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Dissolved air flotation, air dissolving tube, friction valve, flotation chamber, spiral scoops, flotation system configurations, and flotation biological systems (FBS) for conventional activated sludge process with sludge recycle are considered in the chapter. The case studies of FBS treatment systems in petrochemical industry effluent treatment, municipal effluent treatment, and paper manufacturing...
Oxyozosynthesis is a pressurized ozone–oxygen oxidation flotation process, which involves the use of ozone and oxygen as the oxidation agents for stabilization of wastes in a pressurized reactor to expedite the oxidation process. The wastes can be either a wastewater stream or a sludge stream (biosolids stream). Since the oxidation reactions occur under high pressure, the ozone and oxygen gases are...
When the 37.5 MGD (142 million liters per day) Pittsfield, MA, USA water treatment plant was installed in 1986 it became the world’s largest water treatment plant using dissolved air flotation (DAF) and automatic backwash filtration (ABF) technologies. Design features are presented in detail along with the plant’s performance data, and special features on total wastewater recycle. Total detention...
Experimental procedures are developed for simulation and evaluation of various air flotation and associated treatment processes, including mixing, flocculation, sedimentation, dissolved air flotation, induced air flotation, and filtration. These experimental procedures are useful for determination of chemical types, dosages, chemical reaction time, mixing intensity, pH condition, solids concentration,...
The characteristics and application of titanium dioxide and other fillers in the paper industry are introduced, the filler retention is defined, and the resources in whitewater and conventional processes are presented. Topics covered include a description of the paper industry, paper mill discharges, whitewater treatment and reuse, raw material recovery, opacity and fillers, available treatment technologies,...
An innovative 0.1-MGD (378 m3 per day) tertiary biological–physicochemical wastewater treatment plant (WWTP) consisting of equalization, rotating biological contactors (RBCs), secondary clarification (using both dissolved air flotation and gravity sedimentation), tertiary sand filtration and ultraviolet disinfection has been installed at Hancock, MA, USA, for treating the domestic sewage generated...
Wastepaper is recycled as pulp for the production of papers or boards. The pulp containing secondary fibers needs to be purified in a deinking installation. A total closed water system is developed for water reclamation in deinking installations. The pulp with inks is first processed with an induced (dispersed) air flotation (IAF) cell and then a washing unit (stock washer). The wastewater is clarified...
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