Application of bio-membrane reactor in sewage treatment, carbon sequestration microalgae harvesting

Abstract

The invention discloses application of a bio-membrane reactor in sewage treatment, carbon sequestration microalgae harvesting. The bio-membrane reactor comprises a photo-biological reaction system, a gas allocation system and a column-shaped dissolved-gas-gas floating harvesting system. By adopting the reactor, deep sewage purification can be achieved by using microalgae. A vertical space can be very well utilized by using a vertically suspended membrane material; by adopting a membrane component, the gas-liquid transfer efficiency is greatly improved; due to a special arrangement mode of a curtain type membrane component, scattering loss of light can be reduced to the maximum extent, energy loss is avoided, efficient absorption and utilization of the microalgae on a luminous energy envelope are ensured, and the algae cell lighting homogeneity is achieved; low-cost green harvesting of the microalgae on membranes is achieved through simple mechanical scraping. Low-cost green gas dissolution-gas floating harvesting of the suspended microalgae is achieved through the column-shaped dissolved-gas-gas floating harvesting system, meanwhile CO2 dissolved gases are functionally concentrated in a harvesting device, and CO2 enriched microalgae culture is achieved through the gas allocation system and the column-shaped dissolved-gas-gas floating harvesting system in the culture process.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a photobiofilm reactor and a method for purifying sewage, high-efficiency carbon fixation and low-cost collection of microalgae. Background technique [0002] Traditional sewage treatment only treats sewage as a waste and pollutant. The traditional treatment process has problems such as long residence time, low treatment efficiency, large energy consumption and large carbon dioxide emissions. [0003] Microalgae has absolute advantages in purifying sewage: microalgae has simple structure, high photosynthetic efficiency, and short cultivation period; microalgae has the function of absorbing and consuming N, P and other nutrients in the water environment and adsorbing heavy metal elements; the photosynthesis of microalgae It takes a lot of CO 2 , if the CO emitted by the thermal power plant 2 It is used for large-scale cultivation of microalgae, which can reduce greenh...

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Problems solved by technology

[0005] In order to realize the resource utilization of wastewater and CO 2 High-efficiency biological immobilization of microalgae solves the problem of difficult harvesting of individual microalgae. The present invention designs a photobiofilm reactor that utilizes microalgae technology to achieve deep purification of wastewater, high-efficiency fixation of carbon dioxide, and low-cost harvesting of microalgae

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