3results about How to "Promote harmlessness" patented technology

The application provides a composite material for sludge dewatering, a preparation method thereof and a sludge dewatering conditioner. The composite material for sludge dewatering comprises magnetic porous carbon and molybdenum disulfide loaded on the magnetic porous carbon, wherein the magnetic porous carbon comprises porous carbon and ferroferric oxide loaded on the porous carbon. The preparation method comprises the following steps: mixing the magnetic porous carbon with a molybdenum source and a sulfur source, and performing a hydrothermal reaction to make the molybdenum source and the sulfur source react to generate molybdenum disulfide; after the reaction is completed, performing solid-liquid separation, collecting the solid product, and calcining the solid product under an inert atmosphere at 350-450 DEG C to obtain the molybdenum disulfide magnetic porous carbon composite material; wherein the magnetic porous carbon comprises porous carbon and ferroferric oxide loaded on the porous carbon; and the composite material for sludge dewatering can construct a molybdenum disulfide magnetic carbon-based composite material with a large specific surface area, high catalytic activity and high universality, and the composite material can improve the sludge dewatering performance.

The application discloses a low-concentration formaldehyde waste liquid synchronous mortar modifier production equipment and belongs to the field of building materials. The low-concentration formaldehyde waste liquid synchronous mortar modifier production equipment comprises a mixing mechanism and two liquid storage mechanisms. The mixing mechanism comprises a mixing cylinder, a switching disc sealingly and rotatably connected to the top of the mixing cylinder and a partition plate installed in the mixing cylinder and located at the lower end of the switching disc. The partition plate divides the mixing cylinder into two cavities. Two liquid inlet pipes are arranged at the upper end of the mixing cylinder. One liquid inlet pipe is connected with one liquid storage mechanism. Two liquid through holes are arranged on the switching disc. According to the scheme, the formaldehyde solution is mixed with the formaldehyde waste liquid, the low-concentration formaldehyde waste liquid is applied in the synchronous mortar modifier, harmless and resourceful utilization of the formaldehyde waste liquid is facilitated, the comprehensive cost of products is reduced, and the competitiveness of the products is improved.

This invention discloses an apparatus and method for the electrochemical oxidation of ammonia nitrogen wastewater for complete nitrogen removal. The apparatus includes an equalization tank, an electrolytic cell, and a water storage tank connected sequentially via a liquid delivery pipeline. The electrolytic cell contains an anode and a cathode, which are respectively connected to an external power source via wires. The anode comprises a conductive substrate and a bimetallic single-atom catalyst supported on the conductive substrate. The cathode is selected from one of the following: Pt electrode, Cu electrode, stainless steel electrode, graphite electrode, and nickel electrode. This invention utilizes the bimetallic single-atom catalyst supported on the anode to directly remove ammonia nitrogen from wastewater through electrochemical oxidation. This method effectively achieves complete nitrogen removal without the need for other auxiliary devices, converting ammonia nitrogen in wastewater into environmentally friendly nitrogen gas, thus achieving resource recovery and harmlessness.