TH5953B - Activated sludge process - Google Patents

Abstract

It disclosed methods for removing nitrogen and phosphorus from wastewater using attivectedge sludge with aerobic bacteria. The wastewater was fed continuously and gradually into the treatment pond with The sludge is so that it can form a liquid mixture which contains Waste and sludge, whose cycle consists of a The loop and aeration process are repeated at least two times, each cycle being completed in two hours, with the ratio of The stirring time over aeration time is between 11 and 1: 5. In the stirring process the mixed liquid has an anoxic and anaerobic condition that follows. In trifecation takes place in annoxic state. And aerobic bacteria release phosphorus in an anaerobic state during the aeration process. Denitrification will be born. This increases while bacteria highly degrade phosphorus from liquid mixtures:

Claims (8)

1. Methods for removing nitrogen and phosphorus from wastewater by using attiwected sludge. Including oxygen-consuming bacteria And a change in behavior in a pond for treatment according to a period of time, consisting of a process of adding wastewater Continuously and gradually into the liquid mixture in one of the wells for Treatment consisting of wastewater and sludge Stirring the mixed liquid as Said in the said treatment pond during the filling process. Continuously And little by little of the wastewater until it is in anoxik state. And next to an anaerobic state so that elimination Nitrogen in anhydrous conditions Then phosphorus is spit out from Salad in an anaerobic state To add air to the liquid mixture In aerobic conditions during continuous and gradual dosing Of the wastewater into the mixed liquid in aerobic conditions so that Nitrification has occurred. As phosphorus is degraded by sludge, it repeats a cycle of operations consisting of episodic Such aeration and aeration are at least two times so that each cycle per aeration period is between 1: 1 and 5: 1. And then to allow it to separate into the upper and sludge liquid, and to drain the upper clear liquid into an envelope. And take the salad that Precipitated to be recycled for wastewater treatment 2. The method described in claim 1, where the sludge removal process was performed in the said treatment well while the feedwater into the well was stopped. And part of the sludge that has precipitated will be strained from the pond. For such therapy if necessary 3. Method as described in claim 2, where during the aeration process the air feed rate is controlled in order to adjust the concentration of Oxygen and dissolved in liquid mix to the specified value. To ensure exact removal of nitrogen and phosphorus 4. The method referred to in claim 1, where the sedimentation process is performed in the said treatment well while the wastewater entry into the well continues. And part of the sedimentation sludge was pulled from the pond. For such therapy if necessary 5. Method as described in Clause 4, where during the aeration process the feed rate The air is controlled in order to adjust the intensity of the Dissolved oxygen in liquid is mixed to the specified value for Make sure nitrogen is removed. And phosphorus absolutely 6. Method as described in claim 1, where during the aeration process the air feed rate is controlled in order to adjust the concentration of the air intake. Dissolved oxygen in a liquid as it has a predetermined value for Ensure exact removal of nitrogen and phosphorus 7.The method described in claim 1, where the agitated and aerated mixed liquid is transferred to the sedimentation well and ridden, the sedimentation phase is performed in that well. The waste was continuously treated and the sedimentation sludge was brought back to the treatment pond to treat the wastewater. 8. Method as described in Clause 7, where during the aeration process the air feed rate is regulated in order to adjust the concentration of the air intake. Dissolved oxygen in liquid is mixed to the specified value for Ensure absolute nitrogen and phosphorus removal (8 claims, 2 pages, 9 photos).