Why We Blend Cultures Against Your Data Instead of Selling Catalogue Items
Why a bacterial culture for industrial effluent has to be selected or blended against your water, what the blend is solving, and what data we need before we can propose one.
This is the application engineering function at Shandong Jiuyi Biotechnology. Its work is to take a customer's operating data — effluent figures, reservoir conditions, house management, complaint history — and decide whether a biological route applies, which product family fits, and what dosing programme makes sense for that specific site.
Articles published under this byline are written from that casework. They describe the reasoning behind a specification rather than the product itself, because in practice the useful question is almost never 'which product' but 'what is actually failing, and why'.
Where a number would be needed to make a point, we say so and leave it out rather than publishing a figure we have not confirmed. Where a claim depends on conditions, we describe the conditions.
What this team works on
- Biological wastewater treatment
- Microbial culture selection and dosing
- Bioaugmentation and process recovery
- Hydrogen sulphide and odour control
- Livestock housing and manure microbiology
- Microbial enhanced oil recovery
Articles by Application Engineering
17 published.
Controlling Dog Odour Without Compromising the Dog
Reducing odour in kennels, dog housing and home multi-dog households, with attention to which methods are safe for the dog and which are not.
Bacteriophages: A Working Overview of the Biology and Where They Fit in Practice
An overview of bacteriophage biology: how phages attach and lyse, why host range is narrow, what a phage library contains, and how phage work differs from antibiotics.
Dosing Bacteria at a Wastewater Plant: How Much, How Often, and How to Know It Worked
How to calculate a bacterial culture dose, how often to repeat it, and which measurements tell you whether it is having an effect rather than whether it was delivered.
Storing Wastewater Bacteria: What Determines Shelf Life and How to Keep a Culture Usable
What determines the shelf life of a wastewater culture: carrier, moisture, temperature and storage time, and how to store a product between deliveries without losing activity.
Running Wastewater Biology in Cold Weather: Why Recovery Takes Longer and What to Do About It
Why nitrifying bacteria recover slowly in cold water, what the practical consequences are for a plant, and which interventions help and which waste time.
Engineering Treatment for Black Odour Water: Why It Happens and What Actually Removes It
Black odour in rivers, channels and receiving waters comes from organic load and low oxygen. What biological treatment can do, what it cannot do, and how to tell a treatable cause from a source that must be stopped.
Fermenting Livestock Manure: Turning a Storage Problem into a Product
How a manure fermentation agent affects a store or heap: the fermentation process, what it does for odour and stability, how to apply it, and where the limits are.
Fermentation Bedding Bacteria on Livestock Farms: How Bedding Culture Works in a Barn
How bedding cultures work in a livestock barn: the fermentation process in the bedding, what it does for odour and ammonia, how to establish it, and where it does not help.
Sophorolipid Biosurfactants in Oilfield Applications: Interfacial Tension, Mobility Control and Temperature Tolerance
How rhamnolipid-type and sophorolipid biosurfactants lower interfacial tension for enhanced oil recovery, and what salt and temperature tolerance means for reservoir application.
Engineered Phages: What a 2025 Review Says About Host Range, Resistance Reversal and Targeted Delivery
A summary of the 2025 peer-reviewed review 'Engineered Phages in Anti-Infection and Anti-Tumor Fields' (Microbial Pathogenesis, PMID 39442821) on host-range engineering, resistance reversal, antigen presentation and targeted delivery, and where 91bio's phage work sits.
Odour Control at Food Waste and Landfill Leachate Sites: How the Chemistry Decides the Product
Food waste and leachate odour is driven by ammonia, hydrogen sulphide and sulphur compounds. How botanical extracts and enzymes differ, and how to select and dose for transfer stations, food waste plants and landfill sites.
Where Pet Odour Comes From: Ammonia, Hydrogen Sulphide and Skatole
Pet odour comes from three main compounds — ammonia, hydrogen sulphide and skatole. Here is what each one is, how it forms, and which control route addresses it.
How Cat Litter Deodoriser Granules Work: Enzyme and Bacteria Deodoriser Partners
How cat litter deodoriser granules work: enzymatic breakdown of the odour molecules that form in used litter, what bacteria add, and how to choose and dose a granule product.
Bioaugmentation After a Treatment Plant Shock
What a shock load does to the sludge, what to dose and when, and realistic recovery timelines for a plant that has lost its biological activity.
Why Black Water Smells and How Biological Treatment Fixes It
Why black odour water forms, why aeration and chemical dosing alone often fail, and how biological treatment suppresses sulphide at the sediment source.
How to Choose a Wastewater Bacteria Culture for Your Treatment Plant
How to choose a wastewater bacteria culture: match the actual failure mode, check compatibility with existing biology, verify strain data and support.
Discuss your case with the team
Send the target parameter and the data you already have — you will be talking to the same people who write these articles.