Great knowledge of sewage treatment in breeding farms

"We want not only green waters and green mountains, but also Jinshan and Silver Mountains. I would rather have green water and green mountains than golden mountains and silver mountains, and green water and green mountains are golden mountains and silver mountains. " -- Xi Jinping

The biggest headache for farms is the treatment of animal manure and sewage. If they are discharged at will, it will not only pollute the river and the environment, but also cause the stench inside and outside the farm, the cross flow of sewage, mosquitoes and flies, the spread of germs everywhere, the serious pollution of the animal growth environment, and the threat to the health of animals. animal safety is not guaranteed, animal quality is declining. It is precisely for this reason that many farms are inefficient, or go bankrupt, or are ordered by government departments to rectify or close down.

So how can we effectively treat farm sewage? How to make effective use of waste and turn waste into treasure without polluting the environment? In order to find the answer, the reporter came to Zhaobao Ecological Farm in Fujian Province, which is famous for wildlife ecological breeding.

As soon as I walked into the farm, I immediately felt relaxed and happy: because it was not like a farm at all, let alone a large farm with an annual output of millions of rare birds and wild animals. Surrounded by green trees and the fragrance of birds and flowers, it gives the impression of a holiday villa-all you see is green, what you smell is sweet-scented osmanthus and grass, and all you hear is the singing of birds. In this country-famous special wildlife farm, you can't see any sewage or smell anything bad. How does Zhaobao Farm do this?

1. Ecological recycling technology.

Ecological recycling is a mode of agricultural production strongly advocated by the state, and it is also the direction of agricultural development in the world. Lan Zhaoyan, chairman of Zhaobao Farm, realized the importance of ecological recycling to farm production development and environmental protection as early as 1995, so he looked through a large number of eco-technical materials in the world. combined with his own practice to establish a unique ecosystem of breeding and planting recycling.

The system includes scientific and reasonable water supply and drainage system, biological deodorization technology, biogas digester, sewage treatment pond, plant plantation and so on. The specific principle is that the animal manure and sewage produced by breeding enter the biogas digester to ferment into biogas energy. The biogas residue and biogas liquid of the biogas digester are used to irrigate fruit trees, forage grass, corn, vegetables, flower seedlings and other plants, and forage grass, corn and vegetables are used to feed animals.

2. Treatment and utilization of sewage

Although animal manure is basically used in the biogas digester, the sewage from flushing the animal enclosure still needs to be treated. The farm has set up five purification and sedimentation tanks, which add biological agents to deodorize the sewage, then precipitate one by one, and finally enter a large pond full of water hyacinth, which has well-developed roots, which can purify the sewage and make it clear. When the purified water is stored to a certain amount, it will naturally flow out of the water pipe and irrigate the forage grass and sweet-scented osmanthus trees around the reservoir. The treated water basically meets the second-level discharge standard set by the state. Water hyacinth can also be used to feed wild boars and other animals, it can be said that everywhere is treasure.