Beijing Drainage Group Co., Ltd

Beijing Drainage Technology Co., Ltd

Beijing Huijun Technology Co., Ltd.

Shujun Zhang

Yong Jiang

Jiawei Wang

Yongqing Gao

Fangbo Bao

Xiaoyu Han

Qiang Wang

Tong Li

Jing Chang Huang

Yao Liu

Shuai Zhang

Lixin Sun

Jianming Huang

Yu Bai

Wei Fu

Gangxin Chen

Xueying Su

Xiaocong Wang

Jiatong Jiao

Dan Zhao

Bingyu Zheng

The present disclosure belongs to the technical field of sewage treatment, and discloses a method and system for enhanced culture of aerobic granular sludge. The system includes a reaction tank, a water inlet and outlet unit, an aeration unit, and a sludge discharge unit. The water inlet and outlet unit includes a water inlet pump, a water inlet electric valve, a liquid flowmeter, a sewage uniform distribution treatment device, buffers, a water drainage pipe, and a water drainage electric valve. The aeration unit includes a blower, microporous aerators, and a gas flowmeter. The sludge discharge unit includes sludge discharge pumps, a sludge discharge pipe, a sludge discharge electric valve, and a sludge concentration meter. In the present disclosure, a multi-point uniform water distribution method is used. When the flow rate of influent water is adjusted, sewage slowly and uniformly flows through a sludge layer from the bottom of the system, so that the concentration of organic matter in raw water is prevented from being rapidly reduced by rapid single-point water intake, the utilization rate of the organic matter in the sewage is increased to the maximum extent, and the efficiency of the system is improved.

Method and system for enhanced culture of aerobic granular sludge

The present invention belongs to the technical field of sewage denitrification. Disclosed are a sewage treatment system and method of continuous flow step-feed short-cut denitrification-anaerobic ammonia oxidation coupled with denitrification. The system comprises a primary sedimentation tank, a bioreactor and a secondary sedimentation tank, which are connected in sequence, wherein the bioreactor comprises a pre-starvation zone, a first hypoxic zone, a first aerobic zone, a second hypoxic zone and a second aerobic zone; an agitator is arranged in each of the pre-starvation zone, the first hypoxic zone and the second hypoxic zone; an aeration device is arranged in both the first aerobic zone and the second aerobic zone; a polyurethane sponge filler is arranged in both the first hypoxic zone and the second hypoxic zone; and a nitrification liquid reflux pump is arranged between the first aerobic zone and the pre-starvation zone. By rationally utilizing a carbon source of raw sewage, the present invention develops a sewage denitrification system and a process control method which have the advantages of an efficient denitrification effect, a simple procedure flow, being convenient in terms of operation and maintenance, and being automated and intelligent.

Sewage treatment system and method of continuous flow step-feed short-cut denitrification-anaerobic ammonia oxidation coupled with denitrification

A data processing method and apparatus. An implementation solution including: analyzing an encoding file of a video stream to obtain a target image frame set corresponding to the encoding file and target quantization parameters corresponding to the target image frame set, a target quantization parameter being quantization parameter of a target image frame when the target image frame meets a quality evaluation index; one the basis of a comparison result of the target quantization parameters corresponding to the target image frame set, the encoding file and initial quantization parameters of image frames of the video stream, determining new quantization parameters of the target image frames in the target image frame set and new bit numbers of the target image frames corresponding to the new quantization parameters; and updating the initial quantization parameters and the initial bit numbers of the image frames of the video stream.

Data processing method and apparatus

A video transcoding method includes: decoding a source video stream to obtain a first video frame and decoding information, and inserting watermark information into the first video frame to generate a second video frame; determining types of macroblocks in the second video frame based on the watermark information and the decoding information; for each macroblock, determining target encoding parameters required for encoding the macroblock based on the type of the macroblock and a rate distortion optimization (RDO) algorithm; and performing macroblock coding according to the target coding parameters of each macroblock, so as to generate a transcoded target video stream.

Video transcoding method and apparatus, and electronic device and storage medium

A sewage uniform distribution treatment device for an aerobic granular sludge system and a use method therefor, the device comprising a reactor tank body (), a water inlet device (), and a water outlet device (). The water inlet device () comprises a water inlet inner channel (), a water inlet weir (), a water inlet outer channel (), a vertical water inlet branch pipe (), and vertical bell mouths (); the water outlet device () comprises a water outlet main pipe (), a water outlet channel (), a water outlet weir (), an outer baffle plate (), and an inner baffle plate (); the water outlet channel is connected to the water outlet main pipe; the outer baffle plate is a vertical baffle plate; the inner baffle plate is located at the bottom of the water outlet channel and is connected to the water outlet channel.

Sewage uniform distribution treatment device for aerobic granular sludge system and use method therefor

Provided are an anaerobic ammoxidation synergistic nitrogen removal process device of municipal sewage main and side streams and an application method thereof, comprising a municipal sewage raw water tank (), a biological reaction pool (), a secondary sedimentation pool (), a sludge digestion solution raw water tank () and a sludge digestion solution AOB strengthening pool (); wherein, the municipal sewage raw water tank () is connected with a water inlet valve () of the biological reaction pool () through a water inlet pump () of the biological reaction pool (); the biological reaction pool () is connected with the secondary sedimentation pool () through a secondary sedimentation pool connection pipe (); the sludge digestion solution raw water tank () is connected with a water outlet valve () of the sludge digestion solution raw water tank () through a water inlet pump () of the sludge digestion solution raw water tank (); the sludge digestion solution AOB strengthening pool () is connected with an anaerobic ammoxidation region compartment of the biological reaction pool through a sludge-water mixture reflux pipe () and a sludge-water mixture reflux pump (). It has the advantages of reasonability in structure design, convenience in operation, low running and maintenance cost, relatively low energy consumption, no need of an additional carbon source and the like, it can realize that short distance nitrification of municipal sewage is more stable, and it is high in low-temperature, water quantity and water quality shock resistance and can further increase volumetric load at the same time.

Anaerobic ammoxidation synergistic nitrogen removal process device of municipal sewage main and side streams and application method thereof

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Beijing, China

Shujun Zhang