Hydrogen Sulphide (H2S) in wastewater networks is present to some extent in almost every region in New Zealand. High levels of H2S can also be commonplace, posing several serious challenges to asset o
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These factors are all closely linked. If you have identified any one of these issues in your plant, it is likely to be related to or contributing to the cause of the others. They are also the cause
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Over the past two decades, Marlborough's wine industry has experienced significant expansion, with the region producing approximately 268 million litres of wine in 2022. Remarkably, for every litre of
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Three filamentous organisms can cause activated sludge foaming: Nocardia and Microthrix parvicella (commonly) and type 1863 (rarely).
Nocardial foam occurs as a thick, stable, brown foam or "scum" in
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When applied correctly bioaugmentation heavily benefits wastewater systems, and the addition of micronutrients adds to this performance.
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Fruit and vegetable processing plants generate large volumes of acidic wastewater that cannot be discharged without pretreatment.
The acidic waste from a fruit processing plant in the Pacific Northwe
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As cold temperatures close in, we get more and more samples coming in requesting treatment for M. parvicella foaming. But why does this filament seem to thrive in the winter?Microthrix parvicella is a
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For every gram of grease wastewater plants receive, a good percentage is made of hard-to-degrade long-chain fatty acids. To understand why long-chain fatty acid degradation is so tough, we must look a
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Nitrate is a sneaky molecule that is difficult to remove and can migrate quickly into groundwater. This leads to concerns for elevated nutrients in waterways and can compromise drinking water. Wastewa
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Does your lagoon system or wastewater treatment plant suffer from midge fly outbreaks? Midge flies, or chironomids, which resemble mosquitoes but don’t bite, commonly occur in wastewater treatment and
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Filaments can cause all sorts of headaches for wastewater operators such as foaming and bulking. These problems can lead to violations in wastewater limits and less efficient treatment. Bulking...
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Magnesium Hydroxide: Environmentally-Friendly and Cost-Effective Treatment for Odour and Corrosion in Sewer Lines
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A wastewater pond requires sufficient Dissolved Oxygen (DO) to satisfy Biological Oxygen Demand (BOD) and Nitrogenous Biochemical Oxygen Demand (NBOD). Without DO, a pond can experience odours, high e
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A wastewater pond requires sufficient Dissolved Oxygen (DO) to satisfy Biological Oxygen Demand (BOD) and Nitrogenous Biochemical Oxygen Demand (NBOD). Without DO, a pond can experience odours, high e
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Lagoons are usually thought of in the context of municipal wastewater treatment, however, they are also popular for many industries, such as fruit and vegetable, meat, dairy processing, and wineries.
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Biological treatment is the most efficient way of removing soluble compounds from wastewater. Until recent times, it was functionally the only way. Biological treatment is far more efficient and avail
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When confronted with new discharge consent requirements, many municipalities feel their only option is to decommission their otherwise adequate wastewater lagoon treatment system and replace it with a
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A meat processing wastewater lagoon can have a bad reputation because of the potential for sludge build-up and odour. However, a properly functioning meat processing wastewater lagoon, one with suffic
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Wastewater lagoon pH is a common testing parameter that is easily taken for granted. Dig a little deeper, however, and pH can give you valuable clues about what’s going on in your lagoon and help.....
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Lagoon dissolved oxygen, or DO, is the lifeblood of the wastewater lagoon system. The bacteria and other microbes that consume biological oxygen demand (BOD) need 1.5–2 lbs. of dissolved oxygen per...
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Biological Oxygen Demand (BOD) and Total Suspended Solids, or TSS, are standard testing parameters for wastewater lagoons. The ratio between the two numbers can provide valuable insight into........
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One of the benefits of lagoons for wastewater treatment is their built-in sludge storage, which reduces the need for sludge handling. However, every lagoon will eventually require dredging to........
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Here’s how we helped to remove an excess of 1,500m3 of wet sludge volume from an NZ municipal wastewater oxidation pond, within six months, using Parklink’s Advanced Microbial Digestion (AMD) system.
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Enhanced Microbial Digestion is the process of adding specific cultures of microorganisms to WSP in quantities sufficient to increase the average rate of hydrolysis, resulting in reduction of accumula
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Wet sludge volume, sludge solids concentrations and inert fraction of dry solids are the main considerations when quantifying or surveying the accumulated sludge in a WSP. All survey levels should be
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Denitrification is the conversion of soluble nitrate to nitrogen gas in the nitrogen cycle. For denitrification to occur, three factors are needed:
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Periodically checking the sludge levels in the WSP can be performed to assess sludge accumulation, and to assist with planning and budgeting for sludge removal. Ideally sludge depth profiles should...
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The term “bioaugmentation” for using a microbial additive to enhance a biological process is an apt one. Added microbes augment the existing biomass making it more stable and increasing its ability to
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With increased disinfecting protocols due to COVID-19, we are seeing large quantities of cleaning products reaching wastewater plants............
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The South Taranaki District Council is the first council to use an innovative scheme using bacteria for sludge removal in New Zealand from the Hawera wastewater treatment pond.
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