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Features of RO waste water
① high content of salt and silica, high PH value, high alkalinity;
②scaling salts whose ion product is far bigger than solubility product, such as calcium carbonate, calcium sulfate, barium sulfate, strontium sulfate;
③ there are bacteria and organic substances.
① high content of salt and silica, high PH value, high alkalinity;
②scaling salts whose ion product is far bigger than solubility product, such as calcium carbonate, calcium sulfate, barium sulfate, strontium sulfate;
③ there are bacteria and organic substances.
III. Outstanding issues of RO waste water recovery
Based on the above features of RO, many people think that the RO waste water is the difficult recovery waste water. But Beijing SHIBO Company has been endeavored for many years, takes use of high quality agents and relevant special designs to make the reuse of waste water come true. However, when we design the RO waste water, we must solve the following problems:
① easy scaling: because it is the waste water with four times concentration, the silica and alkalinity contents of waste water are very large, many scaling salts’ ion product are far bigger than the solubility product, such as: calcium carbonate, calcium sulfate, barium sulfate, strontium sulfate etc. If we don’t use the efficient methods to control them, it is necessary to have the scaling.
② easy blocking: in the RO waste water, the trace organics and colloids of feed water have been gathered together, if we don’t use the efficient methods to control them, there should be the blocking.
③ easy pollution: in the RO waste water, all the microorganisms of feed water have been gathered together, under the effect of various nutrient salts, which can grow quickly, and cause the biological pollution of RO membrane, therefore, we must to control them efficiently.
① easy scaling: because it is the waste water with four times concentration, the silica and alkalinity contents of waste water are very large, many scaling salts’ ion product are far bigger than the solubility product, such as: calcium carbonate, calcium sulfate, barium sulfate, strontium sulfate etc. If we don’t use the efficient methods to control them, it is necessary to have the scaling.
② easy blocking: in the RO waste water, the trace organics and colloids of feed water have been gathered together, if we don’t use the efficient methods to control them, there should be the blocking.
③ easy pollution: in the RO waste water, all the microorganisms of feed water have been gathered together, under the effect of various nutrient salts, which can grow quickly, and cause the biological pollution of RO membrane, therefore, we must to control them efficiently.
