Bissoy.com
Doctors Medicines MCQs Q&A

Related Questions

Activated sludge process uses micro-organisms to degrade organics from wastewater.
Consider the following statements regarding activated sludge process: 1. Industries prefer activated sludge process as it requires less space, does not produce obnoxious odours and requires less time for waste water treatment compared to trickling filter. 2. It requires skilled supervision 3. Biological treatment is enhanced because shock loadings are eliminated. Which of the above statements are correct?
For the conversion of particulate organics through Activated Sludge Process (ASP) what would be the Solid retention time considered?
Statement (I): Anaerobic sludge digester, by itself, is considered to be the better method than other methods of sludge treatment: Statement (II): During anaerobic sludge digestion, CH4 is produced; also rodents and other pests are attracted when digester sludge is dried. 
Which of the following coagulant is singularly effective in producing sludge for the activated sludge process
In an activated sludge process which type of pump is used to recirculate the sludge?
What is the solid loading rate in kg/ m2.d considered while designing a thickener to treat the sludge from air- activated sludge process?
Consider the following statements as regards a Septic Tank: 1. The size required is large and uneconomical when serving more than roughly 100 persons. 2. It can remove around 90% of BOD and 80% of suspended solids. 3. As compared to the sludge holding of a plain sedimentation tank, a septic tank can hold about 90% less of sludge volume. 4. Frequent removal of sludge is not required. Which of the above statements are correct?
Which of the following are claimed as advantageous in respect of aerobic sludge digestion as compared to anaerobic sludge digestion? 1. Lower BOD concentration in supernatant liquor 2. Production of a sludge with excellent dewatering propensity. 3. Greater production of methane 4. Lesser operating cost 5. Lesser capital cost Select the correct answer using the codes given below:
The moisture content of sludge is reduced from 90% to 80% in a sludge digestion tank. The percentage decrease in the volume of sludge, is