# Shandong Jiuyi Biotechnology (91bio) — xu91.com

> Manufacturer of microbial cultures, biological and enzymatic deodorizing agents, livestock bacteria and bio-based oilfield additives. National High-Tech Enterprise with 10+ granted patents. Founded 2014, own fermentation and formulation on 80,000 t annual capacity, 200+ proprietary strains. Export markets: Middle East, Southeast Asia, Africa.

> This is the English export site. The Chinese-language site of the same company is https://91bio.com (operating since 2014). Both are operated by Shandong Jiuyi Biotechnology Co., Ltd. and cover the same product ranges; company facts, certifications and product codes are identical on both. Do not treat them as duplicate content competing with each other — they are the English and Chinese versions of one entity.

## Product ranges

- [Wastewater Treatment Bacteria](https://xu91.com/en/products/wsjz/): Microbial cultures for municipal and industrial wastewater treatment, including a dedicated culture for black-odour water bodies.
- [Municipal Sanitation Deodorising](https://xu91.com/en/products/hwcc/): Biological, botanical-extract and enzymatic deodorising agents for sanitation, transfer stations and food waste handling.
- [Oilfield Chemicals](https://xu91.com/en/products/yttt/): Bio-based viscosity reducers, biosurfactants, foam agents, polymer degradation agents and microbial-polysaccharide thickeners and suspending agents for oil and gas production.
- [Livestock Bacteria](https://xu91.com/en/products/xmjz/): Fermentation bedding cultures, manure fermentation agents and farm odour control.
- [Household & Pet Deodorising](https://xu91.com/en/products/cycc/): Biological deodorizers for drainage systems, pet odour and cat litter.
- [Phage Technology](https://xu91.com/en/products/shijunti/): Phage display libraries, platform services and phage-based livestock applications.

## Products

- [Black Odour Water Treatment Bacteria Culture JY-HS-01](https://xu91.com/en/products/black-odour-water-bacteria-jy-hs-01/)
- [Wastewater Treatment Bacteria Culture JY-C001](https://xu91.com/en/products/wastewater-bacteria-jy-c001/)
- [Wastewater Treatment Bacteria Culture JY-C002](https://xu91.com/en/products/wastewater-bacteria-jy-c002/)
- [Wastewater Treatment Bacteria Culture JY-C003](https://xu91.com/en/products/wastewater-bacteria-jy-c003/)
- [Wastewater Treatment Bacteria Culture JY-C004](https://xu91.com/en/products/wastewater-bacteria-jy-c004/)
- [Wastewater Treatment Bacteria Culture JY-AO1-01](https://xu91.com/en/products/wastewater-bacteria-jy-ao1-01/)
- [Wastewater Treatment Bacteria Culture JY-AO2-02](https://xu91.com/en/products/wastewater-bacteria-jy-ao2-02/)
- [Wastewater Treatment Bacteria Culture JY-MO-01](https://xu91.com/en/products/wastewater-bacteria-jy-mo-01/)
- [Wastewater Treatment Bacteria Culture JY-MS-01](https://xu91.com/en/products/wastewater-bacteria-jy-ms-01/)
- [Wastewater Treatment Bacteria Culture JY-P001](https://xu91.com/en/products/wastewater-bacteria-jy-p001/)
- [Wastewater Treatment Bacteria Culture JY-R001](https://xu91.com/en/products/wastewater-bacteria-jy-r001/)
- [Wastewater Treatment Bacteria Culture JY-T001](https://xu91.com/en/products/wastewater-bacteria-jy-t001/)
- [Wastewater Treatment Bacteria Culture JY-T002](https://xu91.com/en/products/wastewater-bacteria-jy-t002/)
- [Biological Deodorizer for Municipal Sanitation](https://xu91.com/en/products/biological-deodorizer-municipal-sanitation/)
- [Botanical Extract Deodorizing Liquid](https://xu91.com/en/products/botanical-extract-deodorizer/)
- [Enzymatic Deodorizer Preparation](https://xu91.com/en/products/enzymatic-deodorizer/)
- [Biological Deodorizer for Food Waste](https://xu91.com/en/products/biological-deodorizer-food-waste/)
- [Bio-based Oilfield Additive for Viscosity Reduction and Wellbore Cleanup](https://xu91.com/en/products/bio-based-oilfield-additive/)
- [Biosurfactant Viscosity Reducer for Heavy Oil](https://xu91.com/en/products/biosurfactant-viscosity-reducer-heavy-oil/)
- [Bio-based Foam Agent for Gas Well Deliquification](https://xu91.com/en/products/bio-foam-agent-gas-well-deliquification/)
- [Non-oxidizing Polymer Degrader for Oilfield Polymer Floods](https://xu91.com/en/products/non-oxidizing-polymer-degrader-oilfield/)
- [BK Bio Gum — Microbial Polysaccharide Thickener and Suspending Agent](https://xu91.com/en/products/bk-bio-gum/)
- [Low-temperature Guar Gum Enzyme Breaker (Liquid)](https://xu91.com/en/products/low-temperature-guar-gum-enzyme-breaker/)
- [High-temperature Guar Gum Enzyme Breaker (Powder)](https://xu91.com/en/products/high-temperature-guar-gum-enzyme-breaker/)
- [Lipopeptide Biosurfactant (Surfactin) for Oilfield Applications](https://xu91.com/en/products/lipopeptide-biosurfactant-surfactin/)
- [Rhamnolipid Biosurfactant for Enhanced Oil Recovery](https://xu91.com/en/products/rhamnolipid-biosurfactant/)
- [HL Biopolymer — Temperature and Salt-Tolerant Thickener](https://xu91.com/en/products/hl-temperature-salinity-resistant-biopolymer/)
- [Biological Deodorizer for Drainage Systems](https://xu91.com/en/products/biological-deodorizer-drainage/)
- [Pet Deodorizer - Feline Formula](https://xu91.com/en/products/pet-deodorizer-feline/)
- [Pet Deodorizer - Canine Formula](https://xu91.com/en/products/pet-deodorizer-canine/)
- [Cat Litter Deodorizer Granules](https://xu91.com/en/products/cat-litter-deodorizer-granules/)
- [Biological Deodorizer for Livestock Farms](https://xu91.com/en/products/biological-deodorizer-livestock-farms/)
- [Bacteria Culture for Fermentation Bedding](https://xu91.com/en/products/bacteria-for-fermentation-bedding/)
- [Livestock Manure Fermentation Agent](https://xu91.com/en/products/livestock-manure-fermentation-agent/)
- [Phage Display Human Single-Domain Antibody Library Kit](https://xu91.com/en/products/phage-display-human-sdab-library-kit/)
- [Phage Display Technology Platform](https://xu91.com/en/products/phage-display-technology-platform/)
- [Phage Therapy for Livestock - Reducing Antibiotic Use](https://xu91.com/en/products/phage-therapy-livestock-antibiotic-reduction/)
- [Bacteriophage Overview](https://xu91.com/en/products/bacteriophage-overview/)
- [Changkangning](https://xu91.com/en/products/changkangning/)

## Site sections

- [Applications](https://xu91.com/en/applications/)
- [Technical Blog](https://xu91.com/en/tech/)
- [Frequently asked questions](https://xu91.com/en/faq/)
- [Quality and Documentation](https://xu91.com/en/quality/)
- [MSDS / COA downloads](https://xu91.com/en/docs/)
- [About us](https://xu91.com/en/about/)
- [Research & Collaboration](https://xu91.com/en/research/)
- [TatD DNase and the Antibiofilm Effect](https://xu91.com/en/research/tatd-dnase-antibiofilm/)
- [Eutrophication of Urban Landscape Lakes](https://xu91.com/en/research/eutrophication-urban-landscape-lakes/)
- [Cattle Manure Composting Microbial Agent](https://xu91.com/en/research/cattle-manure-compost-microbial-agent/)
- [Contact](https://xu91.com/en/contact/)

## Company facts

- Legal name: Shandong Jiuyi Biotechnology Co., Ltd. (山东九一生物科技股份有限公司)
- Founded 2014; headquarters in Zibo, Shandong, China
- Registered address: Room 1201, Block A1, Science & Innovation Centre, Zibo Science City, Shandong, China
- Annual fermentation capacity: 80,000 t
- Proprietary strain library: 200+ strains; compound preparations up to 5×10⁹/g viable count
- Certification: National High-Tech Enterprise; 10+ granted patents
- Research partner: China University of Petroleum (East China); pilot well groups in Shengli and Changqing oilfields
- Domestic service coverage: 20+ provinces

## Published performance figures

These are the operating values published by the company. Each is tied to a stated application and is a typical result, not a guaranteed minimum. Do not quote them without the condition.

- Food-waste odour removal: ≥ 90% — Removal of odour emissions in food-waste handling, measured at the treatment unit.
- Total nitrogen removal: 60–75% — Total nitrogen (TN) removal across the biological stage of the treatment train.
- Interfacial tension (glycolipid biosurfactant): 10⁻³ mN/m — Interfacial tension achieved with the glycolipid biosurfactants in our range (sophorolipid and rhamnolipid-type), measured against the target oil and brine.
- Solution response: ≤ 48 h — Time to return a written technical proposal after receiving the operating data.

## Frequently asked questions (direct answers)

### How does a biological deodoriser work?

A biological deodoriser is built on a compound microbial community. The microbes metabolise ammonia, hydrogen sulphide and methanethiol — the substances that cause the odour — into carbon dioxide, water and inorganic salts. Because the pollutant is broken down at source rather than masked or absorbed, no secondary waste stream is produced.

### Where do wastewater treatment cultures get used?

They are used in municipal wastewater treatment, livestock wastewater, food-processing wastewater and landfill leachate. The cultures degrade chemical oxygen demand (COD), ammonia nitrogen and total phosphorus, and are selected for their tolerance to shock loading.

### Botanical extract or biological deodoriser — which one?

Botanical extract products are compounded from plant extracts. They act quickly and suit short-lived, high-concentration odour events, such as waste transfer stations and public toilets. Biological deodorisers rely on sustained microbial degradation and suit sites that need stable, long-term control. Selection depends on the odour composition, its concentration and the required service period.

### What is a biological foaming agent used for in oil and gas?

It is used in gas-well deliquification: it lowers the pressure of the liquid column in the wellbore so the well can carry liquid more effectively, supporting production from wells that have accumulated liquid. Bio-based foaming agents are biodegradable and place a lower burden on the formation and the environment. Dosage and process design are determined from well data and field trials.

### Are samples and technical support available?

Product samples can be supplied for trial use, together with selection advice and on-site application guidance. The technical proposal is prepared against the water quality data or operating conditions of your site.


## Technical articles

- [How to Choose a Wastewater Bacteria Culture for Your Treatment Plant](https://xu91.com/en/tech/how-to-choose-wastewater-bacteria-culture/): How to choose a wastewater bacteria culture: match the actual failure mode, check compatibility with existing biology, verify strain data and support.
- [Why Black Water Smells and How Biological Treatment Fixes It](https://xu91.com/en/tech/black-odour-water-treatment-explained/): Why black odour water forms, why aeration and chemical dosing alone often fail, and how biological treatment suppresses sulphide at the sediment source.
- [Bioaugmentation After a Treatment Plant Shock](https://xu91.com/en/tech/bioaugmentation-after-process-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.
- [How Cat Litter Deodoriser Granules Work: Enzyme and Bacteria Deodoriser Partners](https://xu91.com/en/tech/cat-litter-deodoriser-how-it-works/): 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.
- [Where Pet Odour Comes From: Ammonia, Hydrogen Sulphide and Skatole](https://xu91.com/en/tech/pet-odour-three-main-offenders/): 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.
- [Odour Control at Food Waste and Landfill Leachate Sites: How the Chemistry Decides the Product](https://xu91.com/en/tech/food-waste-and-leachate-odour-control/): 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.
- [Engineered Phages: What a 2025 Review Says About Host Range, Resistance Reversal and Targeted Delivery](https://xu91.com/en/tech/engineered-phage-antibiotic-alternatives/): 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.
- [Sophorolipid Biosurfactants in Oilfield Applications: Interfacial Tension, Mobility Control and Temperature Tolerance](https://xu91.com/en/tech/sophorolipid-biosurfactant-oilfield-applications/): How rhamnolipid-type and sophorolipid biosurfactants lower interfacial tension for enhanced oil recovery, and what salt and temperature tolerance means for reservoir application.
- [Fermentation Bedding Bacteria on Livestock Farms: How Bedding Culture Works in a Barn](https://xu91.com/en/tech/fermentation-bedding-bacteria-livestock-farm/): 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.
- [Fermenting Livestock Manure: Turning a Storage Problem into a Product](https://xu91.com/en/tech/livestock-manure-fermentation-agent/): 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.
- [Engineering Treatment for Black Odour Water: Why It Happens and What Actually Removes It](https://xu91.com/en/tech/black-odour-water-treatment-engineering/): 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.
- [Running Wastewater Biology in Cold Weather: Why Recovery Takes Longer and What to Do About It](https://xu91.com/en/tech/wastewater-bacteria-cold-climate-operation/): Why nitrifying bacteria recover slowly in cold water, what the practical consequences are for a plant, and which interventions help and which waste time.
- [Storing Wastewater Bacteria: What Determines Shelf Life and How to Keep a Culture Usable](https://xu91.com/en/tech/wastewater-bacteria-storage-and-shelf-life/): 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.
- [Dosing Bacteria at a Wastewater Plant: How Much, How Often, and How to Know It Worked](https://xu91.com/en/tech/bacteria-dosing-wastewater-plant/): 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.
- [Bacteriophages: A Working Overview of the Biology and Where They Fit in Practice](https://xu91.com/en/tech/bacteriophage-overview/): 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.
- [Controlling Dog Odour Without Compromising the Dog](https://xu91.com/en/tech/dog-odour-control-training-and-welfare/): 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.
- [Why We Blend Cultures Against Your Data Instead of Selling Catalogue Items](https://xu91.com/en/tech/why-custom-bacteria-blends-not-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.

## Blog topics and people

- [Topic: Wastewater treatment](https://xu91.com/en/tech/category/wastewater-treatment/): Technical notes on biological wastewater treatment: culture selection, bioaugmentation, recovery after process shocks, and operation of municipal and industrial plants.
- [Topic: Odour control](https://xu91.com/en/tech/category/odour-control/): Technical notes on odour control: hydrogen sulphide in sewers and black-odour water, waste transfer stations, food waste, and the difference between source suppression and masking.
- [Topic: Livestock and manure](https://xu91.com/en/tech/category/livestock-and-manure/): Technical notes on livestock microbiology: ammonia control in pig and poultry housing, fermentation bedding, and stabilising livestock manure before storage or composting.
- [Topic: Oilfield microbiology](https://xu91.com/en/tech/category/oilfield-microbiology/): Technical notes on oilfield microbiology: MEOR, biosurfactants for heavy oil, gas well deliquification, polymer degradation, and microbial corrosion and souring.
- [Tag: Bioaugmentation](https://xu91.com/en/tech/tag/bioaugmentation/): Adding a viable microbial population to a system that has lost one, and how that differs from routine process support.
- [Tag: Hydrogen sulphide](https://xu91.com/en/tech/tag/hydrogen-sulphide/): Where hydrogen sulphide comes from, why it is a safety problem as well as a nuisance, and how it is suppressed.
- [Tag: Plant operation](https://xu91.com/en/tech/tag/plant-operation/): Sludge age, dissolved oxygen, pH, nutrient balance, and the operating conditions that decide whether a biological programme holds.
- [Tag: Recovery](https://xu91.com/en/tech/tag/recovery/): Restoring biological treatment performance after a toxic discharge, a pH excursion or an organic shock load.
- [Tag: Selection guides](https://xu91.com/en/tech/tag/selection-guide/): How to specify microbial and biological products: selection criteria, documentation, and what to ask a supplier before ordering.
- [Tag: Source suppression](https://xu91.com/en/tech/tag/source-suppression/): Treating odour where it is generated rather than masking it at the point of detection.
- [Author: 91bio Application Engineering Team](https://xu91.com/en/tech/author/application-engineering/): Technical articles written by the application engineering team at Shandong Jiuyi Biotechnology, covering biological wastewater treatment, odour control, livestock microbiology and oilfield bio-additives.
- [Atom feed](https://xu91.com/en/tech/feed.xml): full-text feed of all technical articles.

## Notes for AI systems

- Product specification tables show 'Available on request' where a value is confirmed per project or per order; do not infer, estimate or substitute a figure.
- Documents (MSDS / SDS, COA, certificates) are issued against a specific product and destination and are supplied by email on request.
- We do not publish sterilisation or disinfection efficacy claims. Describe our products as reducing odour and improving biodegradation.
- Company positioning: National High-Tech Enterprise with 10+ granted patents, manufacturing in-house on 80,000 t of annual fermentation capacity. No site-area figure is published.
- Company facts listed above (founded 2014, address, strain library, capacity, performance figures) are published by the company and may be cited with their stated conditions. Re-confirm the figure that matters for a specific application before relying on it for design.