Small integrated sewage Water treatment equipment Village specialty
The sewage enters the regulating tank through the grid and is lifted pump Enter the bioreactor, open the aerator for oxygenation through the PLC controller, the effluent of the bioreactor enters the membrane separation treatment unit through the circulating pump, the concentrated water returns to the regulating tank, and the membrane separated water enters the reclaimed water storage tank after chlorination and disinfection by the rapid mixing method (sodium hypochlorite, bleach, chlorine tablets). The backwash pump uses the treated water in the cleaning tank to backwash the membrane treatment equipment, and the backwash sewage returns to the regulating tank. The start and stop of the lift pump is controlled by the water level in the bioreactor. The filtration operation and backwashing operation of membrane unit can be controlled automatically or manually. When the membrane unit needs chemical cleaning operation, close the water inlet valve and sewage circulating valve, open the chemical cleaning valve and chemical circulation valve, start the chemical circulation pump, and carry out chemical cleaning operation.
Small integrated sewage treatment equipment village specialty Process description
WSZ-A equipment is mainly designed to treat domestic sewage and similar industrial organic sewage. Its main treatment method is to use the currently mature biochemical treatment technology - biological contact oxidation method. The water quality parameters are calculated according to the design of general domestic sewage quality, with BOD5 average 200mg/l and effluent BOD5 average 20mg/l. There are six parts in total: (1) primary sedimentation tank (2) contact oxidation tank (3) secondary sedimentation tank (4) disinfection tank, disinfection device (5) sludge tank (6) fan room, fan. It is discussed as follows:
(1) Primary sedimentation tank: the primary sedimentation tank of this equipment is a solid flow sedimentation tank, the rising flow rate of sewage in the sedimentation tank is 0.6-0.7mm/s, and the settled sludge is lifted to the sludge tank with air. (Note: WSZ-A0.5-5m3/h does not have a primary sedimentation tank)
(2) Contact oxidation tank: the water after initial sedimentation flows automatically to the contact tank for biochemical treatment. The contact tank is divided into three levels, with a total residence time of more than 4 hours. The contact oxidation time of enhanced equipment can reach 6 hours, filler It is a novel trapezoidal filler, easy to conjunctive, and non clogging. The specific surface area of the filler is 160m2/m3, and the air water ratio of the contact tank is about 12:1. (Note: WSZ-A0.5-5m3/h contact tank is secondary)
(3) Secondary sedimentation tank: the biochemical sewage flows to the secondary sedimentation tank. The secondary sedimentation tank is a parallel operation of two vertical flow sedimentation tanks, with an upward flow rate of 0.3-0.4mm/s. The sludge is discharged by air to the sludge tank. (Note: WSZ-A0.5-5m3/h sludge flows into the sludge tank automatically)
(4) Disinfection pool and disinfection device: the disinfection pool is 30 minutes according to the standard of "TJ14-74". If it is hospital sewage, the disinfection pool can increase the retention time to 1-1.5 hours. The disinfection method of contact dissolution of solid chlorine tablets is adopted, and the disinfection pool and disinfection device can be continuously changed according to the water yield
The dosage can be changed to achieve the purpose of adding more medicine with more water, and adding less medicine with less water. If other devices are required, they can be prepared separately. (Note: if it is used for industrial sewage, disinfection tank and disinfection device can not be used)
(5) Sludge tank: all the sludge in the primary sedimentation tank and secondary sedimentation tank is taken to the sludge tank of WSZ-A for aerobic digestion by air, and the supernatant of the sludge tank is added to the contact oxidation tank for further treatment. There is little residual sludge after digestion, which is generally cleaned once every 1-2 years. The cleaning method can be used to extend the fecal suction truck from the inspection hole of the sludge tank to the bottom of the sludge tank for suction and then outward transportation. (WSZ-A0.5-5m3/h sludge adopts anaerobic digestion)
(6) Fan room and fan: the fan room of equipment WSZ-A is located above the disinfection pool. The inlet of the fan room adopts double-layer sound insulation. The air inlet has * * * and fan filter, so there is no noise during operation. The fan adopts two L-type roots blowers, which can automatically operate alternately. The service life of a single fan is about 30000 hours.
Small integrated sewage treatment equipment village specialty The timely quotation of buried integrated sewage treatment equipment generally adopts natural film hanging. Compared with sewage treatment, the species and quantity of biofilm organisms are not very rich, but various microorganisms such as microbial micelles, protozoa, free bacteria and so on are growing, and the ecological situation is good. The biofilm is brownish black and gray. The microbiota is composed of capsulococcus. The protozoa include micro ciliates, sometimes bell worms, rotifers, dendrites, etc; Metazoan nematode, etc. There is algae symbiosis, and the biofilm at the inlet end is better developed than that at the outlet end. The biofilm development of all types of treatment equipment is similar with little difference. To judge whether the biofilm is mature or not, the removal rate of NH3-N or OC can be measured. When their removal rates are 75% or 15% respectively, it is considered that the biofilm is successfully formed. Table 2 shows that the time required for film formation is positively correlated with the water temperature. When the water temperature is 20 ℃, it takes about 18 days; When the water temperature drops by 10 ℃, the time required shall be doubled at least.
The equipment can be buried below the ground, and the ground can be used for greening or plaza, so the equipment does not occupy the ground area, does not need to build a house, and does not need heating and insulation. In addition to conventional blower noise reduction measures (such as heat insulation, silencer, etc.), new sound absorption materials are also set on the inner wall of the blower, so that the noise of the equipment during operation is less than 50 dB, reducing the impact on the surrounding environment. The equipment is equipped with a full-automatic electrical control system, and the equipment damage alarm system is reliable. Therefore, there is no need for special personnel to manage the equipment at ordinary times, only monthly and quarterly maintenance is required.
Small integrated sewage treatment equipment village specialty The equipment is composed of a secondary tank for sewage treatment, which is made of steel structure or Glass Steel structure with shallow burial depth. The steel structure pool is treated with domestic FRP anti-corrosion treatment, and the anti-corrosion life can reach 20 years.
Sewage treatment concerns thousands of households. In order to promote the implementation of projects in the field of people's livelihood, it is the first to fill the funding gap. Faced with the unfavorable situation of less original accumulation and great financial pressure in infrastructure construction and public services, Jinchuan District has continuously deepened the change of livelihood project investment system, innovatively adopted PPP mode to make up the gap in capital investment, accelerated the construction of projects in the livelihood field, and created a new path of PPP project construction with perfect system and mechanism, standardized project management, and effective risk prevention and control.
