Patent EP-1726570-A1 (EP)
Inventor: DREVET MICHEL
IPC: C05F11/06
Filed: 2006-05-29
Abstract: Container (1) to hold a vegetable substrate for the treatment of liquid wastes comprises: a considerably plane bottom; a frame defining an opening for loading and unloading; side walls extending between the bottom and the frame; at least a cavity considerably angular, bounded by internal walls to the container; and the bottom, side walls and/or internal walls having a structure to ensure the application of the vegetable substrate and to authorize the contact between the air and the vegetable substrate. Container to hold a vegetable substrate for the treatment of liquid wastes comprises: a considerably plane bottom; a frame defining an opening for loading and unloading; side walls extending between the bottom and the frame; at least a cavity considerably angular, bounded by internal walls to the container; and the bottom and/or side walls and/or internal walls having a structure apt to ensure the application of the vegetable substrate and apt to authorize the contact between the ambient air and the vegetable substrate. The frame is inscribed in a plane considerably parallel to the bottom. The volume defined by the bottom, the side walls and the frame, widens from bottom towards the frame. The internal walls extend towards and on at least part of the height of the container, leaving a distance within the internal walls that decreases from the bottom towards the top of the cavity. Independent claims are included for: (1) an installation for the treatment of liquid effluents (18) on a vegetable substrate (28) comprising: at least a buffer-tank (17) for liquid wastes, optionally equipped with cleaning (20) and/or filtration (23) unit; at least a treatment module (10), comprising the container, preferably at least four interconnected containers, of which each is filled with the biologically active vegetable substrate; a sprinkling device of liquid waste at the treatment module, optionally equipped with an anti-splashing device (11); a recovery unit for the effluents sprinkled in excess; a unit for circulating effluent liquid between the buffer-tank and one or more treatment modules and the recovery unit; an accumulation device of heat and/or protection of one or more modules against the bad weather, preferably a greenhouse, equipped with at least an entry and an exit of air, optionally equipped with a ventilation device, preferably a mechanical ventilation to establish a circulation of air enters the interior and the exterior of the accumulation device; (2) a process of liquid effluent treatment on a vegetable substrate by evaporation and/or aerobic degradation of the organic load of liquid effluents, comprising: providing a container; loading the container with the bio-active vegetable substrate, preferably a compost of green residues optionally comprising structuring elements of the substrate; storing the liquid effluents in the buffer-tank and optionally filtering the liquid effluents; sprinkling the vegetable substrate with the liquid effluents to maintain the humidity of substrate between a predetermined lower and higher limits, preferably the climatic conditions and/or the season of the year; supporting the air circulation in contact with the humidified substrate, at least on the level of the side walls and internal walls of the container, to evacuate the moisturized air and to replace it by relatively dry air and/or the accumulation of heat in the substrate to improve evaporation of the liquid effluents and/or the aerobic microbiological activity within the substrate to degrade at least partially the organic load optionally present in the liquid effluents; (3) an enriched vegetable substrate susceptible to be obtained at the end of the process; and (4) soil enrichment for agriculture or horticulture, comprising an enriched vegetable substrate.