50results about How to "Save on medicine costs" patented technology

The invention relates to a method for treating high-concentration organic wastewater by anaerobic-aerobic deep coupling. The method comprises the following steps: introducing organic wastewater into an anaerobic reaction unit, and sufficiently mixing the organic wastewater with anaerobic granular sludge added into the anaerobic reaction unit in advance to perform anaerobic reaction; enabling anaerobic effluent obtained after anaerobic reaction to enter an aerobic reaction unit, and removing nitrogen through a synchronous nitrification and denitrification process; flowing part of effluent of the aerobic reaction unit back to the anaerobic reaction unit and fully diluting and mixing the part of effluent with the raw organic wastewater and granular sludge to carry out anaerobic reaction, andenabling the other part of effluent to enter a next treatment process or discharging the other part of effluent after reaching the standard. According to the invention, the anaerobic and aerobic reaction units are coupled to treat wastewater; anaerobic effluent enters the aerobic unit, the DO value in the water body of the aerobic unit is controlled, denitrification is effectively completed, thereflux ratio of the aerobic effluent is controlled, and the aerobic effluent returns to the anaerobic unit again, so that the ammonia nitrogen concentration in the anaerobic reactor is reduced, the activated sludge amount in the anaerobic reactor is ensured, and the anaerobic reaction efficiency is effectively improved.

The invention discloses a low-energy-consumption low-carbon-emission economical energy-saving urban sewage treatment method. The method comprises the steps that: 1, the to-be-treated wastewater is collected by a sewage pipe network and then is filtered by lattices, and is lifted by a pump to enter a pulse water distribution pot of a novel efficient turn-back anaerobic biochemical pool (ABR); 2, the swage subjected to the treatment in step 1 flows into a circulation-flow biological oxidization pool; 3 the effluent water from the step 2 flows into an artificial reinforced biological contact oxidization pool reconstructed by a water body from natural tunnels and reservoirs; and 4, the effluent water from the step 2 or the step 3 flows into constructed wetlands. After the sewage is treated by the above steps, the most pollutants in the water are effectively removed and the treated effluent water reaches the standard first-grade A in GB 18918-2002 ''Discharge standard of pollutants for municipal sewage treatment plant''. The energy-saving sewage treatment purification process with low cost, low energy consumption, low carbon emission and low operating cost is particularly suitable for the sewage treatment in small towns or rural areas.

Belonging to the wastewater treatment field, the invention discloses a method for simultaneous removal of nitrogen and phosphorus. The method for simultaneous removal of nitrogen and phosphorus includes the steps of: A. injecting wastewater containing nitrogen and phosphorus into a reactor; B. connecting a reference electrode, an electrochemical instrument and a cathode well; C. switching a change-over switch to an anode B, regulating the current and voltage of the electrochemical instrument, and using a magnesium alloy electrode as the anode B material; D. starting magnetic stirring to let scrap iron in a fluidized suspension state; E. adjusting the pH to weak alkalinity; F. turning on the power, and carrying out electrolytic reaction to remove phosphate and part of ammonia nitrogen in wastewater to obtain the product magnesium ammonium phosphate crystal; G. switching the change-over switch to an anode A, and maintaining other lines and the electrochemical instrument at an on-state; H. converting redundant ammonia nitrogen and nitrate nitrogen to nitrogen under the action of electrooxidation; and I. at the end of the reaction, turning off the power, discharging the supernatant, and then recovering the precipitate. The method provided by the invention can achieve simultaneous removal of nitrogen and phosphorus through simple switching of electrodes.