Studies On The Proliferation Of Photosynthetic Bacteria And Its Degradation Of Organophosphate Pesticides

Pesticides plays an improtant role in modern agriculture. At the same time some serious ecological problems are caused by pesticides,including soil pollution,water pollution and air pollution.Pesticides used in agriculture would produce residues of pesticides. When the concentration exceeds the permissive concentration,people will suffer from disaeses induced by toxic substances.Most countries in the world are faced with the problem of food safety related to remediation of pecticides. Congsequently, researches on the new methods for water and soil purification is developed in different ways,including physical,chemical and biological treatment.The advantages of biological treatment are nonpoisonous,with no residue and post-pollution.It`s a safe,effective,low-priced method to theredidues of pesticide with high density.Photosynthetic bacteria(psb) ,which appear firstly in the earth,could utilize light energy to grow.There are many processes that treating organic wastewater by psb or immobilized psb,but there are little research about this process to remove pesticides.This thesis about the degradation of pestide by psb in waste water. the feasibility and the effection of treatment are discussed.This thesis consists of 7 chapters.The first chapter is an introduction to the current situation of pollution induced by pesticides in our country,the classification of pesticide, and commonly used degradation methods; Chapter two is about organophosphates(OPS) degrading microorganism, including the kind , distribution , source of microorganism,influence factor to degradation, and mechanism of biodegradation;The introduction of photosynthetic bacterium and application, mainly the principle of dealing with waste water and application in...