Green waste is biodegradable waste

Biodegradable waste

Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms. Waste that cannot be broken down by other living organisms are called non-biodegradable....

 that can be composed of garden

Garden

A garden is a planned space, usually outdoors, set aside for the display, cultivation, and enjoyment of plants and other forms of nature. The garden can incorporate both natural and man-made materials. The most common form today is known as a residential garden, but the term garden has...

 or park

Park

A park is a protected area, in its natural or semi-natural state, or planted, and set aside for human recreation and enjoyment, or for the protection of wildlife or natural habitats. It may consist of rocks, soil, water, flora and fauna and grass areas. Many parks are legally protected by...

 waste, such as grass

Grass

Grasses, or more technically graminoids, are monocotyledonous, usually herbaceous plants with narrow leaves growing from the base. They include the "true grasses", of the Poaceae family, as well as the sedges and the rushes . The true grasses include cereals, bamboo and the grasses of lawns ...

 or flower

Flower

A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants . The biological function of a flower is to effect reproduction, usually by providing a mechanism for the union of sperm with eggs...

 cuttings and hedge trimmings, as well as domestic and commercial food waste

Food waste

Food waste or food loss is food that is discarded or lost uneaten. As of 2011, 1.3 billion tons of food, about one third of the global food production, are lost or wasted annually. Loss and wastage occurs on all steps in the food supply chain...

. The differentiation green identifies it as high in nitrogen

Nitrogen

Nitrogen is a chemical element that has the symbol N, atomic number of 7 and atomic mass 14.00674 u. Elemental nitrogen is a colorless, odorless, tasteless, and mostly inert diatomic gas at standard conditions, constituting 78.08% by volume of Earth's atmosphere...

, as opposed to brown waste

Brown waste

Brown Waste is any biodegradable waste that is predominantly carbon based. The term includes such items as dry leaves, twigs, hay, paper, sawdust, corn cobs, cardboard, pine needles or cones, etc....

, which is primarily carbon

Carbon

Carbon is the chemical element with symbol C and atomic number 6. As a member of group 14 on the periodic table, it is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds...

aceous.

Green waste is often collected in municipal curbside collection schemes or through private waste management

Waste management

Waste management is the collection, transport, processing or disposal,managing and monitoring of waste materials. The term usually relates to materials produced by human activity, and the process is generally undertaken to reduce their effect on health, the environment or aesthetics...

 contractor businesses and subject to independent audit.

Biodegradable

The word "compost" it simply means the decomposition of biodegradable materials. In agriculture,particularly organic farming, farmers utilize their green waste for composting whereby they use as manure for their crop.There are different types of composting, which includes aerobic composting, vermi-compost and heap compost.In Bhutan most of the farmers prefer heap compost which doesn't cost much for the preparation as it can be easily made with locally available material.However with the increase of the population, the generation of waste had been very high and there is high risk of pollution and harmful effect to human being and environment.Therefore in order to utilize the agriculture waste, National Organic program had started a project with collaboration with Thimphu city corporation to utilize the green waste generated from centenary farmer's market.The management of the waste from the new Centennial Farmers’ Market has been an essential component of the Market facilities utilization for the MOA and Thimphu City Corporation. It is clear that the management of waste from the city is a problem that all should be concerned about and TCC alone cannot solve the problem. All citizens could help by being a little more caring and responsible in their disposal of wastes. However, the limitation of the TCC facilities in collection of wastes from various locations and appropriate management of the collected waste is a constraint in efficient collection and proper disposal. Due to these difficulties coupled with poor awareness and civic sense of the citizens, TCC’s service although far reaching needs assistance from other fronts.A huge composting facility was constructed with DANIDA funds and completed in 2004, The facilities include a shed for sorting of wastes which is connected to a chute to pass the waste to the composting structure where a shredder is located at the entrance which leads to composting cubicles which are equipped with aeration facilities with blowers. A control room has the engines that control the operations such as sensing temperatures.The National Organic Programme of DOA, MOA and Thimphu City Corporation made the first heap of compost from the fruit and vegetable wastes collected from the Centennial Farmers’ Market in an effort to take responsibility of the waste generated from agriculture.

On the 25th May, 09 an awareness programme was conducted by the NOP for over 150 vendors and retailers at the CFM while awareness infomercial was aired on BBS and banners hung around the market to remind buyers and sellers alike to share in the waste segregation by sorting at source. Separate stickers for fruit and vegetable wastes, and for plastics and others were provided to be stuck on each bin all provided by MOA through DNRM project.

With the TCC’s help in collection and transport of the biodegradable wastes to the composting site at Serbithang, National Organic Programme started making compost heaps which will be now carried out continuously to manage all the fruit and vegetable wastes generated from the CFM. The techniques used here is the low tech aerobic composting that seals in the heat and moisture and prevents foul odour around the heap.
The compost is ready to be sold in the market and it is looked after by the TCC.

Biofuels

Biogas

Biogas

Biogas typically refers to a gas produced by the biological breakdown of organic matter in the absence of oxygen. Organic waste such as dead plant and animal material, animal dung, and kitchen waste can be converted into a gaseous fuel called biogas...

 captured from biodegrable green waste can be use as biofuel

Biofuel

Biofuel is a type of fuel whose energy is derived from biological carbon fixation. Biofuels include fuels derived from biomass conversion, as well as solid biomass, liquid fuels and various biogases...

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Also green waste can be used as non food crop to produce cellulosic ethanol

Cellulosic ethanol

Cellulosic ethanol is a biofuel produced from wood, grasses, or the non-edible parts of plants.It is a type of biofuel produced from lignocellulose, a structural material that comprises much of the mass of plants. Lignocellulose is composed mainly of cellulose, hemicellulose and lignin...

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