Method for ground water and wastewater treatment

Abstract

Described is a method of water treatment including the steps of: a) Stripping water or dissolved gas by an inert gas b) Subjecting water to oxidation treatment to precipitate metals; and c) Removing precipitates from water. Oxidation treatment is a multi-stage oxidation treatment including the stages of: (1) contacting water with oxidant under pressure to precipitate metals from water; and (2) catalytic oxidation of water with oxidant, oxidation being catalysed by a catalyst, such as a zeolite catalyst, in a bed reactor or filter. Inert gas stripping is aimed at preventing growth of iron bacteria in the treatment system. Pressurised oxidation reduces the amount of oxidant injection required for catalytic oxidation. The method is particularly suited to removal of contaminants such as iron, manganese and arsenic from ground water.

Description

technical field [0001] The present invention relates to a method of treating water, in particular groundwater, to produce water to be used as drinking water, irrigation water or other commonly used treated groundwater. The method can also be used to treat wastewater, such as water from industry and mineral processing, for recycling or safe discharge into the environment. The present treatment system is essentially based on a pressurized fluid circuit, minimizing the volume of water treated and the volume of solid waste obtained. Contaminants and oxides are removed in a later step, minimizing or eliminating the need to inject strong oxidizing agents, and by this means disposal costs are minimized. The method is less dependent on various energy sources, but their use is not excluded. At the same time, the water treatment equipment used to realize the method is also described. Background technique [0002] Traditional water treatment systems employ ponds, tanks, reactors and...

AI Technical Summary

Problems solved by technology

These water treatment systems have a number of disadvantages: the overall treatment time is long, which is a major problem when treating well water used as drinking water; the footprint is large; large amounts of water are lost through evaporation rather than being reused; often Unable to control pond and open tank odors, unpleasant odors spread to residential areas; in the event of spills, spills or overflows in the ground, large quantities of untreated water or water in various stages of treatment are present in the system and are harmful to the environment threaten

Although high levels of iron in drinking water are not considered harmful, excess iron can affect the balance of other metals and compounds in the body and cause health problems in the long run

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