For the technology, what you did is true but still not sufficient. The most important phase (biological treatment) is missing, so the test result not meet the standard, the treated wastewater still not good enough.

For us the test result of the Authority is trustable and it is not necessary for you to take other sample for comparison. You should know that you can evaluate the quality of treated wastewater by visualization, but just roughly, not exactly. In fact, several samples look so transparent - bright, but the test result not meet the standard. Otherwise, several samples look yellow and even turbid somewhat, but the test result is so good, meet the standard.

We advise that you should contact the specific water & wastewater treatment company in order to get the comprehensive support. If you like to know more about the technologies, so you can take a look at: http://camix.com.vn/en/technologies/detail/anaerobic-suspended-growth-treament-technology-wwts_camix-vietnam-404.html  or http://camix.com.vn/en/technologies/detail/aerobic-trickling-biofilter-with-submersible-media-wwtp_camix-vietnam-402.html.

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