Monitoring & Testing Articles

  • Keeping hygiene front of mind

    Hygiene is drummed into us from a young age. It usually starts with the more unsavoury lessons – like don’t pick your nose – and gradually migrates to the importance of showers, deodorant and good sexual health. It’s only when some of us dedicate themselves to caring for others do we fully appreciate how important hygiene is. In a good hospital robust ...


    By DDC Dolphin Ltd

  • Quantification of leakage in batch biogas assays

    Avoiding leaks is essential for accurate measurement of biogas production by batch assays. Here we present a simple method for detecting leaks and correcting results, based on the change in bottle mass during incubation. Three experiments were carried out using pure chemicals, wastewater sludge, and other complex substrates to test and demonstrate the method, and leaks were detected in all ...


    By IWA Publishing

  • Full scale optimisation of sludge dewatering and phosphate removal at Harnaschpolder wwtp (The Hague, NL)

    At Harnaschpolder wwtp phosphate removal from wastewater and sludge dewatering is optimised by dosing magnesium hydroxide to digested sludge. To optimise sludge dewatering and phosphate removal, a full-scale test has been executed since August 2015 using temporary equipment. In this test magnesium hydroxide is added to the digested sludge buffer. Significant positive results are achieved. An ...


    By IWA Publishing

  • Public finance for water infrastructure development and its practical challenges for small towns

    The small and fluctuating population, the economic characteristics and administrative capacity of small towns not only pose infrastructural challenges for providing services, but also limit the possibilities for generating local revenues for financing water infrastructure development and maintenance. This limited ability to generate local resources for water infrastructure is exacerbated by ...


    By IWA Publishing

  • NEO Monitors conquers the Quasi-impossible

    China is a world factory powered by its abundant coal resource. China is facing a huge environmental challenge brought together with the fossil-fired power plants. China has therefore been conducting technical retrofit to the engines of its economy, by introducing emission control facilities. Selective Catalytic Reduction (SCR) technology is one of the most widely applied emission control ...


    By NEO Monitors AS

  • Vacuum sewerage systems – a solution for fast growing cities in developing countries?

    Developed more than a century ago, the potential of vacuum sewerage systems remains underexploited. At the same time, the rapid urbanization in Asia brings about major challenges for municipal utilities. In this context, the GIZ (Deutsche Gesellschaft fuer Internationale Zusammenarbeit) project ‘Integrated Resource Management in Asian Cities: the Urban Nexus’ gives technical advice to ...


    By IWA Publishing

  • Could EB irradiation be the simplest solution for removing emerging contaminants from water and wastewater?

    Newly observed presence of ‘emerging contaminants’, defined also Compounds of Emerging Concern, chemicals without regulatory status and which impact on environment and human health are poorly understood has been amply reported in wastewater and aquatic environments. ‘Conventional’ water pollutants have been described for decades and their impact on human health and the environment are known; ...


    By IWA Publishing

  • A conceptual model for decentralized municipal wastewater management

    This paper proposes a conceptual model for selecting the centralization level for wastewater management in urban areas, which is associated with main sewage collectors and wastewater treatment facilities. The model is supported in the Analytical Hierarchy Process (AHP) and Cost-Benefit Analysis. Additionally, the model is based on the results of variables and indicators ...


    By IWA Publishing

  • Match, don't mix: implications of institutional and technical service modalities for water governance outcomes in south Indian small towns

    This paper seeks to contribute to the limited literature on water governance in small towns in India. For assessing water governance, we propose a broad framework encompassing adequacy and affordability, equity, sustainability and responsiveness. Analytically, the concept of ‘service modality’ is expanded to include not only institutional arrangements but also water resource deployment, and ...


    By IWA Publishing

  • Organic matter removal in bio-filters to achieve biologically stable water downstream of the process

    Organic removal contaminants reclamation has increased over the past years as it has many advantages over other treatments. Product water from water treatment plants can be chemically complex resulting in physical and biological changes during transportation in the distribution systems. The general aim of this study was to evaluate the effectiveness of biofilters for reducing the concentration ...


    By IWA Publishing

  • Monitoring for the golden balance

    On Herøya in Porsgrunn, Yara has an ammonia plant, three nitric acid plants and a calcium nitrate plant. Together the plants produce a wide range of fertilizers that meet the requirements for fertilization ...


    By NEO Monitors AS

  • Sodium chloride as a tracer for hydrodynamic characterization of a shallow maturation pond

    The results of tests with a sodium chloride tracer in a shallow maturation pond in Brazil are presented. The pond – a full-scale effluent treatment unit for around 250 p.e – was 0.80 m deep with a length/width ratio of 4.3:1, and had accumulated sludge for 12 years to about 40% of the total volume. The pond is subject to daily cycles of thermal stratification/destratification, as shown by ...


    By IWA Publishing

  • Odour control: A successful experience in sorocaba city – Brazil

    Public concern over odours from sewage treatment facilities have been increasingly significantly in Brazil in recent years due to urban developments around existing plants or construction of new ones. The city of Sorocaba is an example where the expansion of the sewage collection and treatment system has increased and consequently more people have been exposed to bad odours. Due to this ...


    By IWA Publishing

  • Comparative analysis of two low cost point-of-use water treatment systems

    The study examined two low-cost point-of-use water treatment systems developed in respect of bacterial and particulate removal when exposed to surface water for three months. Bacterial removal efficiency was estimated using E. coli and fecal coliforms, while particulate reduction efficiency was estimated by determining turbidity and total suspended solids (TSS). The systems investigated were ...


    By IWA Publishing

  • Critical pieces in a big puzzle

    Dynea is one of the world’s leading producers of adhesives for industrial use, particularly for the wood and paper industry, but also for rock wool and glass fibre products. The company has been an important ...


    By NEO Monitors AS

  • Saves Time and Money

    Through its subsidiaries, they mainly operate in four business segments: oil, chemical, lubricant and R & D. ...


    By NEO Monitors AS

  • Modelling of biochemical oxygen demand from limited water quality variable by ANFIS using two partition methods

    This paper aims to: (1) develop models based on adaptive neuro-fuzzy inference system (ANFIS) able to predict five-day biochemical oxygen demand (BOD5) in Ouizert reservoir; (2) demonstrate the capability of the ANFIS in the practical issues of water quality management; (3) choose the optimal combination of input variables to improve the model performance; (4) compare two ANFIS partition ...


    By IWA Publishing

  • A research on shape-controllable synthesis of Ag3PO4/AgBr and its degradation of ciprofloxacin

    Antibiotic ciprofloxacin is one of the commonly used broad spectrum fluoroquinolone human and veterinary drugs. Because of the overuse of human beings, the presence of ciprofloxacin has been detected in a variety of environmental matrices. To solve this problem, a facile, environmentally-friendly Ag3PO4/AgBr composite photocatalyst was synthesized by a simple precipitation method at room ...


    By IWA Publishing

  • Chemical stress from Fe salts dosing on biological phosphorus and potassium behavior

    In simultaneous precipitation, interaction between chemical and biological P removal could not be ignored. This work investigated effects of ferrous sulfate and Fe precipitates on metabolic behavior of bio-P and its counter cation of potassium. After dosing, mixed liquid suspended solids (MLSS) increased 9%, pH decreased from 7.35 to 7.00, sludge volume index (SVI) decreased, electrical ...


    By IWA Publishing

  • Online biofilm monitoring by HydroBio® Advance in an open cooling water system

    Download our new case study (CS 134) and learn how HydroBio® Advance optimized the biocide programme and improves the full plant efficiency through: Control of microbiological status with online biofilm monitoring. Optimization of the biocide treatment. Successful deposit control and so clean system. ...


    By Kurita

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