Under Population Women Environment Development Organization (PWEDO)
BACKGROUND
Kathmandu Valley has five of the 58 municipalities in the country and is home to about 30% of the total urban population. The city of Kathmandu is by far the largest city in the country, with more than 20% of the total urban population. The population of the three districts of Kathmandu Valley increased from 1,107,370 in 1991 to 1,647,092 in 2001. The annual population growth rate in Kathmandu district was 4.71%. The population of Kathmandu district was 1,081,845 in 2001 (4.7% of Nepal’s population). The urban population density of Kathmandu Valley is 10,265 (the population is 995,966 and the area 97 sq.km). On the other hand, the rural population is also increasing slowly in the valley. The average annual growth of the rural population is comparatively higher than for Nepal as a whole. If present growth continues, the population of the valley in 2020 will reach 2.5 million.
This vast growing population of Kathmandu has led many problems. One of the major problem associated with the rapid increasing population is in “Waste Management”. Solid waste management (SWM) services have consistently failed to keep up with the vast amount of solid waste produced in urban areas. There is not currently an efficient system in place for the management, storage, collection, and transportation of solid waste. Kathmandu City, an important urban center of South Asia, is no exception. In Kathmandu Metropolitan City, solid waste generation is predicted to be 1091 m3/d (245 tons/day) and 1155 m3/d (260 tons/day) for the years 2005 and 2006, respectively. The majority (89%) of households in Kathmandu Metropolitan City are willing to segregate the organic and non-organic portions of their waste. [1]
The organic type of waste can be effectively managed by utilizing it to produce biogas. The biogas can be an excellent alternative to the LPG which is associated with high cost and scarcity (sometimes). A simple type of biogas plant can be established in the household with a low initial cost and utilizing the wastes material generated in the same household.
PROBLEM DEFINATION
• Wastes generated in Kathmandu are not managed or utilized effectively even if they have potential for extracting energy.
• Petroleum products as fuel are expensive.
• No simple technology seen in the urban areas to generate biogas from organic household wastes.
RATIONALE
• Organic wastes produced in the household level can be effectively utilized.
• The biogas produced can be an excellent alternative (if not supplement) to the LPG.
• The biogas plant can be constructed with a low initial cost.
METHODOLOGY
1. Collection of Ideas from different sources: The ideas are collected from different documentaries, experts in this field and different websites.
2. Collection of fund from different sources: This will be achieved by submitting the proposals to different organizations working in the energy sector.
3. Design and fabrication of the biogas plant: The design will be based on the documentary of Appropriate Rural Energy Technology (ARTI), India. The fabrication will be done according to the design.
4. Installation and testing of the plant: The plant will be installed at the premises of “Population Women Environment Development Organization (PWEDO)”, Tahachal. The testing period of the plant will depend on the season. (4-5 days in summer, 25-30 days in winter)
5. Cost analysis of the biogas plant: This will be done using the various ideas from economics.
COST ESTIMATION
PARTICULARS RATE (NRs) COST(NRs)
1000ltr plastic tank (1 piece) 10,500/- 10,500/-
750ltr plastic tank (1 piece) 8,900/- 8,900/-
90 mm PVC T piece (1 piece) 510/- 510/-
90mm female adapter (1 piece) 400/- 400/-
90mm male adapter (2 piece) 288/- 576/-
90 mm end cap, threaded (1 piece) 400/- 400/-
90 mm rigid PVC pipe (1 piece) 800/- 800/-
63 mm PVC elbow (1 piece) 70/- 70/-
63 mm male adapter (2 piece) 150/- 300/-
63 mm check nut (1 piece) 35/- 35/-
63 mm rigid PVC pipe (1 piece) 700/- 700/-
12.5 mm male adapter (1 piece) 135/- 135/-
12.5 mm GI elbow (1 piece) 200/- 200/-
Adhesive solution 200/- 200/-
Bio-gas stove (1 piece) 800/- 800/-
Gas cock (Brass) (1 piece) 250/- 250/-
Rubber Washers (4 piece) 20/- 80/-
15 mm Ball Valve (1 piece) 800/- 800/-
90 mm, 63 mm, 15 mm, 12.5 mm barrel piece (1 piece each) 210/- 210/-
Labor cost 1800/- 1800/-
Tool cost 1500/- 1000/-
Miscellaneous 1500/- 1500/-
Total (included tax of 13% to materials) 33,528.58/- (thirty three thousand five hundred twenty eight and fifty eight paisa only.)
REFRENCES
.
1. R. Alam, M.A.I. Chowdhurya, G.M.J. Hasana, B. Karanjita and L.R. Shrestha (2007). Generation, storage, collection and transportation of municipal solid waste – A case study in the city of Kathmandu, capital of Nepal. Elsevier Ltd
2. Design concept based on the documentary of Appropriate Rural Technology Institute (ARTI), India