Method for purifying cultivation sewage by 'marine sponge-microalgae' integration system

An integrated system and aquaculture wastewater technology, applied in the field of bioremediation, can solve problems such as polluting the environment and wasting resources, and achieve the effects of good effect, increased biomass and simple procedures

Inactive Publication Date: 2008-07-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for factory farming wastewater, a large amount of it is discharged into the offshore environment, which not only pollutes the environment, but also wastes resources (aquaculture wastewater has a large amount of inorganic N and P salts).
There is currently no good solution

Method used

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  • Method for purifying cultivation sewage by 'marine sponge-microalgae' integration system
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  • Method for purifying cultivation sewage by 'marine sponge-microalgae' integration system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The following is attached figure 1 with 2 The implementation process of the technology of the present invention is described in detail.

[0025] 1. Collect sponges in the intertidal sea area, wash them with natural sea water, put them in an incubator with refrigeration facilities, and quickly transport them to the temporary breeding place.

[0026] 2. In the temporary breeding place, rinse the sponge with sand filter seawater three times, put the sponge block into a 200L aquarium filled with flowing natural seawater and inflate it, and raise it temporarily at 10-23°C for 2-3 days. Temporary breeding density is not more than 0.5-3‰ (sponge biomass-g / seawater volume-L), daily water change: 1-4 times the volume of the temporary cultivation pool.

[0027] 3. Marine bait microalgae (such as Nitzschia crescentus) are cultivated at high density in algae pools (add Conway nutrient salts, 3000lx light intensity, light-to-dark ratio of 14:10 per day, and a culture temperature o...

Embodiment 2

[0040] The role of inorganic N and P salts in the "sponge-microalgae" integrated system for sterilization of aquaculture wastewater:

[0041] In order to explore the feasibility of the "microalgae-sponge" integrated system to remove inorganic N and P salts in seawater, about 70×10 4 Cells / mL marine microalgae (Nitzeria lunata) were used for experiments, and the temperature was controlled at 10-23°C. In the experiment, 10L of sand-filtered seawater was added to four 14L aquariums, which were boiled and sterilized, and allowed to cool to room temperature. Add a certain density of marine microalgae (Nitzeria crescentus) respectively in 3 aquariums, wherein 2 aquariums put into sponge as treatment group 1 and 2 (T-1 and T-2), 1 aquarium does not A sponge was put in as control 2 (C-2). The fourth aquarium was kept without algae or sponge as control 1 (C-1). When the algae growth just reached the exponential growth phase, nutrient salts (the nutrient salts of simulated aquacultur...

Embodiment 3

[0046] The role of the "sponge-microalgae" integrated system in removing inorganic N and P salts in actual aquaculture wastewater:

[0047] The experimental conditions for the "microalgae-sponge" integrated system to remove inorganic N and P salts in sea cucumber aquaculture wastewater are the same as those in "Example 1", except for the following points: (1) replace "Example 1" with actual sea cucumber aquaculture wastewater 1” Sterilized sand-filtered seawater boiled and cooled to room temperature in the experiment; (2) Marine microalgae (Nitztophthora lunata) with an initial inoculation density of about 50×104cells / mL were used. The removal rate results of the "sponge-microalgae" integrated system for removing inorganic N and P salts in actual aquaculture wastewater are shown in Table 2.

[0048] Table 2: The removal rate of inorganic N and P salts in actual aquaculture wastewater by the "sponge-microalgae" integrated system

[0049]

[0050]

[0051] In the experime...

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Abstract

The invention relates to a bioremediation technology for polluted seawater, which is a method to purify breeding wastewater with a system integrated with 'sponge-microalgae'. 1) first, marine feed microalgae is directly inoculated in factory breeding wastewater to transform the inorganic N, P salt in seawater into microalgae biomass; 2) 3-24h after inoculating the microalgae, the sponge is put into the breeding wastewater with increased microalgae biomass to filter-feed the microalgae; the system integrated with 'sponge- microalgae' is applied to removing inorganic N, P salt in the seawater to be transformed into microalgae and sponge biomass, thereby purifying the polluted water. The invention makes use of biotransformation, indirectly removes excessive inorganic N, P salt in breeding seawater, reduces the pressure of the environment and increases the biomass of sponge, thereby having wide application and being capable of bringing great economic benefit and social benefit.

Description

technical field [0001] The present invention relates to the bioremediation technology of polluted seawater environment, which is a kind of biotransformation of inorganic salts in seawater by marine microalgae and the filter-feeding characteristics of marine benthic animals. The method of sponge biomass removes inorganic N and P salts in seawater. Background technique [0002] my country is a big country in marine life breeding. With the rapid development of the offshore aquaculture industry, a large amount of inorganic salts (especially inorganic N and P salts) enter the seawater, resulting in eutrophication of the seawater, resulting in an increase in the area and frequency of red tide outbreaks every year, seriously endangering the mariculture industry and the marine ecological environment. [0003] It is urgent to solve the red tide problem. Due to the large-scale characteristics of seawater, ideal technical methods are still lacking. At present, the main method for re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32A01K61/00
CPCY02A40/81
Inventor 张卫付晚涛吴益春薛凌云金美芳
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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