CES | Challenge OLR Respirometer

Uses full-strength mixed liquor. The OLR-300 system uses mixed liquor from an operating treatment plant to assess the oxygen uptake characteristics when operating under a variety of input conditions.

Four modes of operation. The OLR-300 system can be operated in FOUR modes: 1) mixed liquor only with continuous feed to the reaction vessel to determine instantaneous OUR for control purposes, 2) mixed liquor continuously plus wastewater feed continuously in a wide range of loading rates or food-to-microorganism ratios, 3) batch mode with mixed liquor only to provide batch OUR for diagnostic purposes, and 4) batch mode with mixture of wastewater and mixed liquor for diagnosing biodegradation characteristics of the wastewater.

Instantaneous response. The high rate of turnover of the mixed liquor during OUR monitoring tests provides rapid response to changes in influent conditions.

Larger reactor volume. The standard reaction vessel has a 1.5 L working volume.

Operation with enriched oxygen is possible. The headspace within the reaction vessel can be operated at almost any oxygen content from air (21%) to 95% to simulate treatment systems using high-purity oxygen processes.

pH monitoring can be provided. (Optional feature)

ORP monitoring can be provided. (Optional feature)

Compatible operating temperature. The operating temperature of the reaction vessel is the same as that in the source mixed liquor basin.

User-set OUR levels for alarms. User-set oxygen uptake rates can be used to flag high or low OUR conditions in an aeration basin.

Suited for assessing the presence of toxic conditions. The OUR-300 system is ideally suited for assessing biodegradation characteristics, including toxicity, of candidate wastewater streams.