[Environmental ranking of industries located at west of Tehran based on the quantitative and qualitative characteristics of industrial wastewaters in 2011]

This is a descriptive and cross sectional study. The aim of this study was to investigate the environmental ranking of industries located at west of Tehran based on the quantitative and qualitative characteristics of industrial wastewaters in 2011. This study was conducted by site visit, questionnaire completion, database production and results analysis. The questionnaire was consisted of 30 questions about quantity, quality and management of industrial wastewater. Total number of industries with over than 50 personnel, was 287. Class-weighted sampling was used and the sample size was contained 50 industries. In this study, industries were scored from 1 to 10, based on the flow rate, BOD and COD, generation of wastewater per worker per day and then were ranked according to the total score. The average flow of wastewater generated by these 50 industries was 9422 m[3]/day. Wood and cellulose industries with 730 liters wastewater per worker per day was considered as the greatest wastewater generator. Minimum organic loading was related to non-metallic mineral industries with COD of 205 mg/ L and BOD of 85 mg / L. The maximum COD was related to paper industries with the rate of 8800 mg/ L and maximum BOD was related to food and drug industries with the rate of 1536 mg/ L. This environmental ranking was indicated that while paper industries contributed the most pollution load, non-metallic mineral industries had the least pollution load.

[Investigation of industrial waste management in industries located between Tehran and Karaj zone in 2009-2010]

In recent years, poor industrial waste managements have created many crises in human societies. The aim of this study was to investigate industrial waste management located between Tehran and Karaj zone in 2009-2010. This study is descriptive and sectional which was done by site visits, [Iranian environmental protection organization] use of questionnaires, database production and results analysis. The questionnaire consisted of 45 questions mainly about industrial waste; quantity, quality and management. Total number of industries with over 50 personnel's, calculated as 283. Class-weighted sampling was used in which the sample size contained 50 industries. Total generated industrial waste was 123451, kg per day. Major hazardous waste generated in industrial sections included: chemical and plastic making. About 45.28% of waste generated disposed by private sectors. Landfill with 62% and reuse with 17% were the first and second alternative of common methods for final disposal of solid waste in this zone. In order to reduce hazardous waste generation in this zone, reuse and recovery maximization of the waste must be noted in short-term. In long-term, some industries such as chemical-plastic and electronics which have high rate of hazardous waste production must be replaced with other industries with low rate production, such as wood-cellulose and paper industries

[Quantitative and qualitative investigation of industrial solid waste in industrial plants located between Tehran and Karaj]

Rapid population growth, industrial development, urbanization culture propagation and excessive material consumption are the most important factor which caused over increasing of municipal, industrial and agricultural waste in human society. Inappropriate disposal of generated waste in recent years created several environmental menace and crisis in human society. For investigation about existent situation of industrial waste generation questionnaire had been used. This questionnaire was catered by Iran environmental protection organization. Aforementioned questionnaire contained 45 questions about combination, quality and quantity of industrial waste. Total number of more than 50 personnel industry was 287. But sample contained 50 randomly selected industries. Gathered data have been analyzed with SPSS 18. Total generated industrial waste was 123451KG per day which had volume equal to 781 cubic meters per day. Generated waste capitation per every worker was 5.8 KG. Maximum frequency of industrial was related to machinery and equipment group which maximum generated waste was related to this industrial group too. Maximum hazardous waste was for inflammable waste with 34 weight percent. Major hazardous waste generating industrial was chemical and plastic making industry. Yielded result from this investigation has shown that significant relation existed between waste production rate and personnel number. The more personnel are, the more waste production increase