Innovative flotation-filtration wastewater treatment system

Innovative Flotation-Filtration Wastewater Treatment Systems. 249... [Pg.231]

FIGURE 6.1 Relationship between H2S03 and HS03 at various pH values. (Taken from Krofta, M. and Wang, L.K., Design of Innovative Flotation-Filtration Wastewater Treatment Systems for a Nickel-Chromium Plating Plant, U.S. Department of Commerce, National Technical Information Service, Springfield, VA, Technical Report PB-88-200522/AS, January 1984.)... [Pg.242]

INNOVATIVE FLOTATION-FILTRATION WASTEWATER TREATMENT SYSTEMS... [Pg.249]

There are two innovative flotation-filtration wastewater treatment systems that are technically feasible for the treatment of the nickel-chromium plating wastewater. [Pg.249]

Another innovative flotation-filtration wastewater treatment system adopts the innovative use of the chemical ferrous sulfide (FeS), which reduces the hexavalent chromium and allows separation of chromium hydroxide, nickel hydroxide, and ferric hydroxide in one single step at pH 8.5. Figure 6.7 illustrates the entire system. Again, a DAF-filtration clarifier plays the most important role in this wastewater treatment system. [Pg.249]

FIGURE 6.6 Innovative flotation-filtration wastewater treatment system using conventional chemicals. [Pg.250]

The treatment efficiencies of the two innovative flotation-filtration wastewater treatment systems (Figures 6.6 and 6.7) are expected to be higher than those of the conventional reduction-precipitation system. [Pg.255]

The innovative flotation-filtration wastewater treatment system (Figure 6.6) using conventional chemicals has the highest flexibility and best performance. When desirable, the innovative chemical FeS or equivalent can also be used. [Pg.255]

Another innovative flotation-filtration wastewater treatment system using FeS (Figures 6.7 and 6.8) is highly recommended if a totally new system is to be designed and installed for treatment of nickel-chromium plating wastewater. This system is extremely compact, easy to operate, and cost-effective. Treatment efficiency is also excellent. [Pg.255]