Dechlorination — Process Challenge

탈염소 처리(잔류염소 제거)

폐수 방류 전 NPDES 기준 충족 및 염소에 민감한 RO/나노여과막 도달 전, 시설은 잔류 자유염소와 결합염소를 중화해야 합니다. 바이어는 계량 시스템을 통해 아황산염계 환원제를 대량 투입하며, 메타중아황산나트륨(소듐 메타바이설파이트)은 대량 반복 구매되는 상품입니다
Updated Jun 2026
솔루션 접근법

RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.

Typical Treatment Workflow
1
Water & System Assessment
Characterize the water and the system — hardness, alkalinity, pH, TDS/conductivity, microbial load, and the metallurgy and temperatures of the equipment being protected.
2
Program & Chemistry Selection
Match coagulants, flocculants, scale and corrosion inhibitors, biocides, or pH adjusters to the water profile and discharge limits, factoring compatibility with any existing program.
3
Jar Testing & Dosing
Confirm coagulant and flocculant dose and feed point by jar test, set inhibitor and biocide treat rates, and size packaging (drums, totes, bulk) to consumption.
4
Monitoring & Control
Track residuals, turbidity, ORP, corrosion coupons, and effluent compliance, adjusting chemistry and dose as feedwater and load change.
Recommended Chemistries (6)
Sodium Bisulfite
CAS 7631-90-5
특수 첨가제
Liquid sulfite scavenger
3260 (SODIUM BISULFITE) · Class
In catalog. Bisulfite reduces free chlorine/hypochlorite to chloride and is oxidized to sulfate, removing chlorine residual in seconds
융점:Decomposes   끓는점:Decomposes   밀도:1.48 at 20 °C
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Potassium Metabisulfite (Technical/Food Grade)
CAS 16731-55-8
특수 첨가제
보존
1759 (POTASSIUM METABISULFITE) · Class
In catalog. Dissolves to release bisulfite, the active reductant for chlorine removal; dry form is convenient for makedown
융점:Decomposes at approximately 150 °C   밀도:2.3 g/cu cm   Solubility: Freely soluble in water; insoluble in alcohol
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Sodium thiosulfate
CAS 7772-98-7
산 및 염
보존
In catalog. Mild reductant that quenches chlorine and chloramine, favored where over-reduction of dissolved oxygen must be avoided
융점:48.5 °C   밀도:1.667   Solubility: PRACTICALLY INSOL IN ALCOHOL
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Ammonium Bisulfite, 60%
CAS 10192-30-0
산 및 염
Ammonium-based scavenger
2693 (AMMONIUM BISULFITE, SOLID) · Class
In catalog. Liquid bisulfite source for high-volume dechlorination and oxygen-scavenging dosing skids
융점:-10 °C   끓는점:Sublimates at 150 °C   밀도:2.03 at 20 °C 1.40 (72% aqueous solution)
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Sodium metabisulfite
CAS 7681-57-4
특수 첨가제
보존
1759 (SODIUM METABISULFITE) · Class
Sourced on demand. The most-searched dechlorination active; in water it forms bisulfite that reduces chlorine to chloride
융점:> 150 °C (Decomposes)   끓는점:Decomposes   밀도:1.4
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Ascorbic Acid (Vitamin C), Food Grade
CAS 50-81-7
산 및 염
보존
Sourcing option. Reductant used where sulfite residual or pH depression must be avoided, e.g. sensitive receiving-water dechlorination
융점:190–192 °C (decomposes)   밀도:1.65   Solubility: ≥ 100 mg/mL at 23 °C
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