What should be the control criteria for suspended solids in low-pressure graywater?
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What should be the control criteria for suspended solids in low-pressure graywater?
100mg/L or 10mg/L?
Reaching 10 mg/L is quite difficult; levels below 100 mg/L are generally achievable.
Turbidity control at 50; generally 30-40
This post was last edited by Leiyuhuo on 2015-6-3 08:55. If it is well controlled, the value should be below 50; it also depends on the type of coal. However, it’s a bit difficult for us to keep the value below 50 – in most cases it’s around 70.
We are no more than 30; usually it’s between 10 and 20
Which brand of medication do you use? What is the COD range? What is the actual flash outlet temperature?
Finnish, with COD below 600
We use flocculants from Shanxi; with lignite water-coal slurry gasification, the suspended solids in the ash water can be kept around 30, and it definitely needs to be below 50. Water around 100 turns gray.
In any case, the lower the better, but 60 or 70 is also acceptable as it won’t cause scaling and has little impact on the system.
Turbidity: less than 100mg/m3