Disposal method of pyrolysis comprehensive wastewater of solid waste

Abstract

The invention relates to the field of wastewater treatment, and particularly relates to a disposal method of pyrolysis comprehensive wastewater of solid waste. The disposal method comprises the following steps of first carrying out oil separation and precipitation treatment, gas-liquid blowing off treatment, advanced oxidation treatment and coagulation and precipitation treatment on high-pollutant-concentration pyrolysis condensation water which contains many aromatic compounds in sequence then mixing the high-pollutant-concentration pyrolysis condensation water with oven-drying and squeezing water, fume treatment wastewater, sanitary sewage and ground flushing water, which are subjected to primary precipitation treatment, finally, carrying out anaerobic treatment, facultative aerobic treatment, aerobic treatment, secondary precipitation treatment, the advanced oxidation treatment and secondary coagulation and precipitation treatment on formed comprehensive wastewater in sequence, and making the comprehensive wastewater meet a discharge requirement. By using the disposal method of the pyrolysis comprehensive wastewater of the solid waste, which is provided by the invention, the investment cost and the running cost of the wastewater can be effectively decreased; meanwhile, the integral shock-resistance ability is improved; moreover, the disposal method comprises multiple technical chains; requirements on yielding water of different grades and different standards can be met; the applicability is higher.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a solid waste pyrolysis comprehensive wastewater treatment method. Background technique [0002] Solid waste is the main source of air, water, and soil pollution, and the disposal method of solid waste is changing from "harmless" to "resourceful". At present, RDF pyrolysis of solid waste is a research hotspot and is recognized as a secondary It is a new technology for solid waste disposal with low pollution and high degree of resource utilization, which is most likely to be industrialized. [0003] Various wastewaters generated during pyrolysis and RDF preparation are called comprehensive wastewater. Comprehensive wastewater includes various types of wastewater; according to different generation points and pollutants, it mainly includes the following four categories: [0004] 1. Drying and extrusion water during material pretreatment; [0005] 2. Pyrolysis condensed water i...

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Problems solved by technology

[0012] In summary, solid waste pyrolysis comprehensive wastewater has the characteristics of complex components, high ammonia nitrogen, high volatile phenols, high surfactant, and heavy metal content, and is biologically toxic and high-concentration organic wastewater produced under reducing conditions. After treatment, it will have an extremely bad impact on the environment, and direct discharge into the industrial sewage pipe network will also have a great impact on the sewage plant that uses the activated sludge method

[0013] At present, there are many relatively mature process methods in the field of water treatment, but there is no effective method for the treatment of the above-mentioned solid waste pyrolysis comprehensive wastewater

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