2. INDEX
1. Site Data
2. Present Scenario
3. Objective
4. Offered Solution & Technology
5. General Arrangement Layout & site pictures
6. Implementation
7. Safety
8. Operation & Maintenance
9. Consumables & Replacements
10. Ref.-Ozone Chemistry
3. Site Data :
STP Capacity : 350 KLD
STP Area & Height : 300 mยฒ x 6.0 m
AHU โ Air flow : 19,000 cfm (32,200 m3/hr)
Air Flow : Intermittent [Automatic]
AHU Duct Size & Length : 600 x 600 mm x 20 m
Air Changes per Hour : 18 - 20 nos.
4. Present Scenario :
Sewage Collection Tank & STP Room:
Raw sewage is entering the raw sewage collection tank & being
treated by sewage treatment plant. Since STP is in basement area,
appropriate ventilation is provided. Where fresh air is fed from
ground level & exhaust air is being exhausted in car park area.
5. Objective :
1. Prevent foul sewage odor to spread in car park area & subsequently
to surrounding receiving atmosphere.
2. Destroy odor causing gases coming from STP room.
6. Offered Solution & Technology :
๏ AHU duct air ozonation.
๏ Ozone is a very strong oxidizing agent.
๏ All foul odor generated from sewage are organic in nature, and can very
easily be oxidized (destroyed) by ozone.
๏ After oxidation by products does not cause objectionable odor & are
safe to dispose in surrounding air.
๏ Crucial part of the solution is to trap the foul odor & efficiently mix
with ozone gas to oxidize.
9. Safety First :
๏ผ Most Important :
๏ผIf required Air ozone sensors &
monitors are available.
๏ผOzone sensors can be interlocked
with ozone production & controlled
ozone level.
๏ผSystem can be pre-set for ozone level
10. Operation & Maintenance :
๏ Ozonator is fully electrical operated.
๏ Ozonator should be operated 24 x 7
๏ For flawless operation three ozonators are operated alternately.
(2 w +1S)
๏ Routine maintenance frequency is once in months
๏ Break-down repair/maintenance will be attained in 48 hrs.
(Under this situation, there is a provision of one standby unit)
12. STP Odor & Ozone Chemistry :
๏ In an aqueous solution, however, two competing simultaneous reactions occur, one to produce
elemental sulfur, and one to produce sulfuric acid:
H2S + O3 โ S + O2 + H2O
3 H2S + 4 O3 โ 3 H2SO4
๏ Ozone also oxidizes nitric oxide to nitrogen dioxide:
NO + O3 โ NO2 + O2
๏ This reaction is accompanied by chemiluminescence. The NO2 can be further oxidized:
NO2 + O3 โ NO3 + O2
๏ Ozone does not react with ammonium salts, but it oxidizes ammonia to ammonium nitrate:
2 NH3 + 4 O3 โ NH4NO3 + 4 O2 + H2O
๏ Ozone reacts with carbon to form carbon dioxide, even at room temperature:
C + 2 O3 โ CO2 + 2 O2
๏ Ozone reacts with methane to form carbon dioxide, even at room temperature:
3 CH4 + 4 O3 โ 3 CO2 + 6 H2O
13. Thanks For your Precious time
For more Information :
Visit : [www.chemtronicsindia.com ; www.ozonegeneratorindia.com]
Email: [response@chemtronicsindia.com]
Call : Mr. Sunil Shah - +91-9321234527