Reclaimed water recovery treatment method and device

Abstract

The invention relates to a reclaimed water recovery treatment method and a device; the treatment method includes that: a first level biochemical treatment is carried out on waste water, and then precipitation is carried out, then a second level biochemical treatment is carried out and the water is recovered after sterilization; aeration is conducted in the first and the second biochemical treatment processes; the first level biochemical treatment adopts microporous Polymerized cellulose ether filler and the second level biochemical treatment adopts the biosorption method; and the sludge generated in the second level biochemical treatment process is flushed back to the first level biochemical treatment process. The device comprises an electric control system and a waste water treatment unit; the waste water treatment unit comprises a water collecting tank, a first level biochemical tank, a sedimentation tank, a second level biosorption tank and a sterilization tank which are sequentially connected; aeration devices are arranged in the first level biochemical tank and the second biosorption tank; the second level biosorption tank is communicated with the water collecting tank or thefirst level biochemical tank through a back-flushing pump. The reclaimed water recovery treatment method and the device are widely applicable to various reclaimed water recovery treatments.

Description

technical field [0001] The invention relates to reclaimed water reuse technology, in particular to a reclaimed water recycle treatment method and device with low operating cost. Background technique [0002] China is a water-scarce country, and its per capita fresh water resources only account for 1 / 4 of the world's available fresh water resources. With the further development of industry and the acceleration of urbanization, it is imperative to improve the utilization rate of fresh water resources. At present, many cities stipulate that in the process of community opening, reclaimed water must be reused. The water can be used for flushing toilets, greening, and landscape water, thereby increasing the number of times water is used and increasing the utilization of water resources. rate and reduce environmental pollution. Shenzhen, Beijing and other cities took the lead in proposing reclaimed water reuse, but many reclaimed water reuse systems failed to operate well after t...

AI Technical Summary

Problems solved by technology

[0003] First, the operating cost of reclaimed water treatment is too high. At present, the treatment cost of a ton of reclaimed water is about 1 yuan, plus management, it is difficult for customers to accept;

[0004] Second, in the treatment of reclaimed water, due to the high moisture content of the biochemically treated sludge, it is troublesome to transport the sludge, and the generated sludge is difficult to handle, which directly affects the cost of reclaimed water treatment

However, in actual use of the MBR process, there are disadvantages such as high investment costs, high operating costs, and inconvenient management.

In the use in Shenzhen and other places, the MBR process has a large workload for cleaning the membrane, and the membrane needs to be replaced frequently

Images