J.Env.Sci. Tech., Spring 2004, No.20
Amir Hossein Mahvi
Allah Bakhsh Djavid
Alireza Mesdaghi Nia
Key words: Wastewater, Industry, Textille, Wood , Paper , Tannery
Tehran as the capital of Iran has so many attractions which have resulted in problems such as industries centralization and increasing population in and around the city. Therefore, water demande has become ever increasing. It is important to notice that discharging untreated domestic and industrial wastewater into the groundwater has resulted in much pollution and raising there round water level. On the other hand , in recent years there was decreasing rainfall and so water shortage has been obvious. Therefore it seems an essential task to reuse and or recycle water in present industries.
In this study and among the established industries in Tehran, factories having fifty or more workers of textile , tannery, pulp and paper industries have been selected as the sample group . Most of the tanneries were transferred from Tehran city to the outside about 14.5% of total remained industries are related to textile , Pulp and paper manufacturing in the first phase of this study. The qualitative and quantitative characteristics of water used in these factories and possibilities for water recoiling have been investigated.
The results of study showed that the most consumption is related to textile industry. Water needed for all selected industries was brought about from tap water (11%), tap water and deep weels (11%) and deep weels (78%)
The amount of wastewater produced by textile, Wood pulp and paper and traines in Tehran area was about 21500m3 and considering 200 liters per capital of wastewater production, it would be equivalent to 107500 persons per day wastewater production.