Catalogue

Plants, equipment and machines for water treatment

(Only registered users can download the catalogue)

Compactor

The screened material retained by the screens of the civil or industrial wastewater treatment plants often have the disadvantage of containing a high percentage of water and/or faecal material with consequent increase of the storage and transport costs. The compactors solve this problem by washing, compacting and dewatering the screened material. The most used compactors for those applications are the hydraulic and screw types. The dedicated sheets give a description of the characteristics and advantages for each of them. To facilitate a prompt selection of the size more suitable for the specific case, the sheets include, in addition to the nominal flow of each model, also three useful option tables. The values of those tables are based on the fact that in most cases the compactors are located downstream the coarse or fine screens for the compaction of the material screened by them. Often it occurs that the compactor is connected with a conveyor which collects and transports the materiel screened by several screens. The quantity of screened material depends, in this case, on the number of screens and their filtration gap.
Typical applications are:
- compactor connected with coarse screen only,
- compactor connected with fine screen only, where there is no coarse screening,
- compactor connected with the coarse and fine screens at the same time,
- compactor connected with fine screen, where an upstream coarse screening is serviced by separate compactor.
It can be easily understood that in the second case the screened material arriving to the compactor is the same as that of the third case as the fine screen has to retain also the matters of greater size, retained in the third case by the coarse screen. Therefore the possible cases are practically three, as much as the options sheets are.
For the selection of the most suitable compactor model it is necessary to identify the option sheet regarding the case being examined and the type of compactor meeting the nominal flow of the plant (m3/day), according to the filtering gap of the upstream screen feeding the compactor.
Obviously the values are theoretic and refer to mid-load civil sewages as these sheets have the only aim at facilitating the compactor model identification.
With regard to the CTGC screw compactor, the standard length is such as to ensure an optimum compaction of the screened material, keeping high sturdiness and stiffening of the screw. Compactors with screw lengths exceeding the standard value can be supplied to meet any distance requirements: however if the discharge distance is considerable, it is recommended to use simple conveyors for the transport and standard compactors for the compaction.
This way all the sturdiness and stiffening characteristics of the screw will remain unchanged.
Any compactors can be made in stainless steel. According to its direct experience and considering the aggressive environmental conditions in which the compactor should operate, SERECO would recommend to always select stainless steel compactors. The higher initial cost will be amortized in a very few years, thanks to the reduced maintenance expenses. For the only screw of the CTGC compactor, we would recommend the standard material (carbon steel adequately heat treated), as it has a high hardness & strength on the surface and toughness in the middle.
We wish to point out that the compaction process can be also carried out directly by special screens, such as the screw filters FC, FCS and FSS.

Compactor

CTG CTGC

ita eng spa fra