This video presents a conventional dual anthracite and sand filter being backwash with air followed by backwash water. The filter has an filtration area of 62.5 m2.
Hi! No it isn´t! The control of duration of filter backwash time is done visually. Usually, it takes from 8 to 12 minutes and it is controlled by the operator. Best regards!
@@SidneySecklerFerreiraFilho we can also use turbidity to control the water pump to stop water when turbidity decreases to an acceptable level to save some water and electricity 👍
@@hachvietnam Hi! Yes, it is possible, however in this particulary filtration system, all filters are backwashed with water from elevated tank! Regards!
Hi Sharma ! Because the filter is backwashed with air and water there is some air accumulation in the filter false bottom. Imediatelly after the filter enters in operation some of this air is released by an air relief valve. Due its high velocity it carries some water which is shown in the video.
Hi Mizael ! The air rate is usually from 10 L/s.m2 to 20 L/s.m2. Because air rate is high and pressure drop is low, we use blowers instead air compressors. The size of equipment depends of the air flow rate. For small filters the equipment is small and for large filters it can be very large, sometimes it requires more than one unit !!
Hi Mizael ! The air rate is usually from 10 L/s.m2 to 20 L/s.m2. Because air rate is high and pressure drop is low, we use blowers instead air compressors. The size of equipment depends of the air flow rate. For small filters the equipment is small and for large filters it can be very large, sometimes it requires more than one unit !!
Thank you very much! i'm making a project to implant air scour in backwashing system but i had no data about the air rate, now i can keep the project. I saw in one of your videos that you made it on Taiaçupeba's dam. Are you from SABESP?
No, Iam not from Sabesp although I have been working with them a long time ago, since 1990 ! Actually I work at University of Sao Paulo as a professor !
Então acho que poderíamos conversar em português rs. Sou um aluno do Projeto Formare, dentro da Suzano Papel e Celulose. Estou avaliando a possibilidade da aplicação de um sistema de ar comprimido dentro da Estação de Tratamento da Fábrica, visto que atualmente utilizamos somente água como meio de contra lavagem e o processo se mostra muito custoso. Já estou na reta final do projeto (que faz parte das metas a serem atingidas como aprendiz) , e com o auxílio de seus dados consegui obterr alguns avanços significativos. Tenho algumas dúvidas a sanar ainda: Cheguei ao valor de aproximadamente 29 m³/min (considerando 10 L/s.m²), que fica em torno de 1050 ft³/min, de acordo com o tamanho do leito filtrante de cada filtro da ETA (49 m²). Existe algum fabricante específico para encontrar um soprador desta magnitude? Eu também percebi que vocês fazem uso de uma purga, seria ela para retirar o ar que fica armazenado na linha após a aplicação do ar comprimido? E seria esta aplicação de ar realizada na mesma linha em que é aplicada a água de contra lavagem? Agradeço muito pela atenção! Eu estava procurando em artigos científicos algo relacionado à contra lavagem, porém estava passando por dificuldades.
Hi ! The flow rate is calculated according to the characteristics of the filter media (granulometry and physical properties) ! Please send to me your e-mail and I will send you a paper which describes the procedure to calculate the flow rate to achieve an expansion of filter media !
@@SidneySecklerFerreiraFilho Hello Sidney, I am designing a sand filter and was wondering if it would be possible for you to send me this paper too? Kind regards, Joe
Air scouring->Backwash->Rinse->Service
Step by step... WTP operator jobs
Same procedure we are using in backwashing SA and GAC filters in Serbia....
The sensor immersed in the tank, is it a turbidity sensor to controller the water pump for backwash?
Hi! No it isn´t! The control of duration of filter backwash time is done visually. Usually, it takes from 8 to 12 minutes and it is controlled by the operator. Best regards!
@@SidneySecklerFerreiraFilho we can also use turbidity to control the water pump to stop water when turbidity decreases to an acceptable level to save some water and electricity 👍
@@hachvietnam Hi! Yes, it is possible, however in this particulary filtration system, all filters are backwashed with water from elevated tank! Regards!
What's that liquid dropping into the outlet channels' center at towards the end?
Hi Sharma ! Because the filter is backwashed with air and water there is some air accumulation in the filter false bottom. Imediatelly after the filter enters in operation some of this air is released by an air relief valve. Due its high velocity it carries some water which is shown in the video.
Hi. Could you tell me how much air you use before the backwashing with water? Do you need a large compressor?
Hi Mizael ! The air rate is usually from 10 L/s.m2 to 20 L/s.m2. Because air rate is high and pressure drop is low, we use blowers instead air compressors. The size of equipment depends of the air flow rate. For small filters the equipment is small and for large filters it can be very large, sometimes it requires more than one unit !!
Hi Mizael ! The air rate is usually from 10 L/s.m2 to 20 L/s.m2. Because air rate is high and pressure drop is low, we use blowers instead air compressors. The size of equipment depends of the air flow rate. For small filters the equipment is small and for large filters it can be very large, sometimes it requires more than one unit !!
Thank you very much! i'm making a project to implant air scour in backwashing system but i had no data about the air rate, now i can keep the project. I saw in one of your videos that you made it on Taiaçupeba's dam. Are you from SABESP?
No, Iam not from Sabesp although I have been working with them a long time ago, since 1990 ! Actually I work at University of Sao Paulo as a professor !
Então acho que poderíamos conversar em português rs. Sou um aluno do Projeto Formare, dentro da Suzano Papel e Celulose. Estou avaliando a possibilidade da aplicação de um sistema de ar comprimido dentro da Estação de Tratamento da Fábrica, visto que atualmente utilizamos somente água como meio de contra lavagem e o processo se mostra muito custoso. Já estou na reta final do projeto (que faz parte das metas a serem atingidas como aprendiz) , e com o auxílio de seus dados consegui obterr alguns avanços significativos. Tenho algumas dúvidas a sanar ainda: Cheguei ao valor de aproximadamente 29 m³/min (considerando 10 L/s.m²), que fica em torno de 1050 ft³/min, de acordo com o tamanho do leito filtrante de cada filtro da ETA (49 m²). Existe algum fabricante específico para encontrar um soprador desta magnitude? Eu também percebi que vocês fazem uso de uma purga, seria ela para retirar o ar que fica armazenado na linha após a aplicação do ar comprimido? E seria esta aplicação de ar realizada na mesma linha em que é aplicada a água de contra lavagem?
Agradeço muito pela atenção! Eu estava procurando em artigos científicos algo relacionado à contra lavagem, porém estava passando por dificuldades.
please help me You have a formula to calculate the flow rate of sand filter ?
Hi !
The flow rate is calculated according to the characteristics of the filter media (granulometry and physical properties) ! Please send to me your e-mail and I will send you a paper which describes the procedure to calculate the flow rate to achieve an expansion of filter media !
Thank you i send data your e-mail
Sidney Seckler Ferreira Filho nathapong@flocculants.co.th
@@SidneySecklerFerreiraFilho Hello Sidney,
I am designing a sand filter and was wondering if it would be possible for you to send me this paper too?
Kind regards,
Joe
@@joe3994 Hi Joe ! Please send me your e-mail and I will send you some material about this filtration system !
Can I talk to you please
Sure ! If you want please send an e-mail to sidney.seckler@gmail.com