3results about How to "High ecological value" patented technology

This invention relates to the field of advanced wastewater treatment and biomass ash reuse, and discloses a method and system for removing trace pollutants from wastewater treatment plant effluent using biomass ash. The method is carried out in a system including an equalization tank, an ozone catalytic reaction tank, and a biochemical buffer tank, and includes: (1) introducing the effluent into the equalization tank for homogenization to obtain reclaimed water I; (2) introducing the reclaimed water I into the ozone catalytic reaction tank for ozone catalytic reaction to obtain reclaimed water II; (3) introducing the reclaimed water II into the biochemical buffer tank to contact with biofilm-coated microbial carriers for biochemical treatment to obtain effluent. The method provided by this invention can achieve efficient removal of trace organic pollutants from effluent, without the addition of chemical reagents, making it environmentally friendly and free from secondary pollution; at the same time, it can improve the biodegradability of the effluent.

The utility model provides a continuous operation system for recycling TMAH waste liquid in the semiconductor industry, which relates to the technical field of industrial wastewater treatment and comprises a primary purification subsystem and a deep purification subsystem which are connected in sequence, the primary purification subsystem comprises a first-stage filter, a second-stage filter and a third-stage filter which are connected in sequence; the deep purification subsystem comprises a raw material tank A and a raw material tank B, feed ports of the raw material tank A and the raw material tank B are connected with a discharge port of the preliminary purification subsystem, discharge ports of the raw material tank A and the raw material tank B are connected with an electrodialysis membrane stack, a TMAH purified liquid output port of the electrodialysis membrane stack is connected with the concentration adaptation subsystem, and a waste liquid output port of the electrodialysis membrane stack is connected with reflux ports of the raw material tank A and the raw material tank B and a TMAH waste liquid tank respectively; suspended photoresist is removed from the TMAH waste liquid through the primary purification subsystem, filtered liquid in the raw material tank A and the raw material tank B alternately enters an electrodialysis membrane stack for deep purification, and residual waste liquid is discharged. According to the utility model, zero discharge of hazardous waste in the TMAH waste liquid treatment process is realized, and photoresist can be completely recycled.

The utility model belongs to municipal engineering technical field, specifically is a kind of sponge city infiltration and drainage device, the middle part of the infiltration and drainage pipe is fixedly connected with drainage net pipe;The end of drainage net pipe is fixedly connected with water storage pool;The end of drainage net pipe close to water storage pool is fixedly connected with fixed frame;The middle part of fixed frame is fixedly connected with elastic rope;The middle part of elastic rope is slidably connected with two elastic balls symmetrically arranged;The middle part of elastic rope close to elastic ball is slidably connected with cleaning brush;The side wall of water storage pool away from drainage net pipe is fixedly connected with recovery pipe;Mud, leaf, etc. Sediment adhered to the inner wall of drainage net pipe can be effectively removed, to avoid causing the diameter of drainage net pipe to be reduced, resulting in the problem of reduced drainage capacity and local waterlogging due to blockage, to reduce the risk of urban waterlogging.