Abstract: An integrated method for clearance, collection and capture of internal pollutants and algae at the bottom of a lake include the following steps: selecting areas where the pollution level is high, and organic or inorganic particulate matter is prone to accumulation and carrying out trenching operations at the bottom of the lake to form a plurality of traps; and removing the sludge and algae inside the traps and clearing the sediment inside the traps, for subsequent internal pollution control when the surface-layer sludge on both sides of the traps almost fills up the traps. This method makes use of the hydrodynamic disturbances of waves formed by natural wind energy and lake currents to continuously transport sludge with a high pollution level and a small specific gravity and algae in the surface layer of the lake bottom, which are rich in organic debris, to artificially built traps.

Abstract: A method for systematically controlling rapid proliferation of cyanobacteria cells in lakes in spring is described. The method applies physical, biological and chemical methods in an integrated and synergistic manner and includes using flexible enclosures to close a control water area and using modified soil to adsorb and settle algal cells; coupling four technologies including algae control by fish, algae control by biological floating islands, algae inhibition by plants and algae control by microorganisms; and using H2O2 to kW algae and using 40% FeCl3+CaCO3 and 50% Ca(NO3)2 to treat sediment. The method establishes a complete system for physical, chemical and biological control of algae, forms joint control of exogenous contaminants, endogenous contaminants and cyanobacteria, integrates physical, biological and chemical methods and optimizes systematic methods that are used synergistically.

Abstract: Disclosed is a method for defining the stages of development of a cyanobacterial bloom, wherein the development of a cyanobacterial bloom is divided into five stages: a cyanobacteria wintering period, a resuscitation period, a rapid growth period, an outbreak period and a cyanobacteria decline period; the wintering period is defined based on the concentration/content ratio of algocyan/chlorophyll a; the resuscitation period is defined based on the relative expression levels of the phycocyanin synthesis gene PC-IGS, the algal toxin synthesis gene mcyA and the gas vesicle synthesis gene gvpC in the surface sediment; the cyanobacteria rapid growth period is defined based on the relative expression level of the ftsZ gene; the cyanobacteria outbreak period is defined based on the wind speed; and the cyanobacteria decline period is defined based on the relative expression level of the nblA gene and the ratio of glucose to neutral polysaccharides in dissolved organic matter.

Abstract: An integrated method for clearance, collection and capture of internal pollutants and algae at the bottom of a lake include the following steps: selecting areas where the pollution level is high, and organic or inorganic particulate matter is prone to accumulation and carrying out trenching operations at the bottom of the lake to form a plurality of traps; and removing the sludge and algae inside the traps and clearing the sediment inside the traps, for subsequent internal pollution control when the surface-layer sludge on both sides of the traps almost fills up the traps. This method makes use of the hydrodynamic disturbances of waves formed by natural wind energy and lake currents to continuously transport sludge with a high pollution level and a small specific gravity and algae in the surface layer of the lake bottom, which are rich in organic debris, to artificially built traps.

Abstract: The invention relates to a comprehensive monitoring and data mining system and method for algae bloom of lake, wherein, the method comprises acquiring monitoring indicator data related to algae bloom of lake by three ways, i.e., remote sensing monitoring, automatic monitoring and manual surveying, and transmitting the acquired data to a data center by Internet; performing data backup and data preprocessing of the received data in the data center, including temporal interpolation, spatial interpolation and outlier determination and processing; transmitting the preprocessed data to a database for storage; performing computation of 3D numerical model of lake according to the data source stored in the database, assessing the risk of algae bloom of the lake to be monitored according to the simulation data of the numerical model, and displaying predictive warning information on algae bloom of the lake on a public platform.

Abstract: The present invention provides a method for systematically controlling rapid proliferation of cyanobacteria cells in lakes in spring. The method applies physical, biological and chemical methods in an integrated and synergistic manner and includes using flexible enclosures to close a control water area and using modified soil to adsorb and settle algal cells; coupling four technologies including algae control by fish, algae control by biological floating islands, algae inhibition by plants and algae control by microorganisms; and using H2O2 to kill algae and using 40% FeCl3+CaCO3 and 50% Ca(NO3)2 to treat sediment. The method of the present invention has established a complete system for physical, chemical and biological control of algae, forms joint control of exogenous contaminants, endogenous contaminants and cyanobacteria, integrates physical, biological and chemical methods and optimizes systematic methods that are used synergistically.

Abstract: A method for enhancing nitrogen removal by denitrification in a horizontal subsurface-flow constructed wetland, which includes three treatment steps of strain acclimation, strain screening and strain pouring. Firstly, the enrichment of aerobic denitrifying bacteria is achieved through acclimation culture, and the denitrification advantages of the strains are improved to obtain acclimated strains; meanwhile in the present technical solution, after obtained, the acclimated strains are screened for multiple times to remove aging strains and some strains incapable of performing denitrification from sludge and obtain strains truly having good denitrification effects as strains to be poured; and finally the strains to be poured as obtained by the screening is combined with a biocarrier to obtain an immobilized filler and thus prevent the strains from loss.

Abstract: The invention discloses a method for harmless treatment of cyanophytes and suspended solids accumulated in lakeside wetlands, comprising the following steps: first, adding a flocculant to a water body to be treated, so as to allow the flocculation of cyanophytes to accumulate in the surface layer of the water body, and settling the formed cyanophycean floc to the surface layer of sediments; second, adding a floc stabilizer to perform accumulation and compaction of the cyanophycean floc and stabilized treatment of the floc in the surface layer; finally, conducting further reoxygenation treatment on the bottom water body. The method of the invention can realize efficient and ecologically safe flocculation of accumulated cyanophytes at low cost and control odor compounds such as sulfides decomposed from flocculated cyanophytes, so as to provide a new method for harmless treatment of excess cyanophycean accumulation in eutrophic lakes.

Abstract: Method for determining volatile thio-ether compounds in offensive odorous sediment including: pre-treating a sediment sample, extracting volatile thio-ether compounds, separating and purifying the extraction supernatant in a solid phase extraction column, eluting with ethyl acetate, and finally collecting the eluent, which is then concentrated and used for determination by gas chromatography.