An extraction manifold for extracting digestate from a covered lagoon digester includes a digester vessel being shaped generally as a rectangular prism lacking an upward facing face and having a floor sloping generally downward from an intake face to an extraction face of the digester vessel. The intake face and extraction face are oriented vertically, situated in opposed relation on a longer horizontal axis. Each effluent pipe terminates in an extraction nozzle on one end and an independently addressable actuatable valve on the opposite end. Each actuatable valve communicates with a manifold plenum such that actuation of the valve draws digestate from the floor in a region of the floor adjacent to the extraction face and in proximity to the extraction nozzle. A valve controller actuates valves to remove digestate from the region of the floor adjacent to the extraction face. The valve controller includes sensors to monitor biogas production.

The disclosure provides automated methods and systems for optimized dosing of chemicals, such as coagulants, acids, and/or bases, in water treatment processes. The methods and systems of the disclosure can provide a coagulant dosing regimen that mitigates turbidity and organic contaminant content while maintaining effective floc precipitation, agglomeration, and settling without significant human intervention.

A processor-based method of determining a characteristic of a fluid, the method comprising: obtaining spectral emission signature (SES) data of the fluid, wherein the SES data comprises, for one or more SES channels: intensity of radiation emitted by the fluid, in one or more channel emission frequency bands, at least partially in response to excitation of molecules of the fluid by received radiation of a respective channel transmitted frequency; and utilizing a machine learning model to determine, from the obtained SES data, data indicative of one or more characteristics of the fluid, wherein the machine learning model was trained in accordance with, at least, a plurality of training examples, one or more of the training examples comprising: SES data of a fluid sample, and one or more fluid characteristics of the fluid sample.

An embodiment provides a method for real-time management of device maintenance utilizing quality metrics defined based upon inputs of the device, the method including: receiving inputs corresponding to a particular device, wherein the particular device provides measurements of a parameter of a fluid; generating, from the inputs, quality metrics for and unique to the particular device; monitoring the particular device while the particular device is deployed, wherein the monitoring occurs in view of the quality metrics; and triggering, responsive to detecting information corresponding to the particular device is violating at least one of the quality metrics, a notification to a user to perform an action corresponding to the particular device.

A method, system and composition is described for treating waste generated from manufacturing operations including at least one of Printed Circuit Boards Fabrication (PCB FAB), General Metal Finishing (GMF), semiconductors manufacturing, chemical milling, and Physical Vapour Deposition (PVD). The method, system and composition are used to create zero liquid discharge recycling.

An automated total organic carbon analyzer is described. Embodiments of the system include two features, namely the development of a selective oxidation reactor to oxidize organic contaminants to their corresponding organic acids, and the measurement of the organic acids individually by chain length using an electroanalytical detector. Combining this electroanalytical approach with sequential detection capabilities (such as spectrophotometry) can expand the instrument capabilities by providing organic contaminant speciation. The described reactor performs selective oxidation of organic carbon to organic acids followed by complexation with a proprietary ligand, then selective detection using electroanalytical accumulation and desorption of organic acids performed at an electrode surface.

A computer-implemented method includes controlling an instrument to measure a fluorescence emission spectrum of a sample including a first peak emission wavelength and at least a second peak emission wavelength, emitted in response to an excitation wavelength and controlling the instrument to measure an absorbance obtained at the excitation wavelength of the sample. The method may include determining, using the computer, a ratio of the measurements at either the second peak emission wavelength, or a sum of measurements at a plurality of peak emission wavelengths including at least the first peak emission wavelength and the second peak emission wavelength, to the first peak emission wavelength, and calculating, using the computer, a value for a quality parameter based on a combination of at least the ratio and the absorbance measurement. The method may include controlling an associated process based on the quality parameter.

Processes, systems, and techniques for treating produced water drawn from a subterranean formation. The produced water is provided and contains dissolved solids and magnesium, calcium, and sodium ions. The produced water is desalinated using an electrically-driven membrane separation apparatus that includes alternating anion exchange membranes and cation exchange membranes defining opposing sides of alternating product and concentrate chambers. The desalinating involves flowing the produced water through the product chamber, flowing a second water through the concentrate chamber, and applying an electric potential across the cation and anion exchange membranes as the produced and second waters flow through the product and concentrate chambers, respectively. The product water is consequently produced and has a total dissolved solids content of between 300 mg/L and 8,000 mg/L, a total concentration of calcium ions and magnesium ions less than 100 mg/L, and a sodium adsorption ratio of 20 to 90.

A method for treating domestic sewage includes: preliminarily treating the domestic sewage through a grating and a grit chamber, so as to remove large-particle solids in the domestic sewage; and subjecting the domestic sewage after the preliminary treatment to circulating anaerobic-oxic treatment in a membrane bioreactor (MBR). In the oxic treatment process, microorganisms oxidize nitrogen in the sewage into nitrite or nitrate. Under anaerobic conditions, denitrifying bacteria in the microorganisms reduce the nitrate, releasing molecular nitrogen or nitrous oxide. In the present invention, the MBR is filled with a quinone-based hollow fiber membrane. During the microbial denitrification, the quinone acts as an electron transfer carrier to participate in the denitrification to promote the reduction of the nitrate (nitrite), increasing the denitrification rate under anaerobic conditions, and achieving the purpose of efficient denitrification.

Methods are described that reduce the amount of organic matter in water, including reducing an amount of total organic carbon in water. The method includes adding powder activated carbon to the water; mixing the powder activated carbon in the water; and separating the powder activated carbon from the water. Also described are a method for reducing glycol content in water containing glycols, and a method for reducing glycol content in a steel mill wastewater stream containing glycols.