Rapid algae-liquid separation method for microalgae treatment wastewater

Abstract

The invention discloses a rapid algae-liquid separation method for microalgae treatment wastewater. The method includes the steps of collecting wastewater discharged by a sewage treatment plant to be put indoors for standby application, processing CODCr of wastewater through the potassium dichromate method, processing TN through the potassium persulfate oxidation ultraviolet spectrophotometry, processing TP through the antimony and molybdenum spectrophotometry, processing ammonia nitrogen through the Nessler spectrophotometry, and adjusting the pH through the glass electrode method. The method can be conducted in a cultivation device with the controllable turbulence intensity, temperature and light can be conveniently controlled, the efficiency of microalgae for processing wastewater is improved, no flocculant needs to be added under the turbulence condition, flocculating constituent is formed according to the property changes of microalgae cell surfaces so that algae and liquid can be separated, turbulence energy consumption can be sufficiently utilized, energy consumption is lowered, efficiency cost is improved, the pH of a culture solution is increased during processing, pathogenic organisms in a culture medium can be restrained, the produced flocculating constituent has high sedimentation speed, the algae-liquid separation efficiency is improved, operation is easy and convenient, cultivation conditions are easy to control, and an experimental device for the method is simple in structure, small in size, light in weight, high in practicability and repeatability, simple in process, convenient to machine, capable of saving labor, materials and financial resources, flexible to operate and convenient to clean.

Description

technical field [0001] The invention relates to a method for separating algae liquid, in particular to a method for rapidly separating algae liquid in waste water treated with microalgae. Background technique [0002] With the development of my country's economy, a large amount of domestic sewage and industrial sewage are discharged into rivers through sewage treatment equipment. In 2014, the total discharge of chemical oxygen demand in the country was 22.95 million tons, and the total discharge of ammonia nitrogen was 2.385 million tons. Even if the discharged sewage after treatment reaches the first-class A discharge standard, it is still far higher than the surface water Class V water quality standard. In order to improve the ecological environment, increase the reuse of water resources and waste, it is necessary to carry out advanced treatment of the discharged wastewater. Numerous studies have shown that microalgae are a promising resource for treating wastewater and po...

AI Technical Summary

Problems solved by technology

These algae liquid separation technologies have high energy consumption, secondary pollution, are difficult to operate and are affected by external factors (such as the pH of the culture solution), and are difficult to popularize and apply in industrial production. At present, centrifugal technology is mainly used in the industry to treat algae. dehydration

It can be seen that the separation of algae liquid is still the main difficulty restricting the popularization and application of microalgae treatment wastewater technology

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