Waste water respirometry solutions for toxicity testing
Toxicity, therefore, results in:
- Increased costs of treatment
- Failure to comply with discharge consents
- Financial penalties for discharging toxic effluent
In order to protect a treatment works, from unknown toxic influents entering by sewer, a toxicity management regime is required. Tests with a laboratory respirometer are then required to measure the toxicity of the effluent, in order to determine the safe rate of discharge into the aeration tanks. For tankered waste, laboratory tests on samples of the wastewater are carried out prior to its acceptance for treatment. Manufacturing companies who treat their own waste and are concerned to minimise treatment costs, use the respirometer to monitor the toxicity of effluent streams. In this way, discharge rates can be controlled in order to ensure that toxicity does not inhibit the activated sludge bacteria of the aeration tanks.