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 Cover
Float
Adsorbeco: an antiodour membrane made of active carbon used for the elimination of the odours in waste treatment plants Cover float: the floating support used to sustain membranes of any shape or size. |
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The unpleasant smelling emissions associated with the purification of discharge waters do not normally represent any environmental or health related problems but are the major causes of the disturbance experienced by those who live and/or work in the vicinity of the plant. The problem of odours is greatest during the summer months. During this period, in the afternoon and due to the thermic reversal, the emissions are more frequent and annoying. In order to overcome this problem, many plant operators have sought alternative solutions such as encapsulation of the tanks with HDPE membranes or with glass fibre covering, etc. etc. The reduced gaseous exchange related to these systems normally causes an unacceptable increase in the temperature within the purifying tanks (at times even over 10° C) as well as a considerable reduction of the solubility of the oxygen. Furthermore, the air which is extracted, in any case, must be filtered prior to being freed into the atmosphere. The costs of these types of structures are considerable in terms of both the structure itself and the running of it. The most important defence against the formation of unpleasant odours within purification plants is by far the correctly carrying-out of the various phases involved in the process. Nevertheless, experience teaches us that it is practically impossible to avoid emissions during the most crucial phases (start-up, variation in flow rate and loading, particular meteorological conditions). The integrated adsorbeco and cover float system currently represents the best that the market has to offer. A solution of this type is able to validly contribute in eliminating the contentious between environmental protection system operators (for example, purifiers) and those who will face the negative effects, in the absence of appropriate mitigation. The adsorbeco active carbon cover represents an important added defence which is able to guarantee acceptable situations even in the most critical conditions, allowing the plant operator to adopt less burdensome solutions as the impact with the surrounding environment is practically non-existent. Our solution has already contributed in eliminating, in some circumstances, the contentious between purifier operators and the neighbouring population. The adsorbeco cover has guaranteed practically total efficiency: - odours are not perceptible even at a meter from the plant and efficiency has proven to be optimal even a year from initial installation. - The temperature trend within the oxidising tank is also rather interesting, during the summer period, the cover maintained the temperatures almost equal to the external air temperature, thus allowing a definite improvement of the plant. In summary, the results obtained over the first three years in relation to the plants are to be considered extremely positive and can be synthesised as: -The reduction of the odours emitted to below the perceivable threshold even at areas adjacent to the plant. -Improvement of the quality of life for residents with housing or businesses at areas adjacent to the plant. -Increase in the purifying efficiency thanks to the retaining of the temperature which allows the maximum efficiency of the aerobic process. Technical specification of the Cover float / Adsorbeco The adsorbeco cover is a polyurethane membrane into which high adsorption active carbon micro-granules are inserted with weight in grams ranging up to 500 g/m2 and reinforced by a polyester mesh which guarantees excellent resistance in terms of both tension and elongation. The permeability of the material allows perfect transpiration of the plant without altering the original parameters of the project. The cover, for a sedimentation plant, (where appropriate supports such as grids etc. do not exist) is fitted onto the Cover float which is a support made of inflatable tubing made of polyester fibres spread onto both faces and with a replaceable air chamber. -The support mesh of the antiodour adsorbeco cover is made of a polyester fibre material which is spread and welded to the tubing of high frequency. Apart from supporting the antiodour cover, the mesh applies a tensile force onto the floating tubular structure of the circular tanks and eliminates the risk of accidentally falling into the tanks during the maintenance operations. -The tubular structure is connected to the head of a concentric meshed metallic structure (ring crown) and to the pin of the scrapping bridge; the meshed metallic structure acts as a drain channel blade which replaces the one which is normally used on the drain channels. On the peripheral margin of the carbon cover, there is an apron which is used to ensure the hydraulic seal against the escaping of the gasses which exit through the adsorbeco cover. IT IS POSSIBLE TO MANUFACTURE COVERS OF ANY SIZE OR FORM |
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