1992-3

Denitrification involves the bacteria-mediated reduction of nitrate, nitrite and nitrous oxide to atmospheric dinitrogen. The evolved nitrogen gas usually leaves the environment in which it was produced and diffuses to the atmosphere. The process appears in most environments where decomposable organic matter has accumulated, e.g. soils, lake sediments and wetlands. Through the decomposition of organic […]

A pilot plant scale investigation of nitrification of sidestreams from centrifugation of digested sludge was carried out at Bromma sewage treatment plant in the beginning of 1991. The SBR technology (Sequencing Batch Reactor technology) was implemented. The investigations, which have been carried out, showed that the SBR technology is appropriate for nitrification of sidestreams. Complete […]

In June 1990 the Municipality of Frederikshavn inaugurated the world’s first full-scale plant for chemical-physical treatment of the reject water. After a working period of more than a year with adjustments and corrections the plant is working very satisfactorily, and together with the planned installation of the French developed BIOSTYR system the reject water treatment […]

The pH of seawater is dependent on shifts in the autoprolysis of hydrogen carbonate 2 HCO3-= CO2 + H2O + CO32-caused by the production and decomposition of planktonic maiter. Using stoichiometric relationships and mean concentrations of nitrate and phosphate it is shown that surface seawater will have a pH close to 8 at 15°C on […]