31results about How to "Reduce aeration costs" patented technology

The invention relates to a ceramic membrane chemical cleaning system and method which are used for cleaning a ceramic membrane in a water treatment system. The chemical cleaning system comprises an online cleaning part, wherein the online cleaning part comprises a dosing pump and a sucking pump; the dosing pump is coupled onto the ceramic membrane arranged in a membrane pool by virtue of a pipeline, so as to inject a cleaning liquid into the ceramic membrane; the sucking pump is coupled onto the ceramic membrane by virtue of a pipeline, so as to discharge water from a back absorption membrane of the ceramic membrane; and the cleaning liquid on the ceramic membrane is discharged into the membrane pool in a sucking process. The system and method which are provided by the invention can be used for solving the problems of pollution of the ceramic membrane in a water treatment process, production of secondary pollutants by the cleaning liquid in a membrane cleaning process, secondary treatment of the membrane cleaning liquid, and the like.

The invention provides a step-feed multistage A / O-MBR processing method for oil shale retorting waste water, and comprises the following steps: (1) the oil shale retorting waste water is introduced with a step-feed multistage A / O-MBR processing system; the waste water is divided into three portions and enters into three anoxic pools respectively; (2) denitrification reactions are carried out in each anoxic pool; (3) waste water enter into each aerobic pool, and nitrosation reactions and nitrification reactions are carried out in each aerobic pool; (4) the waste water enters into a membrane bioreactor; (5) clear water generated after filtering by the membrane module is discharged, and a retained sludge mixed liquor returns to the first anoxic pool. According to the invention, oxygen-limited aeration is carried out in the first aerobic pool and the second aerobic pool, thereby realizing short distance nitrification; by means of step-feed, COD in the original water can be fully utilized for denitrification, thereby reducing external carbon source adding amount and mixed liquor reflux ratio, and reducing aeration cost and denitrification required carbon source.

The invention discloses an iron-and-manganese removing device based on microorganisms and a microorganism filtering method. The device comprises a first submersible pump, an aeration pool, a microorganism filtering device, a second submersible pump, a back washing pool, a clean water pool, a water storage box and an aeration device. The first submersible pump is arranged between the aeration pool and an underground well, the aeration pool is provided with the aeration device, the aeration device comprises an air compression pump and an aeration disc which are connected through an aeration pipe, and a lifting device is arranged at the upper end of the aeration disc; the aeration pool is sequentially connected with the microorganism filtering device, an outlet tee joint is arranged at the lower end of the microorganism filtering device and is respectively connected with the back washing pool and the clean water pool, and the second submersible pump is arranged between the back washing pool and the outlet tee joint; the microorganism filtering device comprises a top cover, a filtering column, a bottom cover and a transversely-moving cart, the top cover, the filtering column and the bottom cover are connected from top to bottom and are detachably connected, and the transversely-moving cart is used for supporting the filtering column; the water storage box is connected with an overflowing pipe at the upper portion of the filtering column.

The invention discloses a wastewater treatment method, and specifically in particular relates to an upgrading treatment method for a sewage treatment plant in a park based on a membrane coagulation reactor-ozone-biological activated carbon technique. The method comprises the following steps: introducing wastewater of the park after pretreatment to an MCR (Membrane Chemical Reactor) system to befor treatinged, so that the turbidity of contributed water is less than or equal to 0.5NTU (Number of Transfer Units) and accords with some other indexes; then, oxidizing the contributed water of the MCR system in an O3 oxidizing system; introducing the contributed water of the O3 oxidizing system to a BAC (Basic Aluminum Chloride) system, and remaining the water treated in the BAC system for 1-5 hours; and thoroughly decomposing pollutants in wastewater through synergistic effect of activated carbon adsorption and micro-biological degradation, and so that the contributed water stably contributing water to meets the discharge demands. The method disclosed by the invention has the advantages that the operational stability of the system is improved; ozone tail gas is used for aeration of the BAC system, so that the tail gas treatment problem is solved; the aerating efficiency of the BAC system is improved; the system is in modular configuration, is automatically controlled and strong in maintainability.

The invention relates to a panel air lift circulation type photosynthetic microorganism culture device. A box is composed of a supporting part and a glass panel installed on the supporting part. Multiple reactor units sequentially connected in series are arranged in the box. Every two adjacent reactor units are separated through a connecting baffle installed on the supporting part. At least one aerating device is installed on the bottom in each reactor unit. One guide plate installed on the glass panel is arranged above each of the two ends of each aerating device. Each aerating device in each reactor unit communicates with a gas inlet tube. Gas enters the reactor units through each aerating device. A liquid outlet is formed in the bottom of each reactor unit. A glass cover plate provided with ventilation holes is connected to the top of the box in a sealed mode. A gap exists between each connecting baffle and the glass cover plate, and every two adjacent reactor units communicate with each other through the corresponding gap. The panel air lift circulation type photosynthetic microorganism culture device has the advantages that the cost is low, temperature control and cleaning are easy, energy consumption is low, photosynthetic efficiency is high, and the service life is long.