Revision as of 15:58, 24 March 2011

This guide to planning is intended to serve agricultural extension officers as a comprehensive tool for arriving at decisions concerning the suitability of locations for family-sized biogas plants. The detailed planning outline has a data column for entering the gathered information and a rating column for noting the results of evaluation.

Evaluation criteria are:

+ Siting condition are favorable
o Siting condition are unfavorable, but: a) compensable by project activities; b) not serious enough to cause ultimate failure
- Siting condition are not satisfactory

Despite its detailed nature, this planning guide is only a framework within which the extension officer should proceed to conduct a careful investigation and give due consideration, however subjectively, to the individual conditions in order to arrive at a locally practical solution. By no means is this planning guide intended to relieve the agricultural extension officer of the responsibility to thoroughly familiarize himself with the on-the-spot situation and to judge the overall value of a given location on the basis of the knowledge thus gained.

1 Initial situation
2 Natural / Agricultural conditions
3 Balancing the energy demand with the biogas production
4 Plant Design and Construction
5 Plant operation / maintenance / repair
6 Economic analysis
7 Social acceptance and potential for dissemination
8 Summarization
- 8.1 Siting conditions
- 8.2 Overall rating of siting conditions

Initial situation

Data

Rating

Addresses/project characterization

Plant acronym:
Address of operator/customer:
Place/region/country:
Indigenous proj. org./executing org.:
Extension officer/advisor:

General user data

Household structure and number of persons:
User's economic situation:
Crops: types, areas, manner of cultivation:
Non-agricultural activity:
Household/farm income:
Cultural and social characteristics of user:

Problems leading to the "biogas approach"

Energy-supply bottlenecks:
Workload for prior source of energy:
Poor soil structure/yields:
Erosion/deforestation:
Poor hygiene and other factors:

Objectives of the measure "biogas plant"

User interests:
Project interests:
Other interests:

Natural / Agricultural conditions

	Data	Rating
Natural conditions Mean annual temperature: Seasonal fluctuations: Diurnal variation: Rating:		- o +
Subsoil Type of soil: Groundwater table, potable water catchment area: Rating:		- o +
Water conditions Climatic zone: Annual precipitation: Dry season (months): Distance to source of water: Rating:		- o +
Livestock inventory (useful for biogas production) Animals: kind and quantity: Type of stable: Use of dung: Persons responsible for animals: Rating:		- o +
Vegetable waste (useful for biogas production) Types and quantities: Prior use: Rating:		- o +
Fertilization Customary types and quantities of fertilizer/areas fertilized: Organic fertilizer familiar/in use: Rating:		- o +
Potential sites for biogas plant Combined stable/biogas plant possible: Distance between biogas plant and livestock stable: Distance between biogas plant and place of gas consumption: Rating:		- o +
Overall rating 1		- o +

Balancing the energy demand with the biogas production

Data

Rating

Prior energy supply

Uses, source of energy, consumption:

Anticipated biogas demand (kwh/day or l/d): for cooking:; for lighting:; for cooling:; for engines:
Total gas demand: a) percentage that must be provided by the biogas plant:; b) desired demand coverage:

Available biomass (kg/d) and potential gas production (l/d)

from animal husbandry: pigs:; poultry:; cattle:
Night soil
Vegetable waste (quantities and potential gas yield): 1.; 2.
Totals: biomass and potential gas production; a) easy to procure:; b) less easy to procure:

Balancing

Gas production clearly greater than gas demand
-> positive rating (+)

Gas demand larger than gas production
-> negative rating (-); but review of results in order regarding:

a) possible reduction of gas demand by the following measures
->

b) possible increase in biogas production by the following measures
->

If the measures take hold:
-> qualified positive rating for the plant location (o)

If the measures do not take hold:
-> site rating remains negative (-)

Overall rating 2

- o +

Plant Design and Construction

Data

Rating

Selection of plant design

Locally customary type of plant:
Arguments in favor of floating-drum plant:
Arguments in favor of fixe-dome plant:
Arguments in favor of other plant(s):

Type of plant chosen:

Selection of site

Availability of building materials

Bricks/blocks/stone:
Cement:
Metal:
Sand:
Piping/fittings:
Miscellaneous:

Availability of gas appliances

Cookers:
Lamps:
...
...

Overall rating 3

- o +

Plant operation / maintenance / repair

	Data	Rating
Assessment of plant operation Incidental work: Work expenditure in h: Persons responsible: Rating with regard to anticipated implementation:		- o +
Plant maintenance Maintenance-intensive components: Maintenance work by user: Maintenance work by external assistance: Rating with regard too anticipated implementation:		- o +
Plant repair Components liable to need repair: Repairs that can be made by the user: Repairs requiring external assistance: Requisite materials and spare parts: Rating with regard to expected repair services:		- o +
Overall rating 4		- o +

Economic analysis

	Data	Rating
Time-expenditure accounting Time saved with biogas plant Time lost due to biogas plant Rating:		- o +
Microeconomic analysis Initial investment: Cost of operation/maintenance/repair: Return on investment: energy, fertilizer, otherwise: Payback time (static): Productiveness (static): Rating:		- o +
Quality factors, useful socioeconomic effects and costs Useful effects: hygiene, autonomous energy, better lighting, better working conditions, prestige: Drawbacks: need to handle night soil, negative social impact: Rating:		- o +
Overall rating 5		- o +

Social acceptance and potential for dissemination

	Data	Rating
Anticipated acceptance Participation in planning and construction Integration into agricultural setting: Integration into household: Sociocultural acceptance: Rating:		- o +
Establishing a dissemination strategy Conditions for and chances of the professional-craftsman approach: Conditions for and chances of the self-help oriented approach:		- o + - o +
General conditions for dissemination Project-executing organization and its staffing: orgnaizational structure: interest and prior experience in biogas technology: Regional infrastructure for transportation: communication: material procurement: Craftsman involvement, i.e. which acitivities: minimum qualifications: tools and machines: Training for engineers, craftsman and users: Proprietary capital, subsidy/credit requirement on the part of user: craftsmen: Rating:		- o +
Overall rating 6		- o +

Summarization

Siting conditions

	No.	Rating
Natural/agricultural conditions	1.	- o +
Balancing the energy demand and the biogas production	2.	- o +
Plant design and construction	3.	- o +
Plant operation/maintenance/repair	4.	- o +
Economic analysis	5.	- o +
Social acceptance and potential for dissemination	6.	- o +

Overall rating of siting conditions

- o +

Back to "Biogas Portal"

.

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 Despite its detailed nature, this planning guide is only a framework within which the extension officer should proceed to conduct a careful investigation and give due consideration, however subjectively, to the individual conditions in order to arrive at a locally practical solution. By no means is this planning guide intended to relieve the agricultural extension officer of the responsibility to thoroughly familiarize himself with the on-the-spot situation and to judge the overall value of a given location on the basis of the knowledge thus gained.
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-= Detailed planning guide for biogas plants  =
+= Initial situation  =
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-== Initial situation  ==
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-== Plant Design and Construction  ==
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+= Plant operation / maintenance / repair  =
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-== Summarization  ==
+= Summarization  =
 ==== Siting conditions  ====

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Planning Guide for Biogas Plants

Revision as of 15:58, 24 March 2011

Contents

Initial situation

Natural / Agricultural conditions

Balancing the energy demand with the biogas production

Plant Design and Construction

Plant operation / maintenance / repair

Economic analysis

Social acceptance and potential for dissemination

Summarization

Siting conditions

Overall rating of siting conditions

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Planning Guide for Biogas Plants

Revision as of 15:58, 24 March 2011

Contents

Initial situation

Natural / Agricultural conditions

Balancing the energy demand with the biogas production

Plant Design and Construction

Plant operation / maintenance / repair

Economic analysis

Social acceptance and potential for dissemination

Summarization

Siting conditions

Overall rating of siting conditions