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Xprt Product Applications In Hong Kong
92 applications found
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)
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)
Respirometry solutions for the biofuels ...
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)
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 connected ...
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. 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 ...
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)
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)
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)
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)
Geobag, also known as a titan tube or geotextile tube, is a large, tube-shaped bag made of porous, weather-resistant geotextile and filled with a sand slurry, to form an artificial coastal structure such as a breakwaters, dune or levee. Geotextile tubes ...
ByEcoGeoX Limited based in Qingdao City, CHINA
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)
Method: An industry was discharging wastewater to a municipal sewer and was suspected of causing problems with treatment at the plant. 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. (Res. J. of Water Poll. Control Fed., p. 1711, 1989). Results of the oxygen uptake measurements and kinetic analyses are ...
ByChallenge Technology based in Springdale, ARKANSAS (USA)
Respirometry solutions for the bioremediation ...
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)
Stay ahead of odour emissions. Proactive odour management solutions for industrial operations, sewer networks and municipalities. ...
ByEnvirosuite Ltd. based in Melbourne, AUSTRALIA
Our skills will support you in a wide range of sectors. With each one their challenges and rules/standards. Solution tailor-made for water treatment ...
ByEIA-Solution based in Lyon, FRANCE
Our borehole logging tools have strong magnetic field gradient and thus capable to perform diffusion-based NMR measurement to detect and quantify different fluid ...
ByVista Clara, Inc based in Mukilteo, WASHINGTON (USA)
Our skills will support you in a wide range of sectors. With each one their challenges and rules/standards. Solution tailor-made for energy industry. ...
ByEIA-Solution based in Lyon, FRANCE
Our skills will support you in a wide range of sectors. With each one their challenges and rules/standards. Solution tailor-made for oil & gas ...
ByEIA-Solution based in Lyon, FRANCE