Hy.
To treat it separately of wwtp, this two wastewaters togeter, it seems to be the best solution.
If you give us your analysis of this two , we can provide you a solution to treat it by electro-catalitic precipitation. There is experience in fruit juice , tomato, winery, wastewaters treatment.
It seems to be same or so.
Please also the flowrate of the wastewater by hour or by day and EPA requirements for the treated water you have in area.

You can contact me to:
ingoprod@netscape.net

regards
ingoprod

Dear Francis,

Though this would not make you happy, I find the findings very interesting. I know about the use or at least of trials to use hot stuff as insecticides. So can chili be used as strong bactericide?

The shrimp wastewater should be neutralized by adding acid or if feasible by reacting with carbon dioxide. There is no reason to wonder that the strong alkaline wastewater kills the bacteria. Electrolytic treatment will be unable to neutralize this waste (shift the pH).

Maybe if you combine the two wastewater, neutralize them and add them in small amounts to your wastewater everything will be fine.

Kind regards
T. Sobisch

As the mfg of the ECP process (electrocatlytic precipitation) I'm going to "weigh" in here..

First, chili's contain capsaicin, which is the capsaicoide that makes them hot. The molecular structure is a long chain conglomeration of carbon, hydrogen, and nitrogen bonds - so the capsaicin can be "broken" or oxidized by the electrolytic method into's constitutant parts or simple CO2 gas, water, and NO.

Second, capsaicin is a known bactericide - used to destroy salmonella, coliform, and others - so it is logical to assume that it is going to effect the bacteria in any biological system - whether anaerobic or aerobic.

Third, the shrimp washwater pH can probably be reduced by the ECP method, just as stated by Orenda and Ingoprod - the level of reduction will depend on other minerals/metals present in the wastewater.

I would suggest that before you add other chemicals and start messing with the balance of the wastewater system - you look at a simple ECP unit to treat the one to several hundred gallons you have - as this would be a fast batch treatment - rendering it "neutral" to your existing wastewater plant - simpler, easier, less expensive that way.
Regards,
Dave Orlebeke/Aquatic Technologies

Dear John:
I sell an electrolytic water treatment system, commonly referred to as electrocoagulation. I'd would like to weigh in on this as well. Dave is correct in saying that capsaian is a strong bacteriacide and, as such, this loading to your effluent should be treated separately before entering your biological system. Same rules apply to your wash water. I suspect this wash water contains a good level of BOD or COD loading to your effluent.We almost always suggest the wash water   should be neutralized to a pH 7 before the Electro-pulse process can be applied to the waste stream. EP workes best at pH's between 6 and 7.
Our processes are continuous and automatic. The EP process does not typcially require any chemicals to provide the BOD and COD removal. I treated a tuna fish wash water with EP down in Mexico that worked extremely well thru our test cell. It resulted in a 70% reduction in BOD and over a 95% TSS reduction in their effluent, which copnsiderably lowered the surcharge they were paying to the City of Mazatlan.  We did not test for COD during this project trial.
Another test I ran was out on the OR coast at a sumari processing plant. There, EP worked very well in separating the effluent soilds and thus reducing the BOD loadings for direct discharge.
If we could get a 3 gal sample of each wastewater from you, I can run treat the water thru our bench cell and have tests run on the effluent.
Give us a call and we can arrange to get some waste water foir testing.
Regards,
Peter Evans
Sales Engineer
OilTrap Environmental
(503) 267-3604
(503) 968-7222

Dear Francis,
                   You may want to talk to Ric Casabuena of Prochem Technology Asia Pacific in Manila. ric@prochemtechnology.com. he should be able to help.

Best regards,
Cgillen

You're using the wrong chemical to neutralize the wash water; an acidic compound is necessary to reduce the pH. Sulfuric acid, hydrochloric acid, or even carbon dioxide may be used to lower the pH. I think you are going to need the assistance of an experienced operator to help you solve your problems.

Sincerely, grrun    

Fhm:

You may want to revisit the ECP process from Aquatic Consultants as a means of economically and efficiently treating your effluent. The process can be demonstrated to your satisfaction by pilot testing.....contact Dave Orlebeke at aquaticonsult@yahoo.com.

Orenda

A note on AndyNC's Comment - I respectfully disagree re the phosphoric acid, it is usually organophosphates that are regulated as opposed to mineral phosphates.  Phosphoric acid also has less of safety risk associated with handling than either the hydrochloric or sulfric acids.  However I Don't know what the potassium phosphate would do to the treatment works.  Any one know the relative bio-availability/stability of potassium between the chloride, sulfate, and phosphate salts.

Re reply by dbrock to andyNC

A large number domestic wastewater treatment plants in NZ, Australia and Europe are consented for Total Phosphorus as they contribute to eutrophication (depends on whther N or P is the limiting nutrient).  
Therefore, where a plant does have a P consent, adding a source of P is asking for trouble!  Not only that but Phos Acid is very expensive (white acid more than green) and CO2 or the usual mineral acids should be used.

Phosphorus or phosphates!  That is the question!

Most plants that I have come across have a Totoal Phosphorus concent that will encompass all forms of P (both organic and inorganic).  During the treatment process of domestic sewage by activated sludge (and nearly all other viariants), the organic P is oxidised to orthophosphate.  Ortho-P can be removed from the effluent by dosing Iron or Aluminium salts to precipitate the soluble P to the settleable insoluble form.

Gone off on a tangent a bit on the original answer, but what the hell!

As long as wr are digressing, don't forget that microorganisms contain P and may release some of it as they age. I'm not sure if you would consider this organic P or not, but when you digest a sample of effluent with a substantial concentration of suspended solids, it will have both soluble and insoluble P components.

grrun