I want to build a pig farm with an annual output of 10,000 heads. I don't know how to deal with sewage.

I have already answered this question to others, and you may find it.

From the sewage treatment technology, it is usually: grit chamber (very important, carefully designed, with conservative parameters, because there are a lot of pig manure, and the manure residue can be recovered)-> hydrolytic acidification (or UASB)->; AO (or contact oxidation, SBR), etc. This sewage treatment process is professional, so you'd better find a professional sewage treatment company to do it. It must be very difficult for a person to do it well. The equipment and structure are complex, so non-environmental professionals should not try to do it themselves.

Of course, if you have a lot of land and want to engage in comprehensive production and operation, there is no need to engage in too complicated sewage treatment facilities, which is costly, troublesome and uneconomical to manage.

I'll give you an eco-economic reference suggestion:

I saw a pig farm with a stock of 8000 ~ 1. 1 000 in Dalang Town, Dongguan. The south of the pig farm is adjacent to Shenzhen Luotian Reservoir (one of Shenzhen's water source reservoirs). They use technology based on natural oxidation pond, which is a traditional oxidation pond designed by civil engineers in their village. From the point of view of environmental engineering, this technology is the one with the least investment and the most convenient management, but it takes up more land. But the water is good enough to enter the drinking water reservoir. I visited their factory twice in 2005 and 2008.

Their water treatment process of "grit settling+hydrolysis+three-stage oxidation pond oxidation" is very ecological, and the basic process is as follows:

First of all, the pig water first passes through the grit chamber, which is very large and handles feces. Then enter a simple hydrolysis acidification tank, which is actually a tall sewage tower with water at the bottom, water at the top and mud bucket at the bottom. There is no special requirement for effluent, mainly to provide water head. In fact, this hydrolytic acidification tank is not standardized. Let's make a biogas digester. The biogas digester technology is not too deep. All provinces have professional environmental protection companies or biogas equipment companies to do it, and they can also recycle biogas for cooking and heating. What should be paid special attention to here is that no matter what structures are made to deal with these manure residues, we must pay attention to the equipment and measures for sludge discharge and slag discharge, because the wastewater from piggery washing contains a huge amount of manure residues, which cannot be cleaned manually, so it is best to make a grit chamber and use some equipment to clean it (with economic value). I suggest that it is better to precipitate first and then enter the biogas digester. One is to recover manure residue, and the other is to reduce the organic load of biogas digesters. Please reduce the cleaning pressure of biogas digester.

Then enter the oxidation pond-the residence time of oxidation pond is about 100 hour, which is divided into four levels, each level is a fish pond, and different fish are raised at different depths, and the water quality is also different.

The residence time of the primary oxidation pond is designed as 24 hours, and the depth is 1 m ~ 1.5 m, and the sewage will become the fertilizer for fish. The purpose of this trip is not to raise fish, but to raise some small fish for geese and ducks in the pond.

At present, all the sewage in this pig farm has been treated, and there is basically nothing to do except clean up the feces. Harvest a large number of fish, ducks and geese every year. There are common grass carp and pond fish that like rich water and rotten water.

It is worth noting that there are a lot of water hyacinths in the second pond. Water hyacinth is used to raise ducks, but its practice is simple wetland, which is one of the natural ponds of artificial wetland. The residence time should be about 24 hours.

The overall effluent is very good. Needless to say, Shenzhen Luotian Reservoir dares to enter (although it is prohibited by law, the treated water quality is very good, and it flows down the mountain like a clear spring, which really has no effect on the water quality of the reservoir. I have measured the water quality.

This factory is easy to find. If you are interested, you can go to Dalang Town, Dongguan. At the southernmost tip of Dalang Town in the southern tip of Dongguan, there is a hill near Luotian Reservoir in the north of Shenzhen. This pig farm is halfway up the mountain. The famous local pig farm in Dalang Town is known as the "Ten Thousand Pig Factory". There are many vehicles pulling swill on the road. ?

Attached is a photo I took at that time. Only one photo can be uploaded. This is a corner of the first-class oxidation pond in their pig farm, and ducks and geese can be seen next to the oxidation pond.

If you are not a professional sewage treatment engineer, you'd better find a more professional environmental protection company to make a design for you. There are many kinds of sewage treatment processes, and pig manure water is considered as a better sewage treatment method. As long as it is an environmental protection company with a little professional experience, it can do well. If you have a lot of land at home and are located in the south, you can consider using the ecological method I recommend to treat this sewage, which is very convenient, cheap and saves a lot of management worry. The sewage is almost treated, and it can be discharged into the municipal sewer if it is not treated clearly. At present, the environmental protection companies are mixed, so it is generally best to consult the local environmental protection companies in this province, and it is best to look at their successful cases, so that you can do it with confidence. The quotations of environmental protection companies are basically realistic, and the operating costs are imaginary figures. If you plan to develop for a long time, you might as well consider the post-treatment scheme of oxidation pond I gave you. This process is very cheap and ecological, and will benefit from long-term stability. If you do it temporarily, you can actually find an environmental protection company to do it for you. Environmental protection companies adopt UASB, contact oxidation or SBR process. I estimate that if the operation is not done properly, it will inevitably be very bad. Management and maintenance are very troublesome and high-tech. You should recruit at least one undergraduate in environmental engineering to take care of these processes, equipment and facilities for you.