Go to some of the small workshops to learn from it, the general small factory chemical throw are evaporated and brought out to reduce, you basically do not see will be discharged chemical throw, the new bath.
Semi-annual change should also not have to recycle that little bit of stuff.
The solution to the root of the problem is: the company spends money on phosphoric acid as their own money, it will not be so arbitrary emissions, bad tuning chemical throw is the ability to technical problems, do not say that the small factory product requirements are low, in fact, the real big brand product requirements are really low.