WATER TREATMENT
Date / Time |
Baseline daDate / Time New product |
############# |
0.109 |
9 / 8 |
0.099 |
|
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0.2
|
0.11 |
9 / 8 |
0.097 |
############# |
0.111 |
9 / 8 |
0.1 |
|
#############
0.18
|
0.112 |
9 / 8 |
0.096 |
|
#############
0.16
#############
|
0.112
0.117
|
9 / 8
9 / 8
|
0.095
0.093
|
|
#############
0.14
#############
|
0.117
0.116
|
9 / 8
9 / 8
|
0.096
0.098
|
|
#############
0.12
#############
|
0.108
0.1
|
9 / 8
9 / 8
|
0.096
0.099
|
|
#############
0.1
|
0.091 |
9 / 8 |
0.099 |
############# |
0.094 |
9 / 8 |
0.099 |
|
#############
0.08
|
0.085 |
9 / 8 |
0.099 |
############# |
0.086 |
9 / 8 |
0.099 |
|
#############
0.06
|
0.083 |
9 / 8 |
0.099 |
|
#############
0.04
#############
|
0.084
0.08
|
9 / 8
9 / 8
|
0.101
0.104
|
|
#############
0.02
#############
|
0.079
0.079
|
9 / 8
9 / 8
|
0.104
0.097
|
|
#############
0
#############
|
0.077
0.078
|
9 / 8
9 / 8
|
0.097
0.093
|
############# |
0.078 |
9 / 8 |
0.093 |
|
#############
0.076
Figure 2 - Admiralty corrosion rates : Original
#############
0.071
|
9 / 8
9 / 8
|
0.097
Time ( Days )
0.099
|
Corrosion Rate ( mpy )
1 12 23 34 45 56 67 78
( blue ) & new ( orange ) corrosion inhibitors
Original corrosion inhibitor
New corrosion inhibitor
89 100 111 122 133 144 155 166 177 188 199 210 221 232 243 254 265 276 287 298 309 320 331 342 353 364 375 386 397 408 419 430 441 452 which is now more important than ever . Water treatment chemistries allow for the removal of impurities , contaminants and pollutants such as bacteria , viruses , harsh chemicals and heavy metals that pose risks to health and ecosystems .
The continuous development of innovative products and technologies for cooling water treatment is essential to increase cycles of concentration , thereby allowing maximum water reuse and reducing freshwater needs . In wastewater treatment processes , chemistries are critical to help remove pollutants and harmful substances before the water is released back into rivers , lakes or oceans .
The following case studies explore water treatment technology innovations used in refining , mineral processing and chemical processing that aim to improve sustainability and reduce environmental impact . By implementing advanced chemicals and equipment , these industries have decreased water and chemical consumption , lowered CO 2 emissions , and significantly increased water recycling . Each highlights how modern innovations are driving more efficient , environmentally friendly operations in waterintensive industries .
Use of coagulant for improved sustainability
A large petroleum refinery in a drought-stricken area in Europe has two 450 m 3 / hour wastewater treatment plants that discharge wastewater into the sea . Together , the treatment plants allow for half of the water to be recycled for cooling make-up and other applications .
The initial challenge at one of the plants was related to the use of an inorganic ferric-based coagulant in the dissolved air flotation unit . Continuous use of this at high dosages resulted in elevated corrosion rates , increased solids and increased precipitation of phosphates , leading to a nutrient imbalance in the biological reactor .
All these issues contributed to a significant water recycling challenge and increased the likelihood of exceeding discharge limits because of poor water quality . Upon partnering with Solenis to analyse the problem and evaluate solutions , the refinery operators implemented a new water treatment programme using an organic coagulant that not only solved the corrosion problem but also provided substantial benefits .
Coagulants , one of the most important wastewater treatment chemicals , are often implemented as a first step to reduce both organic matter and suspended solids . The selection of an appropriate coagulant for the application depends on multiple variables and is a critical decision ; indeed , it is essential to ensuring proper unit performance , minimising sludge production , and supporting sustainability goals while lowering the overall environmental impact .
Implementing the new coagulant programme enabled the wastewater
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