Patent ID: 9452943
Filing Date: 2016-09-27
CPC Classification: C02F,C12M,Y02E

Claim Text:
1. An anaerobic water purification system for treating a liquid, comprising: a container for the liquid for treatment provided during use with a sludge bed; a supply conduit operatively connected to the container for supplying the liquid for treatment; a distribution system connected to the supply conduit for distributing the liquid over the sludge bed, wherein the distribution system distributes the liquid from above over substantially an entire upper surface of the liquid in the container, thereby providing a downward flow of the liquid in the container; carrier material which is arranged during use in the container and to which anaerobic sludge material can attach; and a gas roof arranged at or on the container and comprising a flexible material, wherein the gas roof is provided with a volume which can be adapted during use, by using the flexible material, to biogas production from degrading organic material.