Financial Analyses of Biogas to Bio CNG
projects in India; Projections based case study analyses
Dhawal Parate
Green Brick Eco Solutions, New Delhi
Introduction
India is the fourth
largest energy consumer[1] in the world, after the
United States, China, and Russia. Despite a slowing
global economy, India’s energy demand continues to rise. As vehicle ownership
expands, petroleum demand in the transport sector is expected to grow in the coming
years. While India’s domestic energy resource base is substantial, the country
relies on imports for a considerable amount of its energy use.
According to the International Energy
Agency (IEA), hydrocarbons account for the majority of India’s energy use.
Together, coal and oil represent about two-thirds of total energy use. Natural gas
now accounts for a seven percent share, which is expected to grow with the
discovery of new gas deposits.
Fig 1: Total Energy consumption of India[2]
According to Oil and Gas Journal, India had approximately 38 trillion
cubic feet (Tcf) of proven natural gas reserves as of January 2011. EIA
estimates that India produced approximately 1.8 Tcf of natural gas in 2010, a
63 percent increase over 2008 production levels. The bulk of India’s natural
gas production comes from the western offshore regions, especially the Mumbai
High complex, though fields in the Krishna-Godavari (KG) are increasingly
important.
Despite the steady increase in India’s
natural gas production, demand has outstripped supply and the country has been
a net importer of natural gas since 2004. India’s net imports reached an estimated
429 billion cubic feet (Bcf) in 2010.
Potential of Biogas/Bio CNG
As per MNRE data, the total biogas
potential, in terms of electrical Power, is estimated at 1281 MWe. The major industries
generating biogas are Distillery, Sugar, and Starch. These three,
together, account for 3/4th of the total biogas potential of India. The other major industries are Pulp and paper,
Milk processing, Slaughter house, and Poultry.
Bio CNG is the purified form of Biogas
where all the unwanted gases are removed to produce >95% pure methane gas.
Bio CNG is exactly similar to the commercially available natural gas (CV:
~52000 KJ/Kg) in its composition and energy potential. As it is generated from
biomass, it is considered a renewable source of energy and thus, attracts all
the commercial benefits applicable to other renewable sources of energy.
Bio CNG can directly replace every utility
of LPG and CNG in India. It has the potential to be the future of renewable
fuel because of the abundance of biomass in India. Bio CNG production will also
ease the burden of NG/LPG import for India. It is estimated that Bio CNG can
replace 2/3rd of India’s NG import which is currently pegged at 429
billion cubic feet.
Table 1: Cost of Energy of Fuels in India
Fuel
|
Calorific Value (KJ/Kg)
|
Tariff/ Rate/ Cost
|
Cost of Energy (KJ/Rs.)
|
CNG
|
52000
|
Rs. 42/Kg
|
1238
|
Bio CNG
|
52000
|
Rs. 35*/Kg
|
1485
|
LPG (Commercial)
|
46000
|
Rs. 65.7/Kg
|
700
|
Petrol
|
48000
|
Rs. 65.5/Ltr
|
550
|
Diesel
|
44800
|
Rs. 41.3/Ltr
|
900
|
* Based on Cost of Production estimation
Bio CNG production is very cost effective
making it one of the cheapest fuels in India. Commercial LPG is the costliest
fuel and thus, replacement of commercial LPG with Bio CNG makes for a profitable
business model.
Biogas to Energy projects alternatives
Biogas is a mixture of
primarily 2 gases with the composition of 55-60% CH4 and remaining CO2 with
traces of H2S and moisture. Biogas is a fuel gas with a calorific value of ~ 22,000
KJ/Kg. The biogas projects can be broadly classified into 2 categories:
-
Biogas
to Electric Power
-
Biogas
to Bio CNG
In the power project,
biogas is first cleaned of H2S and moisture and is then fed into a power
generating unit for conversion to electricity. There is no need to remove CO2,
but removal of H2S becomes important due to the corrosive nature of the gas. In
the case of Bio CNG production, biogas is cleaned of H2S and CO2 to produce 95%
methane gas. The bio CNG produced is then compressed and bottled for
transportation to the utility site.
Biogas based power
generation projects have existed in India for a long time. Most of the biogas
generating industries in India are using this gas for power generation only. The
concept of Bio CNG is fairly new in India. It has started to gain momentum and
it is expected to become a formidable alternative to power generation.
Financial Analyses
Global studies have
conclusively proved the financial superiority of bio CNG projects over the
power generation projects. In some cases, the profitability of Bio CNG has been
shown to be 5 times more. As a matter of convenience, we can do a simple back
of the envelope calculation and validate the same (refer table 2)
Table 2: Biogas equivalency with Power and Bio CNG
Power
|
Bio CNG
|
|
1 cum of Biogas equivalent
|
2.1 KWh
|
0.45 kgs
|
Rate of Sale (Net)
|
Rs 5 / KWh
|
Rs 50/Kg
|
Value
|
Rs 10.5
|
Rs. 22.5
|
* Based on best known industry data
The value of the
product generated from 1 cum of biogas is more than twice for Bio CNG. The
revenue realization in this case is more than double. Even with a slightly
higher operating cost and comparable capital cost, Bio CNG is clearly a more
profitable alternative.
For the sake of this
report, we shall further limit the financial analyses to the case of a Bio CNG
project only.
Project Assumptions
Currently, there are
no large scale bio CNG projects in regular operation in India. A few plants are
under commissioning but it will take a few months before reliable data can be
generated. The unavailability of actual data limits this study to a projections
case. The base case estimations and values have been taken for the financial
analyses in this report.
The sample project is
for an industrial scale plant. It is
assumed that the biogas digesters already exist in the industry. Biogas is
being directly purchased from the industry and hence, the only output from the
project is Bio CNG. Thus, in this assumption, the biogas generation cost is not
included. The capital cost only includes H2S and CO2 scrubber along with HP
compressor (250 bar) and cylinder cascades.
Table 3: Project Assumptions
Details
|
Value
|
Unit
|
Plant Capacity
|
500
|
Cum/hr
|
Project Cost
|
7.64
|
Cr
|
Equity Contribution
|
30
|
%
|
Debt
|
70
|
%
|
Interest
|
12
|
%
|
Net Bio CNG Sale cost
|
40
|
Rs/Kg
|
Cost of Biogas
|
4.8
|
Rs/Cum
|
IDC capitalized
|
Yes
|
|
PLF (stabilization period)
|
80
|
%
|
PLF (Stable)
|
90
|
%
|
Biogas methane content
|
60
|
%
|
Bio CNG methane content
|
95
|
%
|
Power Consumption per hour
|
300
|
KWh
|
Cost of Power
|
5.5
|
Rs/KWh
|
Avg. Transportation distance
|
15
|
Kms
|
Cost of transportation
|
20
|
Rs/Km
|
CER certificates
|
Applicable*
|
* Refer section Emission Reductions
Appropriate
assumptions have been taken to account for the Administrative, Personnel,
contingency, working capital, provision periods, escalations etc.
No Central Finance
Assistance (CFA) has been considered in this financial projection. With the 12th
five year plan yet to be notified, no reliable subsidy value is available for
calculation.
Depreciation
As per Income Tax Act, 1961, Specified Air Pollution
Control Equipments and Water Pollution Control Equipment are eligible for
100% depreciation on the cost of equipment in the 1st year
itself.
Specified Air Pollution Control Equipment are:
-
Electrostatic Precipitation
Systems
-
Felt – filter systems
-
Dust Collector systems;
-
Scrubber counter
current/venture/packed bed/cyclonic scrubbers
-
Ash handling system and
evacuation system
Under the IT act, CNG conversion kits and the scrubber units for gas
purification are eligible for 100% depreciation benefit. The classification of
these equipments as air pollution units has to be scrutinized on case to case basis.
Return on Investment
The bio CNG project
shows a very optimistic financial viability. The investor payback is around 2-3
years. This is understandable as the sale price of Bio CNG can be matched to
commercial LPG prices. The interest on term
loan has been taken at 12% which can be further decreased by taking debt from
organizations such as IREDA. Furthermore, the terms of interest payment are
further relaxed on the loan taken from IREDA making the project viability better.
For eg: IREDA offers a better moratorium period compared to a private banking
institution.
Table 4: Investment IRR values at different exit
Investment IRR
|
Value
|
|
IRR Exit in Year 5 @ Forward EBITDA
2x
|
81.0%
|
|
IRR Exit in Year 6 @ Forward EBITDA
1.5x
|
76.5%
|
|
IRR Exit in Year 9 @ Forward EBITDA
1x
|
74.6%
|
The project shows high
cash flows resulting into faster payback. From table 5, the investor NPV is
high. This has resulted from the 70:30 debt /equity ratio for the project.
Higher debt will result in higher investor returns.
Table 5: NPV and payback values
for project
|
for investor
|
|
Year of
Payback
|
4.0
|
2.0
|
NPV (Lakh)
|
334.5
|
643.81
|
WACC (compounded)
|
15.00%
|
Sensitivity Analyses
A sensitivity
analysis has been conducted to understand the implications of cost fluctuations
on the overall project profitability. This will also provide an insight into
the future bargaining power of different stakeholders of the project.
The highest
sensitivity is for the price of Bio CNG sale and the cost of raw material.
Slight fluctuations in these parameters will have large impact on project
profitability as compared to any other parameter. This essentially means that
these costs have to be effectively controlled in the future. For a Bio CNG project
developer, one of the biggest risks is the cost of raw material which is
controlled by the biogas/biomass producer. The seller can escalate the cost at
will. To mitigate this, the developer should consider involving the seller as
an important stakeholder in the project. The other big risk is
at the buyer end, where the prices of other fuels will govern the sale price of
bio CNG. Conventional wisdom dictates that the cost of other non-renewable
fuels will be on the rise in future and bio CNG will remain profitable. Thus,
only some form of policy intervention, in terms of subsidies on fuel, can put
pressure on pricing for Bio CNG. Investor should also
lay emphasis on fixing long term contract for power purchase for the project,
with periodic review, to mitigate arbitrary fluctuations in power cost
Fig 2: Sensitivity Analysis of Key
parameters
Emission Reductions
Bio CNG project is
eligible for CDM and will get CERs for reducing carbon emission. CDM
calculation methodology for Bio CNG project is available on the website of
UNFCCC. The baseline
emissions of gasoline or LPG are considered to calculate the CER for Bio CNG
project. Depending on the utility of Bio CNG, the CER calculation will vary.
Value of CER generated has not been considered in the financial analyses of
this report. Any CER benefit will further enhance the profitability of a Bio
CNG project. REC is not applicable
for Bio CNG bottling and sale project. It is only applicable for power
generation.
Conclusion
Bio CNG projects are
more financially attractive compared to biogas to power. It is expected that
Bio CNG will become the more preferred alternative in the years to come. Despite
being ineligible for RECs, Bio CNG projects have better viability. Sensitivity analyses
show the critical price points for making this project viable. Any developer
with a sufficient control over the gas and raw material prices will make
substantial profits.Globally as well
there is a lot of interest being shown in Indian Bio CNG projects. Various
global investment firms are looking for strategic tie-ups with the India
project developers and industries. This will lead to lot of fund infusion in
this sector and accelerate the growth rate.
Note: The analysis has been done for a sample base case and as per the
best available industry data. Independent financial analyses still needs to be
done for each project
Dhawal Parate
Green Brick Eco Solutions Pvt. Ltd.