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A bacteria gives birth to two new bacteria in each second and the life span of each bacteria is 5 seconds. The process of the reproduction is continuous until the death of the bacteria. initially there is one newly born bacteria at time t = 0, the find the total number of live bacteria just after 10 seconds :
Consider the following statements with reference to the mixing of industrial waste water with domestic waste water: 1. The industrial waste water can be mixed with domestic water when it has higher BOD. 2. The industrial waste water can be mixed with domestic water when the pH value of industrial waste water is highly alkaline. Which of the above statements is/are correct?
Essentially in an experiment involving bacteria, we measure Optical density of the media where the bacteria grow at different time point from the same flask. If we have 2 or more types of bacteria and want to investigate whether the growth curve of those bacteria are significantly different, what do you think the best analysis can be applied for this purpose?
Consider the following statements regarding waste stabilization ponds: 1. The pond has a symbiotic process of waste stabilization through algae on one hand and bacteria on the other 2. The oxygen in the pond is provided by algae through photosynthesis 3. The detention period is of the order of two to three days 4. The bacteria which develop in the pond are aerobic Which of the above statements are correct?
A continuous process is set up for treatment of wastewater. Each day, 103 kg cellulose and 105 kg bacteria enter in the feed stream, while 102 kg cellulose and 1.5 x 102 kg bacteria leave in the effluent. The rate of cellulose digestion by the bacteria is 8 x 102 kg d-1. The rate of bacterial growth is 4x 102 kg d-l; the rate of cell death by lysis is 6 x 102 kg d-1. Write balances for cellulose and bacteria in the system.
Following the two statements below. And II label has two conclusions. Assuming that the statement information is correct, decide which of the information given in the statements follows logically and definitively. Statements: All eggs are waste. All waste is food. Conclusion I: Some food are waste. Conclusion II: Some waste are eggs.
The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the most logical order of sentences from among the options. P: E-waste is valuable as a source of secondary raw material. Q: But it is also toxic if disposed of improperly. R: When we talk about recycling household and work place things, we tend to ignore or are less aware of how to deal with the electrical and electronic waste (sometimes called e-waste). S: Due to rapid technology change, obsolescent items have created a fast growing mass of electronic waste around the globe.
Average quantity of waste that is collected from a colony on Monday and Tuesday is 21 kg. and average quantity waste that is collected from Tuesday to Friday is 18 kg. If average quantity of waste that is collected on all the five days is 18 kg, then how much waste is collected on Tuesday?
The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the mostlogical order of sentences from among the options. P: E-waste is valuable as a source of secondary raw material.
Q: But it is also toxic if disposed of improperly.
R: When we talk about recycling household and work place things, we tend to ignore or are less aware of how to deal with the electrical and electronic waste(sometimes called e-waste).
S: Due to rapid technology change, obsolescent items have created a fast growing mass of electronic waste around the globe.
Two pipes A and B can separately fill a cistern in 10 and 15 minutes respectively. A person opens both the pipes together when the cistern should have been was full he finds the waste pipe open. He then closes the waste pipe and in another 3 minutes the cistern was full. In what time can the waste pipe empty the cistern when fill ?