River Rehabilitation Programs & Social Enterprises in Las Piñas City

Solid Waste Management City-wide Practices

Composting Practices

Barangay Bio-digesters
To complement the regular collection efforts of the City’s garbage trucks, “bio-men” conduct a door-to-door collection of the household wet garbage.The “bio-men” are part-time workers under the barangay payroll.

The wet garbage collected would pass through a mechanical presser present in every composting facility. The wet garbage wouldbe pressed to remove the liquid content or the leachate.

The leachate then enters an enclosed container. In this container further anaerobic digestion occurs. From the bacteria, methane is produced which is the source of bio-gas.

Besides the kitchen wastes of the households, coco peat is added into the compost mix.

A composting machine is able to produce 1,000 kilos or one (1) ton of compost per month. Today, there are a total of forty seven (47) rotary composters operating in twenty nine (29) composting centers, providing livelihood to 141 families.

Presently, the total average compost output of Las Piñas is forty seven (47) tons per month. The goal is to have a total of 100 composting centers spread throughout the city by 2013.

Part of this compost is used for the re-greening and tree-planting program in Las Piñas.

Farmers from nearby provinces purchase the rest of the compost to produce organic vegetables in their provincial farms. The income derived from the sale of the compost reverts back to the barangay and the subdivision housing associations to support their environmental activities.

Use of Vermiculture
Another type of waste in the city is garden waste such as yard trimmings, dead branches, and plants. These are collected separately and brought to the vermi composting facilities.Vermi composting is the process of using worms to process organic waste into nutrient-rich soil. The production of organic fertilizer through vermi composting is now carried out in eleven (11) centers in eleven (11) barangays, with a total monthly production of 5,500 kilos or 6.1 tons

Barangay Recycling Day
A monthly Barangay Recycling Day was initiated in August 2010 by newly-elected congressman Mark Villar. The event is like a trade fair but instead of having booths where products are sold, owners and operators of MRS or junk yards buy recyclables such as old newspapers and magazines, plastic bottles, and empty tin cans from the homeowners.

This project has further reduced the volume of garbage that the city government has to collect.

Transforming Non -biodegradables into construction materials The materials that remain after the process of waste treatment – like agricultural, urban, industrial or mining – are called residual waste. In the domestic setting, residual waste pertains to household trash that cannot be recycled, re-used, or composted.

Residual waste in Las Piñas is used in the manufacture of construction materials such as hollow blocks and pavers. The non-biodegradables and non-recyclables are collected and processed through a pulverizing machine, which produces pellets that are mixed with cement. This mixture is molded into the desired shapes of blocks and pavers.

These City-wide practices in solid waste management have helped to simultaneously achieve multiple objectives :

    1. Reduction of domestic waste thrown in the river;
    2. Provision of organic fertilizer to their city-wide tree planting program;
    3. Savings on garbage collection costs of the city government;
    4. Creation of additional livelihood opportunities for the poor;
    5. Better environmental consciousness among the Las Piñeros;
    6. Mobilization of social organizations;
    7. Increase of total organic fertilizer supply to organic farmers.

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