dissolved ammonia Articles | Environmental XPRT

High temperature agitated slurry nickel ore mixtures & solvent extractions (SX) - Case Study

High Temperature Agitated Slurry Nickel Ore Mixtures & Solvent Extractions (SX) Agitated heavy slurry mixtures are endured by the sensor by use of a strong break resistant thick-wall pH glass element (nearly unbreakable in most mining slurries) Build up on reference element is minimized by solid state reference system, which also allows for aggressive chemical and mechanical cleaning ...

Dec. 28, 2020

By Advanced Sensor Technologies, Inc. (ASTI)

High temperature agitated slurry copper ore mixtures - Case Study

High Temperature Agitated Slurry Copper Ore Mixtures Agitated heavy slurry mixtures are endured by the sensor by use of a strong break resistant thick-wall pH glass element (nearly unbreakable under ordinary mining slurries use) Build up on reference element is minimized by solid state reference system, which also allows for aggressive chemical and mechanical cleaning Retrofit sensor can ...

Dec. 28, 2020

By Advanced Sensor Technologies, Inc. (ASTI)

Changes in benthic nutrient sources within a wetland after hydrologic reconnection

Removing dams and levees to restore hydrologic connectivity and enhance ecosystem services such as nutrient removal has been an increasingly common management practice. In the present study, the authors assessed geochemical and biological changes following engineered levee breaches that reconnected eutrophic Upper Klamath Lake and Agency Lake, Oregon, USA, to an adjacent, historic wetland that ...

Jun. 15, 2012

By John Wiley & Sons, Ltd.

Total ammonia determination through online ammonium ion and pH monitoring - Case Study

Industrial grade ammonium ion selective membrane and application engineered solid state conductive polymer reference can withstand the rigors of industrial process lines Ammonium calibration system has been optimized to yield reproducible results in a variety of wastewater systems Ammonia gas resistant pH sensor delivers the accuracy needed for total ammonia computation via a PLC or DCS from ...

Jan. 1, 2004

By Advanced Sensor Technologies, Inc. (ASTI)

Measuring concentrations of ammonia in ambient air or exhaust air stream using acid traps

Received for publication May 1, 2008. Strong acid solutions have been widely used in acid traps to determine concentrations of ammonia in ambient air or exhaust air stream. A literature survey indicates the method has a long history and a wide variation in use. Through a series of studies, this paper examines several factors including volume of the acid, depth of the acid, and airflow rate; that ...

Mar. 1, 2009

By Soil Science Society of America (SSSA)

Using UV Fluorescence technology to monitor for organic pollutants in Flood Water

For many years the water industry has relied on traditional sampling techniques to monitor water quality in a wide range of environments. Traditional tests such as BOD, PH, Dissolved Oxygen and Ammonia have formed the bedrock of monitoring parameters. There is however other ways to establish water quality and UV fluorescence offers an up to date solution for the investigation of Organic ...

Feb. 26, 2014

By Safe Training Systems Ltd. (STS)

Effects of intermittent loading on nitrogen removal in horizontal subsurface flow wetlands

Removal of CBOD5 and nitrogen from septic tank effluent was evaluated in four horizontal subsurface flow (HSSF) wetlands. An intermittently loaded cell was compared to a continuously loaded control cell, with both treatments receiving the same weekly volume. The intermittent cell was rapidly drained and “rested” for 24-hr, then refilled in steps, twice weekly. Two media with different particle ...

Oct. 1, 2010

By IWA Publishing

Natural stressors in uncontaminated sediments of shallow freshwaters: The prevalence of sulfide, ammonia, and reduced iron

Potentially toxic levels of three naturally occurring chemical stressors (dissolved sulfide, ammonia, and iron) can occur in freshwater sediments, although their roles in shaping ecosystem structure (i.e., plant and animal communities) and function (e.g., biologically mediated elemental cycles) have received little study. This critical review discusses the prevalence and ecological effects of ...

Nov. 7, 2014

By John Wiley & Sons, Ltd.

Autotrophic nitrogen removal at low temperature

In this work the autotrophic nitrogen removal was carried out at moderately low temperatures using two configurations: a) two-units one comprising a SHARON reactor coupled to an Anammox SBR and b) single-unit one consisting of a granular SBR performing the CANON process. At 20°C the two-units system was limited by the Anammox step and its nitrogen removal capacity was around ten times lower than ...

Mar. 1, 2011

By IWA Publishing

Measurement of Ammonia in Municipal Drinking Water for sterilization with Monochloramines

Real-time continuous online measurement system for ammonia Low Initial Procurement Cost compared to competing technologies and offerings No need for chemical feed and rebuilding of sensors Lower Cost of Ownership due to very long sensor lifetime, low maintenance & cleaning requirements for inline, immersion & submersion ion selective sensors Intuitive and easy to use TT-MA analyser ...

Sep. 18, 2020

By Turtle Tough Pty Ltd

How Does the Membrane Aerated Biofilm Reactor Work?

Aerobic digestion and nitrification-denitrification work together thanks to an innovative membrane system One of the most talked-about new wastewater treatment technologies is the membrane aerated biofilm reactor (MABR), which is revolutionizing WWT. The discussion, however, has mainly focused on issues like MABR technology’s low operating expenses, high energy efficiency, low ...

Feb. 5, 2018

By Fluence Corporation

Modelling of sediment nutrient fluxes for a pulsed organic load

A sediment model has been developed to simulate the Sediment Oxygen Demand (SOD) and sediment nutrient fluxes after a sudden input of Particulate Organic Matter (POM). Compared with previous sediment models, the main advances are the use of a continuous function to represent the kinetics of POM diagenesis and inclusion of the biomass content in POM diagenesis. Laboratory experiments were also ...

Mar. 17, 2011

By Inderscience Publishers

Life history responses of Daphnia similoides simultaneously exposed to microcystin‐LR and ammonia and their post‐exposure recovery

Aquatic organisms often suffer episodic stress from cyanobacterial bloom‐derived concomitant and sometimes interactive stressors, and may recover when stressors terminate. To assess whether exposed Daphnia can quickly recover from combined toxicity of bloom‐derived stressors, we exposed Daphnia similoides to mixtures of ammonia (0, 0.37, and 0.58 mg L−1) and dissolved microcystin‐LR (0, 10, ...

Jul. 31, 2014

By John Wiley & Sons, Ltd.

Hybrid membrane process: Performance evaluation of biological PAC

This study investigated the use of biological powdered activated carbon (PAC) for the removal of natural organic matter (NOM) and ammonia from drinking water. The impact of solids retention time (SRT), hydraulic retention time (HRT), PAC diameter and PAC concentration on the process efficiency was evaluated. Five bioreactors were filled with a slurry using two PAC concentrations (5 or 25 g l−1), ...

Jun. 1, 2010

By IWA Publishing

Forced ammonia stripping from livestock wastewater: the influence of some physico-chemical parameters of the wastewater

In highly alkaline aqueous solutions (pH >10), the main form of dissolved ammoniacal nitrogen is the unionized free ammonia. Free ammonia, being a gaseous molecule, is easily stripped out from the solution. Increasing wastewater pH is frequently used to force ammonia removal. Herein, the effect of the variation of some physico-chemical characteristics of liquid cattle wastewater on ammonia ...

Nov. 30, 2016

By IWA Publishing

Autonomous water sampling and monitoring boat used in Black smelly water management - Case Study

Site: 9 rivers in Zhenjiang City（total 120km） Equipment: sample collection monitoring USV ESM30 OR MM70 Monitoring stations set up:each400m set up one station(total 310stations), monitoring under water surface 0.5m Monitoring project: Ammonia nitrogen and dissolved oxygen etc 7 parameters Result:Monitoring reports and the water quality distribution of 9 rivers, per month ...

May 14, 2018

By OceanAlpha Group Ltd.

USV assists in polluted water management by autonomous water sampling and monitoring - Case Study

Site: 9 rivers in Zhenjiang City（total 120km） USV: ESM30 & MM70 Monitoring points: We set up one monitoring point in every 400 meter, end up with 310 points in total, to monitor the water quality of 0.5m below surface. Target: To monitor 7 water quality parameters including ammonia nitrogen and dissolved oxygen. Result: USV assist generate monitoring reports and water ...

May 15, 2019

By OceanAlpha Group Ltd.

Ammonia-based aeration control with optimal SRT control: improved performance and lower energy consumption Proceedings ICA2017

Abstract: Ammonia-based aeration control (ABAC) is a cascade control concept for controlling total ammonia nitrogen (NHx-N) in the activated sludge process. Its main goals are to tailor the aeration intensity to the NHx-N loading and to maintain consistent nitrification, which meets effluent limits but minimizes energy consumption and improves nutrient removal. One limitation to ABAC is that the ...

Jan. 1, 2017

By inCTRL Solutions Inc.

Impact of fertilizer plant effluent on water quality

The impact of National Fertilizer Company of Nigeria outfall effluent on the physicochemistry and bacteriology of Okrika creek was investigated during the sampling period from May to December, 1998. The National Fertilizer Company of Nigeria outfall effluent, the Okrika creek water and the Ikpukulubie creek (control) water samples were collected. The physico-chemical parameters analyzed for all ...

Dec. 26, 2007

By Center for Environment and Energy Research & Studies (CEERS)

Comparison of different two-pathway models for describing the combined effect of DO and nitrite on the nitrous oxide production by ammonia-oxidizing bacteria

The aim of this work is to compare the capability of two recently proposed two-pathway models for predicting nitrous oxide (N2O) production by ammonia-oxidizing bacteria (AOB) for varying ranges of dissolved oxygen (DO) and nitrite. The first model includes the electron carriers whereas the second model is based on direct coupling of electron donors and acceptors. Simulations are confronted ...

Aug. 24, 2016

By IWA Publishing