METHOD AND DEVICE FOR A COMBINED TREATMENT OF DOMESTIC SEWAGE AND DOMESTIC BIODEGRADABLE GARBAGE

摘要

The invention is a method and device for the combined treatment of sewage an/or waste water and biodegradable garbage. The treatment method for the liquid phase of the waste is mechanical treatment (rake, sand, trap, etc.), including fat and grease removal, primary aerobic treatment (BOD5 and COD removal and nitrification), secondary anaerobic treatment (Denitrification, Phosphorus removal) (8) and tertiary treatment before sterilisation. The treatment method for the biodegradable garbage from which the wooden compounds have been removed together with the different sludges (raw sewage sludge or primary sludge, secondary sludge from the primary treatment, tertiary sludge from the secondary treatment) is primary treated anaerobically in a hydrolysis device (9), secondary together with the fats and grease ananerobically in a methane fermenting device (11), tertiary aerobically in draining and/or drying device (13) and at least aerobically composted with the shredded wooden compounds in a composting device. The locally available natural energies (solar thermal energy, gravity) as well as the energy produced by the method and device itself (gassing pressure, aerobic catabolic excess heat) are used for the functions of the plant to avoid costly machinery. The plant is preferably designed as a compact tower, using the fucntional principle of fixed dome plants for ananerobic fermentation.