37results about How to "Solve the problem of insufficient carbon sources" patented technology

The invention provides a method for advanced denitrification and dephosphorization through an aerobic phosphorus uptake and half shortcut nitrification coupled anaerobic ammonia oxidation double-granule sludge system, belonging to the field of biological sewage treatment. The system comprises a raw municipal sewage tank, an A/O-SBR reactor, an Anammox-SBR reactor, a PLC control box and a computer. The method comprises the following steps: firstly allowing municipal sewage to enter the A/O-SBR reactor, carrying out anaerobic phosphorus release reaction, and controlling DO to be less than 0.2 mg/L; after the reaction is completed, starting aeration, then carrying out aerobic phosphorus uptake and half shortcut nitrification, controlling nitrification process through the output of the computer; after the reaction is completed, carrying out standing and sedimenting, allowing drained water to enter the Anammox-SBR reactor, and carrying out anaerobic ammonia oxidation reaction; and after the reaction is completed, carrying out standing, sedimenting and draining, then collecting concentrations of effluent ammonia nitrogen and nitrite nitrogen, and adjusting reaction time according to the concentrations. The method provided by the invention gives full play to the advantages of granule sludge and autotrophic denitrification; and through online real-time control, system operation is optimized; degree of automation is high; controllability is good; and advanced denitrification and dephosphorization of low C/N domestic sewage can be realized.

The invention discloses an ultrasonic-assisting nitrogen and phosphorus removing process. The ultrasonic sludge treatment is additionally arranged at the tail end of a secondary settling tank or a concentration tank, and ultrasonically-treated sludge reflows to an anaerobic tank, an anoxic tank or an SBR (Sequencing Batch Reactor) tank. By adopting an ultrasonic sludge treatment technology and utilizing that residual sludge or concentrated sludge reflows to an anoxic section after the ultrasonic radiation treatment, the invention successfully solves the problems of insufficient carbon sources in the biological nitrogen and phosphorus removing process, greatly reduces the operation cost, and achieves the aim of enhancing biological nitrogen and phosphorus removal.

The invention relates to a method for lowering an ammonia load in a leachate treatment biochemical system. The method comprises the steps that 1, raw water containing high ammonia nitrogen is pumped into an ultrafiltration component to be subjected to ultrafiltration treatment, and ultrafiltration liquid is sent to an acid-base regulating tank; 2, base is added into the acid-base regulating tank,stirring is conducted, and water quality regulation treatment is conducted; 3, clear liquid obtained after water quality regulation treatment is conducted is subjected to impurity removal treatment bymeans of a sand filter through fine filtration; 4, microfiltration liquid is sent into a heat exchanger for heat exchange, after heating is conducted, the microfiltration liquid is conveyed into a multistage ammonia removal membrane component for ammonia removal treatment, and waste water obtained after degassing is sent into an MBR membrane bioreactor for biochemical treatment. Accordingly, theproblem that high ammonia nitrogen leachate is high in ammonia load, insufficient in carbon source and large in nitrification liquid reflux ratio and tank volume in the MBR biochemical treatment process can be solved, ammonia removal is assisted through a degassing membrane ammonia removal method, the running cost is lowered, and MBR biochemical system decarburization and denitrification can run stably.

The invention provides a device and method for deep denitrification of domestic sewage through the combination of intermittent-aeration-mode simultaneous nitrification and denitrification with short-range denitrification anaerobic ammonium oxidation, belonging to the field of biological treatment of sewage. The device comprises an excess sludge fermentation cylinder, a sludge-water separator, a raw water tank, an intermediate water tank, two sequencing batch SBR reactors, an air compressor, a peristaltic pump, and the like. The method comprises the following steps: add domestic sewage into thefirst sequencing batch reactor, and removing all the ammonia nitrogen and the most of total nitrogen through simultaneous nitrification and denitrification in an intermittent aeration mode; and allowing discharge water of the previous step and sludge fermentation broth obtained after sludge-water separation to enter the second sequencing batch reactor, and removing left nitrite and nitrate nitrogen through coupled short-range denitrification-anaerobic ammonium oxidation so as to eventually realize deep denitrification of domestic sewage. The device and method of the invention are applicable to low-C/N urban domestic sewage, and can reduce aeration amount and energy consumption, homogenize the concentrations of organic matters in the domestic sewage, slow down the consumption speed of organic matters, improve nitrogen removal efficiency and realize recycling of excess sludge.

The invention discloses a rural domestic sewage treatment system and method. AO and A2O process selections can be provided according to inlet water quality conditions and outlet water requirements, and the aeration rate of an aerator at the bottom of an adjustable aerobic tank is changed through frequency conversion control, so that the adjustable aerobic tank is converted into a combination of ananoxic tank and an aerobic tank, and process conversion is realized. Fixed fillers are arranged in the anaerobic tank and the anoxic tank, and suspended fillers are arranged in the aerobic tank. Therural domestic sewage treatment system is small in occupied area, small in civil construction work amount, short in period, low in investment, easy and convenient to operate and maintain, low in professional requirement degree, capable of remotely monitoring water quality and controlling equipment operation, capable of achieving unmanned operation and maintenance and suitable for being used and popularized in rural area sewage treatment.

The invention relates to a serial composite fixed biofilm and activated sludge autotrophic denitrification apparatus on the basis of continuous flow AAO phosphorus removal and partial denitrificationand a method thereof and belongs to the technical field of biological disposal of urban sewage. According to the method, a main process consists of four parts including an urban sewage original watertank, a continuous flow AAO phosphorus removal and partial denitrification device, an intermediate water tank and a composite fixed biofilm and activated sludge autotrophic denitrification device. Through process adjustment, remaining short-range sludge in a back-end autotrophic denitrification reactor is continuously refluxed into an AAO reactor through a sludge circulation system under the condition that basic characteristics of phosphorus accumulating bacteria serving as the main organism population in the AAO reactor are not destroyed, so that the front and back sections both have a denitrification effect, and the size of the reactors required for disposing unit volume of wastewater is further reduced. At the same time, NOB in the autotrophic denitrification reactor can be effectivelyelutriated under the conditions of high temperature, low oxygen content and low sludge age, so that the short-range effect is more stable. Finally, energy-saving, efficient and stable nitrogen and phosphorus removal of the system is realized.

The invention discloses an improved A/O-MBR integrated device and a sewage treatment method thereof. The improved A/O-MBR integrated device comprises an aerobic tank, an anoxic tank and an MBR membrane tank, wherein the aerobic tank is isolated from the anoxic tank by a partition board; muddy water circulation channels are arranged at the upper end and the lower end of the partition board; aerators are arranged in the aerobic tank; a sewage inlet is formed in the aerobic tank; an impound outlet pipeline is arranged on a membrane component of the MBR membrane tank; the anoxic tank is separatedfrom the MBR membrane tank by means of a baffle; slopes at the bottoms of the aerobic tank, the anoxic tank and the MBR membrane tank form a bucket-shaped tank bottom; and an aerated mud discharge pipe is arranged at the lowest part of the tank bottom. Through the adoption of the device, the problems of insufficient carbon source, nitrate delivery obstacle and the like in the traditional A/O-MBR device are solved, and the sewage purifying efficiency is effectively improved; the deposited activated sludge is guided at the position of the aerated mud discharge pipe, and is fed in the reaction area of the aerobic tank through aeration of the aerated mud discharge pipe, so that the activated sludge utilization rate is improved, sewage is pumped away from the aerated mud discharge pipe by a sewage pump in necessity; and the sewage treatment method of the integrated device is simple to operate, and the sewage purification degree is high.

The invention aims to provide a method for treating circulating cooling sewage of a power plant, and belongs to the technical field of sewage treatment. The method comprises the following steps: preparing a carbon source and an oxygen removal agent; adding the carbon source and the oxygen removal agent into water to be treated and mixing fully; enabling a water sample to be treated into a biological filter unit; filtering by adopting up-flow type continuous flow; performing aerating in an upper and middle section of volcanic rock filler of the biological filter unit; preparing a flocculating agent; adding the flocculating agent into outlet water of the biological filter unit, and mixing; adding the flocculating agent and mixing again; enabling the outlet water to pass through a sand filter unit, and discharging the outlet water. According to the method, saturated dissolved oxygen in the circulating cooling sewage is effectively removed; a proper carbon nitrogen ratio is adjusted through the externally added carbon source, so that the problems of insufficient carbon source and poor biodegradability of the circulating cooling sewage are solved. The method disclosed by the invention is simple and high in efficiency, facilities automatic control, and can be combined with other circulating cooling sewage treatment processes to realize compressive treatment of the circulating cooling sewage.

The invention discloses an intermittent aeration and membrane biological integrated water treatment device which comprises a biochemical pool, a membrane treatment pool, a water pump, a submerged aerator, an air pipe, a control valve, a sludge pump and a sludge return pipe. The water pump is connected with the biochemical pool and used for pumping sewage to be treated into the biochemical pool, the submerged aerator is placed into the biochemical pool and externally connected with the air pipe, the control valve is mounted on the air pipe and connected with a controller for controlling intermittent opening of the control valve, the membrane treatment pool is connected with the biochemical pool through a pipeline, a membrane bioreactor is arranged in the biochemical pool, two ends of the sludge return pipe are connected with the membrane treatment pool and the biochemical pool, and the sludge pump is mounted on the sludge return pipe. Nitrogen and phosphorus removal effects of sewage and wastewater biochemical treatment can be remarkably improved, and sewage and wastewater treatment energy consumption can be effectively reduced.

The invention discloses an in-situ sewage and odor treatment device for a sewage treatment plant. The in-situ sewage and odor treatment device mainly comprises an odor collection system, an odor conveying system and an odor treatment system; the odor collecting system consists of an odor collecting hood, an air pipe and a first fan; the odor conveying system consists of a pipeline and a second fan; the odor treatment system separates the anoxic tank by using a partition plate; the tank is divided into a front selection tank area and a rear anoxic tank area, the front selection tank has three different structures, odor can be dissolved by adopting a proper scheme according to different conditions, and nitrate-containing sewage and sulfur-containing and ammonia-containing odor are treated insitu by virtue of a synchronous denitrification and desulfurization and anaerobic ammonia oxidation reaction mechanism. The treatment device is simple, the manufacturing cost is low, the thought is novel, sulfide and ammonia in the municipal sewage treatment plant are used for reducing nitrate while odor of the municipal sewage treatment plant is removed, the requirement for denitrification in sewage is met, waste is treated with waste, the input amount of a carbon source and the yield of residual sludge are reduced, and good ecological benefits are achieved.