A method for testing of sand traps in sewage treatment plants

摘要

The invention relates to a method for testing of sand traps in sewage treatment plants, in which in the normal sand circumference of the operation of the portion of sand in the wastewater stream can be regarded as a sand reason load and with such a large sand test load is superimposed, that the influence of the sand reason load on the test result can be selected arbitrarily slightly. The sand test load is at the circumference of the entrance into the stream of sand added. During the testing time, the pumped from the sand trap sand - water - mixture temporarily in a drainage container, a dry bed or the like, and dehydrated conveyed. The sand is removed from the sand deposited in the sand trap and is in the separation efficiency on the introduced sand test load based. The method serves to determine the degree of separation either in the sand trap with respect to the total grain size range or with regard to a preferred particle size.