GB2444901A

GB2444901A - Portable drainage module

Info

Publication number: GB2444901A
Application number: GB0625224A
Authority: GB
Inventors: Jonathan Michael Buonaparte; Nigel Anthony Chute
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-19
Filing date: 2006-12-19
Publication date: 2008-06-25
Also published as: GB0625224D0

Abstract

The present invention relates to a portable drainage module which is configured to facilitate the draining of different sizes of cans and bottles into a sump, where said cans and bottles (701, 702, 703, fig 8) are required to be recycled. Said portable drainage module comprises a drainage rack 301 provided with brackets 302 to retain said containers, a tray 303 to retain said rack, provide a sump 304 and means such as a flange (407, fig 4) for lifting and pouring said liquids without spillage from said tray into another vessel. In a preferred embodiment said rack is retained within said tray in a removable and reversible manner and is manufactured from zinc plated steel wire. Preferably said tray is manufactured from a plastics material such as polyethylene by a process of rotational moulding. The drainage rack may be manufactured from wire and made from steel, which can be provided with a corrosion resistant coating.

Description

Portable Drainage Module The present invention relates to a portable

drainage module configured to facilitate the draining of different sizes of cans and bottles into a sump.

At the present time there is a growing trend towards the recycling of materials where possible This trend is accompanied by a concern for minimising harm to the environment by pollutants such as carbon and toxic emissions These trends are now being reinforced by present and incoming legislation across industry It is common in many industries for liquids to be supplied in cans arid bottles manufactured from plastics materials such as polyethylene or polypropylene. Historically such cans and bottles have been disposed of either by burying in landfill sites or by burning As a consequence of such landfill sites becoming full and of increasing concern for the environmental damage caused by burning, there is a growing body of legislation requiring such containers to be recycled.

By way of example, the farming industry uses a large number of plastic bottles and cans in the course of such activities as the application of fertilisers and pesticides to crops. In the UK alone the quantity used of such containers is present!y estimated at hundreds of thousands of tons per annum, by around 40,000 users Typically, said application is by means of spraying Owing to the toxicity of many of the chemicals supplied in these containers, said containers have historically been disposed of by burning to prevent any traces of said chemicals from polluting the environment However, it is envisaged in the near future that disposal of said containers by burning will become illegal.

Legislation is already in place requiring the recycling of other plastic products such as sheeting. At the present time plastics containers are exempt from said legislation in the UK but when the anticipated directive entitled Environmental Agency Agricultural Waste Regulations becomes law in the UK on 15 May 2007 all such containers will have to be recycled.

Whilst recycling companies now accept and process waste products such as plastics sheeting, said companies have applied conditions concerning the return of plastics containers. For example, said companies have stated that all such containers must be supplied clean.

A facility exists for the containers to be cleaned to the required standard Where said containers are being used in the course of spraying activities, the spraying machinery is commonly provided with a washing facility described as an induction hopper. Said induction hopper takes the form of a sink attached to the sprayer, which enables unused solution to be returned to the sprayer. Said induction hopper also provides rinsing means for the containers, where said containers may be cleaned by a process described as triple rinsing to remove as much as possible any traces of chemicals.

However, a problem has been identified concerning the return of plastics containers. In order that they can process said containers the recycling companies have stated that in addition to being supplied clean all such containers must also be drained. Whilst therefore the required standard of cleaning of the containers is satisfied by said triple rinsing, the anticipated requirement for recycling of said containers is effectively frustrated by the lack of suitable means for draining According to a first aspect of the present invention, there is provided a portable drainage module configured to facilitate the draining of liquids from a plurality of sizes of container into a sump, comprising a drainage rack, a tray to retain said rack, and means for pouring said liquids out of said tray.

In a preferred embodiment said invention comprises a drainage rack manufactured from steel wire Incorporating means for maintaining said containers in a suitably upright position for draining, where said rack is retained within a tray manufactured from a tough plastics material The invention will now be described by way of example only, with reference to the accompanying drawings, in which.

Figure 1 shows the triple rinsing of a plastics container in an induction hopper, Figure 2 shows triple rinsing of a plastics container in an induction hopper provided with two portable drainage modules; Figure 3 shows a portable drainage module comprising a drainage rack retained within a tray, Figure 4 shows an exploded view of the portable drainage module shown in Figure 3, Figure 5 shows a section through the centerline of the portable drainage module shown in Figures 3 and 4; Figure 6 shows a plan view of the drainage rack shown in Figures 3 to Figure 7 shows a plan view of the drainage rack shown in Figures 3 to 5 containing a plurality of containers, Figure 8 shows a portable drainage module containing a plurality of containers, Figure 9 shows a detail of the drainage rack shown in Figures 3 to 8, Figure 10 shows a section through the drainage rack detail shown in Figure 9; Figure 11 shows a section through the portable drainage module shown in Figure 7; Figure 12 shows a portable drainage module containing a plurality of containers different from those shown in Figures 7 and 8, Figure 13 shows a section through the portable drainage module shown in Figure 12, Figure 14 shows an operative returning unused chemicals to the sprayer by pouring from the tray of said portable drainage module into the induction hopper, Figure 15 shows an alternative embodiment of a portable drainage module, Figure 16 shows a plurality of containers being compacted by a bailing machine; Figure 17 shows containers being removed for recycling; and Figure 18 shows a second alternative embodiment of a portable drainage module.

Figure 1 An operative 101 is shown in Figure 1 standing by a sprayer 102 which is fitted with an induction hopper 103 The operative 101 is engaged in triple rinsing a container 104 in said induction hopper 103 prior to placing said container 104 into a recyclng bag 105. A problem with this arrangement is that said container 104 contains traces of liquid such that said container 104 will not be in an acceptable condition for the recycling companies In the event that said recycling companies decided to accept said container 104 in said condition they would still have the problem of the recycling bag 105 being contaminated with fluid Said contaminated recycling bag 105 would additionally constitute a major transportation hazard The operative 101 is shown wearing protective clothing 106 and protective gloves 107 to prevent any contamination. Said protective clothing 106 includes aprons, rubber boots, face shield and face masks Said protective gloves 107 are typically nitrile supported, where said gloves can be slippery when wet Combined washing and drainage tanks are known which have the capability to accommodate containers such as 104, where the tanks are large and typically manufactured from galvanised steel sheet There are however a number of significant drawbacks to said tanks A first problem is that said tanks are too large and too heavy to be portable. Portability is important to enable suitable proximity of any drainage device to said induction hopper 103.

A second problem is that since the triple rinsing facility already exists in the form of the induction hopper 103 the operative 101 has no requirement for a second such triple rinsing facility The plumbing arrangements to enable said triple rinsing facility also contribute to the size and weight of said tank which contributes to the lack of portability of said tank.

A third problem is that because of the combined size, weight and complexity of the tanks said tanks are expensive to buy, typically costing up to 1000 GB High costs would have a negative impact on farm budgets, at a time when said budgets are under pressure from the need to comply with the incoming legislation concerning recycling.

A fourth problem, related to the third said problem, is that triple rinsing of containers can occur at more than one site For example, on a farm comprising 1000 acres of arable land said triple rinsing may occur at around four sites It will be appreciated that the problem concerning cost is therefore magnified in the event that four said combined washing and drainage tanks have to be purchased in order to comply with the aforementioned legislation A fifth problem, which is a consequence of the third and fourth said problems, is that if only one said combined washing and drainage tank is purchased, all rinsing and draining could be carried out on one site only It should be pointed out that spraying on farms is heavily affected by weather conditions, and the requirement to complete spraying tasks within a particular timescale is paramount A significant disadvantage of having only one combtned washing and drainage tank is the need to keep returning to said site with the empty containers causing major time losses Figure 2 An operative 101 engaged in substantially the same operation described in Figure 1 Adjacent to the induction hopper 103 however are positioned two portable drainage modules 201 and 202. Portable drainage module 201 contains a container 203 similar to container 104, said container 203 having been turned upside down and placed at right angles to drainage module 201 in order to drain any solution, where said container 203 has first been triple rinsed in the induction hopper 103 A further portable drainage module 202 is situated underneath the induction hopper 103 It is most important that no contamination from said induction hopper 103 makes contact with the floor 204. If said contamination does occur it is necessary to clean up every trace to the required and stringent industry standards as applied by the Environmental Agency Said cleaning up exercise can be very costly, typically at present around 2000 GB per incident When used in said application the drainage module 202 operates as a portable bund which will catch any drips or splashes from said induction hopper 103, such that any such drips or splashes may be readily recycled back into the sprayer 102 via the induction hopper 103 The height indicated by arrow 205 of said portable drainage module 202 is configured to fit underneath the induction hopper 103 when said induction hopper 103 is positioned at the usual operator height settings.

Figure 3 A portable drainage module 201 shown in Figure 2 is further illustrated in Figure 3 A drainage rack 3011 is configured to provide a platform on which containers may be positioned upside down and left to drain Said positioning is facilitated by the incorporation into said rack 301 of container retaining brackets 302 which are configured to hold said containers inside their necks, thereby maintaining said containers substantially at right angles to said platform.

In a preferred embodiment said rack 301 is manufactured by a process of bending and welding of steel wire. Preferably, said wire is mild steel, coated in a protective layer in order to resist corrosion. In a preferred embodiment, said coating is an electro-plating of zinc described as JS500 It will be appreciated however that said coating could also take the form of epoxy coating, plastics coating such as polyethylene or nylon, or alternatively integrated into the wire itself in the form of the chromium in stainless steel Said drainage rack 301 is removably retained within a tray 303, where said tray provides a sump 304 in which all drained solution is collected, Upon completion of said collection process the tray 303 may be emptied back into the induction hopper 103 shown in Figure 2 via a spout 305 which is incorporated into the design of said tray 303.

In a preferred embodiment said tray 303 is manufactured by a process of rotational moulding in plastics Preferably, said plastics is polyethylene, typically medium density polyethylene (MDPE) A first advantage of said plastics is high strength and robustness A second advantage of said plastics is its resistance to the levels of chemicals to be encountered in the application, although said levels of chemicals are expected to be low A third advantage of said plastics is that an insert can be provided in the moulding tool to create a logo in relief 306 together with other graphical information.

Figure 4 The portable drainage module 201 previously seen in Figure 3 is shown in Figure 4 as an exploded view In order to removably retain drainage rack 301 within the tray 303 a plurality of sills are provided at an optimum height indicated by arrow 405, where said optimum height is defined as allowing sufficient wall height 406 on said tray 303 to enable effective retention of the containers being dried, whilst at the same time allowing sufficient depth 406 to permit the accumulation of drained solution in the sump 304 without said drained solution making contact with said rack 301 In a preferred embodiment said plurality of sills number four 401, 402, 403, and 404 and are located in each of the corners of said tray 303 An advantage of said sill location is that when said tray 303 is manufactured by a process of rotational moulding the cost of the mould is less than it would be if the sills ran all the way round at a height indicated by arrow 405 This is because less folding and fabricating of steel sheet is required in order to produce said mould.

A flange 407 is provided along the upper edge of the tray 303 in order to provide two functions The first said function is to provide rigidity in the wall section and prevent warping during cooling after ejection from the mould The second said function is to provide effective handling means so that an operative 101 such as that seen in Figures 1 and 2 can grip the tray 303 whilst wearing the necessary protective gloves 107 without slippage or risk of dropping said tray 303 and spilling said drained solution thereby causing contamination, In the floor of the tray 303 is provided a plurality of fine creases 408, where said creases provide rigidity in the wall section and prevent warping during cooling after ejection from the mould In a preferred embodiment said creases 408 number four.

Figure 5 The portable drainage module 201 shown in Figures 2 to 4 is shown as a sectional view. The drainage rack 301 is retained in the tray 303 to provide a platform on which containers may be positioned upside down and left to drain, where said positioning is facilitated by the incorporation of container retaining brackets 302 facing upwards Said drainage rack 301 is retained on a plurality of sills such as 401 and 404 such that a sump 304 is provided beneath said drainage rack 301. The handling flange 407 is seen protruding over the tray wall 406 to provide a good grip A consequence of the tapered profile of the tray 303 is that a plurality of said trays may be readily stacked, for example on a pallet for delivery to customers. Similarly, the drainage rack 301 is also substantially stackable in that said racks readily nest together A first advantage of said tray 303 and said drainage rack 301 being stackable is that delivery costs to farmers are minimised A second and subsequent advantage of said tray 303 and said drainage rack 301 being stackable is that the negative environmental impact of said delivery for each portable drainage module 201 in terms of carbon emissions and the like is also minimised.

Figure 6 The drainage rack 301 shown in Figures 3 to 5 is shown as a plan view in Figure 6. Said drainage rack 301 is provided with a frame 601 for rigidity and overall sturdiness of use. In a preferred embodiment said frame 601 has a size of 750 millimeters by 600 millimeters A plurality of container retaining brackets 302 is provided to hold said containers, where said retaining brackets 302 are located in positions suitable to accept the required containers In a preferred embodiment, therefore, container retaining brackets 602, 603, 604, 605, 606, 607, 608, 609 and 610 are spaced a sufficient distance apart to accept certain sizes of containers, and container retaining brackets 611, 612, 613 and 614 are spaced a sufficient distance apart to accept certain other sizes of containers In addition to their different spacings, however, said container retaining brackets 602, 603, 604, 605, 606, 607, 608, 609 and 610 also have a different size from container retaining brackets 611, 612, 613 and 614 so as to fit the different sizes of container necks, Figure 7 Said containers being retained in the drainage rack 301 previously shown in Figure 6 are shown in Figure 7 as a plan view. The layout of retaining brackets 302 is configured to accept different combinations of different sized containers, where the requirement is to maintain all said containers in an upright condition for draining, 607, 608, 609 and 610 are located to accept containers of 5 litres 701 and 10 litres 702 Container retaining brackets 611, 612, 613 and 614 are located to accept containers of 2 litres 703, 1 litre 704 and 300 grammes 705 for example Further containers 706 can be introduced in-between those affixed to said containerretaining brackets because said brackets provide a sufficiently tight fit which prevents said containers from falling over. The drainage rack 301 can therefore be completely filled with a plurality of different containers as required.

Figure 8 Some of the containers previously shown In Figure 7 are seen in Figure 8 as a perspective view Said containers such as 702 are supported entirely by container retaining brackets such as that shown at 604 and require no additional means of support such as tray wall 406.

Figure 9 A container-retaining bracket such as that shown at 604 is shown in Figure 9. A profile not unlike a top hat is formed by a jig in the course of production of the rack such that four bends 901, 902, 903 and 904 are created in each of the two corresponding lengths of wire. A weld 905 is introduced to add strength to the joint Figure 10 A section through the container-retaining bracket 604 previously shown in Figure 9 is shown in Figure 10 Affixed to said container retaining bracket 604 is a container 702 having a neck 1001 where said neck has been pushed downwards over said retaining bracket 604 Said downwards pushing action is assisted by the bends such as 901 and 902 created in each of the two corresponding lengths of wire, where said bend facilitates the feeding of the container neck 1001 onto said retaining bracket 604 An advantage of said effect is that it is not necessary to apply the container at exactly ninety degrees to the rack 301 to achieve an exact fit of said container onto said retaining bracket 604 Said effect is further enhanced by the provision of a shiny zinc plated finish on the rack 301.

As has previously been stated, in a preferred embodiment container retaining brackets 602, 603, 604, 605, 606, 607, 608, 609 and 610 are made at the correct size to accept containers of 5 litres 701 and 10 litres 702, whilst container retaining brackets 611, 612, 613 and 614 are made at the correct size to accept containers of 2 itres 703, 1 litre 704 and 300 grammes 705 for example It has been established that the internal neck diameters of most 5 and 10 litre 702 containers, as defined by arrow 1002, are substantially identical, that is a clearance of 54 millimeters. Equally, it has been established that the internal neck diameters of 2 litre, 1 litre and 300 gramme containers, for example, are also substantially identical, that is a clearance of 39 millimeters. It is therefore possible for all common container sizes of 5 litres and above to be affixed to said plurality of container retaining brackets 602, 603, 604, 605, 606, 607, 608, 609, 610 and 611,612, 613, 614.

Figure 11 The container-retaining bracket 604 is shown in section in Figure 11 as part of the drainage rack 301, where said drainage rack 301 is retained within tray 303 Shown draining on the rack are different sizes of container including litres 701, 10 litres 702 and 2 litres 703.

Figure 12 Figure 12 shows the portable drainage module 201 fitted with a drainage rack 301 where said rack has been turned over through 180 degrees such that the container retaining brackets such as 602 are now on the underside of said rack 301, and such that the upper surface of said rack 301 therefore is now flat Shown retained on said rack 301 are an alternative pair of containers 1201 and 1202 from those shown in Figures 7 to 11. First said alternative container 1201 has a 20-litre capacity and second said alternative container 1202 has a 15-litre capacity On the ground adjacent to the portable drainage module 201 is another 20 litre container 1204 waiting to drained in said portable drainage module 201. Said 20 litre container 1204 is provided with a substantially flat top which enables it to remain upright when placed upside down on said rack 301 for draining purposes Similarly, container 1202 with a 15-litre capacity has a flat top and so may also be placed upside down on said rack 301 The container retaining brackets such as 602 are not therefore required for 1 5 and 20 litre containers, six of said container sizes fitting into the portable drainage module 201, where 15 and 20 litre containers have the same plan footprint or plan area of 290 millimeters by 240 millimeters.

Figure 13 The portable drainage module 201 seen in Figure 12 is shown as a sectional view in Figure 13 Containers such as 1201 and 1202 are supported by the flat surface of the rack 301 for draining purposes, where the container retaining brackets such as that shown at 602 are suspended beneath said rack 301 The extremities of said container retaining brackets 602 are located above the sump 304 such that said retaining brackets 602 do not come into contact with any of the solution drained from said containers 1201 and 1202 Figure 14 An operative 101 returning unused chemicals to the sprayer 102 by using the portable drainage module 201 is shown in Figure 14. Having first removed the drainage rack 301 said operative pours the drained solution 1401 through the spout 305 back into the induction hopper 103. Situated beneath said induction hopper 103 is another portable drainage module 202, where said portable drainage module 202 operates as a portable bund which will catch any drips or splashes from said induction hopper 103, such that any such drips or splashes may be readily recycled back into the sprayer 102.

Figure 15 An alternative embodiment of the invention is shown in Figure 1 5. A portable drainage module 201 is fitted with a drainage rack 1501 where said rack has been manufactured by a different process from that described in Figures 3to 13 In a preferred embodiment said rack 1501 is manufactured by a cuffing out a panel made from steel mesh 1502 and welding said mesh panel 1501 onto a frame made from steel wire 1503. A plurality of container retaining brackets such as that shown at 1504 are provided on said rack 1501, where said brackets 1504 are made by cutting lengths of steel tubes 1504 and welding said tubes onto said rack Preferably, said steel tubes 1504 are substantially square in section to enable solution to drain more readily from containers, where contact of said tubes onto the necks of containers is made at four points rather than for the entire inside circumference of said necks Preferably, the wire for said mesh panel 1502 and frame 1503 wire is mild steel, coated in a protective layer in order to resist corrosion. In a preferred embodiment, said coating is an electro-plating of zinc described as JS500 It will be appreciated however that said coating could also take the form of epoxy coating, plastics coating such polyethylene or nylon, or alternatively integrated into the steel itself in the form of the chromium in stainless steel Figure 16 A bailing machine 1601 used to compact and bail waste plastics products such as container 104, where said container has been crushed by a ram 1602 is shown in Figure 16 When said waste products have been compacted into a cuboid shape 1603 wire ties 1604 are used to stabilise said cuboid. Typically, said cuboid will be of a size suitable for transporting on a standard pallet.

Typically, said bailing machine 1601 is of a type having 20 tons pressure. Said type of machine can be mounted on a flatbed truck for transport An advantage of said transport is that bailing services of the kind described can be offered to farms as part of a recycling collection service Figurel7 The cuboid of compacted containers 1603 is shown placed on a pallet 1701, said pallet having been loaded onto a lorry 1702 for transportation to a recycling plant. Alongside said cuboid of compacted containers 1603 is shown storage bag 105 full of containers, where said storage bag is also placed on a pallet 1703 Where the containers nside bag 105 have been drained, said bag is now substantially dry and no longer constitutes a major transportation hazard of the kind described in Figure 1.

As has already been explained Figures 1 to 17 illustrate particular embodiments of the invention to be used for the draining of chemical containers in agricultural environments. It will be appreciated, however, that the present technology is equally suitable for draining many other kinds of plastics or metal containers Since it is envisaged that under the anticipated recycling directives all such cans and bottles will be required to be recycled, it is envisaged that the benefits of the present invention will apply as much to said other kinds of plastics or metal containers as to those for agricultural chemicals Figure 18 A third embodiment 1801 of the rack shown in Figures 6 and 7, where said third embodiment is configured to drain containers used for oil is shown in Figure 18 Typically, said oil is engine oil of the kind commonly used in servicing garages, where said containers are required to be recycled if possible Incoming legislation is expected to stipulate that when a container is drained of at least 99 percent of its contents it can be recycled, whereas when said container is drained of less than 99 percent of its contents it cannot be recycled and instead is classed as hazardous waste. Since the collection of hazardous waste is charged at an expensive rate it will be appreciated that the present invention offers cost savings in addition to the environmental benefits.

Typcally, containers used for engine oil are of a different shape 1802 from those used for agricultural chemicals For example, many containers 1802 are substantially slim and substantially elliptical. Rack 1801 is therefore provided with plurality of container retaining brackets 1803 whch are configured so as to provide retaining means for said substantially slim and substantially elliptical containers In a preferred embodiment, said container retaining brackets 1803 number five across the width of the rack and four down the length of said rack 1801, where said rack 1801 is provided with the same size frame 1804 as that shown in Figures 6 and 7, such that said rack 1801 is removeably retained within original tray 303 Similarly, rack 1801 is turned over to provide a draining platform for larger containers such as 20 litre cyhndncal oil drums 1804 and 1805, where said drums have substantially flat tops similar to that of container 1201 seen in Figure 12. Similarly, container-retaining brackets 1803 are not required for drums 1804 and 1805.

Claims

Claims 1. A drainage module configured to facilitate the draining of

liquids from a plurality of sizes of container into a sump, comprising a drainage rack, a tray to retain said rack, and a lifting device for lifting and pouring said liquids out of said tray
2. A drainage module according to claim 1, wherein said vessels are maintained in a substantially upright position to facilitate draining
3. A drainage module according to claim 2, wherein said substantially upright vessel position is assisted by the incorporation of vessel retaining features on said drainage rack.
4. A drainage module according to claims 1 to 3, wherein said drainage rack is manufactured from wire
5. A drainage module according to claim 4, wherein said wire is manufactured in steel, on
6. A drainage module according to claim 5, wherein said steel is provided with a protective corrosion-resistant coating
7. A drainage module according to claim 6, wherein said corrosion-resistant coating is zinc
8. A drainage module according to claim 7, wherein said zinc coating is JS500
9. A drainage module according to claim 5, wherein said steel is stainless steel
10. A drainage module according to claims 4 to 9, wherein said wire drainage rack is manufactured by a process of bending and welding said wire
11. A drainage module according to claims 4 to 10, wherein said wire is configured to provide said vessel retaining features
12. A drainage module according to claims 4 to 11, wherein said vessel retaining features have sides configured substantially at right angles to said rack.
13. A drainage module according to claims 3 to 12, wherein said rack is provided with said vessel-retaining features of more than one size
14. A drainage module according to claims 4 to 10 and 12 and 13, .-.4,. -.-..-., .-I_,.j * 4k 44 k -iei i Qlu vez,i ecUules ar.JI uviuu LJ LI e aLLacu mni tubular sections
15. A drainage module according to claim 14, wherein said tubular sections are manufactured from metal
16. A drainage module according to claims 3 to 15, wherein said rack is removable and reversible
17. A drainage module according to claims 1 to 16, wherein said module is capable of holding vessels where said vessels have different sizes.
18. A drainage module according to claim 17, wherein said vessels are manufactured from a plastics material
19. A drainage module according to claims ito 18, wherein said container is provided with a facility to retain said rack.
20. A drainage module according to claims 16 and 19, wherein said retaining facility enables the removal and reversal of said rack.
21. A drainage module according to claims 19 and 20, wherein said rack retaining facility is a sill incorporated in said container.
22. A drainage module according to claims 19 to 21, wherein said rack is retained at a sufficient height above the container floor to create a drainage sump.
23. A drainage module according to claims 1 to 22, wherein said container is provided with a spout for the pouring of liquids
24. A drainage module according to claims 1 to 23, wherein said container is provided with a flange lip to assist handling by users wearing protective gloves
25. A drainage module according to c!aims 1 to 24, wherein said container is stackable
26. A drainage module according to claims 1 to 25, wherein said container is manufactured from a plastics material
27. A drainage module according to claim 26, wherein said manufacturing of said plastics container is by a process of rotational moulding
28. A drainage module according to claim 26, wherein said manufacturing of said plastics container is by a process of injection moulding.
29. A drainage module according to claim 26, wherein said manufacturing of said plastics container is a process of vacuum forming of plastics sheet.
30. A drainage rnodue according to claims 1 to 29, wherein said plastics material is polyethylene
31. A drainage module according to claims I to 30, wherein said drainage module is portable
32. A method of manufacturing a drainage module configured to enable the draining of liquids from a plurality of sizes of container into a surnp, comprising a drainage rack, a container to retain said rack, and means for lifting and pouring said liquids out of said container
33. A drainage module substantially as herein described with reference to the accompanying figures
34. A method of manufacturing a drainage module substantially as herein described with reference to the accompanying figures.