A Constructed Wetland System for Treating Mariculture Sewage

Abstract

The invention discloses an artificial wetland system for treating marine aquaculture sewage. The artificial wetland system disclosed by the invention comprises a wetland pool body, wetland substrate filling, wetland plants, carbon source filling and a granulated microorganism inoculation bacterium agent, wherein the wetland substrate filling is composite filling composed of red bricks, cement bricks and coastal wetland sediment at a quantitative ratio; the wetland plants are mangrove plants; the carbon source filling is plant biomass wastes; the granulated microorganism inoculation bacterium agent is granulated sludge; the duration of a starting phase of an artificial wetland is 1 to 30 days and the hydraulic load at an operation phase of the artificial wetland is controlled to be 0.1ton / square meter / day to 10ton / square meter / day. The system disclosed by the invention can be used for treating various types of aquaculture sewage and the problems in the prior art that the activity of the wetland plants is inhibited, the salinity has interferences on adsorption and removal of phosphorus and antibiotics, the reduction capability of total nitrogen is not enough and the inoculation bacterium agent is lost can be effectively solved. The artificial wetland system disclosed by the invention has the advantages that a preparation technology is simple, the cost is low and large-scale industrial production can be realized.

Description

technical field [0001] The invention relates to a sewage treatment system, in particular to an artificial wetland system for mariculture sewage treatment. Background technique [0002] Since the reform and opening up, the scale of development in the coastal areas of mainland China has continued to expand. However, with the rapid economic development, the damage to the ecological environment in coastal areas has become increasingly significant, and the pollution caused by mariculture has become one of the incentives. This is mainly because the demand for seafood in the mainland consumer market is increasingly strong, and relying solely on ocean fishing is far from being able to meet market demand. Especially after fully realizing the importance of marine resource protection, seafood has a greater role in social supply. Rely on the development of the mariculture industry. For example, the statistical data released by the Fujian Provincial Bureau of Statistics pointed out that...

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Problems solved by technology

Among them, the scientific and technological bottlenecks and difficulties are mainly reflected in the following aspects: (1) The salt content of mariculture wastewater is relatively high. Although traditional classic wetland plants (such as reeds) have certain salt-tolerant characteristics, they are not effective in the actual treatment and application process. It has been proven that there are problems such as low activity and weak phytoremediation, which will definitely affect the diversity and stability of microbial communities in ecological processes, making it difficult to achieve the best purification ability of the process, and affecting the aesthetics of the process environment; ( 2) my country's marine aquaculture industry is still in the development stage. The construction and operation costs of high-energy purification technologies (such as activated sludge process, membrane treatment technology and physicochemical technology) are unaffordable, and the related technical capacity reserves are obviously insufficient, so it is impossible to reasonably and effectively solve the above-mentioned problems. process management control

Under this current situation, ecological engineering technology has strong practical application performance in the process of mainland mariculture sewage treatment, but how to further reduce the antibiotic resistance in sewage and process system microorganisms while improving the treatment effect of traditional pollutants in sewage? The absolute and relative content of sex genes has become a hot issue in the academic circle; (3) my country's mariculture process is still dominated by an open model, which leads to a large impact on the aquaculture environment by regional precipitation and temperature, resulting in a large amount of sewage pollution discharge load. Large fluctuations, the imbalance of the ratio of organic matter and nitrogen seriously interferes with the purification effect of total nitrogen

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