Method for treating laboratory wastewater by PACT-MBR coupling technology

Abstract

The invention provides a method for treating laboratory wastewater by PACT-MBR coupling technology, which comprises the following steps of: (1) introducing the laboratory wastewater into a PACT aeration tank, and carrying out aeration treatment on the wastewater under the combined action of active carbon and microorganisms to obtain the first produced water; (2) introducing the first produced water into an MBR reactor, and filtering through a membrane component after the organic matters are completely degraded to obtain the second produced water. The method firstly treating laboratory wastewater by using a PACT technology to remove heavy metals and pollutants which are difficult to degrade so as to reduce the toxic effect on microorganisms in an MBR membrane and simultaneously improve thebiodegradability of the wastewater. After the PACT treatment is finished, the wastewater is subjected to biochemical treatment by combining with the MBR technology, so that the degradation capacity ofCOD in the wastewater is obviously enhanced. And the treated waste water can be discharged up to the standard.

Description

technical field [0001] The invention relates to the technical field of chemical wastewater treatment, in particular to a method for treating laboratory wastewater using a PACT-MBR coupling technology. Background technique [0002] Laboratory wastewater refers to the comprehensive wastewater generated in the process of teaching, scientific research, laboratory, testing, etc. The specific source is the comprehensive wastewater generated in the process of laboratory drugs, reagents, test solutions, residual reagents, container washing, instrument cleaning, etc. [0003] The laboratory wastewater mainly has the following characteristics: (1) The composition of the wastewater is complex, containing heavy metals such as lead, mercury, cadmium, hexavalent chromium, copper, antimony, ferrous iron, aluminum, manganese, and inorganic pollution such as acids, alkalis, and non-metal ions All kinds of organic pollutants and microbial pollutants such as pathogenic pathogens are corrosive,...

AI Technical Summary

Problems solved by technology

According to statistics, the types and quantities of reagents involved in chemical and pharmaceutical laboratories can reach 6,000 to 10,000; Reproducibility, and poor biodegradability; (3) The newly added types of wastewater discharge are obvious, and with the advancement of scientific research activities, new sewage discharges will often be produced; (4) The amount of wastewater discharge increases, with the country’s investment in scientific research Intensified efforts have been made, scientific research activities have increased, and the amount of wastewater discharged has increased year by year;

[0004] In view of the above characteristics, the hazards of laboratory wastewater mainly include the following points: (1) Corrosion of the discharge pipe network, such as acid wastewater corrodes iron sewers, organic solvent wastewater corrodes PVC pipes; (2) wastewater contains toxic and highly toxic substances, Heavy metals and refractory substances have an impact on the operation of urban sewage treatment plants; (3) Pollutants in wastewater may cause secondary pollution during the degradation process

[0005] At present, general urban sewage treatment plants do not have the treatment conditions to treat special discharges from chemical laboratories; when universities or scientific research laboratories treat laboratory wastewater, they usually use the method of neutralization, sedimentation and filtration, and the treatment effect is not ideal.

The treated wastewater still contains high concentrations of highly toxic substances, refractory substances, etc., which cannot meet the discharge standards

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