Method for constructing cultivation sewage sequencing batch circular treatment and recycling system

Abstract

The invention relates to a method for constructing a cultivation sewage sequencing batch circular treatment and recycling system. The method comprises the following steps of: a, arranging other ponds which are heavily polluted aside a crab cultivating pond serving as a central action pond, so that water between the ponds and the crab cultivating pond is convenient to discharge mutually; b, planting various kinds of native submerged plants in the crab cultivating pond to construct an efficient repair ecological system; and c, in the intermitted idle period of the crab cultivating pond, injecting cultivation sewage aside the ponds into the crab cultivating pond sequentially in batches according to the sequence of catching time of different aquatic products and the pollution degree of water quality to be purified, and recycling directly. The method has the advantages that: a stable purification system in which an in-site model, an ex-site model and a cultivation model are combined; an ex-site repair pond for purifying the cultivation sewage can be used for developing the aquaculture of aquatic economic animals, and water resources and land resources are saved simultaneously; a virtuous circle ecological system is constructed by the crab cultivating pond, and the cost is reduced; and the 'zero discharge' of the crab cultivating pond is realized, a process is simple and short, the running cost is low, and secondary pollution is avoided.

Description

technical field [0001] The invention relates to the field of terrestrial aquaculture, in particular to a method for constructing a batch-type circulation treatment and reuse system of aquaculture sewage. Background technique [0002] Terrestrial aquaculture has serious problems such as single species, low quality aquatic products, environmental pollution and waste of water resources. During the breeding process, problems such as excessive feeding, excessive use of drugs, and degradation of the pond ecosystem have caused water quality to deteriorate and nutrient-rich substances to be discharged in large quantities, especially nitrogen, phosphorus, and permanganate from various types of aquaculture sewage such as fish ponds and turtle ponds. The concentration of pollutants such as salinity index is very high, causing serious pollution to the water environment, causing a series of changes in the ecological environment, and even destroying the functions of the water ecosystem. A...

AI Technical Summary

Problems solved by technology

[0004] At present, for the treatment of aquaculture sewage, various purification treatment systems are generally installed around the ponds, and Chinese patent application numbers 200610054026. Purification pools (such as plant filter pools, Ulva algae pools, and nitrification filter pools, etc.) are set up on the periphery to achieve purification, but there are many structures, high costs, long purification cycles, and high energy consumption for operation

Chinese patent application number 200610059750.1 is to raise the culture wastewater at the bottom of the center of the culture pond to another tank for the separation of suspended organic matter and natural photochemical catalytic oxidation treatment. The treatment process is cumbersome and difficult to popularize.

Chinese patent application No. 200910037024.3 involves ozone, machinery, biology, and liquid oxygen conversion water, etc. There are many processing equipment and the construction cost is expensive

Constructed wetland is a new kind of sewage treatment technology, which has a good effect in purification and treatment of aquaculture sewage. However, the constructed wetland system has poor stability, short operating life, low hydraulic load and pollution load, and occupies a large area, which is easy to cause secondary pollution.

Chinese Patent Application No. 200710051740.8 is composed of fish ponds, artificial wetlands and ditches. The wastewater from aquaculture fish ponds is purified through special artificial wetlands and ditches. The function of the wetland is single.

And in order to achieve an effective purification effect, a larger floor area is required

Chinese patent application No. 200910194931.9 involves multi-stage purification devices such as biological purification channels, artificial wetlands and clay ceramsite water purification devices. The steps involved are cumbersome, the cycle is long, the cost is high, and the scope of application is small.

However, there is no report on the construction method of a batch-type circulation treatment and reuse system for aquaculture wastewater that can achieve zero discharge of aquaculture wastewater and does not use any purification devices.