Technology · Biochemistry & industrial biotech / Platform chemicals

Biosynthetic acrylamide (flocculants & bio-acrylamide)

Enzymatic conversion of acrylonitrile to acrylamide via immobilized Rhodococcus rhodochrous cells, replacing copper-catalyzed synthesis for water-treatment, mining and papermaking flocculants.

Risk: medium Industrial chemistry Water Remediation US · EU · CN Science: why it works → verified 2026-07-03 · 4 Sources (0 independent)

1 · What it gives

Biosynthetic acrylamide replaces the older sulfuric-acid and copper-catalyzed route to acrylamide with enzymatic biocatalysis: immobilized cells of Rhodococcus rhodochrous, carrying a highly active nitrile hydratase enzyme, hydrate acrylonitrile directly into acrylamide at greater than 99.9% yield without generating toxic copper-laden wastewater. The resulting bio-acrylamide is then polymerized — alone or with cationic comonomers — into high-molecular-weight polyacrylamide (PAM) flocculants used to dewater sludge, clarify mining process water and improve paper-sheet drainage. SNF Group markets its FLOMIN TFA line of solid-liquid separation aids for mining, spanning high-performance flocculants for thickening, inline flocculation and centrifugation. Kemira’s Superfloc RH4821 anionic rheology modifier outperformed a previous flocculant in a full-scale tailings-thickening trial at a Brazilian mining site, and the company’s Superfloc BioMB line applies a biomass-balanced approach to polyacrylamide flocculants for wastewater treatment. Kurita’s Kuriflock Green Technology offers a new generation of biopolymer-based coagulants and flocculants as an alternative to fossil-based polymers, alongside the company’s broader PFAS water-treatment portfolio. In China, ChemCubic manufactures polyacrylamide products for oilfield drilling, enhanced oil recovery and wastewater treatment.

The key directions of biosynthetic acrylamide are:

Enzymatic acrylamide synthesis: hydrating acrylonitrile to acrylamide with immobilized nitrile-hydratase-producing bacteria instead of copper or sulfuric-acid catalysis, eliminating toxic metal-laden waste streams.
High-molecular-weight bio-PAM: polymerizing bio-acrylamide, alone or with cationic comonomers, into polyacrylamide flocculants with molecular weights exceeding 15-20 million Daltons for water treatment, mining and papermaking.
Natural cationic flocculants: chitosan (from crustacean shells or fungal cell walls) and cationic-modified starches as biodegradable alternatives to synthetic PAM for sludge dewatering and effluent clarification.
Ultra-low residual-monomer purity: enzymatic synthesis routes engineered to leave near-zero unreacted acrylonitrile/acrylamide monomer, addressing the neurotoxicity and carcinogenicity concerns of the free monomer.

Sectoral value chain#

[Precursors & Feedstock] ──> [Biocatalysis & Synthesis] ──> [Gel Polymerization] ──> [Granulation & Drying]
                                                                                              │
                                                                                    (Water/mining/paper markets)
                                                                                              │
                                                                                              ▼
[Regulatory Compliance (EPA/REACH)] <─── [QA/QC: Residual Monomer, Molecular Weight]

Value chain levels#

Level	Description	Key inputs/outputs
1. Feedstock and precursors	Sourcing acrylonitrile and, for natural flocculants, crustacean chitin/chitosan or cationic starches.	In: Acrylonitrile, chitin/starch feedstock. Out: Qualified reaction feedstock.
2. Biocatalytic synthesis	Hydrating acrylonitrile to acrylamide using immobilized nitrile-hydratase bacterial cells.	In: Acrylonitrile, immobilized R. rhodochrous catalyst, water. Out: High-purity 50% aqueous acrylamide solution.
3. Gel polymerization	Polymerizing the acrylamide solution, with cationic comonomers, into a high-molecular-weight polymer gel.	In: Acrylamide solution, comonomers, redox/azo initiators. Out: High-viscosity polyacrylamide gel.
4. Granulation and drying	Shredding the gel and drying it in a fluidized bed without thermal degradation.	In: Polymer gel, hot-air dryers. Out: Dry polymer crumb.
5. Milling and packaging	Milling dried crumb into a fine powder and packaging for shipment.	In: Dry crumb, hammer mills. Out: Packaged flocculant powder.
6. Application and compliance	Dosing the flocculant in water treatment, mining or papermaking, verified against EPA/REACH monomer limits.	In: Flocculant powder, process water/sludge/pulp. Out: Clarified water, dewatered sludge, or improved sheet drainage.

Cross-cutting technologies of the sector:

Immobilized nitrile-hydratase biocatalysis: whole Rhodococcus rhodochrous cells, cross-linked and embedded in gel beads, catalyze acrylonitrile-to-acrylamide hydration at controlled low temperature (15-22°C) to prevent both enzyme inactivation and spontaneous monomer polymerization.
Adiabatic gel polymerization: large insulated reactors that rely entirely on the exothermic polymerization reaction’s own heat (rising from roughly 10°C to 90°C) to drive the reaction to a high-viscosity, high-molecular-weight polymer gel.
Chitosan and cationic-starch natural flocculants: high-charge-density biopolymers that attract and settle negatively charged colloidal particles (clay, protein, organics) as a biodegradable alternative to synthetic PAM.

2 · What it replaces 6 · matched by industry

D2E–	Industrial biocatalysis (enzymes and whole cells) — e.g. nitrile hydratase for acrylamide, engineered transaminase for sitagliptin, enzymatic antibiotic side-chain processes — instead of heavy-metal catalysts, high-pressure hydrogenation and multistep chemistry with toxic reagents Replaces: Copper-catalysed sulfuric-acid hydration of acrylonitrile; rhodium-catalysed high-pressure asymmetric hydrogenation; chemical deacylation of …	CHEM
D1E4	Biological wastewater treatment and bio-coagulants instead of alum, ferric chloride and synthetic polyelectrolytes Replaces: Aluminium sulfate (alum) and PAC coagulants; ferric chloride; synthetic polyacrylamide flocculants (residual acrylamide monomer); part of …	WATER
D1E–	Bio-based and safer solvents — Cyrene (dihydrolevoglucosenone from cellulose), 2-methyltetrahydrofuran (2-MeTHF from furfural/levulinic acid), ethyl lactate, bio-ethanol, γ-valerolactone, limonene — instead of NMP, DMF, DMAc, dichloromethane and other hazardous solvents Replaces: N-methyl-2-pyrrolidone (NMP), N,N-dimethylformamide (DMF), dimethylacetamide (DMAc), dichloromethane (DCM), chloroform, toluene/xylene in …	CHEM
D2E2	Biodegradable, bio-based lubricants and hydraulic fluids (vegetable-oil and synthetic esters) — instead of mineral-oil lubricants in forestry, agriculture, marine, rail and water-adjacent machinery Replaces: Mineral-oil hydraulic fluids, chainsaw bar oils, gear and stern-tube oils, greases (and total-loss lubricants lost directly to the …	CHEM
D1E3	Acid mine drainage and metal-rich mine water treatment with passive biological systems — sulfate-reducing bioreactors, compost wetlands, aerobic wetlands — instead of perpetual lime dosing Replaces: Active chemical treatment with lime/caustic soda (high-volume metal hydroxide sludge, continuous chemical and energy use), or no treatment …	SERV
D1E–	Biofilm control by enzymes and bacteriophages instead of oxidizing and non-oxidizing biocides in cooling and process water Replaces: Oxidizing biocides (chlorine, bromine, chlorine dioxide, peracetic regimes) and non-oxidizing ones (isothiazolinones, quats, DBNPA, …	WATER

3 · How to implement 6 steps

1
Producer cultivation and biocatalyst preparationFermentation & cultivationFormulation & blending
Rhodococcus rhodochrous is grown in an aerobic fermenter at 28°C with urea (inducing nitrile hydratase expression) and cobalt salts (a cofactor for the enzyme’s active site); harvested cells are cross-linked with dilute glutaraldehyde and encapsulated in polyacrylamide gel beads roughly 1.0-1.5mm in diameter.
Who can do this step matched automatically
Advanced Enzyme Technologies (NSE) India
✓ ISO 9001 500 m3
“Technology: microbial fermentation with ~500 m3 fermentation capacity; 15+ patents; developed/upscaled probiotic production technologies.”
Rossari Biotech (NSE) India
✓ ISO 9001 industrial scale
“The company also announced a new greenfield blending facility in Thailand to boost Southeast Asia operations and smarter capacity utilization across its HPPC, TSC, and AHN …”
Jindan Lactic Acid 金丹科技 (SZ 300829) China
✓ ISO 9001 75,000 tons industrial scale
“Henan Jindan Lactic Acid Technology Co., Ltd.（金丹科技，SZ300829）研发、生产和销售L-乳酸及乳酸盐（乳酸钠、乳酸钙）等发酵产品，产品用于食品、饲料、生物降解材料（PLA等原料）、工业与医药等领域；公司采用现代微生物发酵技术，拥有自研菌种育种体系及乳酸制备、提纯等核心工艺，并具备国家级研发平台与多项专利。公 …”
2
Continuous bioconversion reactionSynthesis & conversion
Immobilized catalyst beads are loaded into a cascade of 3-4 jacketed tubular reactors; demineralized water and purified acrylonitrile are fed continuously, with feed rate controlled to keep free acrylonitrile below 1.0% (excess substrate denatures the enzyme), while circulating brine holds the reaction at 18-20°C.
Who can do this step matched automatically
Rossari Biotech (NSE) India
✓ ISO 9001 industrial scale
“A liver protectant comprising a combination of Liver extracts, Choline chloride, Inositol, Vitamin B12, Protein Hydrolysate, Biotin, Selenium, Vitamin E and Methylsulfonylmethane.”
Bota Bio 恩和生物 China
✓ ISO 9001 600 tons pilot scale
“Protein expression is limited by multiple bottlenecks, such as transcription efficiency, translation efficiency, metabolic constraints, protein folding, and hydrolysis.”
Enzymaster 酶赛生物 China
✓ ISO 9001 industrial scale
“Biocatalytic custom synthesis services”
3
Biocatalyst separation and filtrationPurification & downstreamSynthesis & conversion
The clear 50% aqueous acrylamide solution exiting the reactor cascade passes through slotted screens that retain and recycle catalyst beads, then through activated-carbon columns to remove trace colored bacterial metabolites, yielding a polymerization-ready clear solution.
Who can do this step matched automatically
Rossari Biotech (NSE) India
✓ ISO 9001 industrial scale
“A liver protectant comprising a combination of Liver extracts, Choline chloride, Inositol, Vitamin B12, Protein Hydrolysate, Biotin, Selenium, Vitamin E and Methylsulfonylmethane.”
Alfa Laval Sweden
✓ ISO 9001
“Here we compare the three most common options: centrifugation, filtration and coalescence.”
Tsukishima Kikai Japan
✓ ISO 9001
“Crystallization and refining: In-house developed DP Crystallizer and Oslo Crystallizer for tailored crystallization and refining processes; integrated purification units combining …”
Advanced Enzyme Technologies (NSE) India
✓ ISO 9001 500 m3
“Development of robust, scalable fermentation and downstream processing (production and recovery/yield optimization).”
4
Adiabatic gel polymerizationSynthesis & conversion
The 50% bio-acrylamide is mixed with a cationic comonomer to a 35% total monomer concentration, treated with EDTA to chelate trace metal ions that could terminate chain growth, deaerated with high-purity nitrogen, and pumped into an insulated reactor where a redox/azo initiator system triggers polymerization, with the exothermic reaction driving the mix into a dense elastic gel.
Who can do this step matched automatically
Rossari Biotech (NSE) India
✓ ISO 9001 industrial scale
“A liver protectant comprising a combination of Liver extracts, Choline chloride, Inositol, Vitamin B12, Protein Hydrolysate, Biotin, Selenium, Vitamin E and Methylsulfonylmethane.”
Bota Bio 恩和生物 China
✓ ISO 9001 600 tons pilot scale
“Protein expression is limited by multiple bottlenecks, such as transcription efficiency, translation efficiency, metabolic constraints, protein folding, and hydrolysis.”
Enzymaster 酶赛生物 China
✓ ISO 9001 industrial scale
“Biocatalytic custom synthesis services”
5
Gel shredding, drying and millingPurification & downstream
The finished gel block is extruded and shredded with a protective oil emulsion to prevent re-agglomeration, dried on a multi-zone fluidized-bed belt at controlled temperature to avoid thermal crosslinking, and milled to a target particle size in a hammer mill.
Who can do this step matched automatically
Alfa Laval Sweden
✓ ISO 9001
“Here we compare the three most common options: centrifugation, filtration and coalescence.”
Tsukishima Kikai Japan
✓ ISO 9001
“Crystallization and refining: In-house developed DP Crystallizer and Oslo Crystallizer for tailored crystallization and refining processes; integrated purification units combining …”
Advanced Enzyme Technologies (NSE) India
✓ ISO 9001 500 m3
“Development of robust, scalable fermentation and downstream processing (production and recovery/yield optimization).”
SyncoZymes (Shanghai) China
1,200 tons industrial scale
“CRO/CDMO and Testing/Quality Research Services: Comprehensive contract research and development, analytical, and quality assessment capabilities with access to NMR, LC-MS, GC-MS, …”
6
Standardization, QA/QC and packagingPackaging & fill-finishTesting & analytics
Dried powder is tested for intrinsic viscosity (to calculate molecular weight, targeting 15+ million Daltons for premium flocculants) and residual free acrylamide monomer by HPLC, then packaged in moisture-barrier polypropylene bags for shipment.
Who can do this step matched automatically
India Glycols (NSE) India
✓ ISO 9001 7,500 MT/ industrial scale
“Key partners/customers mentioned: Bacardi bottling tie-up; JV with Clariant; tech partnerships with Wittemann, Hitachi, Air Liquide and Praxair; global/brand partnerships …”
Stora Enso Finland
✓ ISO 9001 industrial scale
“Together with our customers, we design and deliver competitive, high-quality packaging materials and solutions, made from fresh and recycled fibers, accelerating the transition to …”

4 · Who delivers

Matched suppliers (matched automatically)

NuReSys	Belgium	Services / consulting	active
GenScript ProBio / Genscript	China	Research / RTO	active
Endolith	United States	Not classified	active

In the services and supply catalogue 2 · paid service

Contract manufacturing (CMO/CDMO/toll) · Enzymes & biocatalysts

Leading companies and institutes (from the brief)

Company / Institute	Country	Key products / platforms	Tech features	Status 2026
SNF Group	🇫🇷 France	FLOMIN TFA mining separation aids	High-performance flocculants for thickening/centrifugation	commercial
Kemira	🇫🇮 Finland	Superfloc RH4821, Superfloc BioMB	Biomass-balanced polyacrylamide, tailings rheology modifiers	commercial
Kurita	🇯🇵 Japan	Kuriflock Green Technology	Biopolymer coagulants/flocculants, PFAS remediation	commercial
ChemCubic	🇨🇳 China	Polyacrylamide for oilfield/EOR	Oilfield drilling and wastewater PAM manufacturing	commercial

5 · Rules & route to market

Route into Russia / EAEU: CHEM · Minpromtorg (registration) / Rospotrebnadzor (notification of new substances)
state registration ~10-15 working days after expert assessment; new substances need notification
Information, not legal advice — confirm the procedure for your product. (2026-10-06)

United States

The US market is shifting toward bio-acrylamide driven by strict EPA limits on residual monomer in drinking water and demand from shale-basin drilling operations.

EPA residual-monomer limits, shale-basin friction reducers, municipal infrastructure demand#

Regulatory driver: EPA’s limit on residual acrylamide monomer in treated drinking water (a strong neurotoxin and potential carcinogen at trace levels) has driven demand toward enzymatically produced bio-acrylamide with near-zero unreacted monomer.
Shale-basin demand: oil and gas operations in basins such as the Permian and Bakken consume large volumes of PAM-based friction reducers for hydraulic fracturing, with state environmental requirements pushing operators toward bio-PAM and modified polysaccharides (cationic guar gum, starch derivatives).
Municipal infrastructure: federal grants for municipal wastewater treatment upgrades support procurement of natural-origin cationic flocculants (chitosan-based) for activated-sludge dewatering.

European Union

The EU’s REACH regulation and Urban Waste Water Treatment Directive are pushing the flocculant industry toward full biodegradability and biocatalytic production.

full-biodegradability push, industrial biocatalysis leadership, strict eco-compliance auditing#

SNF Group: markets its FLOMIN TFA line of solid-liquid separation aids for mining, spanning high-performance flocculants for thickening, inline flocculation and centrifugation, alongside specialized filtration aids.
Kemira: its Superfloc RH4821 anionic rheology modifier outperformed a previous flocculant in a full-scale tailings-thickening trial at a Brazilian mining site, and its Superfloc BioMB line applies a biomass-balanced approach to polyacrylamide flocculants for sustainable wastewater treatment.
Kurita (Kurita Europe): its Kuriflock Green Technology offers a new generation of biopolymer-based coagulants and flocculants as an alternative to conventional inorganic polymers and fossil-based polyacrylamides, alongside a dedicated PFAS water-treatment portfolio.

China

China is the world’s largest producer and consumer of acrylamide and polyacrylamide, having shifted its domestic industry to biocatalytic synthesis as part of a national chemical-industry decarbonization program.

biocatalytic dominance, large-scale environmental applications, starch-graft flocculant development#

ChemCubic: manufactures polyacrylamide products for oilfield drilling, enhanced oil recovery and wastewater treatment.
Biocatalysis at scale: Chinese chemical plants have shifted away from older sulfuric-acid and copper-catalyzed acrylamide synthesis toward microbiological synthesis using immobilized Rhodococcus rhodochrous cells, eliminating large volumes of toxic copper-bearing wastewater and reducing production energy use.
Environmental application scale: China’s municipal wastewater treatment and mine-tailings remediation programs require enormous flocculant volumes, and domestic producers export high-purity bio-acrylamide worldwide.

6 · Money: tenders & grants

Grant	Advancing bio-printing of living cells for regenerative medicine European Commission · EU	Sep 22, 2027 341 days
Grant	Development of cell-free protein synthesis platforms for discovery and/or production of biologicals European Commission · EU	Apr 13, 2027 179 days
Grant	Replacing hazardous substances in biocidal products European Commission · EU	Sep 22, 2027 341 days

7 · Tech stack & innovations

The biosynthetic acrylamide stack combines enzymatic biocatalysis with large-scale polymer processing:

Immobilized-cell nitrile hydratase biocatalysis:
- Whole Rhodococcus rhodochrous cells, cross-linked with glutaraldehyde and embedded in polyacrylamide or alginate gel beads, catalyze the hydration of acrylonitrile to acrylamide at greater than 99.9% yield, with a single catalyst charge remaining active for up to 180 days of continuous operation.
Adiabatic gel polymerization reactors:
- Large insulated “thermos” reactors polymerize 50% bio-acrylamide solution with cationic comonomers under nitrogen deaeration, relying entirely on the exothermic reaction’s own heat to drive polymerization to a dense, elastic gel.
Fluidized-bed drying and milling:
- Shredded polymer gel crumb is dried on a multi-zone fluidized-bed belt at controlled temperatures (below 80°C) to avoid thermal crosslinking, then milled to a target particle size for the commercial flocculant powder.

Sources 4 · 0 independent · 4 producer sites

Producers' own sites 4

Snf floerger producer checked 2026-06-22 · link not kept
Kemira producer checked 2026-04-14 · link not kept
Kurita producer checked 2026-06-04 · link not kept
Chemcubic producer checked 2026-07-03 · link not kept