Biological aerated filter using barley straws as substrate and application thereof

Abstract

The invention discloses a biological aerated filter using barley straws as substrates and an application thereof. The biological aerated filter comprises a filter body, a water inlet pipe, a water outlet pipe, an aeration pipe, a backwash fan, a backwash water pump, a reflux pump and filter material, wherein a filler line and a material supplementing line are arranged on the filter body and the filter material mainly comprises barley straws and active sludge. By using the barley straws as the filler material of the filter, the raw materials are inexpensive and easily available; the barley straws are only needed to be uniformly mixed with the active sludge and do not need to be subjected to other pre-treatment operations so that the operation is easy. The barley straws are gradually decomposed in the filter to release lignin and oxidation products, allelochemical substances such as esters, quinones and phenols, and the growth of harmful algae is inhibited by the allelochemical effect of plants; by using algae in the influent water and gradually decomposed barley straws inside the filter as biomass organic carbon sources, the biological denitrification process is promoted, the water quality is purified, the advantages of low price, ecological safety and the like are achieved and the method is an environment-friendly and safe control treatment method for algae-containing polluted raw water.

Description

technical field

[0001] The invention belongs to the field of environmental protection, and relates to an aerated biological filter with barley straw as a substrate and an application thereof. Background technique

[0002] Eutrophication of water body is the main environmental problem faced by many rivers and lakes at present. When a large amount of nutrients such as nitrogen and phosphorus enter natural water bodies such as rivers and lakes, it will cause algae and other plankton to multiply rapidly, which in turn will lead to a decrease in the dissolved oxygen content of the water body. Aquatic ecosystems have been destroyed. The eutrophication of water bodies is becoming more and more serious. How to effectively control eutrophic water bodies is a hot spot in the field of environmental protection. At present, countries in the world have adopted various measures to control eutrophication, mainly including drainage diversion, deep drainage, sediment exposure and drying, lak...

Images