Inactivation of phosphorus in two shallow lakes by means of PROTEfos prof. Ryszard Wiśniewski dr Przemysław Nowacki mgr inż. Adrian Szulczewski

Innovation of our method and comprehensiveness of services provided by us. Innovation – technology of blocking phosphorus directly in bottom sediment (the core of our service). Comprehensiveness – using many different and individualy selected supportive methods around the core one. Our method is patented.

Visualization of the inactivation process

Two-unit vessel for phosphorus inactivation in bottom sediments – surface unit.

Two-unit vessel for phosphorus inactivation in bottom sediments– underwater unit.

Winiary Lake – bird’s eye view. field base

Winiary Lake – bathymetry

Winiary Lake – sonar view.

Jelonek Lake – bird’s eye view and a bathymetry. field base aerators

Jelonek Lake – sonar view.

Dosing chemical substances First stage was the dosing of ferric chloride from the surface to precipitate the suspended matter and to bind the phosphorus from water and ground it within the bottom of the lake. Second and main stage was the dosing of appropriate chemical substances into bottom sediment of the lake. Launching additional supportive methods.

Undertaken Actions– analysis and monitoring. Water analysis: Temperature profile pH Sechci disk visibility BOD5 COD Mn COD Cr Electrical conductivity Dissolved oxygen Oxygen saturation Total nitrogen Ammonium nitrogen NitratesNitrites Organic nitrogen Total phosphorus PhosphatesChloridesSulfates Chlorophyll a Total iron Aluminium Coli index Amount of mesophilic and psychrophilic bacteria Seston dry substance (from the bottom layer and the surface layer) Bottom sediments analysis : Water content Dry residue Mineral compounds content Organic matter content Reaction (pH) Total Kiejdahl nitrogen Ammonium nitrogen Nitrite nitrogen Nitrate nitrogen Total phosphorus Phosphates Phosphorus fractions EPC-0IronAluminiumCalciumMagnesiumManganeseChromium Oxygen concentration in intrasediment water Sediment temperature Analysis of biotic elements: Species and quantitive composition of phyto- and zooplankton Fish species composition Water plants species

Undertaken Actions– regeneration of the retention ability of the pond in the vicinity of Lake Jelonek.

Undertaken Actions– using barley straw. Decomposition of barley straw causes release of chemical substances called algaestatics – reducing the growth of algae, including blue-green algae Straw used for this purpose was formed in bricks about 10 kg each. Overall, there were 600 of such straw bricks installed on both lakes.

Undertaken Actions– deployment of barley straw. Jelonek WiniaryPond

Undertaken Actions– deployment of barley straw.

Undertaken Actions– biomanipulation (changes in fishstock). 263 kg of fish were caught in Lake Jelonek. 10% of them were predatory fish (pike, zander). 90% were the so called white fish (crucian carp, prussian carp, carp beam, tench). In Lake Winiary 290 kg were caught. 28% constituted predatory fish (zander, pike, perch) and 72% constituted white fish (prussian carp, carp, carp beam. The two lakes were also stocked with Autumn and Spring fry of pike in the following quantities: -Lake Jelonek – 250 kg i.e pcs. + 10,500 pcs. -Lake Winiary – 300 kg i.e pcs +11,500 pcs.

Undertaken Actions– biomanipulation (changes in fishstock).

Undertaken Actions– reintroduction of macrophytes (Lake Winiary). włosienicznik rdestnica kędzierzawa

Undertaken Actions– reintroduction of macrophytes. The following species of submerged plants were introduced in Lake Jelonek in the years : - Myriophyllum spicatum pcs., - Ceratophyllum demersum pcs., - Potamogeton lucens pcs., - Elodea canadensis pcs. - Stratiotes aloides pcs., - Nitellopsis obtusa pcs. As well as other species of plants with floating leaves (planted in bunches about 10 pcs. each) : - Typha latifolia - 25 bunches pcs., - Nuphar luteum- 10 bunches, - Butomus umbellatus - 5 bunches pcs., - Schoenoplectus lacustris- 5 bunches, - Iris pseudacorus - 5 bunches pcs., - Hipperius vulgaris pcs. Overall quantity of macrophytes and macroalgae planted on both lakes and the pond reaches 7050 pcs. (in the years ).

Results – increase of water transparency Average from 97% (Winiary) to 103% (Jelonek) - max. 1,1 – 4m IX IX sampling points 1w 2w 3w 1j 2j 3j

Results – decrease of total phosphorus in water Average from 55% (W) to 58% (J) IX IX sampling points 1w 2w 3w 1j 2j 3j

Results– decrease of chlorophyll a Average from 52% (J) to 67% (W). Average from 52% (J) to 67% (W) IX IX sampling points 1w 2w 3w 1j 2j 3j

Thank you for your attention and let’s launch some projects.