摘要:
The present disclosure generally relates to a system for monitoring and/or controlling one or more agents, such as cleaning agents, in a wastewater treatment system. The system comprises a bio-electrochemical sensor for monitoring metabolic activity of a population of exo-electrogenic bacteria and providing an electrical output corresponding with the metabolic activity, where the bio-electrochemical sensor comprises an electrode pair and a power source for delivering a voltage across the electrode pair, and an electrical output analyzer for analyzing the electrical output and correlating the electrical output with the one or more agents in the wastewater treatment system. a change in electrical output beyond a threshold indicates that an adjustment in the delivery of the one or more agents is needed. a method and sensor for monitoring and/or controlling a cleaning process in a wastewater treatment system are also provided. The system, method, and sensor disclosed herein are particularly useful for cleaning membranes incorporated in a wastewater treatment process.
摘要:
Apparatus (2) for sensing at least one parameter in water, which apparatus (2) comprises: (i) a conductivity sensor (6) for sensing conductivity in water; (ii) the conductivity sensor (6) is an electrode-based conductivity sensor having bare electrodes (12) which contact the water; (iii) there are at least four of the electrodes (12); (iv) the conductivity sensor (6) is fabricated on a substrate (14) using photolithography and etching; (v) the conductivity sensor (6) is an open cell sensor having a physically unconstrained electric field; (vi) the conductivity sensor (6) is of a dot construction comprising a dot and a surrounding formation; (vii) the conductivity sensor (6) has two electrodes which are for current stimulation and which geometrically bound and enclose another two electrodes which are for voltage sensing; and (viii) the conductivity sensor (6) is a laminar construction on the substrate (14).
摘要:
We describe a floating respirometer, in particular for monitoring an activated sludge vessel of a sewage treatment plant. The device comprises: a buoyancy device to allow the respirometer to float in an aqueous liquid; a respirometer chamber, supported by the buoyancy device and arranged such that, when the respirometer is floating in said aqueous liquid, said chamber is partially filled with said aqueous liquid and defines an enclosed head space above said aqueous liquid; and a gas sensor in gaseous communication with said head space.
摘要:
A first flow rate adjustment mechanism (18) and a second flow rate adjustment mechanism (28) are controlled by a flow rate control unit (62) so that a carrier gas flows through a first supply path (56) and a second supply flow rate (57) at a predetermined flow rate. The flow rate control unit (62) includes cell flow rate control means (66) for controlling the first flow rate adjustment mechanism (56) and the second flow rate adjustment mechanism (57) so that the flow rate of the carrier gas introduced into a sample cell (44) in a sparging state, which is a state where the carrier gas is supplied from the first supply path (56) into a syringe pump (4), and the flow rate of the carrier gas introduced into the sample cell (44) in a normal state.
摘要:
A sensor assembly includes a first sensor and a second sensor. An enclosure is operably coupled to each of the first and second sensors and contains memory that stores compensation data for each of the first and second sensors. A connector is operably coupled to the first and second sensors. A bioreaction sensing assembly as well as a method of manufacturing the bioreaction sensing assembly is also provided.
摘要:
We describe a method of closed-loop control of a waste water treatment plant, the method comprising: obtaining a fluid sample from a fluid of said plant; providing said fluid sample to a sealed chamber such that said fluid sample incompletely fills said sealed chamber leaving a headspace; incubating said fluid sample in said sealed chamber; determining a change in pressure in said headspace during said incubating; and controlling a degree of aeration of said waste water treatment plant responsive to said change in pressure. We also describe a method of measuring one or both of the food content and the biomass content of a fluid of a waste water treatment plant, the method comprising determining a value for one or both of food content and biomass content from a change in pres sure.
摘要:
A digestion reactor for digesting a substance contained in a liquid sample, comprising: a digestion container for accommodating the liquid sample; and a heating apparatus comprising at least two heating shoes, especially heating shoes arranged opposite one another, each of which has a heating surface facing the digestion container and contacting a surface portion of the outer wall of the digestion container. An analytical device for determining a parameter of a liquid sample, especially a digestion parameter, such as chemical oxygen demand, total carbon content, total phosphate content, total iron content or total nitrogen content, can comprise such a digestion reactor as a well as a transport and dosing system, which is embodied to withdraw from a sample supply a predetermined volume of a liquid as a liquid sample and to transport the liquid sample into the digestion reactor; and a measuring transducer for registering a measured variable correlated, measured value of the liquid sample accommodated in the reactor.
摘要:
The present invention concerns a method of estimating and optionally controlling the microbiological state in a process stream of an industrial process by measuring the concentration of dissolved oxygen or the rH value, or both, in said stream, the method including continuous or periodic sampling and online measurement. The invention also concerns a device suitable for use in implementing said method.
摘要:
A method for measuring the biodegradability of organic substrates by the fluorescent and/or colorimetric detection of the microbial activity generated by the addition of organic substrates to a mixture of microorganisms.