[pib] CSIR develops Green Crackers and E-crackers

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Mains Paper 3: Environment | Conservation, environmental pollution and degradation, environmental impact assessment

From UPSC perspective, the following things are important:

Prelims level: Read the attached story

Mains level: Tackling air pollution with greener alternatives


News

Less Polluting Crackers

  1. CSIR scientists has developed Less Polluting Firecrackers which are not only environment friendly but 15-20 % cheaper than the conventional ones
  2. These crackers have been named as SWAS, SAFAL and STAR.
  3. It has unique property of releasing water vapour and /or air as dust suppressant and diluent for gaseous emissions and matching performance in sound with conventional crackers.

I. SWAS (Safe Water Releaser)

  • SWAS crackers eliminates usage of (KNO3) Potassium nitrate and Sulphur with consequent reduction in particulate matter (30-35%) SO2 and NOx.
  • It has matching sound intensity with commercial crackers in the range of 105-110 dBA.
  • STAR eliminates usage of KNO3 and S with consequent reduction in particulate matter (35-40%), SO2 and NOx. It has matching sound intensity with commercial crackers in the range of 105-110 dBA.
  • SWAS has been tested for shelf life upto 3 weeks with consistent performance.

II. SAFAL (Safe Minimal Aluminium)

  • SAFAL has minimal usage of aluminium (only in flash powder for initiation) with consequent significant reduction in particulate matter(35-40 %) compared to commercial crackers.
  • It has matching sound intensity with commercial crackers in the range of 110-115 dBA.
  • PESO has been approached to analyse and test SWAS/STAR/SAFAL from point of view of safety, stability and other related issues.
  • Also functional prototypes of flower pots for substitution of BaNO3 (Barium nitrate) by low cost eco-friendly materials have been developed with significant reduction in particulate matter (30-35%).

III. STAR (Safe Thermite Cracker)

  • STAR has the capability to eliminate the usage of KNO3 and S with a consequent reduction in particulate matter (35-40 per cent), SO2 and NOx.

E-Crackers

  1. CSIR-CEERI, being an electronics laboratory, is developing safe and pollution free technology of electronic crackers (E-crackers) to meet latent social aspiration of enjoying fireworks.
  2. It includes various products like E-Ladi, E-Anar, system for E-cracker show etc. At present CSIR-CEERI is ready with the laboratory level prototype of E-Ladi.
  3. E-Ladi is based on high-voltage electrostatic discharge to generate light/sound effect.
  4. It is triggered by providing heat to the thermal switch which will give the excitement of firing the conventional cracker.
  5. The E-Ladi is also programmable to give various light/sound effect.

Working of E-Ladi

  1. High voltage generator is capable of producing very high voltage using the concept of tesla coil.
  2. These pods are connected in parallel to achieve desired light/sound pattern.
  3. The controller block consists of a pulse generator and a solid state device based circuit to control the switching of these pods.
  4. The second version of this prototype will include compact form factor and thermal actuation arrangement.

Other developments

  • CSIR-NEERI has also planned to use area source control through development of new systems called PURE-WAYU as also photochip material for local dust control.
Air Pollution
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