How should the concentrated water from desalination be handled?
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In my work, I need to deal with the concentrated brine water generated as a by-product; do anyone have any methods for this?
We set up a neutralization tank, using the water discharged from the anion and cation beds to neutralize each other before discharging it into the sewage recycling system for comprehensive treatment. I wonder if anyone has any better methods.
After two stages of reverse osmosis, the concentration of the concentrated water becomes extremely high; softening it further would be costly, making it unsuitable for reuse. We are excreted directly.
For different water qualities, reverse osmosis equipment can be used for treatment; our company has conducted research in this area, and it is utilized in various refineries
Collect them for use in backwashing the pre-filter
Concentrated water can be reused; if it cannot be treated any further, it can be used to water plants and trees.
In refineries, is it possible to reuse concentrated water in the cold coke water of delayed coking units? ! !
1. I’ve communicated with GE; their crystal growth technology can be used, with water consumption and electricity usage ranging from 30 to 50 kWh per unit；
It is very difficult to treat; reverse osmosis equipment can be used for this purpose, and it is employed in various refineries. If that doesn’t work, it can be used for watering plants
It can be softened and then recycled, but a set of softening equipment is required for this process……
The conductivity of the brine produced by desalination is around 2000; soft water treatment isn’t sufficient to address this issue, and landscaping options are also ineffective. Things become much simpler if there is a wastewater treatment plant available. If no solution is available, investing around 400,000 to purchase a desalinated water and concentrated water recovery system can resolve the issue.
Steel mills use it for slag flushing; it can be considered a form of waste utilization.
It can be collected for use in fire suppression systems; any excess must be discharged outside!
The conductivity of the brine produced by desalination is around 2000; soft water treatment isn’t sufficient to address this issue, and landscaping options are also ineffective. Things become much simpler if there is a wastewater treatment plant available. If no solution is available, investing around 400,000 to purchase a desalinated water and concentrated water recovery system can resolve the issue. ======================= Hehe, the conductivity of your concentrated water is a bit higher than that of our raw water (fresh water); the quality of your water is really excellent. Our concentrated water conductivity is around 6,000. With such good water quality, lush greenery, and a system for replenishing circulating water, none of these are problems for us. If nothing else works, concentrated water reverse osmosis recovery can be used (with such good quality concentrated water, ordinary reverse osmosis systems will suffice). The recovery rate of reverse osmosis can also be appropriately increased, thereby raising the conductivity of the concentrate stream.
It is possible to consider recycling 50%, with the specific amount determined based on factors such as water quality and water price
There is little point in reprocessing the concentrated water produced by reverse osmosis; moreover, this concentrated water does not contain any pollutants – it’s just very hard. It can be used to backwash fine sand filters, for flushing toilets, or for spraying roads. If its hardness isn’t extremely high, it can be used for watering green spaces and as landscape water
It’s not easy to handle, and reverse osmosis equipment is generally used; companies that want to achieve zero emissions have to incur costs for this.
The sea friends upstairs introduced methods for treating concentrated desalinated water, and in summary, there are mainly two such methods. First, discharge after further concentration (whether using reverse osmosis or any other method, the end result is concentration!) ), secondly, as mentioned on floor 9, the heating crystallization technique is used to evaporate the water in the concentrated solution (of course, a condenser can also be used to recover the water); the salts in the concentrated solution then become solid waste, at the cost of 30–50 kWh of electricity per cubic meter of water processed. From the perspective of finding solutions for dealing with concentrated wastewater, although the second method increases consumption, it is likely to be the most fundamental approach for meeting the requirement of zero discharge of industrial wastewater; other methods cannot resolve the issue completely.
Another method is to set up an evaporation pond outside the factory area, where the liquid can be evaporated. Now that some factories are proposing zero emissions, they go ahead and do it.