Challenge Technology Industries

Chemical & Pharmaceuticals - Pharmaceuticals
Respirometry Solutions for Pharmaceutical Wastewater

A pharmaceutical company was interested in knowing whether a specific component, MCB, inhibited the biodegradation of other wastewater constituents. A series of respirometer tests was set up using identical mixtures of wastewater and return activated sludge (RAS) plus varying amounts of MCB. The OUR fingerprint of this wastewater includes a first peak of about 500 mg/L-hr within the first hour of contact that represents the oxidation of highly-biodegradable organic constituents. A second group of readily...
Chemical Water Treatment
Respirometry Solutions for Chemical Production Wastewater

OUR measurements were made for two waste streams from a chemical production plant. The fingerprint for Waste 1 indicated the presence of three major groups of organic constituents. The first group of readily biodegradable organic constituents is oxidized at maximum kinetic rate through about one hour of contact. Oxidation of a second group of constituents causes the OUR to increase through about 3.5 hours of incubation. This increase in OUR is caused by growth of microorganisms during the oxidation reaction....
Bioenergy
Respirometry Solutions for Anaerobic Biomass Activity Tests

The methane production activity of anaerobic sludges is related to the history of the sludge, the biomass yield from the wastewater the sludge has been treating, the fraction of methanogens, and the presence of toxic substances.
Waste and Recycling - Composting
Respirometry solutions for composting sector

Respirometry solutions for composting sector.
Respirometry Solutions for Testing the Stability of Compost

METHOD: A full-scale compost plant was faced with the need to determine the stability of the compost in the active bays during the compost operation. Samples were collected at 24-ft intervals (2 days of operation) through the length of one bay of the in-vessel compost system and placed into sealed glass reactors. Air was recirculated through the compost material using a peristaltic pump. A caustic scrubber was placed in the recirculation line to remove carbon dioxide (Figure 1). The reaction vessels were...
Soil and Groundwater - Site Remediation
Respirometry solutions for the bioremediation industry

Respirometry solutions for the bioremediation industry.
Monitoring and Testing - Waste Monitoring and Testing
Respirometry Solutions for Monitoring Treatment Plant Performance

Waste Type: Activated sludge process effluent.
Manufacturing, Other
AER-200 Respirometer System for Anaerobic Applications

The CHALLENGE AER-200 Respirometer System consists of one or more biological reaction vessels, gas flow measuring cells, and a computer. The gas measuring base contains eight flow ceHs and associated interconnecting circuitry. As gas flows through each cell under the influence of a slight pressure caused by gas production in the reaction vessel, bubbles of a fixed volume are formed in the lower section of the cell. These bubbles in turn pass through a detection section where a counter is activated. Finally,...
Soil and Groundwater
Respirometry solutions for the soil industry

Respirometry solutions for the soil industry.
Air and Climate
Respirometry Solutions for Modeling of Methane and Hydrogen Production

Waste Type: Synthetic (Ethanol). Objective: To model the methane produced from acetate and from hydrogen in cultures receiving ethanol as an input substrate. The objective was to verify the accuracy of models developed on the basis of substrate conversion.
Monitoring and Testing
Respirometry Solutions for Culture Activity Tests

Waste Type:Synthetic (Acetic Acid). Objective: To monitor the gas produced by steady-state cultures receiving acetate as the input substrate. Another objective was to verify the consistency of gas production over a period of time as a means of verifying culture stability and test repeatability.
Respirometry Solutions for Toxicity Testing

Waste Type: Complex alcohols. Objective: Certain constituents of the test waste were know to be biodegradable but were suspected of being toxic to aerobic biological processes when present in high concentrations. The objective was then to determine how much waste could be added to an activated sludge process before toxic impacts would be experienced.
Respirometry Solutions for Monitoring the Activity of Mixed-Liquor Solids

Sample Type: Mixed liquor solids from an activated sludge process MVLSS = 1320 mg/L.
Water and Wastewater
Respirometry solutions for the wastewater industry

Respirometry solutions for the wastewater industry.
Waste and Recycling
Respirometry Solutions for Industrial Waste Treatability

Test Setup: 40 and 60 mL of wastewater were added to individual respirometer flasks each containing nutrient/mineral/buffer medium to form two different dilutions. TCMP was added to inhibit nitrification. 25 mL of seed from a laboratory scale reactor was added to each test reactor. Oxygen uptake was monitored using a CHALLENGE AER-200 respirometer for five days. A second dose of 40 and 60 mL of leachate sample was then added to each reactor and oxygen uptake was measured for another 5 days.
Pulp & Paper
Respirometry Solutions for Pulp Mill Wastewater

A pulp mill was interested in evaluating the impact of increasing organic loading rates on the performance of their activated sludge systems.

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Challenge Technology Industries

Chemical & Pharmaceuticals - Pharmaceuticals

Respirometry Solutions for Pharmaceutical Wastewater

Chemical Water Treatment

Respirometry Solutions for Chemical Production Wastewater

Bioenergy

Respirometry Solutions for Anaerobic Biomass Activity Tests

Waste and Recycling - Composting

Respirometry solutions for composting sector

Respirometry Solutions for Testing the Stability of Compost

Soil and Groundwater - Site Remediation

Respirometry solutions for the bioremediation industry

Monitoring and Testing - Waste Monitoring and Testing

Respirometry Solutions for Monitoring Treatment Plant Performance

Manufacturing, Other

AER-200 Respirometer System for Anaerobic Applications

Soil and Groundwater

Respirometry solutions for the soil industry

Air and Climate

Respirometry Solutions for Modeling of Methane and Hydrogen Production

Monitoring and Testing

Respirometry Solutions for Culture Activity Tests

Respirometry Solutions for Toxicity Testing

Respirometry Solutions for Monitoring the Activity of Mixed-Liquor Solids

Water and Wastewater

Respirometry solutions for the wastewater industry

Waste and Recycling

Respirometry Solutions for Industrial Waste Treatability

Pulp & Paper

Respirometry Solutions for Pulp Mill Wastewater

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