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Ecological harvesting method for thallophyta daphnia

A harvesting method, the technology of Daphnia algae, applied in the field of environmental technology and renewable energy, can solve the problems of high cost of microalgae biodiesel

Inactive Publication Date: 2013-04-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for the ecological harvesting of Daphnia algae for the above-mentioned water body purification and the high-cost problem of limiting the industrialization of microalgae biodiesel, which is realized by the following steps:

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Embodiment 1

[0021] The invention provides a high-yield cleaning method for ecologically energy-saving harvesting of Daphnia algae with nutrient-rich water. It is based on the existing research results and technology of extracting bioenergy from microalgae as raw material and constructing daphnia algae system, and extracting bioenergy from daphnia, by using nutrient-rich water as the culture medium to construct high-yield and stable daphnia algae The system harvests daphnia at a certain rate and extracts bioenergy from daphnia.

[0022] 1. Construction of Daphnia algae ecosystem in nutrient-rich water:

[0023] see figure 1 , figure 2 , Daphnia algae ecosystem consists of culture pool, culture solution, CO 2 Composed of gas and shrimp nets, the cultivation tank is divided into water channels of about 2.0±0.1 meters by a partition wall, and the water depth is 1.5-2 meters. The material of the cultivation tank and the partition wall is made of transparent glass or cement, and an impelle...

Embodiment 2

[0032] In order to simplify management, reduce costs and improve system output and ecological stability, the present invention uses native fungi, algae and daphnia in industrial sewage and domestic sewage, and algae and daphnia with high fat content can also be used. However, species such as fish and shrimp in the cultivation tank should be removed before cultivation (especially before supplementary water enters the pond), so that a food chain can be formed in the system (see image 3 ), the algal flea food chain system is suitable for both seawater and freshwater water bodies, the difference is that the seawater system needs to use marine microalgae and daphnia suitable for the local environment.

[0033] Table 1 analyzes the differences in various indicators between the Daphnia algae harvesting system and the single microalgae biomass cultivation system, confirming that the method of the present invention can greatly improve the sewage purification efficiency, increase energy...

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Abstract

The invention provides an ecological harvesting method for thallophyta daphnia, which uses industrial or domestic sewage as culture liquid and forms and builds a thallophyta daphnia ecological system formed and built through a culture pool, culture liquid, CO2 gas and a shrimp net. Through screening and improving the fungi suitable for eutrophy water system purification and high-oil and high-yield microalgae and daphnia quality, the most proper thallophyta daphnia community is built, a filter screen is used for harvesting the daphnia with large sizes and rich grease, in addition, biological energy is extracted from the daphnia, and the water body purification and the high and stable yield of the biological energy are realized. During the eutrophy water purification, the daphnia biomass capable of extracting biodiesel can be obtained at high yield, the production energy consumption is reduced, good ecological, social and economic values are realized, and wide application prospects are realized. The method of the invention belongs to the thallophyta daphnia ecological production energy purification method of the eutrophy water in the field of renewable biological energy resources, and the problem of high-energy-consumption harvesting of a sewage purification and microalgae culture system is solved.

Description

technical field [0001] The invention belongs to the field of environmental technology and renewable energy. In particular, it relates to a method for ecologically harvesting Daphnia algae under the condition of nutrient-rich water, while achieving the purpose of purifying the water body. Background technique [0002] The raw materials for traditional biodiesel production have changed from farmland crops and non-agricultural land plants to aquatic algae. The first generation of biodiesel mainly uses soybeans, rapeseed and other crops as raw materials. Because this bioenergy production method using traditional crops as a raw material source endangers human food security. Therefore, non-agricultural terrestrial plant raw materials such as jatropha in southern China and pistachio chinensis in the north are gradually being valued. However, due to production constraints, terrestrial agroforestry plant raw materials simply cannot meet the demand for fossil fuel alternatives. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K67/033
Inventor 王根轩仇云鹏
Owner ZHEJIANG UNIV
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