Biogas Sanitation

1 Basics of Anaerobic Digestion

14 Topics | 8 Quizzes

1.1 What is anaerobic digestion?

1.2 What is biogas?

1.3 Methane and Contribution to global warming

1.4 Feedstock Materials and Biogas Production

1.4.1 Biodegradability of various feedstock

1.5 Process of anaerobic digestion

1.6 What are the benefits and limitations of anaerobic digestion?

1.7 What are the possible applications for biogas?

1.7.3 Electricity Generation

1.7.5 Biomethane Fuel

1.7.6 Thermal Application

2 Digestion Technologies and Types

9 Topics | 8 Quizzes

2.1 Digestion Technologies and Types

2.2 General Classifications

2.3 Overview of different digesters

2.3.1 Fixed Dome Digester

2.3.2 Floating Dome Digester

2.3.3 Balloon-Type Digester

2.4 Overview of different types of biogas sanitation units

2.4.1 Anaerobic baffled reactor with biogas capture

2.4.2 Anaerobic Lagoon

3 Process Parameters

13 Topics | 12 Quizzes

3.1 The Process Parameters

3.2 Temperature

3.3 Feedstock C:N ratio

3.4 TS and VS, COD and BOD

3.4.1 Total and Volatile Solids

3.4.2 Chemical Oxygen Demand (COD) & Biochemical Oxygen Demand (BOD)

3.4.4 Organic loading rate

3.4.5 Hydraulic and solid retention time

3.5 What is biological methane potential, and why is it important?

3.6 What is the difference between biomethane potential, methane yield, and methane production?

3.7 What is the biogas potential of various substrates?

3.8 How to measure or estimate the biogas or biomethane potential?

4 Biogas Installation Planning

10 Topics | 2 Quizzes

4.1 Social acceptance

4.2 Feedstock availability

4.3 Feedstock quality

4.4 Biogas Plant Design: An Exercise

4.4.1 Potential Biogas Generation, Utilisation and treatment

4.4.2 Sizing of the digester

4.4.3 Sizing of gasholder

4.4.4 Planning Effluent Management

4.4.5 What is to be done if there is no available space for post-treatment?

4.4.6 Planning Sludge Management

5 Operation and Maintenance

4 Topics | 2 Quizzes

5.1 Initial Testing

6 Sanitation Biogas Plants in Rohingya Refugee Camp

10 Topics | 9 Quizzes

6.1 Biogas Generation

6.1.1 Biogas Potential

6.2 Use of Biogas

6.3 Treatment Performance

6.4 Identified Challanges and Possible Solutions

6.4.2 Accumulation of Condensed Water Within the Gas Pipes

6.4.3 Hydrogen Sulphide

6.4.4 Gas Leakages

6.4.5 Effluent Management

Quiz 1.2

Biogas Sanitation 3 Process Parameters 3.8 How to measure or estimate the biogas or biomethane potential? Quiz 1.2

To reduce the desludging frequency and enhance the performance of the septic tank connected to a block of 5 toilets, a solution was suggested to intercept the toilet and septic tank with a biogas digester.

The required assumptions are summarised in the following table.

Indicator	Value	Unit
Biogas lamp (equivalent 60W)	0.07	m³/h
Biogas stove	0.45	m³/h
Rice cooker (2L)	0.14	m³/h
Biogas generator (1.5kW)	1.1	m³/h

Time limit: 0

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Question 1 of 4

1. Question
What is the potential utilisation rate (in hours per day) for the biogas lamps with 2m³/d of biogas?
- A) 22.4 hrs/day
- B) 18 hrs/day
- C) 28.5 hrs/day
- D) 32.4 hrs/day
Correct

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Question 2 of 4

2. Question
What is the potential utilisation rate (in hours per day) for the biogas stove with 2m³/d of biogas?
- A) 4.4 hrs/day
- B) 5.2 hrs/day
- C) 6.8 hrs/day
- D) 7.3 hrs/day
Correct

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Question 3 of 4

3. Question
What is the potential utilisation rate (in hours per day) for the rice cooker (2L) with 2m³/d of biogas?
- A) 8 hrs/day
- B) 10.2 hrs/day
- C) 12 hrs/day
- D) 14.3 hrs/day
Correct

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Question 4 of 4

4. Question
What is the potential utilisation rate (in hours per day) for the biogas generator (1.5kW) with 2m³/d of biogas?
- A) 1.2 hrs/day
- B) 1.8 hrs/day
- C) 2.4 hrs/day
- D) 4.2 hrs/day
Correct

Incorrect

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