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Q & A on the use of micro-organisms (I)


2. Aquaculture water pollution What are the characteristics? Aquaculture water treatment and repair of sewage and industrial wastewater and have even the difference? Aquaculture water pollution from the broad sense, including contaminants and breeding of exogenous self-pollution, from the narrow sense refers only to breeding self-pollution, usually referred to changes in the current water situation of many microbial products (EM bacteria, Bacillus,[link widoczny dla zalogowanych], etc.), how to select a suitable product for each user, is very important. In order to facilitate user understanding and use of microbial products, the company consolidated in 2003 users throughout the country to our questions, collate and analyze below for reference. 1. The concept of environmental remediation and what is the meaning? With the rapid development of modern biotechnology, microbiology and the traditional combination of modern biotechnology has greatly enhanced the effectiveness of biological degradation, degradation of expanded scope. Biologists use genetic engineering to the degradation of different gene transplants to the same strains, created with a variety of microbial degradation of the super functions. Chakrabarty 1970, the United States to Tong Lvse Pseudomonas (P.aemginosa) as a receptor, the Pseudomonas putida (P, puti ~) and so bring them into the various plasmids, constitute a variety of plasmids with The (super bacteria (for oil spill treatment. It has a degradation of straight chain aliphatic hydrocarbons, aromatic hydrocarbons, terpene hydrocarbons and polycyclic aromatic hydrocarbons in the ability of the general degradation of the natural environment after a year of the oil slick, with a Just a few hours to remove. Kulla, Switzerland in 1983 obtained by plasmid conjugation degradation of two dyes with the new strain. domestic Pat photosynthetic bacteria and yeast with a fusion of sub-monosodium glutamate wastewater treatment achieved good results. At present, bio-remediation Biological treatment technology known as a milestone, f recognized by the world environmental protection departments, and Pat causing concern in industry, bioremediation products and services is expected to average annual growth of 15%, on academic activities of bioremediation is also very active. culture environment on bioremediation research, at home and abroad has just started, but its prospects are very broad, as in the use of natural microbial degradation of organic pollutants in the culture environment, based on the use of modern biotechnology, genetic engineering bacteria build efficient, to efficient and rapid degradation of organic pollutants in the culture environment, so that contaminated Pat restoration of degraded ecological environment; screening of beneficial bacteria, through a separate acclimation, water for farming, making it the dominant bacteria, thereby inhibiting the propagation of pathogens, promote the culture of biological growth; screen culture water pollution is only the latter mainly refers to the breeding process by culture or by breeding technology and other reasons caused by water pollution. farming water pollution is characterized by a water main pollutant consumption oxygen and plant nutrients, pollutants, including COD, BOD, NH3, H2S, No one 2, and so on. These factors are mainly due to the high pollution density culture mode, excessive secretion of bait and the product of the existence of microbial metabolism and decomposition caused by the pollution consequences not only direct damage to the breeding biology,[link widoczny dla zalogowanych], and can lead to water body of oxygen, lead to outbreaks of disease, destruction of water microflora balance. farming water pollution water quality treatment and rehabilitation and industrial wastewater,[link widoczny dla zalogowanych], sewage treatment, as use of physical, chemical, and biological treatment, but culture water has its own characteristics,[link widoczny dla zalogowanych], its treatments and different from the industrial wastewater and domestic sewage. First, the culture water is mainly used for the production of bio-farming, the water treatment agent in the use of to ensure the safety of aquaculture organisms are harmless, and difficult to culture organisms in the environment and the accumulation and residue, so the physical and chemical treatment agent to use has some limitations, and industrial wastewater and domestic sewage treatment just to the final effluent to meet the state standards related to water, so the physical and chemical treatment agent of choices wide; Secondly, the nature of culture water pollutants relatively simple,[link widoczny dla zalogowanych], its not only harmful microorganisms and microbial growth are necessary nutrients. So the water quality of aquaculture good biodegradability, biological treatment works well, and industrial wastewater and domestic sewage are complicated, most of the microorganisms containing toxic ingredients, the BOD / COD less effective biological treatment of instability; Also, due to the limited features of the industry, aquaculture water pollution treatment and rehabilitation must take into account the cost, operability, etc., usually in situ (in place) restorations, and industrial wastewater and domestic sewage into the sewage treatment plant or may be a particular reactor deal, relatively speaking, than the cost of High technology is more complicated. At the same time, aquaculture water pollution restoration, not simply for the water quality, bottom sediment to be considered, mud water interface of various factors on the secondary effects of various factors integrated. biological treatment of water in aquaculture Remediation has obvious advantages and applications. (continued)