259980
What gases are produced in anaerobic sludge digesters.
1 Methane and $\mathrm{CO}_2$ only
2 Methane, Hydrogen Sulphide and $\mathrm{CO}_2$
3 Methane, Hydrogen Sulphide and $\mathrm{O}_2$
4 Hydrogen Sulphide and $\mathrm{CO}_2$
Explanation:
In anaerobic sludge digester, aerobic microbes get killed. Anaerobic microbes digest the organic matter as well as aerobic microbes into soluble and gaseous products $\left(\mathrm{CH}_4, \mathrm{CO}_2, \mathrm{H}_2 \mathrm{~S}\right.$ etc)
AIPMT-2014
Microbes in Human Welfare
259973
Sewage water turns black due to action of
1 $\mathrm{H}_2 \mathrm{~S}$
2 $\mathrm{NH}_3$
3 $\mathrm{CH}_4$
4 $\mathrm{CO}_2$
Explanation:
Sewage water turns black due to the presence of various organic and inorganic compounds including hydrogen sulphide while taste and odor in water are due to the presence of dead microorganisms, dissolved gases and iron compounds.
BCECE-2011
Microbes in Human Welfare
259974
The high amount of $E$. coli in water is an indicator of
1 hardness of water
2 industrial pollution
3 sewage pollution
4 presence of chlorine in water
Explanation:
The high amount of E. coli in water is an indicator of fecal contamination which can lose a risk to human health due to potential waterborne diseases.
Uttarakhand PMT-2007
Microbes in Human Welfare
259975
What are the sediments in the settling tanks of tertiary treatment in STP called?
1 Activated sludge
2 Contaminants
3 Effluents
4 Sewage
Explanation:
In the sewage treatment, when Biochemical Oxygen Demand (BOD) of sewage has reduced the effluent is passed into setting tank. Here, the bacterial flocks settle and the sediment thus formed is called activated sludge.
259980
What gases are produced in anaerobic sludge digesters.
1 Methane and $\mathrm{CO}_2$ only
2 Methane, Hydrogen Sulphide and $\mathrm{CO}_2$
3 Methane, Hydrogen Sulphide and $\mathrm{O}_2$
4 Hydrogen Sulphide and $\mathrm{CO}_2$
Explanation:
In anaerobic sludge digester, aerobic microbes get killed. Anaerobic microbes digest the organic matter as well as aerobic microbes into soluble and gaseous products $\left(\mathrm{CH}_4, \mathrm{CO}_2, \mathrm{H}_2 \mathrm{~S}\right.$ etc)
AIPMT-2014
Microbes in Human Welfare
259973
Sewage water turns black due to action of
1 $\mathrm{H}_2 \mathrm{~S}$
2 $\mathrm{NH}_3$
3 $\mathrm{CH}_4$
4 $\mathrm{CO}_2$
Explanation:
Sewage water turns black due to the presence of various organic and inorganic compounds including hydrogen sulphide while taste and odor in water are due to the presence of dead microorganisms, dissolved gases and iron compounds.
BCECE-2011
Microbes in Human Welfare
259974
The high amount of $E$. coli in water is an indicator of
1 hardness of water
2 industrial pollution
3 sewage pollution
4 presence of chlorine in water
Explanation:
The high amount of E. coli in water is an indicator of fecal contamination which can lose a risk to human health due to potential waterborne diseases.
Uttarakhand PMT-2007
Microbes in Human Welfare
259975
What are the sediments in the settling tanks of tertiary treatment in STP called?
1 Activated sludge
2 Contaminants
3 Effluents
4 Sewage
Explanation:
In the sewage treatment, when Biochemical Oxygen Demand (BOD) of sewage has reduced the effluent is passed into setting tank. Here, the bacterial flocks settle and the sediment thus formed is called activated sludge.
259980
What gases are produced in anaerobic sludge digesters.
1 Methane and $\mathrm{CO}_2$ only
2 Methane, Hydrogen Sulphide and $\mathrm{CO}_2$
3 Methane, Hydrogen Sulphide and $\mathrm{O}_2$
4 Hydrogen Sulphide and $\mathrm{CO}_2$
Explanation:
In anaerobic sludge digester, aerobic microbes get killed. Anaerobic microbes digest the organic matter as well as aerobic microbes into soluble and gaseous products $\left(\mathrm{CH}_4, \mathrm{CO}_2, \mathrm{H}_2 \mathrm{~S}\right.$ etc)
AIPMT-2014
Microbes in Human Welfare
259973
Sewage water turns black due to action of
1 $\mathrm{H}_2 \mathrm{~S}$
2 $\mathrm{NH}_3$
3 $\mathrm{CH}_4$
4 $\mathrm{CO}_2$
Explanation:
Sewage water turns black due to the presence of various organic and inorganic compounds including hydrogen sulphide while taste and odor in water are due to the presence of dead microorganisms, dissolved gases and iron compounds.
BCECE-2011
Microbes in Human Welfare
259974
The high amount of $E$. coli in water is an indicator of
1 hardness of water
2 industrial pollution
3 sewage pollution
4 presence of chlorine in water
Explanation:
The high amount of E. coli in water is an indicator of fecal contamination which can lose a risk to human health due to potential waterborne diseases.
Uttarakhand PMT-2007
Microbes in Human Welfare
259975
What are the sediments in the settling tanks of tertiary treatment in STP called?
1 Activated sludge
2 Contaminants
3 Effluents
4 Sewage
Explanation:
In the sewage treatment, when Biochemical Oxygen Demand (BOD) of sewage has reduced the effluent is passed into setting tank. Here, the bacterial flocks settle and the sediment thus formed is called activated sludge.
259980
What gases are produced in anaerobic sludge digesters.
1 Methane and $\mathrm{CO}_2$ only
2 Methane, Hydrogen Sulphide and $\mathrm{CO}_2$
3 Methane, Hydrogen Sulphide and $\mathrm{O}_2$
4 Hydrogen Sulphide and $\mathrm{CO}_2$
Explanation:
In anaerobic sludge digester, aerobic microbes get killed. Anaerobic microbes digest the organic matter as well as aerobic microbes into soluble and gaseous products $\left(\mathrm{CH}_4, \mathrm{CO}_2, \mathrm{H}_2 \mathrm{~S}\right.$ etc)
AIPMT-2014
Microbes in Human Welfare
259973
Sewage water turns black due to action of
1 $\mathrm{H}_2 \mathrm{~S}$
2 $\mathrm{NH}_3$
3 $\mathrm{CH}_4$
4 $\mathrm{CO}_2$
Explanation:
Sewage water turns black due to the presence of various organic and inorganic compounds including hydrogen sulphide while taste and odor in water are due to the presence of dead microorganisms, dissolved gases and iron compounds.
BCECE-2011
Microbes in Human Welfare
259974
The high amount of $E$. coli in water is an indicator of
1 hardness of water
2 industrial pollution
3 sewage pollution
4 presence of chlorine in water
Explanation:
The high amount of E. coli in water is an indicator of fecal contamination which can lose a risk to human health due to potential waterborne diseases.
Uttarakhand PMT-2007
Microbes in Human Welfare
259975
What are the sediments in the settling tanks of tertiary treatment in STP called?
1 Activated sludge
2 Contaminants
3 Effluents
4 Sewage
Explanation:
In the sewage treatment, when Biochemical Oxygen Demand (BOD) of sewage has reduced the effluent is passed into setting tank. Here, the bacterial flocks settle and the sediment thus formed is called activated sludge.
