9 results about "Algae biomass" patented technology

The invention discloses a test device and method for researching physiological and ecological characteristics of disastrous periphytic algae and shellfish in a channel. The test device comprises a circulating water tank system, a multi-environmental factor coupling control system and an in-situ monitoring system, wherein the multi-environmental factor coupling control system is used for regulating and controlling one or more environmental factors of a water body in the circulating water tank system; the in-situ monitoring system is used for acquiring growth condition images of algae and / or activity condition images of shellfish in the circulating water tank system by adopting an AI behavior tracking camera, and extracting algae biomass data and / or shellfish movement behavior parameter data. According to the test method, algae biomass data and / or shellfish motion behavior parameter data are / is analyzed and processed to obtain a critical environment factor threshold value of algae and shellfish. According to the testing device, the environment of periphytic algae and shellfish can be simulated more truly, so that the physiological and ecological characteristics of the algae and shellfish can be researched more scientifically and more accurately.

The invention provides a lake water ecological system restoration method based on staged biological regulation and control, and belongs to the field of water environment treatment and water ecological restoration. According to the method, directional putting and regulation of aquatic animal communities are performed in three stages according to the recovery process of submerged plants: in the early regulation stage, carnivorous fishes are put to inhibit breeding of benthic omnivorous fishes; a middle-stage regulation and control stage: introducing benthonic animals to cooperatively control the quality of algae biomass and improve the transparency of the water body; in the later regulation and control stage, herbivorous fishes are put to promote plant tillering, lateral branch development and root system downward growth and expansion, and the substrate fixing capacity is enhanced; according to the method, the aquatic animals with the specific function class groups are sequentially put in stages, directional regulation and control of the aquatic animal community structure are effectively achieved, the planting success rate of the submerged plants is increased, growth of the aquatic plants is promoted, water transparency is improved, and a stable water ecosystem with the self-purification capacity is constructed.

The invention belongs to the technical field of sewage treatment, and discloses a bacteria-algae granular sludge storage and reactivation method which comprises the following steps: cleaning bacteria-algae granular sludge to be stored with pure water to obtain cleaned bacteria-algae granular sludge; adding the pretreated clear water and the cleaned bacteria-algae granular sludge into a storage reactor, and storing in a preset low-temperature environment and in a periodic light-dark alternating environment; when the stored bacteria-algae granular sludge needs to be reactivated, removing supernate in the storage reactor, and providing aeration and illumination in situ to obtain reactivated bacteria-algae granular sludge; a collaborative preservation system is formed through a clear water storage medium and coupling with a low-temperature environment and light-dark alternation period regulation and control means, so that the stored bacteria-algae system can quickly recover the sewage treatment efficiency, and meanwhile, the algae biomass is completely maintained; the obvious advantages are shown in the aspects of stability maintenance and function recovery efficiency of a symbiotic system of the bacteria-algae granular sludge.

The invention discloses an algae biomass prediction method based on state evolution consistency constraint. The method comprises the following steps: preprocessing acquired data; after STL time sequence decomposition is carried out, trend terms are reserved, and algae density trend components are obtained; establishing a physical constraint based on an algae growth kinetic equation to obtain a specific growth rate dynamic equation; constructing a dynamic embedded time sequence prediction model, and introducing a dynamic consistency gating mechanism and a time step prediction correction mechanism; performing model training and evaluation, and obtaining an algae density prediction optimization model after improvement; and outputting an algae biomass predicted value through the optimization model. According to the method, algae growth dynamics and state evolution of a deep learning time sequence prediction model are deeply fused, the defect that only a data-driven model lacks physical consistency is avoided, the extreme value is predicted and corrected through dynamics consistency constraint and time step, the adaptability of the model to a complex hydrological environment is improved, the prediction precision of the model is improved, and the prediction efficiency of the model is improved. And the model interpretability is improved.

An algae-based thermoplastic foam is provided having a protein-rich algae biomass selected from either microalgae, macroalgae or combinations thereof. The protein content is greater than or equal to 15% by weight of the algae biomass and the algae biomass is dried to a moister content of less than or equal to 15% by weight having an average particle size of up to 200 microns. The composition includes a resin configured to exhibit rheological properties suitable for blending with algae including a melting temperature less than 250° C. and a melt flow rate in excess of 0.01 g / 10 min. The foam includes a foaming ingredient selected from the group consisting of crosslinkers, compatibilizers, plasticizers, accelerants, catalysts, blowing agents, other ingredients, and combinations thereof.

The present invention relates to a process for deodorizing a Nannochloropsis algae biomass, comprising a) contacting the biomass with an adduct-forming compound selected from sodium bisulfite in an amount of 0.5-30% by weight, b) stirring or shaking, and c) collecting a solid from the suspension.

The invention discloses a composite system for promoting growth of blue-green algae and fixing carbon dioxide and a method, a system and application thereof. The composite system comprises a 2D MOF photocatalytic material, blue-green algae bacteria and a light source. According to the method, a 2D MOF material with a specific photocatalytic structure and blue-green algae are mixed in a culture medium, and co-culture is carried out under visible light irradiation. Wherein the 2D MOF material is used as an exogenous photosensitizer, generates photo-induced electrons and active oxygen species after absorbing light energy, and provides exogenous reducing power and energy for blue-green algae, so that the carbon dioxide fixing capacity, photosynthesis efficiency and central carbon metabolism activity of the blue-green algae are remarkably enhanced. The system and the method provided by the invention can obviously promote the accumulation of blue-green algae biomass and improve the synthesis amount of beta-carotene and chlorophyll a in the blue-green algae. The method is easy and convenient to operate, mild in condition, free of complex genetic modification or additional chemical reducing agents and suitable for the fields of microalgae culture, high-value pigment production and photosynthetic organism manufacturing.

The invention discloses an algae collaborative aquaculture wastewater circulation treatment system and treatment device. The system comprises a culture unit, a circulating power unit, a solid-liquid pretreatment unit, a circulating algae membrane treatment unit, a chemical dosing unit and a recycling unit, and all the units form a closed recycling water path through circulating pipelines. The solid-liquid pretreatment unit separates residual feed from suspended solids and forms a concentrated blowdown stream. The circulating algal membrane treatment unit brings the body of water into contact with the algal membrane interface and introduces the recovery stream into the recovery vessel (3). The recovery container (3) comprises an upper-layer recovery cavity (31) and a lower-layer sedimentation recovery cavity (36) which are vertically overlapped and communicated, and an overflow vertical pipe (33) is arranged between the upper-layer recovery cavity (31) and the lower-layer sedimentation recovery cavity (36); and the dosing unit is used for dosing a magnesium source into the overflow vertical pipe (33), so that struvite crystals are generated, settled and recycled in the lower settling and recycling cavity (36). The recycling unit outputs struvite crystals and algae biomass, and lower-layer supernate flows back to the breeding unit.

The invention provides an advanced treatment method of a sludge high-hydraulic-pressure dehydrated liquid, which comprises the following steps: S1, adding a magnesium source into the sludge high-hydraulic-pressure dehydrated liquid, adjusting the pH value to 8.5-9.5, and then recovering 60-80% of phosphate through a struvite crystallization method; s2, introducing the supernate in the step S1 into an adjusting tank, diluting the supernate until the ammonia nitrogen concentration is less than 100mg / L according to the water quality condition, and supplementing necessary trace elements of iron and boron; s3, introducing the adjusting liquid in the step S2 into a photobioreactor, inoculating ammonia-nitrogen-resistant green algae, and introducing specific nitrifying bacteria to form a bacteria-algae symbiotic system; s4, regularly introducing biochar into the algal-bacterial symbiotic system, so that the biochar and the algal-bacterial symbiotic system are combined to form floc with higher density, and the settling performance of algae is improved; and S5, periodically realizing primary concentration of the algae biomass through gravity precipitation, and carrying out centrifugal dehydration to obtain algae mud with high solid content.