Question

“Microbes play a dual role when used for sewage treatment as they not only

help to retrieve usable water but also generate fuel”. Explain.​

Answer 1

Explanation:

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• ᴍɪᴄʀᴏʙᴇs ɴᴀᴛᴜʀᴀʟʟʏ ᴘʀᴇsᴇɴᴛ ɪɴ ᴛʜᴇ sᴇᴡᴀɢᴇ ᴀʀᴇ ᴇᴍᴘʟᴏʏᴇᴅ ɪɴ ᴛʜᴇ sᴇᴄᴏɴᴅᴀʀʏ ᴛʀᴇᴀᴛᴍᴇɴᴛ ᴏғ ᴛʜᴇ sᴇᴡᴀɢᴇ.

• ᴛʜᴇ ᴇғғʟᴜᴇɴᴛ ғʀᴏᴍ ᴛʜᴇ ᴘʀɪᴍᴀʀʏ ᴛʀᴇᴀᴛᴍᴇɴᴛ ɪs ᴘᴀssᴇᴅ ɪɴᴛᴏ ʟᴀʀɢᴇ ᴀᴇʀᴀᴛɪᴏɴ ᴛᴀɴᴋs.

• ᴛʜɪs ᴀʟʟᴏᴡs ᴛʜᴇ ʀᴀᴘɪᴅ ɢʀᴏᴡᴛʜ ᴏғ ᴀᴇʀᴏʙɪᴄ ᴍɪᴄʀᴏʙᴇs ɪɴᴛᴏ ғʟᴏᴄs ᴡʜɪᴄʜ ᴄᴏɴsᴜᴍᴇ ᴛʜᴇ ᴏʀɢᴀɴɪᴄ ᴍᴀᴛᴛᴇʀ ᴏғ ᴛʜᴇ sᴇᴡᴀɢᴇ ᴀɴᴅ ʀᴇᴅᴜᴄᴇs ᴛʜᴇ ʙᴏᴅ.

• ᴛʜᴇɴ ᴛʜᴇ ᴇғғʟᴜᴇɴᴛ ɪs ᴘᴀssᴇᴅ ɪɴᴛᴏ ᴀ sᴇᴛᴛʟɪɴɢ ᴛᴀɴᴋ, ᴡʜᴇʀᴇ ᴛʜᴇ ғʟᴏᴄs ᴀʀᴇ ᴀʟʟᴏᴡᴇᴅ ᴛᴏ sᴇᴅɪᴍᴇɴᴛ ғᴏʀᴍɪɴɢ ᴛʜᴇ ᴀᴄᴛɪᴠᴀᴛᴇᴅ sʟᴜᴅɢᴇ.

• ᴍᴀᴊᴏʀ ᴘᴀʀᴛs ᴏғ ᴛʜɪs ᴀᴄᴛɪᴠᴀᴛᴇᴅ sʟᴜᴅɢᴇ ɪs ᴘᴜᴍᴘᴇᴅ ɪɴᴛᴏ ᴀɴᴀᴇʀᴏʙɪᴄ sʟᴜᴅɢᴇ ᴅɪɢᴇsᴛᴇʀs, ᴡʜᴇʀᴇ ᴛʜᴇ ᴀɴᴀᴇʀᴏʙɪᴄ ʙᴀᴄᴛᴇʀɪᴀ ᴅɪɢᴇsᴛ ᴍɪᴄʀᴏʙᴇs ɪɴ ᴛʜᴇ ᴀᴄᴛɪᴠᴀᴛᴇᴅ sʟᴜᴅɢᴇ.

• ᴅᴜʀɪɴɢ ᴛʜɪs ᴅɪɢᴇsᴛɪᴏɴ ʙᴀᴄᴛᴇʀɪᴀ ᴘʀᴏᴅᴜᴄᴇ ᴀ ᴍɪxᴛᴜʀᴇ ᴏғ ɢᴀsᴇs ʟɪᴋᴇ ᴍᴇᴛʜᴀɴᴇ, ʜʏᴅʀᴏɢᴇɴ sᴜʟᴘʜɪᴅᴇ ᴀɴᴅ ᴄᴀʀʙᴏɴ ᴅɪᴏxɪᴅᴇ, ᴡʜɪᴄʜ ғᴏʀᴍ ᴛʜᴇ ʙɪᴏɢᴀs ᴀɴᴅ ᴄᴀɴ ʙᴇ ᴜsᴇᴅ ᴀs ᴀ sᴏᴜʀᴄᴇ ᴏғ ᴇɴᴇʀɢʏ. ᴛʜᴇ ᴇғғʟᴜᴇɴᴛ ɪs ɢᴇɴᴇʀᴀʟʟʏ ʀᴇʟᴇᴀsᴇᴅ ɪɴᴛᴏ ʀɪᴠᴇʀs ᴀɴᴅ sᴛʀᴇᴀᴍs.

Answer 2

Answer:

microbes play a dual role when used for sewage treatment as they not only help to retrieve usable water but also generate fuel . ... After the primary treatment ie sewage is mixed with air and aerobic bacteria grow into it. It produces floc which settles in the settling tank in the next stage and forms activated sludge.