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Ershad Ullah Khan, MScProcess Engineer

TPS Termiska Processer AB

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Arsenic poisoning

Bangladesh is experiencing the largest mass poisoning in human history, because of arsenic in the ground water. Around 80 million Bangladeshis may be affected (WHO)

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Lack of electricity and safe water

80% of the population live in rural areas.Around 70% of them are not connected to the

national grid electricity.

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Decentralised energy

Decentralised systems for the supply of electricity are the most appropriate solutions for rural dwellers.

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The project

This project is a pilot investment in Bangladesh

Livestock and vegetable waste biogas CHP plant integrated with membrane distillation.

The purpose is to make both electricity and clean water from the same bio energy.

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Biogas driven engine and membrane distillation process

Distributed powerSafe drinking water and Fertilizer all from one input which is manure or

vegetable waste.

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Pilot project description

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Biogas engine from JDEC

Small scale electricity productionWell proven technology for small scale CHPBiogas can be used directly in the gas engineHeat of exhaust gas is used for ground water

heatingCommercially availableTechnically and economically feasible

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Membrane distillation technology (MD)

Conventional Membrane distillation

Conventional small-scale technologies could not remove the arsenic sufficiently

Conventional large plants are not feasible for small and rural areas

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Absolutely pure water

Bacteria and virusFertilizers and pesticidesIndustrial chemicalsArsenic

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Representative test results

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Membrane module system

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Proposed pilot project

26 kWe biogas engine 3 membrane distillation modulesElectric efficiency 31% Thermal efficiency 40%Annual electricity generation 197 MWh (540

kWh/d)Annual water production 456,000 litres (1250

l/d) Equipment life 10-20 yrs

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Costs per capita electricity and waterSpecific cost for kWh electricity $ 0.04 (28

öre)Specific cost for per liter water $ 0.015

(11 öre)Total investment cost for digester 6,700.00 (USD)

Operating and maintenance costs for 10 years 6,700.00

Total investment cost for gas engine 32,500.00

Operating and maintenance for 10 years 32,500.00

Total cost for electricity production 78,400.00

Specific cost for per kWh electricity 0.04 $/kWh

Total investment cost for MD facilities 41,500.00

Operating and maintenance for 20 years 93,000.00

Total cost for water production 1,34,500.00

Specific cost for water production 0.015 $/lit

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Organizational chart

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Costs of proposed pilot project

Installation costs $ 80700Operation and maintenance 04 years project

$ 8070Investment costs for different units

MD unit,52% Engine; 40%

Digester; 8%

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Economic viability

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Total budget

Equipment and installation costs (demo plant), $ 84,000

Demo plant operation and maintenance costs, $ 8,070/year for 4 years

Salary (Project leader + Advisor) $ 162,000/year for 4 years

Travel per year $ 4,000 for 4 yearsTotal budget, $ 780,200

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Sensitivity analysisGas engine cost Vs Total Invt.

0

40000

80000

120000

160000

200000

240000

280000

0 15000 30000 45000 60000 75000 90000 105000 120000 135000 150000 165000 180000 195000

Engine cost

Inve

stm

ent

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Sensitivity analysisInvestment Vs module cost

69000

71000

73000

75000

77000

79000

81000

8000 10000 12000 14000 16000 18000 20000

Modules cost

Investm

ent

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Thank you for your attention