Treatment method of nonbiodegradable organic wastewater

Abstract

The invention discloses a treatment method of nonbiodegradable organic wastewater, which comprises the following steps of: injecting the organic wastewater to be treated into a reactor filled with catalyst particles, allowing organic matter in the organic wastewater to be oxidized by oxygen by the action of the catalyst particles to form inorganic matter, conveying effluent of the reactor to a separator, separating the catalyst particles from the effluent of the reactor by membrane separation or magnetic field separation, and entrapping the effluent to allow the effluent to flow back to the reactor, and taking effluent of the separator as final effluent. According to the method, a noble metal catalyst is not required to adopted; a low-cost transition metal is taken as a catalyst raw material; the cost of the catalyst is lowered; the catalyst is high in activity and stability; the possibility of poisoning is low; in addition, low temperature and atmospheric pressure reaction conditionsare only required in a reaction process; a pressure vessel is not required; technical difficulty and operating cost are greatly reduced; and the nonbiodegradable organic matter can be degraded into the inorganic matter such as CO2, N2 and H2O under the low temperature and atmospheric pressure conditions.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for treating organic wastewater that is difficult to biodegrade. Background technique [0002] Refractory biodegradable organic substances include phenols, humus, lignin, organic dyes, antibiotics, etc., mainly from municipal sewage, paper mill wastewater, printing and dyeing wastewater, digested sludge, etc. Such refractory substances usually have certain toxicity, irritating odor or color, are more harmful to the ecological environment, and are difficult to pass through conventional microbial methods (such as activated sludge method, biofilm method and anaerobic digestion method). etc.) to deal with degradation. However, if common physical and chemical techniques such as flocculation, adsorption, precipitation, stripping, etc. are used for treatment, a large amount of chemicals will be consumed, and further follow-up treatments are still required to remove these or...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to propose a treatment method for refractory organic wastewater, using non-precious metals as catalysts, which not only reduces the cost of the catalyst, but also does not require a pressure vessel, and can realize the decomposition of refractory organic matter at low temperature and normal pressure , to solve the existing problems of equipment and high operating costs in the existing refractory biodegradable organic wastewater treatment methods, and the catalyst is easily poisoned and deactivated

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