ing the season, the local cooperatives are at peak production and the wastewater from the wineries and mills increases the water pollution levels fivefold, so that the planned infrastructure for a town of about 1,800 inhabitants must handle the extra wastewater during August and September making it equivalent to a town of 10,000 inhabitants. "This sudden impact in the process breaks the treatment efficiency of the treatment plant," said Castillo.
In Villalba, the remedy for this season’s increase in organic waste load begins in sewer manholes, under which hangs a plastic box. Each box, or G2 dosing panel, contains a one liter bottle of beneficial, non-pathogenic, naturally occurring bacteria with a small pump that continuously injects the bacteria into the sewage flow. The bacteria begin the digestion process of the sewage long before it reaches the WWTP. These bacteria are the perfect employee: they are harmless to humans, work efficiently at digesting the waste, and require no energy input.
To be effective, treatment is done throughout the year – it is not enough to apply the bacteria only during the season when the wine and olive industries begin to discharge their wastewater. Each month, the service provider replenishes the microbes in the one liter bottles, checks the batteries and condition of each self contained G2 dosing panel. The bacteria establish a beneficial biofilm in the sewer collection system, and in the biofilm community they support each other to provide high rates of metabolism.
The bacteria used are naturally found in rivers and soil where they digest waste. The In-Pipe technology accelerates the process by continuously adding the bacteria at multiple locations in the sewer system in high concentrations. In addition to the improved effluent water quality, the cost of operating the WWTP plant is reduced by 10% explained Antonio Palma, a plant technician working for the Consortium from the Council of Badajoz. Amo
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