Economic and Environmental Benefits of Cleaner Technology …
205
12 Discussion
The sugar industry selected for study situated in Erode started in 1984, a large
scale industry and Red category (Annexure B in EIA), has a Bagasse co-generation
plant for paper board industry. The adverse effects of the industry like utilization off arm land for sugar cane production with Cauvery running at a distance
of 0.5 km functions with a capacity of 2500 TCD (Tons capacity per day) which
has now increased to 4750 TCD and this large scale red category industry has been
running successfully around 180 to 200 days in a year. Presently this unit incorporates advance technologies like co-generation, co-processing, recycling, inbuilt,
process-modification and closed loop water saving system technology, advanced
effluent treatment plant (ETP) technology to have reusing capacity, energy conservation technology “closed-loop” of water saving technology to achieve zero liquid
discharge (ZLD) connects, condensate polishing unit (CPU), cooling tower modification, cleaner technology. As a result, they procure a return on investment of (87.1)
and CBR of 1.887. Cleaner technology has high benefit, Hot water is recycled 3 times
a day, about 54,000,000 liter per year is recycled and Rs. 81 lakh per year costbenefit per liter leading to 0.07948 and total benefit liters is 12.58 percent cleaner
technology and In cooling tower ROI (2237.9%) for Rs. 1 investment and CBR the
value is higher in conventional technology (26.50) Environmental benefit are higher
in cleaner technology like water is recycled about 135,000,000 liters per year and
profit amount is Rs. 202.5 lakh per year. But comparing the ASP, the older one was
cheaper and slow on water treatment process, and the advantage are removing oil
and grease is recycled as against the cleaner technology where maintenances is high.
Connecting technology towards “closed-loop” system is a condensate polishing
unit, cooling water in conventional technology was through the Activated sludge
process (ASP). Cleaner technology used RO-Reverse osmosis, MGF-Multi grade
filter, and UF-Ultra filtration as add-on technology. Return on investment in effluent
treatment plant showed Conventional technology as (605.8%) and cleaner technology
as (−2.17%) shows there is a gain by using older technology and in new by modifying the process through add-on. In the cost-benefit conventional technology shows
advantage (6.916) than cleaner technology. There is also benefit on improvement
of water by recycling and used in irrigation purpose where cost-benefit per liter in
conventional technology is 0.02169 and cleaner technology is 3.92337. The energy
saved by using the technology, Co-generation, return on investment show Conventional technology (Renewable energy) is (−94.9%) loss and cleaner technology is
(−73.8%) for an investment Rs. 1. Compared to conventional technology, cleaner
technology is slightly low due to operational and maintenances cost which is high and
the capacity is huge. Comparing the cost benefit ratio value co-generation shows a
higher value (0.2719) than conventional technology. Using Biomass as raw material,
power savings is 3,420,000 kWh per year and Rs. 162.45 lakh per year is the profit.
For cleaner technology, Variable frequency drive (VFD) is (−51.7%) for an investment Rs. 1, cleaner technology is slightly low as operational and maintenances cost
was low than conventional technology. VFD was attached from 2004 and advantage
205
12 Discussion
The sugar industry selected for study situated in Erode started in 1984, a large
scale industry and Red category (Annexure B in EIA), has a Bagasse co-generation
plant for paper board industry. The adverse effects of the industry like utilization off arm land for sugar cane production with Cauvery running at a distance
of 0.5 km functions with a capacity of 2500 TCD (Tons capacity per day) which
has now increased to 4750 TCD and this large scale red category industry has been
running successfully around 180 to 200 days in a year. Presently this unit incorporates advance technologies like co-generation, co-processing, recycling, inbuilt,
process-modification and closed loop water saving system technology, advanced
effluent treatment plant (ETP) technology to have reusing capacity, energy conservation technology “closed-loop” of water saving technology to achieve zero liquid
discharge (ZLD) connects, condensate polishing unit (CPU), cooling tower modification, cleaner technology. As a result, they procure a return on investment of (87.1)
and CBR of 1.887. Cleaner technology has high benefit, Hot water is recycled 3 times
a day, about 54,000,000 liter per year is recycled and Rs. 81 lakh per year costbenefit per liter leading to 0.07948 and total benefit liters is 12.58 percent cleaner
technology and In cooling tower ROI (2237.9%) for Rs. 1 investment and CBR the
value is higher in conventional technology (26.50) Environmental benefit are higher
in cleaner technology like water is recycled about 135,000,000 liters per year and
profit amount is Rs. 202.5 lakh per year. But comparing the ASP, the older one was
cheaper and slow on water treatment process, and the advantage are removing oil
and grease is recycled as against the cleaner technology where maintenances is high.
Connecting technology towards “closed-loop” system is a condensate polishing
unit, cooling water in conventional technology was through the Activated sludge
process (ASP). Cleaner technology used RO-Reverse osmosis, MGF-Multi grade
filter, and UF-Ultra filtration as add-on technology. Return on investment in effluent
treatment plant showed Conventional technology as (605.8%) and cleaner technology
as (−2.17%) shows there is a gain by using older technology and in new by modifying the process through add-on. In the cost-benefit conventional technology shows
advantage (6.916) than cleaner technology. There is also benefit on improvement
of water by recycling and used in irrigation purpose where cost-benefit per liter in
conventional technology is 0.02169 and cleaner technology is 3.92337. The energy
saved by using the technology, Co-generation, return on investment show Conventional technology (Renewable energy) is (−94.9%) loss and cleaner technology is
(−73.8%) for an investment Rs. 1. Compared to conventional technology, cleaner
technology is slightly low due to operational and maintenances cost which is high and
the capacity is huge. Comparing the cost benefit ratio value co-generation shows a
higher value (0.2719) than conventional technology. Using Biomass as raw material,
power savings is 3,420,000 kWh per year and Rs. 162.45 lakh per year is the profit.
For cleaner technology, Variable frequency drive (VFD) is (−51.7%) for an investment Rs. 1, cleaner technology is slightly low as operational and maintenances cost
was low than conventional technology. VFD was attached from 2004 and advantage