Abstract:
The aim of the invention is to create a method and a device that reliably guarantee the removal of contaminants from wastewater with good energy efficiencies, whereby the purified water can be fed in as a direct discharge or in special cases can be fed to a further purification process. A further aspect of said aim is the recovery of raw materials from agricultural and municipal wastewater or raw materials from biogas plants. Said aim is achieved by a method that comprises an electrolytic treatment of the wastewater by using an anode, which contains both materials that withstand the electrolysis and sacrificial materials that are dissolved during the electrolysis, which are both simultaneously exposed to the wastewater. A device for carrying out the method comprises, as the part of the anode that withstands the electrolysis, a dimensionally stable anode cage (4) made of platinum, titanium, niobium, palladium, ruthenium, or platinized titanium, to which anode cage aluminum, iron, magnesium, calcium, or mixtures of said metals are applied as sacrificial material. The invention can be used to treat wastewater.
Abstract:
A wastewater treatment process by an electrochemical apparatus, said apparatus having at least an electrochemical electrode (30), and said electrochemical electrode (30) having suitable electrode plates comprises the following steps: passing high concentration wastewater containing undesirable solutes through at least one electrochemical electrode (30) to which a DC electrical current is applied to destroy the undesirable solutes in the water intake, so as to output water having a lower concentration of the undesirable solutes; the DC current applied to the electrochemical electrode (30) comprises at least a constant potential difference stage exerted on both ends of the electrochemical electrode (30), and followed by a constant current stage through the electrochemical electrode (30).
Abstract:
PROBLEM TO BE SOLVED: To provide acidic electrolytic water having bactericidal activity for a long period (for example, 6 months or longer), and to provide a method for producing the same.SOLUTION: Acidic electrolytic water has an effective chlorine concentration of 15 ppm or higher, contains at least one selected from an acid salt of an inorganic acid, disodium dihydrogenpyrophosphate, sodium hexametaphosphate and sodium dihydrogen phosphate, has a pH value of 3.0 or higher and below 7.0, and has the LD 50 value of the acid salt of the inorganic acid of 300 mg or more. In a method for producing acidic electrolytic water, raw material acidic electrolytic water is prepared by electrolysis of chlorine-based electrolyte aqueous solution, and an acid salt of an inorganic acid is added to the raw material acidic electrolytic water having the effective chlorine concentration of 15 ppm or higher.
Abstract:
An electrocoagulation reactor (ECR) apparatus and methods of using the ECR apparatus in the treatment of a fluid stream. The ECR apparatus includes a noncorrosive cylindrical cell housing a plurality of horizontally stacked electrode plates. The electrode plates are held in a pair of grooved, crescent shaped non-conductive inserts. The ECR apparatus further includes two end flanges each having integral flow diverters to facilitate a continuous single serpentine flow of the fluid in the cell. The ECR apparatus further includes a single flow inlet and single flow outlet.