A method for rapid separation of algae liquid in microalgae treatment wastewater

Abstract

The invention discloses a method for rapid separation of algae liquid in waste water treated by microalgae. First, the waste water discharged from the sewage treatment plant is collected and placed indoors for standby. The CODCr of the waste water is treated with potassium dichromate method, and the TN is oxidized by potassium persulfate for ultraviolet spectroscopy. Photometric method, TP adopts molybdenum antimony anti-spectrophotometric method, ammonia nitrogen adopts nano reagent photometric method, pH adopts glass electrode method, and the present invention is carried out in a culture device that can control the disturbance intensity, which is convenient for temperature control and light control, and improves microalgae treatment. The efficiency of wastewater is carried out under disturbed conditions without adding flocculants, relying on the changes in the surface properties of microalgae cells to form flocs to separate algae liquid, which can make full use of disturbance energy consumption, reduce energy consumption, and improve efficiency costs. The pH increase of the medium culture medium can inhibit pathogenic microorganisms in the medium, and the flocs produced have a good sedimentation rate, which improves the separation efficiency of the algae liquid, is easy to operate, and the culture conditions are easy to control. The experimental device is simple in structure, small in size and light in weight. Strong practicability, strong repeatability, simple process, convenient processing, saving manpower, material and financial resources, and flexible operation, easy 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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