Value of bioslurrySteven von Eije, Energy AnalystEDIaal Green Gas

Content of presentation

• Background• Research

Design• Results• Implications

Background

• Invitation from SNV to investigate the value of bioslurry

• Tea producers (good records of production and expenditures)

• Thai Nguyen Province in Vietnam

Research questions

• Effect of bioslurry on tea production• Effect of bioslurry use on household

income

Approach

• Personal interviews (questionnaire and translator)

• 100 households• No control group (large wealth

difference) (“There is no actual demand for biogas installations, everyone who

can afford one, has one because it’s a great product.”)

• Historical and current data used

Effect on tea production

• Amount of tea produced per sao• Price per kg processed tea

• Data used in income calculation

Effect of bioslurry use on household income

• Change in production quantity?• Change in price for tea?• Change in amount of pesticide use?• Change in amount of chemical

fertilizer use?

Summer Winter0.002.004.006.008.00

10.0012.0014.0016.0018.0020.00

17.27

10.86

14.86

9.27

Difference in yield before and after bioslurry use

with bioslurry without bioslurry

Kil

og

ram

s p

er

sa

o p

er

ha

rve

st

Price per kg processed tea

€ 0,00

€ 0,50

€ 1,00

€ 1,50

€ 2,00

€ 2,50

€ 3,00

€ 3,50

Summer Winter

Current price

Previous price

Chemical fertilizer and pesticide savings

€ 134

€ 51

€ 239

€ 77

€ 105

€ 27

€ 132

€ -

€ 50

€ 100

€ 150

€ 200

€ 250

€ 300

Yearly chemical fertilizer expenditures yearly pesticide expenditures

Current

Previous

Savings

Total savings

Annual income effect in comparison to biogas installation costs

Income generation Income savings Income effect Average cost of the biogas installation

€ 0.0

€ 50.0

€ 100.0

€ 150.0

€ 200.0

€ 250.0

€ 300.0

€ 350.0

187.57545 187.57545

€ 131.6

€ 131.6

308.27855

Questions?