A MODULAR DRAINAGE FILTER SYSTEM FOR TREATMENT OF AGRICULTURAL DRAINAGE WATER

Abstract

A modular drainage filter system for treatment of agricultural drainage water such as residual streams derived from agricultural activities is provided. The system has an inlet for receiving ADW, at least one bio electrochemical reactor arranged to denitrify the ADW and at least one outlet for expelling at least partly denitrified ADWT. The drainage filter system further includes one or more inlet sensors arranged upstream the BER and processing means for determining the optimal energy provided to the BER based on the data from the one or more inlet sensors thereby allowing effective operation of the drainage filter system.

Claims

1. A modular drainage filter system for treatment of agricultural drainage water (ADW), the drainage filter system comprising an inlet for receiving ADW, at least one bio electrochemical reactor (BER) module arranged to denitrify the ADW and at least one outlet for expelling at least partly denitrified ADW, the drainage filter system further comprising one or more inlet sensors arranged upstream the BER and a processing unit for determining the optimal energy provided to the BER based on the data from the one or more inlet sensors.

2. The system according to claim 1, wherein the BER is arranged to first denitrify the ADW to obtain the at least partly denitrified ADW and subsequently oxidate the at least partly denitrified ADW.

3. The system according to claim 1, wherein the one or more inlet sensors is arranged to measure N-concentrations and/or flow rate of DWT into the drainage filter system.

4. The system according to claim 1, arranged to receive an unregulated inflow of ADW.

5. The system according to claim 1, wherein a filter unit comprising an electrocoagulation colloid removal module arranged upstream the BER.

6. The system according to claim 1, wherein an oxidation module is arranged downstream the BER.

7. The system according to claim 1, wherein the BER comprises metal mesh and/or granular carbon electrodes.

8. The system according to claim 1, comprising one or more outlet sensors downstream the BER and/or one or more remote sensors, the outlet and/or remote sensors collecting data which is provided to the processing unit.

9. The system according to claim 1, wherein the at least one outlet sensor, inlet sensor and/or remote sensor are configured to measure air temperature, ground temperature, ADW temperature, flow out of the system, flow into the system, ADW composition, rain fall, time and/or weather conditions.

10. The system according to claim 1, comprising means for storing, processing, displaying and/or sending data from the downstream, inlet and/or remote sensors, data about energy provided, reports, user actions, energy consumption and/or system status.

11. The system according to claim 1, arranged to provide reports to authorities and/or users.

Description

BRIEF DESCRIPTION

[0042] Some of the embodiments will be described in detail, with reference to the following figures, wherein like designations denote like members, wherein:

[0043] FIG. 1 shows a schematic view of a drained field and power sources in relation to a system according to embodiments of the present invention;

[0044] FIG. 2 shows a schematic view of a BER unit with an upstream ECC and downstream Oxidation unit; and

[0045] FIG. 3 shows a schematic representation of data communication between the processing means and various units.

DETAILED DESCRIPTION

[0046] FIG. 1 shows a schematic view of a modular draining filter system according to embodiments of the present invention 1 in relation to a drainage system 2 of a field 3. The ADW from the drainage system is collected and channelled to the modular drainage filter system 1 and from the modular drainage filter system to a water stream. The size of the filter unit is highly dependent on the filter technology with an approximate area ratio of surface-flow: wood-chip: present BER technology of 1:0.2:0.001. For example, a modular system according to embodiments of the present invention may take up 10.5 m.sup.2 pr. 100 ha field vs e.g., 1120 m.sup.2 pr. 100 ha field for a wood chip based biofilter. The modular drainage filter system of embodiments of the present invention requires significantly less space than known solutions to achieve the required degree of denitrification.

[0047] FIG. 2 shows a schematic view of an embodiment of modular system according to the present invention 1 in a setup with three modules in form of an ECC 5 followed by a BER 6 followed by an oxidation step 7. The modules form an integrate system. The modular drainage filter system further has an inlet 8 and an outlet 9. Upstream the ECC module one or more sensors 10 are arranged to monitor at least the composition and ADW flow into the modular system. Indicated in FIG. 2 is further how the processing means 11 receives sensor input and interacts with energy providers 12 as well as provides output/input to/from the user 13 here via an app on a mobile device and in form of reports to regulatory agencies 14.

[0048] FIG. 3 illustrates an example of how the data processing means can receive data and communicate with different units such as sensors, energy sources and one or more users. The modular system comprising the BER also interacts with the data processing means as well as it may communicate with and at least receive power from one or more power supplies. Data from the BER, such as status and/or load, may be provided to a user via e.g., a mobile device.

[0049] Although the present invention has been disclosed in the form of embodiments and variations thereon, it will be understood that numerous additional modifications and variations could be made thereto without departing from the scope of the invention.

[0050] For the sake of clarity, it is to be understood that the use of a or an throughout this application does not exclude a plurality, and comprising does not exclude other steps or elements. The mention of a unit or a module does not preclude the use of more than one unit or module.