Waste water treatment generates a large quantity of sludge, which can be treated by
an aerobic digesters
floc
chemicals
oxidation pond
Methanogenic bacteria are not found in
rumen of cattle
gobar gas plant
bottom of water-logged paddy fields
activated sludge
Match the following column of bacteria and their commercially important products.
| Column I (Bacterium) |
Column II (Product) |
||
|---|---|---|---|
| A. | Aspergillus niger | 1. | Lactic acid |
| B. | Acerobacter aceti | 2. | Butyric acid |
| C. | Clostridium butylicum | 3. | Acetic acid |
| D. | Lactobacillus | 4. | Citric acid |
$$ \begin{aligned} &\text { Codes }\\ &A \quad B \quad C \quad D \end{aligned} $$
$2 \quad 3 \quad 4 \quad 1$
$$ \begin{aligned} &\text { Codes }\\ &A \quad B \quad C \quad D \end{aligned} $$
$2 \quad 4 \quad 3 \quad 1$
$$ \begin{aligned} &\text { Codes }\\ &A \quad B \quad C \quad D \end{aligned} $$
$4 \quad 3 \quad 2 \quad 1$
$$ \begin{aligned} &\text { Codes }\\ &A \quad B \quad C \quad D \end{aligned} $$
$\begin{array}{llll}\text { } 4 & 1 & 3 & 2\end{array}$
$$ \text { Match the following column of bioactive substances and their roles. } $$
| Column I (Bioactive Substance) |
Column II (Role) |
||
|---|---|---|---|
| A. | Statin | 1. | Removal of oil stains |
| B. | Cyclosporin A | 2. | Removal of clots from blood vessels |
| C. | Streptokinase | 3. | Lowering of blood cholesterol |
| D. | Lipase | 4. | Immuno-suppressive agent |
$$ \text { Choose the correct match } $$
Codes
A B C D
$2 \quad 3 \quad 1 \quad 4$
Codes
A B C D
$4 \quad 2 \quad 1 \quad 3$
A B C D
$\begin{array}{llll}4 & 1 & 3 & 2\end{array}$
Codes
$1 \quad 2 \quad 3 \quad 4$
The primary treatment of waste water involves the removal of
dissolved impurities
stable particles
toxic substances
harmful bacteria