WASTE WATER Solutions HUBER Solar Active Dryer SRT Backmixing prevents odour and dust Backmixing accelerates drying Ecient sludge turning ensures complete sludge bed aeration Flexibility of sludge feeding and removal Floor heating for constant drying and maximum eciency

➤ Solar drying of sewage ➤ ➤ sludge Solar drying of sewage sludge is a technology developed from sludge drying beds. The principle is drying of sewage sludge distributed in a greenhouse using incident solar radiation. There are good reason to dry sludge: ➤ Mass reduction ➤ Produce storable and easy-to-handle dried biosolids Operation costs for solar sludge drying are low as the required evaporation energy is delivered by the sun and the easy principle of operation minimises operator attention. Independent sludge turner operation over the entire greenhouse width The special sludge turning system...

➤ Sludge turning and mixing ➤ ➤ device WASTE WATER Solutions The sludge turning and mixing device is the core of the drying system and consists of a rotating double shovel mounted on a travelling frame. The double shovel fulfils two functions: ➤ Sludge turning: As the sludge turner travels forwards with the rotating double shovel, the sludge is being mixed, broken up, aerated and transported. The sludge is completely restacked within only half an hour. This is ideal for a good drying result and prevents odours. ➤ Backmixing of sludge: The sludge turning and mixing device takes up some sludge...

WASTE WATER Solutions Climate probes, ventilators and ventilation flaps are installed in the drying plant to ensure ventilation at the right time and generate sufficient air flow on the sludge surface. Plant ventilation is regulated on the basis of the continuously measured water absorption capacity of the outside and inside air temperature, and excessive condensate build-up is prevented. The ventilators blow dry air over the bed of freshly turned sludge. The climate control system uses not only theoretical calculations but also empirical operation and measurement data. Drying efficiency depends...