34results about How to "Solve secondary environmental pollution" patented technology

A technological method for comprehensively recovering rhenium-sulfur-arsenate mud containing rhenium-sulfur-arsenic acid by volatilizing rhenium-containing sulfur-arsenic acid mud by self-heating in a vortex furnace. In volatilization smelting, all the rhenate in the charge will decompose and volatilize, and the arsenic will be oxidized into As when the temperature of the exothermic oxidation reaction of the incoming charge rises above 1400°C and the oxidative combustion atmosphere 2 o 3 Steam, sulfur oxidation to SO 2 The steam enters the flue gas together; the high-temperature flue gas is enriched with rhenium and arsenic in the flue gas washing tower, and SO 2 Then enter the follow-up desulfurization tower to get rid of sulfur recovery. The method has high thermal efficiency, energy saving of more than 50%, and the direct recovery rate of high-value rare elements is about 10% to 30% higher, effectively saving precious resources, reducing the amount of waste residue by about 75% to 90%, and the waste residue is Ferrosilicon-calcium slag, which is non-toxic and available, completely solves the problem of secondary environmental pollution in traditional methods.

The invention belongs to the technical field of environment friendliness, relates to a sludge treatment process system and in particular relates to an environment-friendly riverway dredging and movable sludge concentrating and dewatering system. The environment-friendly riverway dredging and movable sludge concentrating and dewatering system is composed of an environment-friendly dredging unit, apretreatment unit, a sludge concentrating unit, a sludge conditioning unit and a sludge dewatering unit which are sequentially connected by pipelines. Riverway sludge is pumped on the pretreatment unit on the shore by the environment-friendly dredging unit in a riverway and is concentrated by the sludge concentrating unit after large-particle garbage and suspended matters are removed, so that theconcentration of the sludge is further increased; then, the riverway sludge is delivered into the sludge dewatering unit for dewatering after being homogenized and conditioned by the sludge conditioning unit; and finally, the conversion from the riverway sludge to clear water and mud cakes is finished. The system realizes the online flow operation of dredging, conveying and treatment of the riverway sludge; and meanwhile, the system has the characteristics such as good environment-friendly dredging effect, short process flow, high integration level and good movability.

The invention provides an energy-saving and environment-friendly method for treating urban sludge, which comprises mixing urban sludge with a moisture content of 70% to 85% and regulating materials in a certain weight ratio to form sludge fermentation materials, and then placing them in a vertical direction by Dynamic aerobic fermentation is carried out on a three-dimensional fermentation equipment consisting of 2 to 40 floors and 2 to 40 sets of belt conveyors in the horizontal direction, and biological dehydration and drying into decomposed and dry materials with a moisture content of less than 50% for further environmental protection treatment or resource utilization. The method of the invention is simple, and at the same time occupies a small area, has good fermentation effect, can avoid secondary pollution caused by odor, and achieves the goals of high efficiency and environmental protection.

The invention discloses a coated slow-release compound fertilizer and a preparation method thereof. The compound fertilizer comprises a urea nuclear as well as a wrapping layer and a hydrophobic layer which coat the urea nuclear from inside to outside, wherein the wrapping layer is formed by performing high-heat mixed melting on powdery nitrogen, powdery phosphorus and powdery potassium, and the powdery nitrogen in the wrapping layer accounts for 15%-25% of the total nitrogen in the coated slow-release compound fertilizer; the hydrophobic layer is made of resin. The coated slow-release compound fertilizer disclosed by the invention can meet nutritional requirements of crops in different stages, is low in cost and has an environment-friendly effect.

The invention provides a method for preparing an organic fertilizer from sugar mill mud. The method comprises the following steps: blending a certain proportion by weight of sugar mill mud having the moisture content of 60%-80% and a certain proportion by weight of adjusting material having the moisture content of 10%-70% to obtain a mud fermentation material having the moisture content of 50%-75%; next, putting the mud fermentation material on a three-dimensional fermentation apparatus composed of 2-40 layers and 2-40 groups of belt conveyors in the horizontal direction for dynamic aerobic fermentation, and after the mud fermentation material is converted into a decomposed organic material, directly applying the mud fermentation material as an organic fertilizer or an organic raw material for producing organic fertilizer products. According to the method, the sugar mill mud and bagasse can be effectively utilized, the fermentation effect is good, the floor area is small, and meanwhile, secondary pollution generated by stink can be avoided and the purposes of high efficiency and environmental friendliness are achieved.

The invention relates to a tray-type stereoscopic organic material fermenting system and method which are high in fermenting efficiency, low in cost and very environment-friendly. The fermenting system comprises tray filling equipment, a palletizer, a depalletizer and a tray overturning discharging machine which are mounted in sequence, as well as tray conveying equipment connected among the tray filling equipment, the palletizer, the depalletizer and the tray overturning discharging machine, and fermenting trays circularly flowing among the tray filling equipment, the palletizer, the depalletizer and the tray overturning discharging machine through the tray conveying equipment. The fermenting trays are filled with an organic material in the tray filling equipment, and are conveyed to the palletizer through the tray conveying equipment to be palletized into a tray stack, the aerobic fermentation of the organic material is realized in the fermenting trays palletized into the tray stack, the fermenting trays filled with the fermented organic material are conveyed to the depalletizer through the tray conveying equipment to be taken apart from the tray stack, then the organic material is conveyed to the tray overturning discharging machine through the tray conveying equipment, and is poured out from the fermenting trays, and the empty fermenting trays are conveyed back to the tray filling equipment through the tray conveying equipment.

The invention relates to a biological organic fertilizer and a preparation method thereof. The organic fertilizer is prepared from the following raw materials in parts by weight: (1) 50-80 parts of dewatered sludge, (2) 10-50 parts of protein waste slag, (3) 0-10 parts of urea, (4) 0-10 parts of activated carbon and (5) 0.2-1 part of functional strain microbial inoculum. The preparation method comprises the following steps: (1) preparing a functional strain; (2) fermenting the raw materials; and (3) performing post treatment. According to the invention, the problem of secondary environmental pollution caused by sludge generated in the mycelium CSTR (continuous stirred tank reactor) anaerobic fermentation, organic acid waste water EGSB (expanded granular sludge bed) anaerobic fermentation and aerobic treatment process and protein waste slag generated by organic acid factory microbial fermentation is solved; the waste is changed into valuable substances, thereby meeting the related requirements of circular economy; and the indices of the prepared biological organic fertilizer, such as the organic content, the active viable count and the like, meet the requirements of related industrial standards. Besides, the preparation method provided by the invention is simple and has the advantages of no discharge of three wastes, low investment, quick action and low cost.