![]() ![]() Floating garbage is best collected by small boats using a scoop net or as the figure below shows, two vessels working together using a floating net boom.įigure 24: Two vessels towing a floating boom and net across the river to collect floating debris It is advisable to have separate containers to facilitate the segregation of waste into recyclable dry waste, wet organic waste that can be composted and hazardous waste which needs special care in disposal. The harbour master must ensure that adequate containers are strategically placed within the harbour complex for collecting the litter. In Thailand, old tyres are converted into garbage bins. Wet organic matter can be converted into compost. Paper, plastic, glass and aluminium cans can be recycled. This involves collecting and sorting the discarded materials suitable for recycling. For instance, if the fishery harbour supplies engine oil to boats, it may be better to buy one 50-litre can instead of 50 one-litre cans. Probably the key to minimizing this waste is to encourage the use of products that need less packaging or buying in bulk. Some of the waste may be biodegradable and the rest non-biodegradable.įigure 23: DISCARDED NON-TOXIC WASTE 4.3.1 Reduction This type of waste not only makes the harbour look dirty, it can clog drains, foul boat propellers, choke water intakes and so on. Typical non-toxic wastes in a fishery harbour include paper, plastic bags, plastic containers, metal containers, old tyres, pieces of rope, bits of netting, food wrappers, bottles, fruit peels and flotsam like driftwood, generally termed as litter. We shall now look at the above wastes in terms of their classification and suggested disposal. Estimating the quantities is a matter of judgement based on existing practices. The table below lists typical harbour activities and the wastes associated with them. The harbour master should group the harbour area into zones according to the activity performed in each zone and analyse them individually for the kind of waste generated the probable quantities and the method of disposal. The fishery harbour complex has many activities within the complex and each of them may be a point source of waste. It should then be possible to evaluate from practical and cost considerations which of the '3 R's' or disposal is most suitable for the fishery harbour complex with a given set of local conditions. The audit should help identify the source, quantity and concentration of all waste streams. This is a management tool that enables him to evaluate policy and remedial actions. In a fishery harbour complex, the harbour master should perform a 'waste audit'. It reduces the amount of waste for disposal saves natural resources and provides jobs for scrap collectors and dealers. Recycling refers to reclaiming materials from the waste product such as scrap metal recycling or transforming waste plastic or paper into new products. ![]() Reuse refers to using the waste material 'as is' - such as using waste oil for fuel. ![]() In fact, source reduction is really not about managing waste, but about managing the raw materials more carefully in the first place. It is accomplished by using less polluting materials in place of highly polluting ones implementing processes that generate less waste and good operating practices. Reduction refers to minimizing the amount of waste generated from a given operation or process. Waste minimization is achieved through the practice of the '3 R's' - reduction, reuse and recycling. While some form of such treatment may be required, it is often far more practical and cost-effective to minimize the amount of waste generated in the first place. In the past the approach to waste management was to look at wastes as an 'end-of-the-pipe problem' and adopt appropriate treatment technologies. oily waste including accidental oil spills.non-toxic solid waste including flotsam washed into the harbour.Typically they may be further categorized as: degradation of the harbour environment by discarded litter and fish offal.invisible pollution of harbour water by hazardous wastes and.visible pollution of land and water by oil spills and sewage.Pollution from harbour-generated wastes can be categorized as those that cause: Floatable material may escape from the area and end up along the coastline and beaches causing further damage to ecology and aesthetics. In the absence of adequate facilities for collection, treatment and disposal systems, these wastes will pollute the harbour complex and the harbour waters. The fishery harbour complex is a hub of activities with nearly all of them being potential waste generators.
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