WSZ-AO domestic sewage treatment technology is an efficient biochemical water treatment technology that combines biotechnology and membrane technology. This technology is an efficient sewage treatment technology that combines biofilm and traditional sludge process. Due to the filtration effect of biofilm, organisms are trapped in the bioreactor, achieving complete separation of hydraulic retention time and sludge age, and maintaining a high MLSS in the bioreactor. Strong nitrification ability and high pollutant removal rate.
The application of hollow fiber inclined tubes replaces the secondary sedimentation tank in the activated sludge process for solid-liquid separation, effectively achieving the goal of sludge water separation. By fully utilizing the efficient interception effect of biofilm, nitrifying bacteria can be effectively intercepted and completely retained in the bioreactor, ensuring the smooth progress of nitrification reaction, effectively removing ammonia nitrogen, avoiding sludge loss, and intercepting large molecular organic matter that is difficult to degrade at the moment, prolonging its residence time in the reactor and maximizing its decomposition. After applying domestic sewage treatment technology, the removal rate of major pollutants can reach: COD≥93%，SS=99%。 The suspended solids and turbidity in the effluent are almost zero, and the treated water quality is good and stable, achieving the resource utilization of sewage.
2、 Advantages:
WSZ-AO domestic sewage treatment equipment is a living equipment that uses biofilm for sewage treatment and reuse. It has all the advantages of membrane bioreactor: good effluent quality, low operating cost, strong system impact resistance, low sludge volume, high degree of automation. In addition, as a living equipment, it has a small footprint and is easy to integrate. It can serve as both a small-scale wastewater reuse device and a core treatment unit for larger wastewater treatment plants. It is currently one of the hotspots in the field of sewage treatment research and has broad application prospects.
3、 Application areas:
Suitable for the treatment of domestic sewage in residential areas, office buildings, shopping malls, hotels, restaurants, government agencies, schools, military units, factories, and similar industrial organic wastewater, such as organic wastewater treatment in industries such as textiles, beer, papermaking, leather making, food, machinery, and chemical engineering.
4、 WSZ-AO domestic sewage treatment equipment effluent quality (for reference only):


category	Raw water quality (mg/L)	Treatment water quality (mg/L)	National Level One Emission Standard (GB18918-2002)	Water Quality Standards for Domestic Miscellaneous Water (CJ25.1-89)
				Toilet flushing, greening	Car wash and cleaning
BOD(mg/L)	150-250	＜10	20	10	10
COD(mg/L)	200-400	＜50	60	50	50
SS(mg/L)	150-250	＜10	20	10	5
Ammonia nitrogen (mg/L)	10-35	＜5	（8）15	20	10

Explanation: This device can be customized according to customer requirements.
5、 Process characteristics:
▲ Good effluent quality: Advanced membrane bioreactor technology is adopted, which makes the effluent quality of the system superior to traditional sewage treatment equipment in all aspects. The effluent quality is close to that of tap water in sensory perception and can be reused as reclaimed water.
▲ Small footprint: Due to the efficient separation effect of the membrane, there is no need to set up solid-liquid separation equipment such as sedimentation and filtration, no need for backwashing, and the concentration of suspended solids in the effluent is much lower than that of traditional solid-liquid separation equipment, making the entire system process simple, easy to integrate, and the system footprint greatly reduced.
▲ Save operating costs: Membrane bioreactors can filter out harmful substances such as bacteria and viruses, reduce disinfection equipment and daily dosage, making management and operation more convenient.
▲ The system has strong impact resistance and a wide range of adaptability: it prevents the loss of various microbial communities, which is beneficial for the growth of bacteria with slow production rates (such as nitrifying bacteria), prolongs the residence time of some large molecules that are difficult to degrade organic matter, and facilitates their decomposition, thus facilitating the smooth progress of various metabolic processes in the system.
▲ High degree of automation: WSZ-AO, due to the use of membrane technology, greatly shortens the process flow. Through advanced control technology, the equipment is highly integrated and intelligent, making it one of the most highly automated reclaimed water reuse equipment in China so far.
6、 Process flow of buried domestic sewage treatment device (product subject to actual conditions)

Process flow of buried domestic sewage treatment device (schematic diagram)


The above diagram is for reference only, and the specific design shall be subject to the actual situation

Process flow description:
The production wastewater is processed by a mechanical grid machine (optional, this equipment can be installed separately as needed) to remove larger floating and suspended solids before entering the regulating tank. The regulating tank is pumped to the primary sedimentation tank, which then flows into the hydrolysis and acidification tank. This process decomposes large organic molecules into small organic molecules and converts insoluble organic matter into soluble organic matter. As it enters the aerobic tank, the biodegradability of the wastewater is improved and oxygen efficiency is enhanced.
The water from the acidification tank flows automatically into the aerobic aeration tank, and the biochemical tank is equipped with hollow fiber packing, which has good elasticity, corrosion resistance, and is suitable for microbial biofilm formation. The biochemical pool can be equipped with a first level biochemical pool, a second level biochemical pool, or even multiple levels of biochemical pools as needed. The water from the biochemical tank flows into the sedimentation tank equipped with honeycomb packing, which has a special structure that makes it have good sedimentation properties. At this point, the sewage is separated into sludge and water in the sedimentation tank, and the effluent enters the clean water tank (if disinfection is required, users can perform disinfection treatment in this unit). The sludge then enters the sludge tank, and a portion of the sludge can be returned to the acidification tank or aerobic tank as needed, or pumped out. Fans are usually located outside of the equipment.
7、 Main technical parameters:
Main technical parameters (for reference only, can be customized)


model project		WSZ
		0.5		1		3		5		10		20		30
Processing capacity m/h		0.5		1		3		5		10		20		30
fan	model	HB-0.75				HB-1.1		HB-2.2		HB-4.4		HB-8.8		HB-11.5
	Power (KW)	0.75				1.1		1.2		4.4		4.4×2		11.5
water pump	model	40QW7-10-0.75				40QW10-7-0.75				50QW10-10-1.1		50QW25-7-1.5		50QW42-9-2.2
	Power (KW)	0.75-1.1										1.5		2.2
water intake	BOD5mg/L	150-400
effluent	BOD5mg/L
Floor Area (m)2）		4.5	6.5		12		15		35		51		76


8、 The superiority of WSZ-AO domestic sewage treatment equipment is mainly manifested in:
1. High removal rate of pollutants, strong resistance to sludge expansion, stable and reliable effluent quality, and almost no suspended solids in the effluent;
2. High degree of automation, capable of switching between automatic or manual control, simple operation, convenient management, and stable effluent quality for direct reuse. Low sludge volume reduces the cost of residual sludge treatment;
3. The process flow is simple, the structure is compact, under high volume load, the residence time is short, and the footprint is small;
4. Remove organic matter and ammonia nitrogen to improve the system's ability to withstand load shocks;
5. Low operating costs and no secondary pollution;
6. It can be buried underground according to the site arrangement, with parking or greening on top, greatly reducing investment.
9、 After sales service:
1. Product quality assurance: Our company's series of products undergo strict inspection before leaving the factory to meet the factory standards, and the quality assurance period is executed according to the contract provisions.
2. Our company guarantees that the technical materials delivered are complete, correct, and clear, fully capable of meeting the installation and technical requirements of Party A.
3. The main components of the equipment provided to you are original or patented products of the company, with brand new materials and excellent quality. It is a product that has passed the final inspection.
4. Free guidance on equipment installation, debugging, and operator training.
5. All devices are provided with lifelong technical support. Our company guarantees to provide vulnerable parts at cost price for a long time.
6. After receiving your feedback, we guarantee to provide a response within 8 hours. If the customer needs it, we will arrange experienced engineering and technical personnel to arrive at the site in the shortest possible time for analysis and guidance on repairs.
Slender: The use of this equipment - inoculation, bacterial cultivation, training and low load linkage, specific operations should be guided by engineering and technical personnel according to the actual situation.
Note: (1) Before using the equipment, please carefully read the instructions or follow the guidance of technical personnel.
(2) Due to varying amounts and properties of wastewater, there may be slight differences in product design. The actual situation shall prevail, and our company reserves the right to make technical changes.

(3) Due to continuous device updates, text changes will not be notified separately.