The wastewater treating equipment removes and eliminates the contaminants from various types of wastewater produced in the surface-treating workshop, in order to keep their concentration under the limits.The wastewater treating equipment is designed according to the quantity and the type of wastewater (e.g. acidic, alkaline etc.) and with the concentration of contaminant (thin solution or concentrated solution).Type of wastewater treating equipments:1. Working periodically:Wastewater coming from surface-treating workshop is collected in receiving vessels and led into the reactor, where reagents are dosed in accordance with the type of wastewater and the concentration contaminants. Then the treated wastewater arrives into the settling pan or equipment (e.g.: of tilted plates) where solid phase is separated from the liquid one. After a pH control the solid-free wastewater is emitted from wastewater treatment plant through an rubble filter, an active carbon filter and a final cation exchanger. The solid phase arrives in the sludge press where approximately 20-30 % solid matter content can be achieved. During further dewatering in a sludge drying equipment the solid matter content can reach approximately 90 %, which has a significant economic benefit since the deposition or elimination costs decrease radically.2. Working continuously:In the case of continuously working equipments the wastewater from the surface-treating workshop arrives also in the receiving vessels to assure uniform wastewater treatment. From here the wastewater flows into the reactor, where sensors measure the concentration of the contaminants, then automatic dosing pumps add the suitable reagents to the wastewater. This water continuously flows across the reactor where the completeness of the treatment is assured by effective mixing and a control system. The wastewater flowing out of the reactor arrives into the settling equipment where the solid phase is separated. The next step is the pH-control; eventually an active carbon treatment, followed by the final cation exchange and rubble filtering (similarly to the periodically working equipment). The solid phase is led into sludge press and finally the sludge can be enriched further in a sludge-drying machine (if requested).3. Wastewater treatment with recirculation:In order to decrease the rinsing water demand in the surface-treating workshop, after further treatment the cleaned water can be recirculated to the surface treating containers. In this case the wastewater treatment can be more effective with application of further cation and anion exchangers and active carbon cleaner because in this way totally removes organic compounds i.e. all the contaminants. The treated water can be reused in almost every bath in the surface-finishing workshop.4. Automatic wastewater treating equipment:Both the periodically and the continuously working wastewater treatment equipments can be produced in automatic versions, too. In this case a computer controls the wastewater treating equipment. Measuring units determine the parameters of incoming wastewater and the computer chooses the relevant reagents, which are added by dosing pumps, and controls the characteristics of outgoing wastewater. Personal intervention is needed only to fill up the containers with treating reagents. If an error occurs the computer gives error signals, even as SMS upon request.Innovative aspects:The novelty of the technology stems from the complex treatment of the wastewater with specific characteristics. Potential users:• companies providing electroplating services• companies active in metal processing and/or machinery industry having an in-house electroplating workshopIntellectual property rights:The method is not patented, it is a know-how.
Wastewater treatment in electroplating
Laser Consult Ltd.
Commercial Product Launch/ Market Ready/ Sales
A Hungarian SME offers wastewater treating equipment family for treating and decontaminating wastewater deriving from surface-treating workshops.