Denitrification

as water filtration

THE DENITRIFICATION PROCESS

Deni­tri­fi­ca­ti­on as oxy­gen-free water fil­tra­ti­on remo­ves toxic nitro­gen com­pounds from a (partially)-closed aquacul­tu­re faci­li­ty. In this pro­cess, nitra­te (NO3) is bro­ken down from the water in the plant with the aid of spe­cial bac­te­ria, the deni­tri­fiers. In nitra­te respi­ra­ti­on, the bac­te­ria use the nitro­gen (NO3‑N) bound in the nitra­te as well as a car­bon source (sub­stra­te, e.g. ace­tic acid CH3COOH) to gene­ra­te ener­gy and build cell struc­tures. The bac­te­ria extract the nitro­gen from the pro­cess water, whe­re­as the car­bon source must be added as requi­red. This dosa­ge is decisi­ve for sta­ble deni­tri­fi­ca­ti­on. After the con­ver­si­on of the nitra­te, only mole­cu­lar nitro­gen remains. This is harm­less to the envi­ron­ment and escapes from the plant as a gas without lea­ving any resi­due. As a result, a func­tio­n­ing deni­tri­fi­ca­ti­on leads to a redu­ced water con­sump­ti­on, becau­se no toxic sub­s­tan­ces accu­mu­la­te in the water. Without deni­tri­fi­ca­ti­on they would have to be flus­hed out of the sys­tem with an incre­a­sed water change.

The requi­red size of a deni­tri­fi­ca­ti­on depends on the dai­ly amount of nitro­gen intro­du­ced by the feed. Our stan­dard pro­duct with a volu­me of 1000 liters (IBC) is desi­gned for a feed load of around 5 kilo­grams per day. Other sizes can be offe­red indi­vi­du­al­ly on request. The SEAWATER deni­tri­fi­ca­ti­on comes with built-in auto­ma­ti­on soft­ware with cor­re­spon­ding error and warning sys­tems. It is very well sui­ted for inte­gra­ti­on into exis­ting pro­cess con­trol sys­tems and, if requi­red, also records data from exis­ting mea­su­ring devices.

 gelös­ten  Der SEAWATER Cube umfasst neben dem Pro­duk­ti­ons­be­cken meh­re­re phy­si­ka­li­sche und bio­lo­gi­sche Fil­ter­stu­fen, wel­che alle par­ti­ku­lä­ren und gelös­ten Rest­stof­fe aus dem Pro­zess­was­ser rück­stands­los entfernen.

Efficient filling pellets

Opti­mi­zed fil­ling pel­lets made of food-safe PP plastic ser­ve as a place for bac­te­ri­al cul­tures to sett­le. They also ensu­re that the bac­te­ria are well bathed in pro­cess water as well as sub­stra­te and thus sup­plied with nutrients.

Automated control

The SEAWATER soft­ware con­trols the deni­tri­fi­ca­ti­on ful­ly auto­ma­ti­cal­ly on the basis of a PLC. Depen­ding on the amount of feed, both the sup­ply of nitro­gen-rich sys­tem pro­cess water and the dosa­ge of the car­bon source are regulated.

SEAWATER substrates

Spe­cial sub­stra­tes are requi­red for a quick start-up and smooth ope­ra­ti­on of the deni­tri­fi­ca­ti­on. The­se are the food for the bac­te­ria and are pro­du­ced by us accord­ing to our own reci­pe and offe­red for sale.

Unpolluted water

In recir­cu­la­ting sys­tems, it is important that toxic nitri­te does not accu­mu­la­te in the water. With our deni­tri­fi­ca­ti­on, the nitra­te nitro­gen con­tent in the water can be kept con­stant bet­ween 50–100 mg / l NO3‑N. The­se are opti­mal values for the ani­mal wel­fa­re of the fish.

Interested in innovative water filtration?

We would be hap­py to crea­te an indi­vi­du­al offer for you! To do this, we need some infor­ma­ti­on in advan­ce, which you can pro­vi­de us with using the request form. In addi­ti­on, we have put tog­e­ther inte­res­ting bio­lo­gi­cal, tech­ni­cal and con­struc­ti­ve aspects of deni­tri­fi­ca­ti­on in a blog post on the sub­ject of „Micro­bio­lo­gy and tech­no­lo­gy of denitrification“.

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