For the non-linear characteristics of dissolved oxygen(DO) concentration control of activated sludge wastewater treatment process,with DO as a controlled object and the international evaluation benchmark as a platform,PID,gain scheduling and generic model control(GMC) are studied and applied to the DO control,and the performances of these controllers are compared.
For the non-linear characteristics of dissolved oxygen(DO) concentration control of activated sludge wastewater treatment process,with DO as a controlled object and the international evaluation benchmark as a platform,PID,gain scheduling and generic model control(GMC) are studied and applied to the DO control,and the performances of these controllers are compared.
Activated carbon was prepared from the sewage sludge of municipal wastewater treatment plant by chemical activation (activation reagent is ZnCl2) and was used for the adsorption of dye (reactive brilliant red K-2BP).
Great efforts have been made on water pollution control and a number of renovated technologies and processes for municipal wastewater treatment and reclamation as well as non-point pollution control have been developed and applied in China.
Long-term sampling and analysis were conducted in a domestic wastewater treatment plant for the investigation on the characteristics of the representative contaminants in raw sewage such as SS, COD, BOD5, TP, and TN.
From this point of view, the process of sewage treatment does not reduce but elevate the risk of NPEOs, which becomes the main source of these small NPnEO in the environment.
A bacterial strain, ZY3, growing on sex steroid hormones as the sole source of carbon and energy was isolated from the sewage treatment plant of a prophylactic steroids factory.
A Delftia tsuruhatensis strain capable of consuming aniline as the sole source of carbon, nitrogen, and energy at concentrations of up to 3200 mg/l was isolated from activated sludge of the sewage disposal plants of OAO Volzhskii Orgsintez.
In 1993, Western Europe, the United States, Canada, Japan, Australia and New Zealand produced a total of 480 million tonnes of industrial waste and 8 billion tonnes from activities such as energy production, agriculture, mining and sewage disposal.
Coordinated environmental, ecological and biochemical studies have been applied to assess the impact of sewage disposal in a fjordic system near Bergen, Norway.
The present paper describes the efficiency of this stage of treatment in the following situation: The river pollution is caused by one jet of final effluent (from a sewage disposal works) discharging during a finite time interval.
Polar pollutants in the waste water of the Thessaloniki waste water treatment plant were qualitatively examined by substance-specific detection and identification methods.
From anaerobic digestor sludge of a waste water treatment plant, a gram-negative, strictly anaerobic sulfate-reducing bacterium was isolated with acetone as sole organic substrate.