Artificial light source adjusting method utilizing chlorella to purify pig manure waste water

Abstract

The invention belongs to the technical field of environmental engineering and particularly relates to an artificial light source adjusting method utilizing chlorella to purify pig manure waste water. The artificial light source adjusting method comprises: utilizing the pig manure waste water to serve as nutritional matrix for cultivating chlorella, enabling a light-emitting diode (LED) lamp with a specific wavelength to serve as an artificial light source, performing adjustment with step-changing illumination intensity, and promoting growth of chlorella economically and efficiently so as to improve pig manure waste water purifying effect. Compared with ordinary methods utilizing fixed illumination intensity, the artificial light source adjusting method can save luminous energy massively and improves economic benefits of utilizing the chlorella to purify the pig manure waste water. The artificial light source adjusting method is good in practicability, simple and practicable.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to an artificial light source adjustment method for purifying pig manure wastewater by using chlorella. Background technique [0002] With the rapid development of my country's economy and society, my country's aquaculture industry has also developed rapidly. In 1998, there were more than 1,000 large and medium-sized livestock and poultry farms in the suburbs of Shanghai; the number of large-scale pig farms in Hefei, Anhui reached 150,000; There are more than 20 of the above, and there are also large-scale large-scale pig farms with a breeding scale of more than 100,000 heads. While large-scale breeding provides urban residents with abundant meat, eggs, milk and their products to meet people's daily needs, it also poses a serious threat to the environment. In 2002, my country's industrial solid waste was only 945 million tons, while the production of ...

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Problems solved by technology

Due to the complexity of the nature of farm wastewater, it is rare to use only anaerobic process

At present, the reactors used in the wastewater treatment of farms generally have the disadvantages of low treatment efficiency, small organic matter volume load, and long hydraulic retention period.

The low treatment efficiency will increase the operating cost of the aerobic treatment unit in the later stage; the sludge generated by the aerobic treatment needs further treatment and disposal; the increase of the hydraulic retention period will increase the effective volume of the reactor, increase equipment and equipment, These have greatly affected the economical practicability of existing treatment methods

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