Waste ManagementUseful Information - Sewerage

Sludge disposal

In implementation of JMD 80568-4225-91 “Methods, conditions and restrictions for the use of sludge from domestic and urban waste treatment in agriculture”, upon authorisation by the competent Regional Authority, the calcified sludge stored from previous years is applied to agricultural crops, in the framework of an action implemented since 2011. The committee responsible for authorisations, composed of members of the Environmental, Health and Rural Development Divisions, following a thorough analysis of the soils to be fertilised and sludge sampling, decides on the amount of sludge to be issued per hectare as a fertiliser, thus limiting the amount of chemical fertilisers used. This method of sludge disposal represents a sustainable and eco-friendly action; it is welcomed by farmers in the surrounding areas and has been gaining popularity over time, as it has been adopted in many rural areas (taking part and benefiting from the action each year).

 

A thermal drying unit of the dehydrated sludge has been in operation since the end of 2011; now, all sludge is led there, producing a hygienised product with grain sizes of 1-4mm and over 92% dryness. This daily quantity (about 20 tons) is received by companies licensed for its management and further utilisation in final product form as a soil enhancer-fertiliser for application to agricultural crops.

Practical adviceto avoid clogging the sewer

Various things that make their way every day into our home’s sinks, washbasins, toilet bowls, bathroom and balcony gutters lead to clogged drains. The sewage system requires particular attention; some simple things we can do every day can delay the clogging of drains; in addition to saving money for your apartment building and household, this will also help improve the operation of the sewerage network, make the operation of wastewater treatment plants (biological treatment) more efficient and consequently reduce the environmental impact.

For these reasons, avoid throwing the following down your drains:

  1. Papers
    Such as toilet paper, tissues and napkins, which are the most frequent cause of clogged drains. Even in the case of things like biodegradable toilet paper, it is best to throw such materials in bins and not in the toilet bowl.
  2. Hair – Soaps
    Such items, which end up down the drain when you are washing your body, can also cause serious problems in the sewage system as balls of hair and soap with water stick to the piping and accumulate there, gradually leading to the clogging of the drains. To avoid or at least limit this problem, use cheap plastic or metal catchers, which you can easily find on the market. These catchers catch the hair, which can then be collected with the aid of paper and discarded in the bin.
  3. Food waste – edible fats and oils and frying oils
    Such materials, which mainly block sink drains, stick to the drain walls and also tend to accumulate, like materials in Category 2. It is recommended that all food waste, except edible fats and oils, be disposed of in waste bins before you wash the dishes. Edible fats, oils and frying oils can be handled as described here.
  4. Personal hygiene products
    Personal hygiene products include nappies, cotton, Q tips, baby wipes, sanitary towels, tampons, dental floss and adhesive dressings. When the above are thrown down the drain, they expand due to the absorption of water, almost directly clogging the drains. It is recommended that personal hygiene products be thrown in the bin and never in the toilet bowl.
  5. Miscellaneous
    The last category includes a large list of materials that cannot be classified in one of the above categories. Examples include cigarette butts, cosmetics, building or renovation materials (e.g. paints, cement, stucco, rubble, etc.), protective gloves, packaging materials, which should be handled in such a way as to avoid clogging the drains and always with a focus on Environmental Protection.

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