Why Pork Binagoongan Has the Most Intense Fermented Odour of Any Filipino Pork Dish
Pork binagoongan — pork belly (liempo) or pork shoulder sautéed and braised in bagoong alamang (fermented shrimp paste), typically with garlic, onion, tomatoes, and eggplant — is the Filipino dish where bagoong alamang is the primary cooking sauce rather than a table condiment. In kare-kare, bagoong is served on the side and may or may not end up on the carpet with the main stew. In binagoongan, every component of the dish is saturated with fermented shrimp paste. The shrimp paste fermentation produces trimethylamine (TMA — the primary fishy amine), dimethylamine, ammonia, and a range of biogenic amines (histamine, tyramine, putrescine) from the breakdown of shrimp proteins during the weeks-long salt fermentation process. When binagoongan spills on carpet, this complex amine mixture adsorbs deeply into the carpet fibres and is the most persistent odour component of any Filipino pork stew. The visible stain is secondary — the fermented shrimp odour is the primary reason an effective treatment sequence is needed.
The Stain Components in Pork Binagoongan
- Bagoong alamang fermented amine odour (TMA, dimethylamine, biogenic amines from the fermented shrimp paste) — the dominant treatment challenge; enzyme step for the fermented protein substrate; overnight baking soda for odour absorption; white vinegar rinse for TMA neutralisation
- Shrimp astaxanthin (the keto-carotenoid that gives bagoong its pink-orange-red colour) — fat-soluble; responds to H2O2
- Pork belly fat (high — liempo is 30-40% fat; two baking soda rounds)
- Pork protein (myoglobin — cold water urgency; enzyme)
- Tomato lycopene (from the tomatoes in the dish, if included) — H2O2
- Eggplant anthocyanins (from the eggplant in the dish, if included) — H2O2
- Garlic and onion volatile organics — no persistent pigment; fade naturally
- Shrimp protein from the bagoong (fermented krill/shrimp — Acetes japonicus) — enzyme step alongside the pork protein
- Salt from the fermentation (bagoong is heavily salted) — water-soluble; cold water rinse removes
The bagoong odour requires a two-step approach — enzyme AND overnight baking soda
Bagoong alamang fermented amine odour is more persistent than any other Filipino stew odour component. The enzyme step digests the fermented shrimp protein matrix that carries the volatile amines and partially reduces the odour. However, enzyme treatment alone is not sufficient — the volatile amine compounds (TMA, biogenic amines) remain adsorbed in the carpet fibres after the protein substrate is digested. Baking soda applied overnight (minimum 8 hours) after all wet treatment steps are complete is essential to adsorb the residual volatile amines. A second overnight baking soda application the following night resolves the most stubborn odour cases.
Step-by-Step Treatment
- Remove pork belly pieces and eggplant from the carpet with a spoon; do not press bagoong-saturated pieces into the pile
- Apply cold water and blot vigorously; the bagoong will colour the blotting cloth pink-orange from the shrimp astaxanthin
- Continue cold water blotting for 60 seconds to dilute the fermented shrimp paste and begin removing the salt
- Apply dry baking soda generously and press firmly into the pile; leave 30 minutes for the first round of pork belly fat absorption
- Vacuum; apply a second baking soda round for 25 minutes; vacuum again — the high pork belly fat load requires two rounds
- Apply a cold-water protease enzyme solution and work thoroughly into the fibres; leave 30 minutes — this is the longest enzyme dwell of any Filipino dish treatment, needed to digest both the fermented shrimp protein and the pork protein
- Blot, rinse cold, blot dry
- After a colourfast test on a hidden section, apply 3% hydrogen peroxide across the full stain
- Leave H2O2 for 10 minutes, blot, rinse cold, allow to dry fully; targets the shrimp astaxanthin, tomato lycopene, and eggplant anthocyanins
- After the H2O2 has dried, apply diluted white vinegar (1 part vinegar to 3 parts water) across the stain area; leave 10 minutes and blot — the acetic acid neutralises the alkaline TMA amine directly
- Rinse with cold water; blot dry
- Apply dry baking soda generously overnight (minimum 8 hours); vacuum the next morning
- If fermented odour persists, apply a second overnight baking soda application the following night
How Pork Binagoongan Compares to Kare-Kare with Bagoong
Both pork binagoongan and pork kare-kare with bagoong involve bagoong alamang on carpet. The critical difference is concentration. In kare-kare, the bagoong is a small-volume condiment served on the side — it may or may not mix into the main stew on the carpet during a spill. In pork binagoongan, the entire dish is cooked in bagoong — every gram of the pork, sauce, eggplant, and tomato is permeated with fermented shrimp paste at a much higher concentration than a kare-kare bagoong drizzle. A binagoongan spill has approximately 5–10 times the bagoong concentration per volume of stain compared to a kare-kare spill where the bagoong mixed in. This is why binagoongan requires the extended 30-minute enzyme dwell and two overnight baking soda applications, while kare-kare with bagoong typically needs only one overnight application.
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Frequently asked
What is the difference between bagoong alamang and bagoong isda as a carpet stain?
Bagoong alamang is fermented small shrimp or krill (Acetes japonicus) — this is what is used in pork binagoongan and served with kare-kare. Bagoong isda is fermented fish paste (typically made from anchovies, sardines, or other small fish — Stolephorus spp. or Sardinella spp.). Both are highly fermented with intense amine odour, but bagoong isda has higher TMA concentration from the fish proteins (fish have more TMA oxide precursors than shrimp) and a more intensely fishy smell. For carpet treatment, bagoong isda requires the same sequence as bagoong alamang but with a longer vinegar step (12 minutes rather than 10) due to the higher TMA concentration. The astaxanthin from shrimp is replaced by fish carotenoids in bagoong isda — both respond to H2O2.
The pork binagoongan was made with ginisang bagoong (sautéed) rather than raw bagoong — does that help?
Significantly — ginisang bagoong (bagoong alamang sautéed with garlic, onion, tomato, and sometimes sugar or vinegar) has a substantially reduced amine odour compared to raw bagoong. The sautéeing process (cooking at 150–180°C for several minutes) volatilises a significant proportion of the TMA and biogenic amines, and the caramelisation of the onions and tomatoes produces Maillard compounds that partially mask the remaining fermented amine notes. For binagoongan made with ginisang bagoong: one overnight baking soda application is typically sufficient rather than two; the vinegar step is still recommended (7 minutes) but is less critical. The enzyme step remains at 25–30 minutes since the fermented shrimp protein substrate is still present regardless of the cooking stage.
Does adding eggplant to binagoongan make the stain worse?
Slightly — the eggplant in binagoongan adds purple eggplant anthocyanins (water-soluble pigment from the eggplant skin — delphinidin glucosides) to the stain. The anthocyanins respond to H2O2 in one round and are a minor additional target alongside the shrimp astaxanthin. The eggplant also adds some eggplant moisture to the sauce, slightly increasing the spread of the bagoong across the carpet. If the eggplant pieces are removed promptly (before pressing), the anthocyanin contribution is minimal. Binagoongan without eggplant (pure pork and bagoong sauce) has essentially identical treatment requirements minus the anthocyanin H2O2 target.
The fermented smell is very strong — is professional treatment necessary?
A large pork binagoongan spill that has soaked into the carpet underlay is beyond the reach of surface treatment alone. If the carpet still smells strongly after two overnight baking soda applications and the vinegar TMA neutralisation step, the bagoong amine compounds have likely penetrated into the underlay or carpet backing. At this stage: professional hot water extraction can flush the backing layer; professional deodourising treatments (ozone treatment or enzyme injection into the backing) are effective for persistent fermented amine odour. For a surface spill that was treated promptly, home treatment through two baking soda nights is successful in the majority of cases in Sutherland Shire conditions (non-humid, well-ventilated homes).
Why is the salt from bagoong a concern?
Bagoong alamang is heavily salted during fermentation — the salt content is typically 20–25% by weight of the bagoong, which acts as the preservative. The sodium chloride in the bagoong dissolves readily in the cold water rinse step and is largely removed by thorough cold water blotting in the first step. However, if the cold water rinse is inadequate (short dwell time or insufficient blotting), residual salt in the carpet fibres can attract moisture from the ambient air — the carpet will feel slightly damp and may attract dust more readily over the following weeks. The extended cold water blotting in the first step (60 seconds) is partly to remove the fermented shrimp paste and partly to flush the salt from the fibres.