Respirometry Applications

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  • Category: Monitoring & Testing ×

  • Subcategory: Respirometry ×

Waste water respirometry solutions for toxicity reduction tests

by Strathkelvin Instruments Ltd.     based in Motherwell, UNITED KINGDOM

In industrial manufacturing companies, before a new process comes on-line, it is important to measure the toxicity of the effluent stream. This is especially the case for companies who treat their own waste. From the toxicity value (EC50) obtained, it may be a cost-effective solution to simply discharge the effluent to the treatment works at a slow and defined rate to minimise damage to the activated sludge. Following a period of acclimatisation it is often possible to increase feed rates to the plant and this can again be managed using the Strathtox Respirometer. An alternative approach is to undertake toxicity reduction procedures, such as neutralisation or acid hydrolysis, in pilot-scale laboratory studies. The Respiration or the Nitrification Inhibition Test may be used for this. In the future, toxicity reduction may be stipulated by local authority, water company or publicly-owned treatment works prior to giving discharge consents. Toxicity reduction may be evaluated using toxicity tests on activated sludge provided by the treatment works.

Respirometer Applications

by ECHO d.o.o.     based in Slovenske Konjice, SLOVENIA

Measurement of the aerobic biodegradability of plastic materials (US Standard ASTM D5338, European Standard ISO 14855)

Anaerobic Digester for Biogas Plant

by Center Enamel Co,.Ltd     based in Guangzhou, CHINA

Glass fused to steel tank is made by a special process, called vitreous enamel coating ,which is an advanced technology for anti-corrosion purpose of steel plate. Tanks are coated both inside and outside with enamel .Today, glass fused to steel tank is widely used in wastewater treatment projects as aerobic and anaerobic reactors of UASB,EGSB,SBR,BAF,USR,CSTR, and equalization tank, clarifier, and sludge holding tank. It has proven its superior resistance to thermal and chemical when facing water with extremes in pH and temperature.

Waste water respirometry solutions for toxicity testing

by Strathkelvin Instruments Ltd.     based in Motherwell, UNITED KINGDOM

If industrial wastewater entering a treatment works contains toxic components the rate of biodegradation will be inhibited or stop completely. This can result in failed consents and will certainly give rise to operational problems. Visible indications include deflocculation, bulking and the appearance of filamentous bacteria. Sometimes, there are no visible effects. When the sludge bacteria are inhibited, there is the possibility of toxicity carryover in the effluent that is discharged to receiving waters. With new environmental legislation being introduced, worldwide, to protect the natural environment, toxin discharge is now a serious concern for treatment plant managers.

Waste water respirometry solutions for toxicity tracking

by Strathkelvin Instruments Ltd.     based in Motherwell, UNITED KINGDOM

If toxicity is identified in a mixed sewage entering a treatment works, the problem for the plant manager is to track and identify the source of the toxicity. This can be done by sampling the effluent stream at various points in its length. By working in a logical sequence back up the sewer network the number of samples can be minimised. This type of testing should be rigorously enforced for new product introduction by a waste producer, as well as sampling the effluents directly at source. The samples would be tested against the activated sludge of the receiving works, using the Respiration Inhibition Test or the Nitrification Inhibition Test.

XRF analysis for lead paint

by Niton UK Limited     based in Woodmancott, Winchester, UNITED KINGDOM

Niton analysers facilitate direct surface testing for lead paint, testing for lead in dust wipes from surfaces, testing the lead content of soil in the surrounding area (containment) and the testing of lead content in filters from respirators or volume air samplers for worker/public protection.

Waste water respirometry solutions for monitoring activated sludge health - sour test

by Strathkelvin Instruments Ltd.     based in Motherwell, UNITED KINGDOM

Respiration rate monitoring of Antwerp treatment works showed periods when the activated sludge was up to 40% inhibited, with resultant sludge washout episodes. Using the Health monitoring test, a pattern of ‘normal’ respiration rates for a plant can be determined. Lower respiration rates will alert the treatment works to a chronic toxicity problem, allowing corrective actions to be taken. Toxicity monitoring can now be carried out on a routine daily basis, at all treatment works receiving potentially toxic wastewaters. This is especially important if there has been a history of poor plant performance.

Oxygen Monitoring from Aerobic and Anaerobic for Toxicity Assessments

by Respirometer Systems and Applications, LLC     based in Springdale, ARKANSAS (USA)

Toxicity of pure chemicals is assessed using respirometers by adding increasing concentrations to an active culture. The concentration at which oxygen uptake or gas production begins to decrease is known as the “threshold toxicant concentration.”

Oxygen Monitoring from Aerobic and Anaerobic for Biomass Activity Tests

by Respirometer Systems and Applications, LLC     based in Springdale, ARKANSAS (USA)

Pulse-Flow respirometers can be used to assess biomass activity for aerobic and anaerobic reactions. In aerobic tests, cultures are combined with nutrients, trace minerals, and an organic substrate – such as acetic acid or ethanol. The maximum oxygen uptake rate reflects the amount of active biomass in the test culture.

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