Advertisements
Advertisements
Question
How can sewage be used to generate biogas ? Explain.
Solution
Sewage basically consists of human excreta. It may contain many microbes that may also be pathogenic. Gas made from the anaerobic digestion of agricultural and animal waste is called biogas. Treatment of sewage includes the following two stages:
- Primary treatment: Involves physical removal of particles by filtration and sedimentation
- Secondary treatment: Involves digestion of organic matter by bacteria
In anaerobic sludge digesters, anaerobic bacteria act on the activated sludge to produce biogas (CH4, CO2 and H2S). The effluent from secondary treatment plant is released into water bodies. Microbial technology for sewage treatment is very effective; no technology has been able to beat it till date. The anaerobic bacteria such as Methanobacterium produce methane along with CO2 and H2 during the secondary treatment.
APPEARS IN
RELATED QUESTIONS
Edible fruiting bodies are produced by _______.
Mention a product of human welfare obtained with the help of each one of the following microbes :
(a) LAB
(b) Saccharomyces cerevisiae
(c) Propionibacterium shermanii
(d) Aspergillus niger
Give an example of the non-edible or poisonous mushroom, studied by you.
Which of the following vitamins is not fat soluble?
(A) Vitamin A
(B) Vitamin B
(C) Vitamin D
(D) Vitamin K
Write the scientific name of the organism Alexander Fleming worked on and discovered the first antibiotic.
Was the organism he worked on a fungus or a bacterium ?
Answer in ‘one’ sentence :
What is fermentation?
Expand the following abbreviation DPD.
Many microbes are used at home during the preparation of food items. Comment on such useful ones with examples.
Species of ______ is involved in cheese formation.
Indian curd is prepared by inoculating milk with ______.
A young girl is health conscious. Her dietician advised her to include mushrooms in her diet. What must be the reason?
Name two bacteria which are responsible for fermenting dough of idli, dosa.
______ species of bacteria play significant role in fermenting the batter for idli and dosa.
By using which of the following Roquefort and Camembert cheese are ripened?
Complete the analogy with respect to microbial pesticide and their host.
Nosemalocustae : Grasshopper :: Nucleopolyhedrovirus : ____________.
What are viruses parasitising bacteria called? Draw a well labelled diagram of the same.
Mention a product for human welfare obtained with the help of the following microbe:
Lactobacillus
Microbes are useful to human beings in diverse ways. Give the biological name of the following microbe:
Lactic acid producing bacterium.
