Unlined/overflowing Ponds:
groundwater/soil monitoring to
be considered
Compliance
• How to collect samples –
communicate with your lab
�Sample bottles
Developing a Monitoring Programme
Learn about the sample
collection requirements
�Taking a sample (e.g. do not rinse the bottle)
�Amount/volume of sample required
�How to preserve a sample
�Time allowed between sample collection and analysis
requirements
Grab samples -preferable
Analysis
• Analysis
Equipment/Laboratory
�SANAS Accredited laboratory
Analysis of WW Quality
Request a certificate
from the lab,
including analysis
methods�Inter-lab procedures
o ISO Accredited methods
o SABS Approved methods
o DWA approved methods
o Z scores
�Distance to the lab
methods
Analysis
• Results reporting
�Compare results with applicable standards
�Make results available to DWA monthly
Analysis of WW Quality
Develop a structured monitored
programme
�Make results available to DWA monthly
�Adjust process operation
Have your results analysed at a reliable lab
�Apply for a license from DWA
�Have a General Authorization
�Have operations and maintenance manual
Key Points
�Have operations and maintenance manual
�Have on-site analysis equipment
� Understand who your contributors are
�Develop and implement a monitoring programme
�Report results and take actions