Wastewater treatment in slaughterhouses requires a series of treatment steps, each of which results in effluent effluent. Due to the particularity of the slaughtering industry, wastewater contains a large number of impurities and suspended solids, and the concentration of total nitrogen and total phosphorus is also relatively high. Therefore, the following points need to be paid attention to when selecting slaughtering sewage equipment:
First of all, we need to choose integrated slaughtering sewage treatment equipment based on years of sewage equipment process research and years of practical experience in engineering. This type of equipment is widely used, especially for the treatment of wastewater in small slaughterhouses.
Secondly, the treatment of slaughtering sewage equipment is characterized by the fact that the first two tanks of the treatment process are sedimentation tanks, which are mainly used to precipitate impurities and sludge that have not been screened out in the sewage. The size of the pool is designed based on 3 times the daily emissions of the slaughterhouse. When the sewage flows through the sewage outlet into the sedimentation tank, it is first screened with two different mesh sizes to remove solid impurities. The impurities on the filter screen should be removed in time to ensure the smooth flow of water. At the top of the sedimentation tank, there is an entrance and exit that is convenient for management staff to go up and down. At the same time, it is necessary to set up a sludge discharge port, and the sludge must reach a certain thickness before it can be completely removed during sedimentation.
Among them, the aeration tank is divided into adsorption section and degradation section, which can be mainly used for static and aeration, first make the precipitated sewage anaerobic for two days, and then aeration before discharge, so that the water and air can be fully understood and contacted, and the sewage treatment can be effectively purified. The size of the tank is the same as the capacity of the sedimentation tank. The external blower is placed in the pool, and the blowing pipe is connected, and the other end of the pipe is placed in an aeration basin to continuously blow air into the pool, which plays the role of aeration and oxygenation. A drain valve is set at the bottom of the aeration tank, and when the sewage has been aerated for a few days, the drain valve is opened. It can be used to irrigate farmland or discharge into the municipal pipe network.
In addition, the ordinary anaerobic pond can effectively reduce the concentration in the slaughtering wastewater, but it cannot treat the foul odor generated in the anaerobic process and the foul odor of the slaughtering wastewater itself, which limits the popularization and application of ordinary anaerobic ponds. Therefore, we need to further study the treatment process of anaerobic reactor to make it more effective.
By comparing and analyzing various aerobic and anaerobic treatment methods and methods, combined with the characteristics of water quality and water discharge of small slaughterhouses (points), it is more practical to choose an integrated slaughtering sewage treatment process with low cost, simple operating system, convenient operation, management and maintenance to treat slaughtering sewage, and it is easier for users to accept