(FR2743803-A1)      Organic waste is biologically degraded by mixing with a structuring material then charging to a biological reactor where degradation takes place consisting of a number of parallel troughs (3-10), open at either end and each divided into at least three zones (31-34). Air can be blown into the base of the troughs and liquid collected and withdrawn. Waste for treatment is mixed (11) with a support product and introduced to the first zone (31,41) where air is blown or sucked through it to maintain its temperature at the desired level. After a given length of time the waste is turned and transferred to a second zone (32, 42) where its temperature is held at a lower level than the first, again by blowing air through it. The waste is then turned and transferred to the next zone for further treatment, again with air blowing through it, the residence time in each zone is identical. After the final treatment zone the degradation products are separated (14) from the support product which is then reused.    USE -   Used for treatment of organic wastes such as vegetable material or mud from waste water treatment.    ADVANTAGE -   Both vegetable waste and muds can be treated in parallel reactors simultaneously. The process is economical in material and labour, and useful degradation products are produced. The most vigorous odour-producing reactions occur in the initial zones which can be covered and the fumes collected and treated.    (EP874791-A1)      Organic waste is biologically degraded by mixing with a structuring material then charging to a biological reactor where degradation takes place consisting of a number of parallel troughs (3-10), open at either end and each divided into at least three zones (31-34). Air can be blown into the base of the troughs and liquid collected and withdrawn. Waste for treatment is mixed (11) with a support product and introduced to the first zone (31,41) where air is blown or sucked through it to maintain its temperature at the desired level. After a given length of time the waste is turned and transferred to a second zone (32, 42) where its temperature is held at a lower level than the first, again by blowing air through it. The waste is then turned and transferred to the next zone for further treatment, again with air blowing through it, the residence time in each zone is identical. After the final treatment zone the degradation products are separated (14) from the support product which is then reused.    USE -   Used for treatment of organic wastes such as vegetable material or mud from waste water treatment.    ADVANTAGE -   Both vegetable waste and muds can be treated in parallel reactors simultaneously. The process is economical in material and labour, and useful degradation products are produced. The most vigorous odour-producing reactions occur in the initial zones which can be covered and the fumes collected and treated.