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Respirometer Product Applications In Hungary
17 applications found
METHOD: A seed culture from a full-scale anaerobic digester was placed in a number of 200 mL respirometer vessels. A synthetic wastewater having a 20,000 mg COD/L in a nutrient/ mineral/buffer solution was fed daily to each reaction vessel — along with various amounts of the cleaning agent The reactors were operated for a four day test period with measurement of gas production using a CHALLENGE ANR-200 anaerobic ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
Test Setup: A series of dilutions consisting of 50, 75, 100, 125, 150, and 175 mL of test wastewater were added to respective 500 mL respirometer flasks along with nutrients, minerals, and buffers. TCMP was added to eliminate interference from nitrification. Oxygen uptake was measured over a five-day test period using a CHALLENGE AER-200 ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
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. ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
The CHALLENGE AER-200 Respirometer System consists of one or more biological reaction vessels, gas flow measuring cells, and a computer. ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
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 ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
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. ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
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 ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
Measurement of oxygen uptake of the pesticides: carbaryl, carbofuran and aldicarb in samples seeded with microorganisms extracted from ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
Samples of the industrial wastewater were collected and oxygen uptake for four dilutions was measured using a CHALLENGE AER-200 aerobic/anaerobic respirometer system. Biodegradation kinetic coefficients were determined using the method described by Dang, et. al. ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
The reaction vessels were connected to a Challenge AER-200A respirometer system for measuring the oxygen ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
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 ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
A pulp mill was interested in evaluating the impact of increasing organic loading rates on the performance of their activated sludge ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
Sample Type: Mixed liquor solids from an activated sludge process MVLSS = 1320 ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
Waste Type: Activated sludge process ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
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. ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
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 ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
Measurement of oxygen uptake rates in activated sludge processes is essential to their satisfactory operation. Traditionally, oxygen uptake rates (OUR) have been determined by using a dissolved oxygen probe to measure the change in dissolved oxygen in a BOD bottle. While this method is rapid, it provides only a snapshot of the pattern of oxygen uptake in a treatment plant. Much more can be learned about the operation of a treatment plant by measuring the oxygen uptake rate over a period ranging from one to four ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)