استفاده از پودر كربن فعال در فن آوري لجن فعال جهت بررسي اثر تصفيه پذيري فاضلاب صنعتي پتروشيمي در مقياس آزمايشگاهي جهت پالايندگي آب برگشتي

Use of activated carbon powder in activated sludge technology to investigate the effect of wastewater treatment Petrochemical industry on a laboratory scale for water purification

ﺑﻪ ﻣﻨﻈﻮر ﺗﻌﯿﯿﻦ وﯾﮋﮔﯽ ﻫﺎي دو ﺳﯿﺴﺘﻢ ﺗﺼﻔﯿﻪ ﻓﺎﺿﻼب ﺑﻪ روش ﻟﺠﻦ ﻓﻌﺎل، ﻫﻮادﻫﯽ ﮔﺴﺘﺮده و اﻓﺰودن ﭘﻮدر ﮐﺮﺑﻦ ﻓﻌﺎل ﺑﻪ واﺣﺪ ﻫﻮادﻫﯽ در ﻣﻘﯿﺎس آزﻣﺎﯾﺸﮕﺎﻫﯽ و ﻣﻘﺎﯾﺴﻪ ﻋﻤﻠﮑﺮد آﻧﻬﺎ در ﮐﺎﻫﺶ ﺑﺎر آﻟﯽ ﻧﺎﺷﯽ از ﺑﻨﺰن و اﺗﯿﻠﻦ دي ﮐﻠﺮاﯾﺪ در ﻓﺎﺿﻼب ﻣﺼﻨﻮﻋﯽ ﻣﻘﺎﯾﺴﻪاي ﺻﻮرت ﮔﺮﻓﺖ؛ و دو ﺳﯿﺴﺘﻢ ﮐﻪ ﯾﮏ ﺳﯿﺴﺘﻢ ﺑﺎ اﺳﺘﻔﺎده از ﭘﻮدر ﮐﺮﺑﻦ ﻓﻌﺎل و ﺳﯿﺴﺘﻢ دﯾﮕﺮ ﺑﺪون اﺳﺘﻔﺎده از ﭘﻮدر ﮐﺮﺑﻦ ﻓﻌﺎل ﻣﯽﺑﺎﺷﺪ در ﻣﻘﯿﺎس آزﻣﺎﯾﺸﮕﺎﻫﯽ ﺑﺎ ﺣﺠﻢ ﻫﻮادﻫﯽ 9ﻟﯿﺘﺮ و واﺣﺪ ﺗﻪ ﻧﺸﯿﻨﯽ 4ﻟﯿﺘﺮ ﻃﺮاﺣﯽ و ﺳﺎﺧﺘﻪ ﺷﺪ. ﺑﺎ اﺳﺘﻔﺎده از ﯾﮏ ﻓﺎﺿﻼب ﻣﺼﻨﻮﻋﯽ ﺑﺎ ﺗﺮﮐﯿﺐ ﺷﯿﻤﯿﺎﯾﯽ ﻣﻌﻠﻮم ﻣﺒﺘﻨﯽ ﺑﺮ ﺑﻨﺰن و اﺗﯿﻠﻦدي ﮐﻠﺮاﯾﺪ ﺑﺎ ﻣﯿﺰان COD ﺑﯿﻦ 300 ﺗﺎ 1100 ﻣﯿﻠﯽﮔﺮم ﺑﺮ ﻟﯿﺘﺮ، دو ﺳﯿﺴﺘﻢ ﻓﻮق ﺑﻪ ﻣﺪت 6 ﻣﺎه ﻣﻮرد ﺑﻬﺮهﺑﺮداري ﻗﺮار ﮔﺮﻓﺘﻨﺪ. در دوره ﺑﺮرﺳﯽ، ﺑﺎزدﻫﯽ ﮐﺎﻫﺶ و ﺣﺬف ﻣﻮاد آﻟﯽ و ﺗﻐﯿﯿﺮات ﻣﻮاد ﺟﺎﻣﺪ ﻣﺨﻠﻮط و ﻧﯿﺰ ﻣﻮاد ﺟﺎﻣﺪ ﻣﻌﻠﻖ ﻓﺮار ﻣﺎﯾﻊ ﻣﺨﻠﻮط در ﻫﺮ دو ﺳﯿﺴﺘﻢ در ﺷﺮاﯾﻂ ﻣﺨﺘﻠﻒ ﺗﻐﯿﯿﺮ ﻏﻠﻈﺖ ورودي ﻫﻤﺮاه ﺑﺎ ﺛﺎﺑﺖ ﻧﮕﻪداﺷﺘﻦ ﻣﻘﺪار ﭘﻮدر ﮐﺮﺑﻦ ﻓﻌﺎل اﯾﺮاﻧﯽ ﺑﻪ ﻣﯿﺰان 2500ﻣﯿﻠﯽ ﮔﺮم ﺑﺮ ﻟﯿﺘﺮ و زﻣﺎن ﻣﺎﻧﺪ ﻫﯿﺪروﻟﯿﮏ و ﺟﺎﻣﺪات ﺑﻪ ﺗﺮﺗﯿﺐ ﺑﺮاﺑﺮ ﺑﺎ 18ﺳﺎﻋﺖ و 15روز ﺻﻮرت ﮔﺮﻓﺖ. ﯾﺎﻓﺘﻪﻫﺎي ﺣﺎﺻﻞ از اﯾﻦ ﭘﮋوﻫﺶ ﻧﺸﺎن ﻣﯽدﻫﻨﺪ ﮐﻪ ﭘﻮدر ﮐﺮﺑﻦ ﻓﻌﺎل اﻧﺘﺨﺎﺑﯽ ﺑﺮاي ﺟﺬب اﺗﯿﻠﻦ ديﮐ ﻠﺮاﯾﺪ و ﺑﻨﺰن در ﺑﺎرﻫﺎي 400و 700ﻣﯿﻠﯽﮔﺮم ﺑﺮ ﻟﯿﺘﺮ ﻧﺴﺒﺖ ﺑﻪ ﺑﺎرﻫﺎي 900و 1100ﻣﯿﻠﯽﮔﺮم ﺑﺮ ﻟﯿﺘﺮ ﺑﻬﺘﺮ ﻋﻤﻞ ﻧﻤﻮده اﺳﺖ. ﻫﻤﭽﻨﯿﻦ ﻣﺸﺨﺺ ﮔﺮدﯾﺪ ﮐﻪ اﺳﺘﻔﺎده از ﭘﻮدر ﮐﺮﺑﻦ ﻓﻌﺎل در ﺳﯿﺴﺘﻢ ﺑﺎ ﭘﻮدر ﺑﺎﻋﺚ ﻧﺎﺳﺎزﮔﺎري ﺳﺮﯾﻌﺘﺮ ﺳﯿﺴﺘﻢ ﻧﺴﺒﺖ ﺑﻪ ﺳﯿﺴﺘﻢ ﻟﺠﻦ ﻓﻌﺎل در واﺣﺪ ﻫﻮادﻫﯽ، ﻣﯿﺰان ﻣﻮاد ﺟﺎﻣﺪ ﻣﻌﻠﻖ ﻓﺮار، ﻣﺎﯾﻊ ﻣﺨﻠﻮط و ﻣﻮاد ﺟﺎﻣﺪ ﻣﻌﻠﻖ ﻣﺎﯾﻊ ﻣﺨﻠﻮط ﺑﻬﺘﺮ از ﺳﯿﺴﺘﻢ ﺑﺪون ﭘﻮدر ﮐﺮﺑﻦ ﻓﻌﺎل ﻣﯽﺑﺎﺷﺪ. در ﺻﻮرت اﻓﺰاﯾﺶ درﺻﺪ ﺣﺬف CODدر ﺳﯿﺴﺘﻢ، ﻣﯿﺰان ﻣﻮاد ﻓﻮق ﻧﯿﺰ اﻓﺰاﯾﺶ ﭘﯿﺪا ﻣﯽﮐﻨﻨﺪ.

In order to determine the characteristics of two wastewater treatment systems by activated sludge method, extensive aeration and addition of activated carbon powder to aeration unit on a laboratory scale and compare their performance in reducing the organic load caused by benzene and Ethylene dichloride in synthetic wastewater The above two systems, one system using activated carbon powder and the other system without activated carbon powder, were designed and built on a laboratory scale with an aeration volume of 9 liters and a sedimentation unit of 4 liters. Using a synthetic wastewater with a known chemical composition based on benzene and ethylene dioxide with a COD between 300 and 1100 mg/l, the above two systems were operated for 6 months. Efficiency of reduction and removal of organic matter and changes of mixed solids as well as suspended solids of volatile mixed liquid in both systems in different conditions of change of input concentration along with keeping the amount of Iranian activated carbon powder constant at 2500 mg/l and time Hydraulic retention and solids were equal to 18 hours and 15 days, respectively. The results of this study show that the activated carbon powder selected for adsorption of ethylene chloride and benzene at 400 and 700 mg /l loads performed better than 900 and 1100 mg/l loads. It was also found that the use of activated carbon powder in the system with the powder causes faster incompatibility of the system than the activated sludge system in the aeration unit, the amount of volatile suspended solids of mixed liquid and suspended solids of mixed liquid is better than the system without activated carbon powder. If the percentage of COD removal in the system increases, the amount of the above materials will also increase.