The decoloration properties of magnesium hydroxide,chitosan and magnesium hydroxide-chitosan complex flocculant for leather dyeing wastewater are discussed.The effects of pH value and chitosan dosage on decoloring efficiency are investigated.The results show that magnesium hydroxide-chitosan complex flocculant is superior to magnesium hydroxide or chitosan on decolorization.

In this paper,in order to achieve the objective of sustainable development in the region,the regional distribution of the total emissions of pollutants conducted a preliminary exploration,through the analysis of the various factors affecting them and,ultimately,for a particular formulation of regional development planning,the realization of sustainable development,provides a better distribution of the total emissions of pollutants.

The relation among energy,environment,economy and society is analyzed,based on which,social sustainable development model is established,the social optimal development route as well.It provides references for strategy decision of national and area development.The concept of sustainable development is going further,and the only social optimal development model is also put forward in the article.

This article has made the brief introduction to the waste water nature of both glutanic acid production and monoso-dium glutamate production, proposed in view of this kind of waste water evaporates the concentration + catalytic oxidation for the core government craft. The results prove that after process,the index of COD,BOD5 ,NH3-N in the waste water are up to The Glutanic Acid Production Pollution Control Standard (GB19431 -2004) ,the technical process is simple and feasible,with remarkable environmental and economic results,the result is obvious and has great prospect of application in reality. Introduced with emphasis the project actual movement,situation and the movement cost, and have carried on the brief analysis.