The 2026 Phenol Discharge Limit in Indonesia Under PP 22/2021
Under Indonesia's PP No. 22 Tahun 2021 (in force through 2026), the phenol discharge limit is 0.5 mg/L for water Classes I and II and 1.0 mg/L for Classes III and IV. Industrial sectors such as oil & gas, palm oil (P.10/2024), and textile effluents must typically meet ≤0.5 mg/L at the final compliance point, verified by APHA 5530 D or SNI 06-6989.25-2005.
PP No. 22 Tahun 2021 was signed on 19 February 2021, revoked PP 82/2001 on the same date, and remains the controlling regulation for hazardous-waste and industrial-effluent parameters through 2026 with no amendment issued as of Q1 2026. Table 1 of Lampiran (Attachment) sets the maximum allowable concentration of total phenolic compounds (as phenol index) at the outlet monitoring point, not at the inlet of the receiving water body. The unit is mg/L — not µg/L as in some older effluent tables — and grab samples are explicitly accepted when 24-hour composite sampling is impractical, provided the sample is taken during the highest-loading shift.
| Receiving Water Class | Phenol Limit (mg/L) | Designated Use |
|---|---|---|
| Class I | 0.5 | Drinking water source, aquatic biodiversity conservation |
| Class II | 0.5 | Water recreation, fish farming, irrigation of crops eaten raw |
| Class III | 1.0 | Irrigation, livestock watering, aquaculture |
| Class IV | 1.0 | Spray irrigation, urban landscaping, industrial cooling |
Facilities discharging to a Class I or II river — the most common scenario in Java and Sumatra — must design to 0.5 mg/L, not 1.0 mg/L. PP 22/2021 also tightened the sample-handling language versus PP 82/2001: phenol must now be reported alongside temperature, pH, and flow at the moment of sampling, and a chain-of-custody form (Berita Acara Pengambilan Contoh) is mandatory for any third-party lab result submitted to KLHK.
Sector-Specific Overlays You Must Also Check
PP 22/2021 is the floor, not the ceiling — sector decrees issued by KLHK and line ministries frequently set tighter limits or move the compliance point upstream. A facility meeting 0.5 mg/L at the IPAL outlet may still fail if the sector decree requires compliance at the receiving-water edge of the mixing zone.
| Sector | Regulating Decree | Phenol Limit (mg/L) | Compliance Point |
|---|---|---|---|
| Oil & gas upstream / FGD | KLHK reference + ESDM guidance | 0.5 | Produced-water re-injection skids or sea-outfall monitoring |
| Pulp & paper | P.15/2019 | <0.5 | Final outlet to Class II receiver |
| Palm oil (mill & refinery) | P.10/2024 | <0.5 | Final discharge to river |
| Textile | Kepmen LH 06/2007 (still enforced) | <0.5 | After on-site treatment, before river |
| Pharmaceutical & resin | PP 22/2021 + PROPER rating | 0.5 | Outlet; long-term average often held below 0.3 mg/L for green PROPER |
Oil and gas operators producing FGD wastewater or refinery spent-caustic streams should note that the KLHK reference document requires seawater-compatibility testing (salinity, temperature, dissolved oxygen) before sea discharge, but the phenol number does not relax — it stays at 0.5 mg/L. Pulp and paper mills under P.15/2019 are bound to a stricter 0.5 mg/L even when their receiving water is officially Class II, because the decree explicitly tightens the parameter list. P.10/2024 for palm oil mill effluent (POME) sets phenol below 0.5 mg/L for final discharge — tighter than the PP 22/2021 Class III default of 1.0 mg/L — because palm oil condensates contain measurable cresols and guaiacols from sterilization and empty-fruit-bunch liquor. Pharmaceutical and phenolic-resin manufacturers commonly hold long-term averages below 0.3 mg/L to maintain a green PROPER rating, which protects them from public disclosure penalties tied to UU 32/2009 environmental management law.
Influent Phenol Concentrations by Industry and Why They Matter
Influent concentration — not the regulatory number — is what determines which treatment train is economically and technically feasible. A petrochemical plant at 200 mg/L phenol has radically different equipment requirements from a coking plant at 4,000 mg/L, even though both face the same 0.5 mg/L outlet limit.
| Industry | Typical Influent Phenol (mg/L) | Peak / Shock (mg/L) | Co-contaminants of Note |
|---|---|---|---|
| Petrochemical (refinery, condensate, spent caustic) | 50–500 | 1,000 (slop handling) | Sulfide, oil, heavy metals |
| Coking and coal-tar processing | 1,000–6,000 | 8,000+ | Thiocyanate, free cyanide, ammonia 200–800 mg/L |
| Phenolic resin manufacturing | 1,000–10,000 | 15,000 (batch discharge) | Formaldehyde, methanol |
| Pharmaceutical & pesticide | 100–2,000 | 3,000 (campaign changeover) | Active ingredients, solvents, high BOD/COD |
| Textile | 5–50 | 100 (dye-bath dump) | Azo dyes, high salinity, color >1,000 Pt-Co |
Coking and resin streams sit at the top of the concentration range and demand a high-temperature destruction step before any biological polishing will survive. Petrochemical and pharmaceutical effluents sit in the middle band where biological degradation followed by Fenton or activated carbon is the standard 2026 design. Textile streams are low in phenol concentration but high in flow and carry azo dyes that compete with phenol for oxidant, so a different design rule applies — long-HRT biological followed by decolorization is more critical than phenol-specific polishing.
Choosing a Treatment Train to Reach 0.5 mg/L
Match the train to the influent band. Anything above 100 mg/L needs a destruction step upstream of biology; below 100 mg/L, a well-run activated-sludge or MBR system can often meet the limit on its own. The decision rule below is the one most engineers on a 2026 bid-spec review will end up applying.
| Raw Phenol (mg/L) | Recommended Train | Expected Outlet (mg/L) | Notes |
|---|---|---|---|
| <100 | Equalization → DAF → MBR | 0.2–0.5 | Biology alone may suffice if biomass acclimated >30 d |
| 100–1,000 | Equalization → DAF → MBR → Fenton or GAC | 0.05–0.3 | Polishing step is mandatory for Class I/II compliance |
| 1,000–5,000 | Equalization → WAO → equalization → MBR → GAC | <0.1 | WAO at 200 °C / 7 MPa cuts load 90–99% before biology |
| >5,000 | SCWO or WAO → MBR → GAC → final pH trim | <0.05 | Consider spent-caustic segregation and resin recovery upstream |
Biological treatment alone — submerged MBR with PVDF flat-sheet membranes operated at F/M 0.05–0.15 d⁻¹, HRT 18–36 h, pH 6.5–7.5, and DO 2–4 mg/L — typically takes a 200 mg/L feed to 1–5 mg/L effluent; not enough for the 0.5 mg/L limit. Adding a Fenton oxidation step (Fe²⁺ 50–200 mg/L, H₂O₂ 200–1,000 mg/L, pH 3 for 60–120 min) after biology removes 95–99% of residual phenol, dropping the outlet to 0.05–0.5 mg/L. Granular activated carbon (GAC) polishing is the alternative for facilities that want a non-chemical polish; capacity is 400–600 mg phenol per kg carbon until breakthrough, and a single 3-meter carbon vessel can hold 8–10 metric tons. For high-strength coking or resin streams above 5,000 mg/L, wet air oxidation (WAO) at 200 °C and 7 MPa removes 90–99% of COD and phenol in a single pressurized reactor before biology — this is the standard 2026 design for new coking-wastewater plants in Shanxi-style coal-chemical complexes adapted for Indonesian conditions. For deeper context on biological nutrient removal side-by-side, see our ammonia nitrogen removal options for industrial wastewater.
Process Parameters and Equipment Selection
The numbers below go straight into a P&ID or bid specification. They reflect typical 2026 design for an Indonesian petrochemical or phenolic-resin plant treating 500–2,000 m³/d of phenol-laden wastewater to meet 0.5 mg/L at the compliance point.
| Unit Operation | Key Parameter | Design Range | Selection Note |
|---|---|---|---|
| Equalization tank | HRT | 8–12 h | Buffers batch shocks from resin or coking; mix with 5–8 W/m³ |
| Oil removal (primary) | Free oil content | 10–30% in feed | DAF removes >95% emulsified oil; protects MBR from fouling |
| Bioreactor (MBR) | Flux / MLSS | 12–18 L/m²·h, 8,000–12,000 mg/L | DF-series flat sheet; replaces secondary clarifier |
| Fenton reactor | pH / Fe²⁺ / H₂O₂ | 3.0 / 50–200 / 200–1,000 mg/L | PLC-controlled acid + Fe + H₂O₂ dosing, neutralization to pH 7–8 after |
| GAC polishers | EBCT / capacity | 10–30 min / 400–600 mg/kg | Coconut-shell carbon, 8×30 mesh, two vessels in lead-lag |
| Final pH trim | Outlet pH | 6.0–9.0 (PP 22/2021) | NaOH dosing; online pH meter tied to compliance point |
An MBR membrane bioreactor replaces the secondary clarifier and gives a stable MLSS of 8,000–12,000 mg/L, which buffers phenol shock loads that would wash out a conventional activated-sludge system. Upstream of the bioreactor, a DAF unit for oil and suspended-solids removal upstream of the bioreactor cuts the free-oil load that would otherwise coat the membranes. The Fenton step is best run as a sidestream on the MBR permeate, not on the mixed liquor, to avoid iron fouling of the membranes — a PLC-controlled Fenton reagent dosing system with automatic pH swing from 3 to 7.5 is the standard 2026 build. For a complete packaged train, the MBR membrane bioreactor for phenol-laden streams integrates equalization, biology, and membrane separation in a single skid, which shortens the on-site build for a 500 m³/d greenfield plant to 4–6 months.
Monitoring, Sampling, and the 2026 Enforcement Picture
Compliance is demonstrated on paper, not in the field. PP 22/2021 specifies minimum monthly self-reporting; KLHK's 2025 NLCP (National Leakage Control Program) now layers online analyzers on top of grab-sample reporting for any IPAL discharging more than 50 m³/d, and 2026 is the first full year of enforcement.
Sampling protocol: a 24-hour composite using an auto-sampler is the default; grab samples are accepted during the highest-loading shift if the auto-sampler is offline. Analytical method is 4-aminoantipyrine colorimetry (APHA 5530 D) for total phenolic index, and HPLC per SNI 06-6989.25-2005 for individual species — phenol, 2,4-dimethylphenol, p-cresol, and the other 11 priority phenols listed in the SNI annex. The lab must hold KAN (Komite Akreditasi Nasional) accreditation; verify the LP-1xx-ID number on the certificate is current and covers matrix code SW (solid waste) or WW (wastewater).
The 2025 NLCP rollout requires online COD and phenol analyzers at the IPAL outlet for facilities above 50 m³/d, with data pushed to KLHK's SIMPEL platform every 15 minutes. Facilities that already invested in online COD analyzers for self-reporting under NLCP report a 30–40% drop in manual-lab costs and faster incident response. Online ammonia-N meters are now part of the same enforcement wave for facilities with ammonia loads above 50 mg/L — see our online ammonia analyzer buyer guide for spec details. Penalties for exceedance run from administrative sanctions and mandatory remediation through PROPER green-rating revocation to potential criminal liability under UU 32/2009 for repeat or willful violations, with fines up to IDR 10 billion and up to 10 years' imprisonment in the most serious cases. For regional context, our neighboring-country pH and discharge limit guide for Malaysian compliance teams covers the parallel DOE framework.
Frequently Asked Questions
What is the current phenol discharge limit in Indonesia for 2026?
0.5 mg/L for water Classes I and II and 1.0 mg/L for Classes III and IV, per PP No. 22 Tahun 2021 Table 1 (Lampiran), measured as maximum allowable concentration at the IPAL outlet.
Does PP 22/2021 replace PP 82/2001?
Yes. PP 22/2021 was signed 19 February 2021, revoked PP 82/2001 on the same date, and is the controlling regulation for industrial effluent quality through 2026 with no amendment in force as of Q1 2026.
What analytical method is required for phenol compliance reporting?
4-aminoantipyrine colorimetry per APHA 5530 D for total phenolic index, and HPLC per SNI 06-6989.25-2005 for individual phenol species, performed by a KAN-accredited lab (LP-1xx-ID certificate).
Is the 0.5 mg/L phenol limit measured at the IPAL outlet or in the receiving river?
PP 22/2021 measures at the IPAL outlet (titik penaatan). Sector decrees such as P.10/2024 for palm oil and P.15/2019 for pulp and paper may require compliance at the receiving-water edge of the mixing zone, which is a stricter requirement.
What is the NLCP online-analyzer requirement for phenol?
KLHK's 2025 NLCP requires online COD and phenol analyzers at the IPAL outlet for facilities above 50 m³/d, with 15-minute data push to the SIMPEL platform, enforced throughout 2026.
