After treatment, is all the wastewater reused with no waste discharged?
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After treatment, is all the wastewater reused with no waste discharged? If there are emissions, then how are these emissions generally handled?
This question is too difficult to answer. 【The treated wastewater is utilized; there are always some waste products, and these are generally treated to make them harmless.】 】
After the wastewater is treated, if all of it is reused with no waste discharged, that constitutes zero emissions; however, this is currently very difficult to achieve. If zero emissions can be achieved, then emission standards would be unnecessary, and that would truly enable harmonious development between humans and nature
This is too idealistic; in China, there are probably very few places that can achieve zero wastewater discharge – almost none, in fact.
The treated wastewater can be recycled after being processed by a reclaimed water reuse system; the sludge generated from wastewater treatment can be burned or buried, and the biogas produced through anaerobic treatment can be purified for use or burned in flares~
The original poster is likely referring to wastewater reuse. The processes and purposes of wastewater treatment differ, which in turn results in different types of waste products. If wastewater treatment involves converting wastewater that does not meet standards into water that can be discharged according to those standards, then the waste products generated are water that meets the standards, sludge, and gases. In the case of wastewater reuse, the treated and qualified water is reused, while the waste products consist of sludge and concentrated water. Sludge can be treated by deep burial or incineration, while concentrated wastewater can be further treated or used for flushing boilers.