The invention provides a sewage treatment process with multiple operation modes and a sewagetreatment system, and belongs to the technical field of sewage treatment. Comprising a first reaction zone, a second reaction zone and a third reaction zone which are used for sewage denitrification and / or dephosphorization and are carried out in sequence, and nitrification liquid treated in the third reaction zone flows back to the first reaction zone; switching among a dephosphorization priority mode, a dephosphorization and denitrification balance mode or a denitrification priority mode is carried out by controlling a nitrification liquid reflux ratio to adjust ORP (oxidation reduction potential) and / or DO (dissolved oxygen) of the first reaction zone. According to the sewage treatment process with the multiple operation modes, different operation modes can be flexibly adjusted and switched in the same sewage treatmentsystem according to different incoming water qualities, extremely high biological denitrification and / or biological phosphorus removal efficiency can be obtained by controlling the reflux ratio of nitrification liquid to adjust ORP and / or DO, and the investment and treatment cost can also be greatly reduced.
This application discloses a grey water reuse treatment device, including a filtration mechanism, a reuse water tank, and a waste tank. The upper end of the filtration mechanism has a grey water zone A, which is connected to the drain outlet of a washbasin via an inlet pipe. The middle part of the filtration mechanism has a clean water zone B, which is connected to the reuse water tank via a filter suction pipe and a backwash suction pipe. The end of the filtration mechanism has a wastewaterdischarge zone C, which is connected to the waste tank via a wastewaterdischarge pipe. The grey water reuse treatment device provided by this application can effectively improve the service life of the filter by backwashing, eliminating the need for frequent filter element replacements and reducing maintenance costs. Simultaneously, the addition of a bactericide inhibits the growth of microorganisms.
This application discloses a RAID request and response method, a data storage system, and an apparatus, relating to the field of computer technology. By dividing the RAID logical space into a foreground area and a background area according to the progress of background tasks, and determining the target response strategy for the RAID request based on the intersection of the target area of the RAID request to be responded to with the foreground and background areas, the foreground area's target response strategy is used to respond to the RAID request when there is no conflict between the RAID request to be responded to and the background task. This eliminates the need for striping locks and improves request response efficiency. When there is a conflict between the RAID request to be responded to and the background task, it is further determined whether the background task meets the preset request splitting conditions. If it does, it is split to prioritize responding to the part of the request that does not conflict with the background task, further improving request response efficiency.
The utility model discloses an ultrathin portable advertising machine which comprises an installation body and a display body, and the installation body comprises a frame arranged on the outer edge of the display body and a back plate arranged on the rear side of the display body. The display body comprises an LED screen, the front side face of the LED screen is coated with a waterproof layer, and the front side of the waterproof layer is exposed to the outside. Thus, the front side face of the display body (LED screen) is subjected to glue sealing treatment, so that the waterproof effect is achieved, a protection plate can be omitted, the thickness of the frame can be reduced, the thickness of the whole advertising machine is thinner, and the thickness of the advertising machine can be further reduced by arranging the concave part in the back plate to place the electric appliance box.