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Treatment of Phytosanitary Effluents in the Douro Vineyard

In 2011, we started the treatment of phytosanitary effluents produced on the farms owned by The Fladgate Partnership and chose for this purpose the Heliosec method proposed by Syngenta. At that time, we were pioneers in Portugal in using this treatment for this type of effluent. The Heliosec station treatment was unknown to us and was a little heard of innovation in Europe.

In choosing the station, we were captivated by the simplicity and efficiency of Syngenta’s proposal which is presented in:

https://www.syngenta.pt/heliosec

In summary, it is a tank lined with a plastic screen capable of receiving the phytosanitary effluents produced in the washing of spraying equipment and which, due to the combined effect of solar radiation and wind, end up being dehydrated.

Eight years ago (2011) we planned our own phytosanitary washing center and its connection to the treatment station, as well as focusing on pressure washing to save water usage. We also introduced a variant capable of measuring and limiting water usage. Thus, instead of draining the dirty water directly to the station, we receive it in an intermediate container so that we can account for the water used during the wash and also have a station to receive effluents from other distant farms.

To date, we have installed two Heliosec; one at Quinta da Roêda (Pinhão) and another one at Quinta de Terrafeita (Celeirós).

In the first year of operation (2011), we disclosed the excellent results obtained at Quinta da Roêda:

Treatment of Phytosanitary Effluents – First results:

  • Year: 2011
  • Location: Quinta da Roeda, Pinhão; Vineyard Area: 77,4 hectares.
  • Operating period (first day of Heliosec filling up to the day of total evaporation of the wash water): from 2 March to 4 August 156 days.
  • Total Wash Water: 3.530lts; 45,62lts/hectare and year.
  • Average evaporation rate (calculation on 3430lts, discarding 100lts added extemporaneously on August 29): 22lts/ day. Between 9 May and 28 June, there was the highest average daily evaporation rate: 31.4lts.

Weather data from 156 days (from 2/3 to 4/8) of evaluation of Heliosec in 2011:

Average Air Temperature (°C)

Average Relative Humidity

(%)

Average wind speed

(m/s)

19,0 60,6

1,0

After these excellent results from this first experiment, we increased the number of washing centres.

At the end of 2018, we had an annual average recovery of 24 liters of phytosanitary effluent for treatment per hectare of vines. This value represents all washing water for equipment used in pesticide, mechanical and manual treatments (Chart 1)

The amount of effluents depends on the amount of disease in each year and the continuity between chemical sprays.

The volume of effluent produced by simple disease pressure is also different from farm to farm, because of the local climate. The difference between Quinta da Roêda, in the Cima-Corgo, and Vargellas, in the Douro Superior, where normally the pressure of wine diseases is lower, came as no surprise. (Chart 2).

The plastic used to coat the tank at the treatment station and collect the dry pesticide deposit is delivered to a specialized company —https://www.indaver.com/pt-pt/home/ — proof of which is retained.

 

The treatment of phytosanitary effluents, or in other words the recovery and treatment of the washing water of the equipment used for the sanitary protection of grapevines, was highlighted in the March 2019 issue of PHYTOMA magazine, which describes 18 different systems.

by Cristina Loureiro
Member

Taylor's

Area

Winery

Website

https://www.taylor.pt/pt

Date

11 Outubro, 2019

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