31results about How to "Meet the requirements of effluent water quality" patented technology

The invention discloses a denitrified sewage treatment device for an artificial wetland. The device comprises a sewage treatment pond. The sewage treatment pond comprises a denitrification layer (3) and a soil layer (4), wherein the soil layer (4) is arranged above or below the denitrification layer (3); the length of the sewage treatment pond is greater than or equal to 1m and the length-width ratio is greater than or equal to 3; the sewage treatment pond is provided with a water inlet and a water outlet; plants are planted on the soil layer (4); and the denitrification layer (3) consists of sulfur particles, plant stem and leaf fragments and gravels. The invention further discloses a denitrified sewage treatment method. The denitrified sewage treatment device disclosed by the invention has the advantages of low cost and good denitrification effect of sewage.

A cold-tolerant pseudomonas strain Den-05 belongs to the technical field of the biological engineering and environmental engineering, and is Pseudomonas psychrophilia Den-05, which is preserved in China General Microbiological Culture Collection Center (CGMCC) on March 27, 2012 with the preservation number of CGMCC NO.5942. Low-temperature aerobic denitrifying bacteria Pseudomonas psychrophilia Den-05 is screened from the natural environment by a microbial pure culture technique, so that the preparation of a biological denitrifying bacterial agent is realized and a high-efficiency denitrifying bacterial agent is provided for a biological enhancement system; besides, the winter denitrification effect of an urban sewage plant is improved in the control and regulation way of shortening the period of aeration by shortening the anaerobic period and the removal of nitrate nitrogen under the aerobic condition is realized; as a result, the water quality discharged is capable of meeting the requirements.

The invention discloses a high-efficiency bioflocculant producing bacterium, relates to removal of a trace amount of pollutants which are produced in the city water supply and sewage treatment processes, and solves the problems of low yield of bioflocculant, low artificial regulation performance and single treatment substrate. A screening method comprises the following steps of: domesticating activated sludge of a municipal sewage plant in the Harbin, and enriching biological bacteria, diluting and culturing by using a shake flask, performing plate streaking, separating and purifying biological bacterium species, and repeatedly performing three-area streaking for multiple times to obtain the pure bioflocculant producing bacterial strain KlebsiellaSp.. By the bacterial strain, the removal rate of a trace amount of pollutants in municipal sewage can reach 67.82 percent. By the high-efficiency bioflocculant producing bacterium, the removal rate of a trace amount of pollutants in the municipal sewage is improved, and energy consumption in production is reduced.

The invention discloses a method for removing nitrates in water by a floc resin formed by reconstruction of a powder resin. The method comprises the following steps: the nitrate content in water is detected; if the nitrate content exceeds the standard, a coagulant is added to a flocculation tank and the powder resin is simultaneously added to reconstitute the coagulant and the powder resin to formthe resin floc; and the nitrates in the water are adsorbed by the resin floc in a precipitation tank, and after reaching adsorption saturation, the resin floc settles to the bottom of the tank to remove the resin floc from the water. Any equipment is not needed to add, when sudden nitrate exceeding the standard happens, treatment equipment of an original water plant is used, removal of the nitrates can be realized by adding the powder resin and increasing an addition amount of the coagulant in the water plant, and water quality requirements for outlet water are met.

The invention relates to a preparation and installation method of an anti-floating filter plate of an upward flow suspension filter material filter pool. The method is characterized by comprising the steps of assembling a mold to prepare the anti-floating filter plate and installing the anti-floating filter plate. The anti-floating filter plate comprises an anti-floating filter plate body of a rectangular reinforcing steel bar concrete plate structure. Upper and lower rabbets are formed at the opposite ends of the two side ends of the anti-floating filter plate. The cross section of the upper rabbet is in a dovetail groove shape, the cross section of the lower rabbet is in a dovetail shape matched with the dovetail groove shape of the upper rabbet, and two adjacent anti-floating filter plate bodies form a dovetail type plate slot through engagement of the upper and lower rabbets; a plurality of filter head sleeves are preformed in the axial direction of the anti-floating filter plate. The anti-floating filter plate has the advantages that the rabbet structure is adopted, the problem that formwork supporting is difficult in the plate slot construction process is solved, and the problems of water leakage, material leakage, difficult pouring and difficult formwork supporting are solved; the anti-floating effect is well achieved by taking full advantage of the weight of the anti-floating filter plate and the pressure relief effect of filter holes.

The invention belongs to the field of sewage treatment, and in particular relates to a method for deep treatment of refractory organic wastewater of a sewage treatment plant in a fine chemical industry park, which carries out deep treatment on secondary refractory treatment discharged water of the sewage treatment plant in the fine chemical industry park through a combined process of ozone catalytic oxidation and a biological aerated filter. With the method disclosed by the invention for processing secondary refractory treatment discharged water of the sewage treatment plant in the fine chemical industry park, the reaction efficiency in the ozone oxidation process is improved and biodegradability of the sewage is improved under economic dosage of the ozone; through treatment by the biological aerated filter adopting a low-energy consumption operation mode, chemical oxygen demand (COD) in the process discharged water can meet level-I B standard of chemical oxygen demand (COD) provided within Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002), and can satisfy effluent quality demand of existing secondary treatment process upgrading and reconstruction in the sewage treatment plant of the park under pollutant reduction and total amount control requirements.

The invention discloses an enhanced nitrogen and phosphorous removal integrated constructed wetland system. The system is a surface flow wetland, and comprises an emergent aquatic plant wetland (1) and a submerged plant wetland (2) which are sequentially arranged along the water flow direction, wherein the emergent aquatic plant wetland (1) comprises an enhanced nitrogen removal medium layer and a shallow-water surface (3) arranged at the upper part of the enhanced nitrogen removal medium layer; emergent aquatic plants (4) are planted in the enhanced nitrogen removal medium layer; the submerged plant wetland (4) comprises an enhanced phosphorous removal medium layer and a deep-water layer (6) arranged at the upper part of the enhanced phosphorous removal medium layer; and submerged plants (5) are planted in the enhanced phosphorous removal medium layer. The enhanced nitrogen and phosphorous removal integrated constructed wetland system can be used for realizing sewage treatment synchronously, efficiently and economically.

The invention discloses a multi-mode integrated biological reaction pool for nitrogen and phosphorus removal, the biological reaction pool includes a biological selection area, a pre-anoxic area, a main reaction area, a water distribution area, a water outlet area and an internal return channel; the main reaction The zone includes zone A, zone B and zone C; zone A can be used as an anaerobic zone or anoxic zone during operation, and zone B and zone C can be used as aerobic zone or anaerobic zone or anoxic zone during operation. The biological selection area is located at the front of the reaction tank, followed by a pre-anoxic area, the water distribution area is located between areas A, B, and C, the outlet area is located between areas B and C, and the inner return channel connects the outlet area and water distribution area. The nitrogen and phosphorus removal integrated bioreactor with multi-mode operation provided by the present invention has the characteristics of intensification, small footprint, and a small number of equipment. It can also operate in multiple modes alternately, with free and flexible mode switching, and impact load resistance. High-efficiency biological nitrogen and phosphorus removal can be achieved when the influent water quality changes greatly.