F&T preparing to ship another commercial water treatment system to New York to treat spent wastewater from coolant emulsion with Electrocoagulation and Clarification.

APPLICATION

The treatment and disposal of various spent waste streams has been largely limited to a multi-step procedure of acid break, pH adjustment with liquid chemistry addition or through thermal evaporation. The alternative being disposal by tanker trucks hauling off-site for dispensation but with the environmental obligation remaining a long term responsiblilty.

SOLUTION

F&T's process incorporates electro-coagulation (EC) pretreatment along with a process waste and water filtration system. EC utilizes a controlled form of direct current as the force to initiate chemical reactions within a solution or emulsion. This electrical energy disrupts the equilibrium of the fluid and drives the various molecules to the point of instability. Metals precipitate through oxidation reduction, colloidal suspensions are broken and emulsified oil is released. These components flow into the system for dry chemical addition, agglomeration and filtration with resulting water available for sewer discharge or potential reuse.

PROCESS

When liquids become spent they are removed from reservoir tanks and placed into a waste holding tank. The wastewater is pumped into the EC cell where pretreatement takes place as the liquid flows past the electrically charged anode and cathode plates inducing the fluid with electrochemical ions destabilizing the fluid thus causing separation. The fluid exits the EC unit and is pumped into the reaction tank as part of the system. Proprietary dry separation chemistry (PDC) is then added by way of a precise volumetric feeder. The feeder utilizes a variable speed drive which can be adjusted to coincide with the feed rate of the PDC chemistry to accommodate changes in the flow rate and processing of the incoming separated fluid. During the mixing process the dry chemistry becomes hydrated in the reaction tank entrapping the separated ions into gradually agglomerating solids. As these solids underflow a baffle within the reaction tank they enter a more quiescent area where the mixed chemistry continues to hydrate into concentrated floc revealing clear water separation. The floc and water overflows into a "High Performance", Deep Bed Gravity Filter. As the treated water passes through the filter, the flocked solids are removed by the disposable filter media, thus allowing only clean water to drain by gravity into a reservoir tank which can be pumped or gravity drain to sewer discharge or potential reuse.