Waste water treatment at farms; operating class (SBI'93), 1993-2007

CBS collects data within the framework of environmental statistics on the treatment of urban waste water and on private treatment of waste water of mainly industrial origin. Urban or public waste water treatment involves the treatment of waste water discharged into the sewer by households and businesses. Private waste water treatment is about companies and institutions which have their own treatment plant. In the treatment plants, the waste water supplied (influent) the contaminants removed by mechanical, biological and/or physico-chemical purification techniques. The purified waste water (effluent) is discharged into the surface water. Wastewater treatment creates a residual product, the sewage sludge. In sewage sludge from biological plants, the organic substances are degraded even further (library fermentation). With this biogas is released, which can be used for energy generation. The sewage sludge is subsequently disposed of of the excess water (dewatering). After that, the sludge can, depending on the quality, be reused (for example for compost preparation) or become eventually burned or burned. This table presents the results of the annual survey Wastewater treatment sludge from companies and institutions: the numbers and design capacity of the waste water treatment plants of private companies. In addition, the quantities and destination of the released sewage sludge shown. Data available from: 1993-2007 Amendment as of 29 April 2010: In this table the data from the tables 'Wastewater treatment at companies and institutions; installations“and” Wastewater treatment at companies and institutions; sewage sludge' joined together. The results are broken down by operating class SBI'93. The table has been discontinued due to the transition from the operating class classification SBI'93 to SBI2008. In 2007 new information was 1 company with a waste water treatment plant added so that the total number installations increased by 1. The total capacity for 2007 is not changed because the added installation belongs to the type mechanical installation and not intended for the removal of biodegradable substances. For the years 1996-2005 the SBI is typical of some companies. corrected. Because of this shift, the figures on numbers are installations, capacity and quantities of sewage sludge for the category “D industry” increased by up to 0.6 % for most years. For 2002 the difference is a few percent. The figures for the category ‘Other, not industry’ has decreased by up to 5 % due to the shift, except 2002 where the decrease is 11 % for the number of installations and 30 % for the quantity of sewage sludge. For all subjects, the national totals have not changed. Status of the figures: the figures are final.