Water use PAC adjust the pH of the process description method in which the pH of the water treatment field is an important value, adjusting for all types of wastewater treatment, and ultimately, is pH. Currently, industrial waste water is also divided into two types of acid with alkali treatment, we referred to as acid waste. Such waste due to its nature of acids and bases, there are highly corrosive, but also with the process for dealing with interference will affect the quality of the treatment effect, which, in recent years, people used to be treated materialized law to regulate water quality pH, mainly deal with the use of chemical additives dosing. Physico-chemical treatment of wastewater using PAC pH effect: PAC due to the very wide range of pH adaptation, so in recent years, often as a regulator of industrial waste water treatment additives acid. PAC is mainly in use, will not be affected by the pH of the water, with a strong adsorption capacity and dewatering performance, and for the removal of pollutants in the water is high, the majority of users of the popular praise. Materialized PAC wastewater treatment pH Advantage: acidic wastewater treatment needs, according to the acidity of the measure with the dosage of PAC, and alkaline wastewater is relatively easier to deal with, because in alkaline Under the condition that can give full play to the role of the PAC, so that pollutants in the water was already fast coagulating sedimentation, and without the addition of other additives, and the need to add neutralizing acidic waste water treatment strengthened. Currently, the use of physical and chemical treatment effect relative to other PAC treatment method is more advantageous, and the treatment effect is very obvious, coupled with the maturity of acid wastewater treatment technology, there are a variety of treatment technologies, and now for the acid waste water also realized the treatment and reuse.