biogas example doo annual report - undp

ANNUAL REPORT FOR THE MINISTRY OF MINING AND ENERGY OF THE REPUBLIC OF SERBIA FOR THE YEAR 2016

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BIOGAS EXAMPLE DOO

ANNUAL REPORT

to the MINISTRY OF MINING AND ENERGY OF THE REPUBLIC OF SERBIA FOR THE YEAR 2016

NAME OF PLANT:

BGE EXAMPLE 2016 – PRIMERGRAD, GORNJE PRIMERJE

28 February 2017


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PLANT OPERATION REPORT BGE EXAMPLE 2016 – PRIMERGRAD, GORNJE PRIMERJE

Year: 2016

Petar Primerac, Director


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SADRŽAJ:


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Contents:

1. SUMMARY ............................................................................................................................ 6

2. SYSTEM DESCRIPTION ........................................................................................................... 7

3. PARAMETERS ............................................................................. Error! Bookmark not defined.

4. FINAL ENERGY CALCULATION .............................................................................................. 13

5. FUEL CONSUMPTION CALCULATION ................................................................................... 14

6. MONTHLY SUBSTRATE CALCULATION ................................................................................. 16

7. SUBSTRATE STOCKS ............................................................................................................ 18

Appendix 1 - Tests and laboratory results ........................................................................ 20

Appendix 2 - Report on measurement of energy generation and consumption ............. 21

Appendix 3 - Evidence of fuel and substrate consumption .............................................. 22


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1. SUMMARY According to the Decree on requirements and procedures for acquiring the status of privileged producer of electricity, temporary privileged producer, and producer of energy from renewable sources („The Official Gazette of RS“ No. 56/2016), Article 27, para 1, item 9), BIOGAS EXAMPLE DOO is hereby submitting its Annual Report for the year 2016 (hereinafter: the Report) regarding the operation of the plant BGE EXAMPLE 2016 – PRIMERGRAD, GORNJE PRIMERJE (hereinafter: the Plant).

The Plant started operation in the status of privileged producer of electricity as of the date of the first reading of the meter on 1 July 2016. The Decision granting the status of privileged producer of electricity was issued for the plant of installed capacity of 200 kW, and the Plant was registered as a Biogas Plant.

Data code Total data for the reporting year Measuring

unit

Value

A Electricity delivered to the system kWh 705.000

E Total produced thermal energy kWh 67.000

F Total produced final energy kWh 772.000

D Electricity taken over from the grid for production purposes kWh 39.000

G Ratio of taken over electricity and electricity delivered to the system % 5,5%

J1 Energy value of used primary fuel kWh 2.282.375

K Total energy value of consumed fuel kWh 2.282.375

L Share of energy value of used primary fuel in total energy value of consumed fuel % 100,0%

Q Total annual rate of efficiency % 33,8%

For biogas plants only

S1 Total entered quantity of dry matter from corn silage t -

T Total entered quantity of dry matter from all substrate t 1.432,1

L Share of corn silage in the annual mass balance of substrate dry matter % 0,0%


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2. SYSTEM DESCRIPTION For the purpose of its operation the Plant uses biogas as the basic and only fuel. The designed consumption of the primary fuel annually is 1,000,000 Nm3. For the purposes of producing electricity and thermal energy use is made of the CHP unit type EXAMPLE-CHP2016, of nominal generator power 250 kVA. In case of accident the plant has a possibility to transport the produced biogas to the torch for burning. The consumed fuel is measured in measuring points marked in the diagram (Figure 2) as MBG1 and MBG2, by means of measuring instruments type EXAMPLE-GASMESURE2016, of accuracy 0.5 %.

Own consumption of electricity by the plant (for operation purposes) includes the generator start up circuit, two pumps for substrate pumping of nominal power 3 kVA each, two substrate mixers of 3 kVA each, extruder of 3 kVA, compressor of 3 kVA and other smaller consumers such as the control system, circular pumps, regulation valves and the like, of total installed power less than 10 kW. The total own consumption, except the generator start-up, is provided from the grid via a separate measuring point. The general consumption which includes lighting, supply for the management building and garage for operational vehicles is provided from the grid via a separate connection and measuring point, so that data for this consumption is not presented in this Report. Measurement of produced electricity is performed at the measuring point marked in the diagram (Figure 3) as MEE1, with measuring instruments which are an integral part of the management system and have no commercial function, but are important only from the point of view of internal system control. Measurement of electricity taken over from the grid is performed at the measuring point marked in the diagram (Figure 3) as MEE2 by equipment which is procured and installed according to requirements for design and connection, and valid standards and regulations for connection of the plant to the grid.

Produced thermal energy is used partly for own needs, and partly is sold to the nearby farm from which manure is procured. Excess thermal energy is transferred to the external heat exchanger units. Measurement of thermal energy is performed at the measuring point marked in the diagram (Figure 3) as MTE1, type PRIMER-KALRM2016.

The Plant is operating in the vicinity of the biogas plant BGE EXAMPLE 2014, with identical characteristics as BGE PRIMER 2016. With the said nearby plant there is a joint silo of silage, but full recording of storing and input of silage is completely separate for each plant. Also, both plants use the same lagoon and they both deliver the thermal energy to the same buyer via separate measuring points. All other installations are completely separate and there is no exchange of materials or energy between the plants. Delineation between the plants is presented in the diagram (Figure 3) with the thick interrupted line.

Biogas is produced in a total of 2 digesters of total working volume 2,500 m3, and the designed share of substrate dry matter in digesters is within the limits of 13 %. The plant is designed to use the following substrates: 4400 t sorghum, 1600 t cattle manure, 1600 t poultry manure, and 1500 t corn and straw. Of that, it is planned to store sorghum, corn and straw in silos for a period of one to maximum two years; and for manure up to several days, and this only in cases of average or plant reconstruction. Also, due to moisture loss there is loss of mass of fresh matter up to 15 % of sorghum silage during one year, while data for other substrates are not available. Both forms of manure are used in regular operating regime without storing with holding periods of maximum several days. Entry of substrate is measured via the weighing scale presented in the diagram (Figure 2) marked as MSvM1.

The plant procures from its own production the silage substrates, specifically sorghum, corn and straw. The plant procures in the market cattle and poultry manure, from the chicken farm, two smaller fattening calves’ farms, and individual cattle breeders from the two neighbouring villages.


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Tests of energy sources (biogas) and substrate were performed for all types of substrates used at the beginning of 2016 before the plant was commissioned into trial run.

The trial run lasted for less than a month, so that data for that period are covered by this Report. The digester working temperature is 35°C. For the purpose of heating the digestate the plant uses its own generation of thermal energy in the CHP plant.

In the period from 3 – 12 November 2016, due to an average on the middle voltage network, the Plant could not deliver electricity, and during this period the entry of substrate was at the minimum necessary value to maintain the technological process, and the produced biogas was burnt in the chimney during that period.


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3. PARAMETERS Parameters for physical characteristics of used substrates and biogas are taken from the results of testing as presented in Appendix 1.

Fuel (**) Unit for quantity (unit)

Upper calorific value

[MJ/unit]

Lower calorific value

[kWh/unit]

Biogas 55% methane Nm3 18,73 5,20

Biogas 64% methane Nm3 22,04 6,12

Wood biomass kg of dry matter 18,50 5,14

Communal waste kg of dry matter 18,60 5,17

Methane Nm3 35,80 9,94

EXAMPLE: Biogas 56% methane - analysis Nm3 19,22 5,34

Natural gas Nm3 34,43 9,56

Sugar beet pulp kg of dry matter 17,90 4,97

Grass kg of dry matter 18,60 5,17

Substrate Share of dry matter in

substrate [%]

Biogas yield [Nm3/t of dry

matter]

Corn silage (*) 32,0 627

Solid cattle manure 25,0 240

Swill 20,0 595

EXAMPLE: Corn biomass and straw 86,0 349

EXAMPLE: Sorghum silage 33,0 330

EXAMPLE: Cattle manure 8,5 235

EXAMPLE: Poultry manure 15,0 333 Sugar beat 12,0 294 Pig manure 4,5 256

Grass (fresh) 18,0 405

Grass silage 25,0 468


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4. CALCULATION OF FINAL ENERGY

Item Period that

the data refers to

Measuring reading

date

Electricity delivered to the grid

[kWh]

Thermal energy sold to buyer [kWh]

Thermal energy

used for own needs

[kWh]

Electricity taken over from the

grid for production

purposes (*) [kWh]

1 July 1.8.2016. 120.000 5.000 0 5.000

2 August 1.9.2016. 130.000 5.000 0 6.000

3 September 1.10.2016. 135.000 10.000 0 5.500

4 October 1.11.2016. 135.000 15.000 0 6.000

5 November 1.12.2016. 48.000 7.000 0 8.000

6 December 1.1.2017. 137.000 25.000 0 8.500

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A B C D

Total primary energy [kWh] 705.000 67.000 - 39.000

Total produced thermal energy [kWh] E = B + C

67.000

Total produced final energy [kWh]

F = A + B + C

772.000

Ratio of electricity taken over from the grid and energy delivered to the grid [%]

G = (D/A) * 100% 5,53%


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5. CALCULATION OF FUEL CONSUMPTION

Fuel (*)

Primary fuel Additional fuel

EXAMPLE: Biogas 56% methane – analysis

Unit of measurement for quantity (unit) Nm3 -

Item Period to which data refer Quantity of utilized fuel

[unit]

Quantity of utilized fuel [unit]

1 7.2016. 68.000 2 8.2016. 73.500 3 9.2016. 85.000 4 10.2016. 86.000 5 11.2016. 27.000 6 12.2016. 88.000 7


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H1 H2

Total quantity of utilized fuel [unit] Hi 427.500 -

I1 I2

Lower calorific value [kWh/unit] (**) Ii 5,34 -

J1 J2

Energy value of utilized fuel [kWh] Ji = Hi * Ii 2.282.375 -

Total energy value of utilized fuel [kWh] K = ΣJi 2.282.375

Share of energy value of utilized primary fuel in total energy value of utilized fuel [%]

L = (J1/K) * 100% 100,0%

Total annual degree of efficiency [%]

Q = (F/K) * 100% 33,8%


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6. MASS CALCULATION OF SUBSTRATE Due to different methodology of measurement, calculation, and internal record keeping of utilized substrate, the entry of substrate is presented separately for each type for the overall calculation period.

j 1 2 3 4 5

Substrate Corn silage (*)

PRIMER Sorghum

silage

PRIMER Cattle

manure

PRIMER Poultry manure

PRIMER Corn and straw

Item Period to

which data refer

Quantity of fresh

substrate matter entered

into digester

[t]

Quantity of fresh


into digester

[t]

Quantity of fresh


into digester

[t]

Quantity of fresh


into digester

[t]

Quantity of fresh

substrate matter

entered into digester

[t]

1 7.2016. 361 130 125

2 8.2016. 360 132 125

3 9.2016. 360 120 120

4 10.2016. 370 145 125

5 11.2016. 180 150 60

6 12.2016. 371 133 125

7 1.7.2016. - 1.9.2016. 250

8 1.9.2016. - 1.11.2016. 270

9 1.11.2016. - 1.1.2017. 265


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M1 M2 M3 M4 M5

Total quantity entered by substrates [t]

Mj - 2.002 810 785 680

N1 N2 N3 N4 N5

Share of dry matter in the fresh matter by substrates [%]

Nj 32,00 33,00 8,50 15,00 86,00

S1 S2 S3 S4 S5

Total entered quantity of dry matter by substrates [t]

Sj = Mj*Nj /100

- 661 69 118 585

Total entered quantity of dry matter [t] T = ΣSj 1.432,06

Share of corn silage in the annual mass balance of substrate dry matter [%]

L = (S1/T) *

100% 0,0%


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7. SUBSTRATE STOCKS Assessment of the status of silos was done a few days outside the reporting period, specifically on 20 June 2016 and 20 December 2016. From these values the relevant quantity of silage was subtracted representing the consumption of silage from the date of assessment to the limiting date of the reporting period.

J 1 2 3 4 5

Substrate Corn silage (*)

EXAMPLE Sorghum

silage

EXAMPLE Cattle

manure

EXAMPLE Poultry manure

EXAMPLE Corn and

straw

Quantity of dry matter

in substrate

[t]

Quantity of dry

matter in substrate

[t]

Quantity of dry

matter in substrate

[t]

Quantity of dry

matter in substrate

[t]

Quantity of dry matter in

substrate [t]

V1 V2 V3 V4 V5

Status of stocks at the beginning of the reporting period

3.300 100

Period/date to which the data

refer

Entry of dry matter

in the stocks

[t]

Entry of dry matter

in the stocks

[t]

Entry of dry matter

in the stocks

[t]

Entry of dry matter

in the stocks

[t]

Entry of dry matter in the

stocks [t]

7.2016. 4.000

9.2016. 1.600


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U1 U2 U3 U4 U5

Total quantity of substrate dry matter

entered to stocks [t]

Uj - 4.000 - - 1.600

Item Period/date to

which data refers

Taking out dry matter from

stocks [t]


stocks [t]


stocks [t]


stocks [t]


stocks [t]

1 7.2016. 361 125

2 8.2016. 360 125

3 9.2016. 360 120

4 10.2016. 370 125

5 11.2016. 180 60

6 12.2016. 371 125


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Appendix 1 - Tests and laboratory results


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Appendix 2 - Report on measurement of energy generation and consumption


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Appendix 3 - Evidence of fuel and substrate consumption

biogas example doo annual report - undp

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