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Lesikar — Tue, 19 Feb 2008 14:40:31 GMT

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Jornada Tecnica GBS SMAGUA

Victor — Tue, 12 Feb 2008 12:47:27 GMT

La Jornada sera en Zaragoza 11 Marzo 2008.

Favor the leer el PDF para mas informacion.

RE: Reject handling of RO

TerryF — Fri, 26 Oct 2007 17:17:10 GMT

Brine crystallisation technology is possible and works but as Bill says requires heaps of dollars. I have done a lot of research on this as i am heavily involved in 3 RO projects where concentrate disposal is a big issue.

Whilst zero discharge is possible the operating costs are huge , depending on your source of energy , quantity /quality etc i have seen numbers as high as $15 /kl of permeate (not concentrate) but this may be an extreme number.

What option is "best practice" for you will depend on many factors including:

1) Size of plant

2) Water quality

3)Local climate

4) Geographical location

5) Land availability

6)Environmental objectives.

7)Energy costs

Regards

TerryF

Reject handling of RO

Membrane Worker — Fri, 26 Oct 2007 08:23:20 GMT

Can some body throw some light on this- what are the current international practices? Is evaporation and crystallisation viable commercially. Is there any other thechnology or technique- Kindly suggest a solution.

RE: Reject handling of RO

Bill Gaines — Fri, 26 Oct 2007 11:34:20 GMT

Absolutely. A brine concentrator followed by a crystallizer is a technically & commercially viable approach to produce a Zero Liquid Discharge system (and a few have actually done it) -- all it takes is LOADS of $$$. In reality, most all facilities add a small "pony" RO to further concentrate the primary RO reject and produce additional permeate. Beyond that, it depends on local conditions (environment, electrical and disposal costs, etc., etc., etc.). One might also consider proven technologies such as evaporation (solar & mechanical) and distillation (multiple effect, multi-stage flash, & mechanical vapor recompression) methods.

No proof, no data, and I don't operate any systems but an electrolytic unit by an Israli company has caught my eye. It'll be months (possibly years) before I have a definitive answer however.

RE: Pretreatment for autposy wastewater discharges

Membrane Worker — Fri, 26 Oct 2007 08:16:12 GMT

Best solution would be Anearobic Digester- Most of the slaughter houses have implemented AnD. However they have huge volumes of Effluent. 1500GPD is very little and you amy need abot 5to 6 m3 Digeter with proper pretreament.

Please vist a slaughter house treatment plant to get abetter Idea.

Hope ths help you

regards,

MW9

Pretreatment for autposy wastewater discharges

plorenzo — Fri, 03 Nov 2006 14:39:37 GMT

I would like to know information about how to treat a wastewater discharge from an autopsy room. The flow is about 1,500 gals/day. We are looking for a zero discharge equipment or treatment.

Thank you.

Jornadas Tecnicas Sobre Microbiologia del Fango Activo

Victor — Tue, 28 Aug 2007 16:40:01 GMT

Para las personas interesadas sobre la microbiologia del fango activo lo siguiente sera de interes: IV Jornadas Tecnicas de Transferencia deTecnologia Sobre Microbiologia del Fango Activo occurrira en Sevilla, España 25-26 Octubre 2007. Favor de utilizar el siguiente enlace para obtener mas informacion:

http://www.grupobioindicacionsevilla.com/D%EDptico%20IV%20jornadas%20tecnicas%20PRELIMINAR.pdf

RE: Manejo de lodos de clarificadores

Sabir — Mon, 02 Apr 2007 08:27:17 GMT

Sorry, I mistakenly open technical forum in spanish. Continue my dear it is your forum..... Thanks

Manejo de lodos de clarificadores

German — Mon, 19 Feb 2007 13:30:52 GMT

Buenas tardes

Requiero obtener información acerca de los procesos para el tratamiento, manejo y uso de los lodos retirados de un clarificador de agua.

Cualquier información es bien recibida y muchas gracias.

german

RE: Manejo de lodos de clarificadores

Sabir — Mon, 02 Apr 2007 08:24:21 GMT

Hello gays, I appreciate if you will write in english thus other forum members who can not understand the German (or what ever language you are using) can take part and get benefited from your experiences. Thanks

RE: Manejo de lodos de clarificadores

roodbuster — Mon, 02 Apr 2007 00:42:56 GMT

Me interesa informacion tambien de este tema, visite la pagina que mencionas pero no ubico nada relacionado con lodos. Te puedo comentar que la fuente generadora es una fabrica de papas fritas industriales (papas Lays) donde el Ril resultante es el generado por el lavado de papas principalmente y por los procesos industriales donde ademas se elimina una porcion de grasa producto de la fritura de las papas y de almidon por el lavado. Esta es la pagina de la fuente generadora: www.evercrisp.cl

Si quieres podemos conversarlo via messenger

mi correo es roodbuster@msn.com

RE: Manejo de lodos de clarificadores

Jorge Cevallos — Mon, 26 Feb 2007 00:32:49 GMT

Estimado German:

Los lodos de un proceso de tratamiento pudieran requerir un trato diferente según su fuente de generación y su condición. Como casi no hay datos sobre la características o fuente de los lodos a que hace referencia en su correo sugiero consiga información de la WWW.EPA.ORG

Atentamente

RE: Lodos activados

Jorge Cevallos — Mon, 26 Feb 2007 00:16:26 GMT

Liza:

Si el agua residual es de productos farmacéuticos con DQO y SS altos y la DBO soluble es baja, lo lógico es que se requiere de un tratamiento físico químico y no un tratamiento biológico.

Además debe tener en cuenta que clase de productos farmacéuticos elaboran pues si son antibióticos no parece aconsejabe usar procesos biológicos.

Atentamente

Dr. Jorge Cevallos

Lodos activados

01757634 — Wed, 22 Feb 2006 10:09:31 GMT

Saludos!

En una planta de tratamiento de aguas residuales terciaria de una industria farmaceutica, Tiene un COD-467mg/L, DO-7.56mg/L, Reactor biológico: TSS-6620mg/L, VSS- 2250mg/L; Retorno del lodo: TSS-14,500mg/L, VSS- 5000mg/L, Reactor biológico (tiempo de retención- 24hr), Etapa enaeróbico- tiempo de retención- 2.7hr, Microorganismos- no presencia, edad del lodo 28 dias(lodo viejo), turbidez en los clarificadores de 16NTU. Tanque de igualaciónde 250,000gls y se mantiene a 112,000gls a un flujo de entrada de 110gpm. Retorno de lodo a un 60% el flujo de entrada.

La situación es la siguiente: la carga organica que proviene del sistema en muy baja y se está manteniendo añadiendo azúcar ya que esa era la carga orgánica normal que recibiamos. En la actualidad la producción ha bajado en la farmaceútica y por esa razón es que añadimos azúcar. El nivel del tanque de igualación lo mantienen a un 38% cuando debe ser a un 50%. Cuando añaden azúcar no bajan el flujo de entrada. En la actualidad están injectando el flujo de entrada directamente al reactor biológico cuando debe ser al selector anaeróbico #1 y el retorno del lodo a los selectores 3 y 4 (etapa anaeróbica). Se ha estado añadiendo cultivo de bacterias comercial de novoenzymes (1004 star up, 1008 fenoles, fosfato, 1002 nitratos). En la planta de tratamiento desean solo utilizar 1 reactor biológico en vez de los dos (ambos hacen un volumen de 200,000gls).

* Que criterios debo tomar para solo utilizar un reactor biológico?

* Para reducir el nivel de DO en el reactor biológico que debo hacer? (la aereación es mecánica utilizando blowers tanto en el reactor biológico como en el tanque de igualación).

*Sí no poseo bacterias en el sistema y predominan los rotíferos, debo eliminar los rotíferos del clarificador secundario y añadir bacterias de un cultivo comercial. Como calculo la cantidad de microorganismos en el sistema? Me puede ofrecer alguna fórmula matemática?

*Como puedo obtener un SDI bajo?

Entiendo de a una edad del los menor de 15 dias lo puedo obtener y el flóculo es más grande. La planta de tratamiento se establecio una edad del lodo de 10 dias en la actualidad es de 28 dias.

Espero que puedan ayudarme.

Atentamente,

Liza

fine pore membrane diffuser cleaning

sonine — Wed, 14 Feb 2007 11:08:52 GMT

I would like to know if it exists a method of fine pore membrane diffuser cleaning more efficiently than we use in our plant of wastewater treatment. We dose formic acid, and I want to know advantages, disadvantages, in order to know the best options and give some ideas about mi degree project. I accept every technical information, links... I would be very grateful

Thank you for your help

RE: fine pore membrane diffuser cleaning

TomFrankel — Tue, 20 Feb 2007 17:47:25 GMT

Hello,
The best method of cleaning your membranes depends on what kind of fouling you have. If you are dosing formic acid then you may be able to clean out the slits. Formic is harder to entrain in the airstream than hydrochloric but I've seen it work.

However if the fouling that you are experiencing is on the surface of the membranes, this can also be a problem, and the in-situ dosed acid will never remove that. In order to clean the tops of the membranes you have to drain the tank and spray acid or acid replacement product. A garden sprayer works well for this job, and we've had a lot of success where there are calcium salts on the membrane surface using diluted Urea Hydrochloride instead of acid. It's safer to work with and has the same effect on calcium as acid.

Another possibility is that the membranes have been oxidized by something in the wastewater. If the membranes are EPDM look out for amamines, chlorines, acids (long term exposure), fats, oils, greases and aromatics. If these have oxidized your membrane no amount of acid will return them to their original physical properties or performance.

Slick surfaces like PTFE coated EPDM membranes work well to resist calcium type fouling, and alternate substrate materials like VitonTM, nitrile, PU, neoprene, or silicone may be useful
in lieu of EPDM if your problems are coming from chemical oxidation of the rubber.

-Tom Frankel
www.stamfordscientific.com

Manufacturers of fine bubble diffusers

RE: IT exam preps ?

Jeff Naumann — Tue, 02 Jan 2007 18:56:08 GMT

how good are http://www.certmagic.com exam preps for Microsoft and cisco exams ? . anyone have any info about this , then plz let me know . iam trying to shift from auto field to IT field and need some solid guidance

How far is UP?

IT exam preps ?

minicen — Sun, 12 Nov 2006 16:57:24 GMT

certification exams ?

cheal — Tue, 02 Jan 2007 16:48:23 GMT

how good are certmagic products for passing the cert exams ? . any advice will be highly appreciated

certification exams ?

cheal — Mon, 01 Jan 2007 14:12:30 GMT

how good are certmagic products for passing the cert exams ? . any advice will be highly appreciated

RE: Pretreatment for autposy wastewater discharges

El Centro — Sat, 02 Dec 2006 03:35:47 GMT

It has been proven that blood is a great source of nutrients for anaerobic biology, check for any anaerobic digester in your area.

RE: IT exam preps ?

D Shulmister — Fri, 17 Nov 2006 13:23:27 GMT

Why are you posting this question to a wastewater technology site?

RE: Pretreatment for autposy wastewater discharges

D Shulmister — Fri, 17 Nov 2006 13:22:10 GMT

Are you located within a utility service area? Generally, blood and body fluids which enter a sewage collection system lose their identity as they mix with regular sewage. You might need a screening device to capture larger solids.

RE: Pretreatment for autposy wastewater discharges

Dedalus — Thu, 16 Nov 2006 20:16:37 GMT

I think a small activated sludge "package plant" might serve your needs. This is not really the kind of waste treatment I know about, so I can't supply any more details.

Also, though it sounds pretty gruesome, you might look into what slaughterhouses do with their waste.

RE: Lodos activados

chicali — Tue, 12 Sep 2006 01:16:48 GMT

Permiteme un par de preguntas.

Puedes aislar completamente los trenes de tratamiento, equalizador-reactor biologico-clarificador?

Que haces con el exeso de lodos, (fangos), cual es la capacidad de deshecho?

Como se establecio el flujo de retorno de lodos activados?

Existe limite de turbides? El 16 es promedio o el maximo?

Utilizas el selector anaerobico para denitrificar o para otro objetivo?

Hay flexibilidad de alimentacion para el reactor biologico?

Si quieres eliminar los rotiferos solo tienes que reducir los 28 dias y operar con lodos (fangos) mas jovenes.

Si existe la capacidad de operar con un solo tren, reducir la edad de los lodos, podrias producir efluente de mejor calidad y reducir o eliminar el uso de azucar.

Disculpa la molestia y faltas gramaticales.

RE: Lodos activados

operador — Thu, 23 Mar 2006 09:14:53 GMT

Liza,

Unas preguntas,

¿El DQO de 467 mg/l es antes o después de añadir el azucar? ¿Que DBO y SS tiene el agua residual?

¿Que capacidad tiene su línea de tratamiento de fango, (Kg /día o m3/día). ¿Los gallones son americanos o ingleses?

Mi primer impresión es que debes reducir rapidamente la edad del fango.

saludos

Standard Methods

Bill — Tue, 30 Aug 2005 12:25:23 GMT

What is the latest APPROVED edition of Standard Methods which we are to be using in the United States?

RE: Standard Methods

Victor — Wed, 31 Aug 2005 17:47:58 GMT

Estimado Bill:

La respuesta a su cuestion depende del analisis, el Estado en el cual se situa el laboratorio, y el permiso guvernamental (NPDES--National Pollution Discharge Elimination System) que dicta al laboratorio cuales analisis necesitan ser hechos--al igual cual Edicion de Methodos Estandard necesita ser usado.