Abstract: A wastewater treatment process by an electrochemical apparatus, said apparatus having at least an electrochemical electrode (30), and said electrochemical electrode (30) having suitable electrode plates comprises the following steps: passing high concentration wastewater containing undesirable solutes through at least one electrochemical electrode (30) to which a DC electrical current is applied to destroy the undesirable solutes in the water intake, so as to output water having a lower concentration of the undesirable solutes; the DC current applied to the electrochemical electrode (30) comprises at least a constant potential difference stage exerted on both ends of the electrochemical electrode (30), and followed by a constant current stage through the electrochemical electrode (30).

Abstract: A dewatering system includes a selective calibrating sensor circuit configured to receive sensor readings from an electronic sensor, to determine if the electronic sensor is immersed in water, to allow a user to adjust a pump down time in the field, and to generate a control output signal accordingly. The selective calibrating sensor circuit periodically performs a self-calibration when the electronic sensor is not immersed in water to cancel the effect of potential contaminants deposited on the electronic sensor over its operating life. The selective calibrating sensor circuit inhibits calibration when the electronic sensor is immersed in water. In some applications with multiple electronic sensors, the selective calibrating sensor circuit disconnects from one of the electronic sensors before performing the self-calibration. In certain embodiments, a pump control circuit including the selective calibration sensor circuit can be configured to be mounted with a housing of the pump.

Abstract: A pump control system for a submersible pump is provided. The system includes a pump controller adapted to activate the pump when water has reached a high threshold level and to deactivate the pump when water has dropped to a low threshold level. The pump controller also incorporates one or more sensing devices that are capable of detecting the presence of a non-conductive fluid in water so that the pump can be deactivated if oil is detected in water. The system further includes an auxiliary control device which is adapted to automatically override the pump controller and de-energizes the pump if the pump remains activated when water drops to a level below the low threshold level.

Abstract: A high liquid alarm system for use in detecting the presence of water and oil in water present in a confined space is disclosed. In one implementation, the system includes an optical sensor capable of detecting water at a certain level, a sensing device capable of differentiating oil and water, and an alarm indicator. The sensors are in communication with an indicator which is capable of providing alert signals. The optical sensor is configured to activate a second alarm in the indicator when water is detected at about a predetermined level and the sensing device is configured to trigger a first alarm when oil in water is detected at about the predetermined level. The sensors can also be interconnected such that the sensing device is activated upon detection of water by the optical sensor, reducing the power consumption of the system.

Abstract: A high liquid alarm system for use in detecting the presence of water and oil in water present in a confined space is disclosed. In one implementation, the system includes an optical sensor capable of detecting water at a certain level, a sensing device capable of differentiating oil and water, and an alarm indicator. The sensors are in communication with an indicator which is capable of providing alert signals. The optical sensor is configured to activate a second alarm in the indicator when water is detected at about a predetermined level and the sensing device is configured to trigger a first alarm when oil in water is detected at about the predetermined level. The sensors can also be interconnected such that the sensing device is activated upon detection of water by the optical sensor, reducing the power consumption of the system.

Abstract: Foam-controlled detergent compositions comprising alkoxylated nonionic surfactant, polydimethylsiloxane foam-controller dispersed therein, and siloxane-oxyalkylene copolymer as dispersing agent therefor, the weight ratio of polydimethylsiloxane to dispersing agent lying in the range from 2:1 to 20:1. The compositions preferably also contain particulate silica in a weight ratio of polydimethylsiloxane to silica of from 20:1 to 200:1.

Abstract: A separator intended for use in dividing air into relatively warm and cool components is provided with an elongated cylindrical housing having one open end. The housing encloses a rotatably mounted and motor driven impeller having a portion near the open end for moving air axially and a portion near the opposite end of the housing for moving air radially thereof. The opposite end of the housing has means which carries away warm air from an area near the longitudinal axis of the impeller while other means radially spaced from the axis carries away relatively cool air.