3, sub-surface treated wastewater lift the principles and methods of treating wastewater lift generated by the sub-surface, mostly acid waste water containing Ni2 +, Sn2 +, F- and other small harmful ions in the processing method is acid-base neutralization. General acidic waste water shall be added to soda and adjust PH value to about 7 to 8.5. Meanwhile cation and in the process of Al3 +, Ni2 +, Sn2 +, Cr3 + and so form a hydroxide precipitate. After neutralization and precipitation of waste water pumped to unite Macro high aluminum sub-platform lift factory was established in 2008, the company will be located in Henan Province - Zhengzhou City, it is a professional production of aluminum ladders: Household ladder, aluminum household ladder, aluminum lift, multifunction aluminum ladder, aluminum bamboo ladder, aluminum lift platform, lifting platform, NRK lifting platform, hydraulic lifting platform, insulation ladder, herringbone ladder insulation, insulation ladder extension ladder reduction, etc. manufacturers, good quality, excellent price! ! ! Investment for the country. . Investment for the country. . Chat Hotline: 1313796858 18639591698 QQ: 1549368643 1260100960 Company website: www.zhonghui98.com www.honggaotizi.com www.shengjiangtizi.com www.pingtai1000.com