{"id":566,"date":"2026-06-09T07:54:48","date_gmt":"2026-06-09T07:54:48","guid":{"rendered":"https:\/\/ktech4.k-tech-services.com\/toantam756\/?p=566"},"modified":"2026-06-24T00:47:24","modified_gmt":"2026-06-24T00:47:24","slug":"xu-ly-nito-trong-nuoc-thai-cong-nghiep-thach-thuc-va-giai-phap-cong-nghe-toi-uu","status":"publish","type":"post","link":"https:\/\/ktech4.k-tech-services.com\/toantam756\/xu-ly-nito-trong-nuoc-thai-cong-nghiep-thach-thuc-va-giai-phap-cong-nghe-toi-uu\/","title":{"rendered":"X\u1eec L\u00dd NIT\u01a0 TRONG N\u01af\u1edaC TH\u1ea2I C\u00d4NG NGHI\u1ec6P: GI\u1ea2I PH\u00c1P C\u00d4NG NGH\u1ec6 T\u1ed0I \u01afU"},"content":{"rendered":"

Trong c\u1ea5u tr\u00fac n\u01b0\u1edbc th\u1ea3i c\u1ee7a c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, gi\u1ebft m\u1ed5 gia s\u00fac, s\u1ea3n xu\u1ea5t h\u00f3a ch\u1ea5t, d\u1ec7t nhu\u1ed9m hay ph\u00e2n b\u00f3n, Nit\u01a1 (N)<\/strong> l\u00e0 m\u1ed9t trong nh\u1eefng th\u00e0nh ph\u1ea7n \u00f4 nhi\u1ec5m c\u1ee9ng \u0111\u1ea7u v\u00e0 kh\u00f3 x\u1eed l\u00fd nh\u1ea5t.<\/p>\n

N\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf tri\u1ec7t \u0111\u1ec3 tr\u01b0\u1edbc khi x\u1ea3 ra ngu\u1ed3n ti\u1ebfp nh\u1eadn, Nit\u01a1 s\u1ebd g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng ph\u00ec d\u01b0\u1ee1ng<\/strong> (eutrophication), l\u00e0m b\u00f9ng n\u1ed5 t\u1ea3o \u0111\u1ed9c, h\u00fat c\u1ea1n oxy trong n\u01b0\u1edbc v\u00e0 b\u1ee9c t\u1eed h\u1ec7 sinh th\u00e1i th\u1ee7y sinh. \u0110\u1ed1i v\u1edbi doanh nghi\u1ec7p, \u0111\u00e2y kh\u00f4ng ch\u1ec9 l\u00e0 b\u00e0i to\u00e1n v\u1ec1 b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng m\u00e0 c\u00f2n l\u00e0 r\u00e0o c\u1ea3n ph\u00e1p l\u00fd l\u1edbn v\u1edbi c\u00e1c ch\u1ebf t\u00e0i x\u1eed ph\u1ea1t ng\u00e0y c\u00e0ng nghi\u00eam kh\u1eafc.<\/p>\n

B\u00e0i vi\u1ebft n\u00e0y s\u1ebd cung c\u1ea5p c\u00e1i nh\u00ecn to\u00e0n di\u1ec7n v\u1ec1 c\u00e1c d\u1ea1ng t\u1ed3n t\u1ea1i c\u1ee7a Nit\u01a1 v\u00e0 c\u00e1c c\u00f4ng ngh\u1ec7 x\u1eed l\u00fd hi\u1ec7u qu\u1ea3 nh\u1ea5t hi\u1ec7n nay.<\/p>\n

1. C\u00e1c d\u1ea1ng t\u1ed3n t\u1ea1i c\u1ee7a nit\u01a1 trong n\u01b0\u1edbc th\u1ea3i c\u00f4ng nghi\u1ec7p<\/strong><\/span><\/h3>\n

\u0110\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t h\u1ec7 th\u1ed1ng x\u1eed l\u00fd chu\u1ea9n x\u00e1c, tr\u01b0\u1edbc h\u1ebft c\u1ea7n hi\u1ec3u r\u00f5 Nit\u01a1 trong n\u01b0\u1edbc th\u1ea3i t\u1ed3n t\u1ea1i d\u01b0\u1edbi nh\u1eefng d\u1ea1ng n\u00e0o. Th\u00f4ng th\u01b0\u1eddng, t\u1ed5ng Nit\u01a1 (TN – Total Nitrogen) \u0111\u01b0\u1ee3c chia th\u00e0nh:<\/p>\n

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    • Nit\u01a1 h\u1eefu c\u01a1:<\/strong> T\u1ed3n t\u1ea1i trong c\u00e1c h\u1ee3p ch\u1ea5t nh\u01b0 protein, amino axit, ur\u00ea (ph\u1ed5 bi\u1ebfn trong n\u01b0\u1edbc th\u1ea3i ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, ch\u0103n nu\u00f4i).<\/li>\n
    • Ammonia (NH4<\/sub>+ <\/sup>\/ NH3<\/sub>):<\/strong> D\u1ea1ng Nit\u01a1 h\u00f2a tan ph\u1ed5 bi\u1ebfn, ph\u00e1t sinh t\u1eeb qu\u00e1 tr\u00ecnh ph\u00e2n h\u1ee7y c\u00e1c h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 ho\u1eb7c t\u1eeb nguy\u00ean li\u1ec7u s\u1ea3n xu\u1ea5t h\u00f3a ch\u1ea5t.<\/li>\n
    • Nitrite (NO–<\/sup>2<\/sub>) v\u00e0 Nitrate (NO3<\/sub>–<\/sup>):<\/strong> C\u00e1c s\u1ea3n ph\u1ea9m c\u1ee7a qu\u00e1 tr\u00ecnh oxy h\u00f3a sinh h\u1ecdc, tan ho\u00e0n to\u00e0n trong n\u01b0\u1edbc.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

      2. C\u00e1c c\u00f4ng ngh\u1ec7 x\u1eed l\u00fd nit\u01a1 trong n\u01b0\u1edbc th\u1ea3i ph\u1ed5 bi\u1ebfn hi\u1ec7n nay<\/strong><\/span><\/h3>\n

      Hi\u1ec7n nay, c\u00f3 3 nh\u00f3m ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh \u0111\u1ec3 lo\u1ea1i b\u1ecf Nit\u01a1: Sinh h\u1ecdc<\/strong>, H\u00f3a l\u00fd<\/strong> v\u00e0 H\u00f3a h\u1ecdc<\/strong>. Trong \u0111\u00f3, ph\u01b0\u01a1ng ph\u00e1p sinh h\u1ecdc lu\u00f4n l\u00e0 x\u01b0\u01a1ng s\u1ed1ng c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng x\u1eed l\u00fd n\u01b0\u1edbc th\u1ea3i c\u00f4ng nghi\u1ec7p nh\u1edd t\u00ednh kinh t\u1ebf v\u00e0 hi\u1ec7u qu\u1ea3 l\u00e2u d\u00e0i.<\/p>\n

      1. Ph\u01b0\u01a1ng ph\u00e1p sinh h\u1ecdc: Quy tr\u00ecnh nitrat h\u00f3a v\u00e0 kh\u1eed nitrat<\/strong><\/p>\n

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        • \u0110\u00e2y l\u00e0 c\u00f4ng ngh\u1ec7 kinh \u0111i\u1ec3n nh\u01b0ng t\u1ed1i \u01b0u nh\u1ea5t, l\u1ee3i d\u1ee5ng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c ch\u1ee7ng vi khu\u1ea9n t\u1ef1 nhi\u00ean \u0111\u1ec3 bi\u1ebfn \u0111\u1ed5i Nit\u01a1 \u0111\u1ed9c h\u1ea1i th\u00e0nh kh\u00ed Nit\u01a1 (N2<\/sub>) tr\u01a1 bay l\u00ean kh\u00ed quy\u1ec3n.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

          Quy tr\u00ecnh di\u1ec5n ra qua 2 giai \u0111o\u1ea1n n\u1ed1i ti\u1ebfp t\u1ea1i 2 b\u1ec3 ch\u1ee9c n\u0103ng kh\u00e1c nhau:<\/p>\n

          Giai \u0111o\u1ea1n 1: Nitrat h\u00f3a (T\u1ea1i b\u1ec3 hi\u1ebfu kh\u00ed – Aerobic \/ Anoxic k\u1ebft h\u1ee3p)<\/strong><\/p>\n

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            • Trong m\u00f4i tr\u01b0\u1eddng gi\u00e0u oxy (DO > 2, mg\/L), vi khu\u1ea9n t\u1ef1 d\u01b0\u1ee1ng (Nitrosomonas<\/em> v\u00e0 Nitrobacter<\/em>) s\u1ebd oxy h\u00f3a Amoni th\u00e0nh Nitrite v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 Nitrate:<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

              Giai \u0111o\u1ea1n 2: Kh\u1eed Nitrat (T\u1ea1i b\u1ec3 thi\u1ebfu kh\u00ed – Anoxic)<\/strong><\/p>\n

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                • Trong m\u00f4i tr\u01b0\u1eddng thi\u1ebfu oxy (ch\u1ec9 s\u1ed1 DO < 0.5 mg\/L), c\u00e1c vi khu\u1ea9n d\u1ecb d\u01b0\u1ee1ng s\u1ebd s\u1eed d\u1ee5ng Nitrat l\u00e0m ch\u1ea5t nh\u1eadn electron \u0111\u1ec3 ph\u00e2n h\u1ee7y ch\u1ea5t h\u1eefu c\u01a1, gi\u1ea3i ph\u00f3ng kh\u00ed N2<\/sub>:<\/li>\n
                • L\u01b0u \u00fd k\u1ef9 thu\u1eadt:<\/strong> Qu\u00e1 tr\u00ecnh kh\u1eed Nitrat \u1edf b\u1ec3 Anoxic c\u1ea7n m\u1ed9t l\u01b0\u1ee3ng carbon h\u1eefu c\u01a1 (BOD) l\u00e0m ngu\u1ed3n th\u1ee9c \u0103n cho vi khu\u1ea9n. N\u1ebfu n\u01b0\u1edbc th\u1ea3i ngh\u00e8o carbon (nh\u01b0 n\u01b0\u1edbc th\u1ea3i sau s\u1ea3n xu\u1ea5t h\u00f3a ch\u1ea5t), k\u1ef9 s\u01b0 ph\u1ea3i ch\u00e2m th\u00eam c\u00e1c ngu\u1ed3n carbon ngo\u1ea1i sinh nh\u01b0 Methanol, Ethanol ho\u1eb7c r\u1ec9 m\u1eadt \u0111\u01b0\u1eddng.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

                  2. C\u00f4ng ngh\u1ec7 Anammox (Oxy h\u00f3a Amoni trong \u0111i\u1ec1u ki\u1ec7n k\u1ef5 kh\u00ed)<\/strong><\/p>\n

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                    • \u0110\u00e2y l\u00e0 m\u1ed9t b\u01b0\u1edbc ti\u1ebfn \u0111\u1ed9t ph\u00e1 trong c\u00f4ng ngh\u1ec7 sinh h\u1ecdc x\u1eed l\u00fd Nit\u01a1. Vi khu\u1ea9n Anammox c\u00f3 kh\u1ea3 n\u0103ng bi\u1ebfn \u0111\u1ed5i tr\u1ef1c ti\u1ebfp Amoni v\u00e0 Nitrite th\u00e0nh kh\u00ed N2<\/sub>ngay trong m\u00f4i tr\u01b0\u1eddng k\u1ef5 kh\u00ed m\u00e0 kh\u00f4ng c\u1ea7n ngu\u1ed3n carbon h\u1eefu c\u01a1.\n
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                      • \u01afu \u0111i\u1ec3m:<\/strong> Ti\u1ebft ki\u1ec7m \u0111\u1ebfn 60% chi ph\u00ed s\u1ee5c kh\u00ed oxy v\u00e0 100% chi ph\u00ed ch\u00e2m th\u00eam ngu\u1ed3n carbon. Ph\u00f9 h\u1ee3p cho n\u01b0\u1edbc th\u1ea3i c\u00f3 n\u1ed3ng \u0111\u1ed9 Nit\u01a1 c\u1ef1c cao v\u00e0 BOD th\u1ea5p.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

                        3. Ph\u01b0\u01a1ng ph\u00e1p h\u00f3a l\u00fd: th\u00e1p th\u1ed5i kh\u00ed stripping amoni<\/strong><\/p>\n

                        Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u00e1p d\u1ee5ng cho n\u01b0\u1edbc th\u1ea3i c\u00f3 n\u1ed3ng \u0111\u1ed9 Amoni c\u1ef1c cao (> 500 mg\/L) v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng ch\u1ecbu \u0111\u1ef1ng c\u1ee7a vi sinh v\u1eadt.<\/p>\n

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                        • Nguy\u00ean l\u00fd:<\/strong> N\u00e2ng pH c\u1ee7a n\u01b0\u1edbc th\u1ea3i l\u00ean m\u1ee9c > 10.5 b\u1eb1ng v\u00f4i ho\u1eb7c NaOH \u0111\u1ec3 chuy\u1ec3n to\u00e0n b\u1ed9 ion \u00a0th\u00e0nh kh\u00ed NH3<\/sub> h\u00f2a tan. Sau \u0111\u00f3, n\u01b0\u1edbc \u0111\u01b0\u1ee3c phun t\u1eeb tr\u00ean \u0111\u1ec9nh th\u00e1p stripping xu\u1ed1ng, lu\u1ed3ng kh\u00ed th\u1ed5i ng\u01b0\u1ee3c t\u1eeb d\u01b0\u1edbi l\u00ean s\u1ebd “cu\u1ed1n” kh\u00ed NH3<\/sub> ra kh\u1ecfi n\u01b0\u1edbc. Kh\u00ed NH3<\/sub> tho\u00e1t ra s\u1ebd \u0111\u01b0\u1ee3c h\u1ea5p th\u1ee5 b\u1eb1ng dung d\u1ecbch axit (nh\u01b0 H2<\/sub>SO4<\/sub>) \u0111\u1ec3 t\u1ea1o th\u00e0nh ph\u00e2n b\u00f3n amoni sunfat.<\/li>\n<\/ul>\n

                          4. Ph\u01b0\u01a1ng ph\u00e1p h\u00f3a h\u1ecdc: clo h\u00f3a \u0111\u1ebfn \u0111i\u1ec3m \u0111\u1ed9t bi\u1ebfn<\/strong><\/p>\n

                          S\u1eed d\u1ee5ng c\u00e1c ch\u1ea5t oxy h\u00f3a m\u1ea1nh nh\u01b0 Clo ho\u1eb7c Sodium Hypochlorite \u0111\u1ec3 oxy h\u00f3a th\u1eb3ng Amoni th\u00e0nh kh\u00ed N2<\/sub><\/p>\n

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                            • \u01afu \u0111i\u1ec3m:<\/strong> X\u1eed l\u00fd tri\u1ec7t \u0111\u1ec3 nhanh ch\u00f3ng, kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o th\u1eddi ti\u1ebft hay vi sinh.<\/li>\n
                            • Nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/strong> Chi ph\u00ed h\u00f3a ch\u1ea5t r\u1ea5t cao, d\u1ec5 sinh ra c\u00e1c ph\u1ee5 ph\u1ea9m clo h\u1eefu c\u01a1 g\u00e2y \u0111\u1ed9c h\u1ea1i cho m\u00f4i tr\u01b0\u1eddng, th\u01b0\u1eddng ch\u1ec9 \u00e1p d\u1ee5ng \u1edf giai \u0111o\u1ea1n tinh l\u1ecdc cu\u1ed1i c\u00f9ng v\u1edbi h\u00e0m l\u01b0\u1ee3ng Nit\u01a1 c\u00f2n l\u1ea1i r\u1ea5t nh\u1ecf.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

                              3. B\u1ea3ng so s\u00e1nh c\u00e1c c\u00f4ng ngh\u1ec7 x\u1eed l\u00fd nit\u01a1<\/strong><\/span><\/h3>\n\n\n\n\n\n\n\n\n
                              Ti\u00eau ch\u00ed<\/strong><\/td>\nSinh h\u1ecdc (Anoxic\/Aerobic)<\/strong><\/td>\nC\u00f4ng ngh\u1ec7 Anammox<\/strong><\/td>\nTh\u00e1p Stripping Amoni<\/strong><\/td>\nClo h\u00f3a \u0111\u1ed9t bi\u1ebfn<\/strong><\/td>\n<\/tr>\n<\/thead>\n
                              N\u1ed3ng \u0111\u1ed9 x\u1eed l\u00fd<\/strong><\/td>\nTh\u1ea5p \u0111\u1ebfn Trung b\u00ecnh<\/td>\nCao (>300 , mg\/L)<\/td>\nR\u1ea5t cao (>500mg\/L)<\/td>\nTh\u1ea5p (\u0110\u00e1nh b\u00f3ng n\u01b0\u1edbc th\u1ea3i)<\/td>\n<\/tr>\n
                              Chi ph\u00ed \u0111\u1ea7u t\u01b0<\/strong><\/td>\nTrung b\u00ecnh<\/td>\nCao (Nu\u00f4i c\u1ea5y vi sinh kh\u00f3)<\/td>\nCao (X\u00e2y d\u1ef1ng th\u00e1p)<\/td>\nTh\u1ea5p<\/td>\n<\/tr>\n
                              Chi ph\u00ed v\u1eadn h\u00e0nh<\/strong><\/td>\nTh\u1ea5p – Trung b\u00ecnh<\/td>\nR\u1ea5t th\u1ea5p<\/td>\nCao (T\u1ed1n h\u00f3a ch\u1ea5t pH)<\/td>\nR\u1ea5t cao (T\u1ed1n Clo)<\/td>\n<\/tr>\n
                              Y\u00eau c\u1ea7u b\u1ed5 sung Carbon<\/strong><\/td>\nC\u00f3 (N\u1ebfu thi\u1ebfu BOD)<\/td>\nKh\u00f4ng c\u1ea7n<\/td>\nKh\u00f4ng c\u1ea7n<\/td>\nKh\u00f4ng c\u1ea7n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                              4. Nh\u1eefng l\u01b0u \u00fd quan tr\u1ecdng khi v\u1eadn h\u00e0nh h\u1ec7 th\u1ed1ng x\u1eed l\u00fd nit\u01a1<\/strong><\/span><\/h3>\n

                              \u0110\u1ec3 h\u1ec7 th\u1ed1ng x\u1eed l\u00fd Nit\u01a1 (\u0111\u1eb7c bi\u1ec7t l\u00e0 h\u1ec7 th\u1ed1ng sinh h\u1ecdc) v\u1eadn h\u00e0nh \u1ed5n \u0111\u1ecbnh, doanh nghi\u1ec7p c\u1ea7n ki\u1ec3m so\u00e1t nghi\u00eam ng\u1eb7t c\u00e1c ch\u1ec9 s\u1ed1 sau:<\/p>\n

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                                1. T\u1ef7 l\u1ec7 dinh d\u01b0\u1ee1ng (BOD:N:P):<\/strong> \u0110\u1ed1i v\u1edbi b\u1ec3 hi\u1ebfu kh\u00ed, t\u1ef7 l\u1ec7 l\u00fd t\u01b0\u1edfng l\u00e0 100:5:1<\/strong>. \u0110\u1ed1i v\u1edbi b\u1ec3 thi\u1ebfu kh\u00ed (kh\u1eed nitrat), t\u1ef7 l\u1ec7 BOD:N<\/strong> t\u1ed1i thi\u1ec3u ph\u1ea3i \u0111\u1ea1t 4:1<\/strong>.<\/li>\n
                                2. \u0110\u1ed9 ki\u1ec1m (Alkalinity):<\/strong> Qu\u00e1 tr\u00ecnh Nitrat h\u00f3a ti\u00eau t\u1ed1n r\u1ea5t nhi\u1ec1u \u0111\u1ed9 ki\u1ec1m ($7.14 , mg$ \u0111\u1ed9 ki\u1ec1m CaCO3 cho m\u1ed7i $1 , mg$ $NH_4^+$ b\u1ecb oxy h\u00f3a). N\u1ebfu \u0111\u1ed9 ki\u1ec1m t\u1ee5t s\u00e2u, pH s\u1ebd gi\u1ea3m v\u00e0 l\u00e0m ch\u1ebft vi khu\u1ea9n nitrat h\u00f3a. C\u1ea7n ch\u00e2m th\u00eam Soda ($Na_2CO_3$) ho\u1eb7c v\u00f4i \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 ki\u1ec1m $> 150 , mg\/L$.<\/li>\n
                                3. Nhi\u1ec7t \u0111\u1ed9 v\u00e0 pH:<\/strong> Vi khu\u1ea9n nitrat h\u00f3a r\u1ea5t nh\u1ea1y c\u1ea3m. pH t\u1ed1i \u01b0u l\u00e0 5 – 8.5<\/strong> v\u00e0 nhi\u1ec7t \u0111\u1ed9 l\u00fd t\u01b0\u1edfng l\u00e0 25\u00b0C – 35\u00b0C<\/strong>.<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n

                                  L\u1eddi k\u1ebft<\/strong><\/span><\/h3>\n

                                  X\u1eed l\u00fd Nit\u01a1 trong n\u01b0\u1edbc th\u1ea3i c\u00f4ng nghi\u1ec7p ch\u01b0a bao gi\u1edd l\u00e0 m\u1ed9t nhi\u1ec7m v\u1ee5 d\u1ec5 d\u00e0ng, \u0111\u00f2i h\u1ecfi s\u1ef1 k\u1ebft h\u1ee3p ch\u00ednh x\u00e1c gi\u1eefa c\u00f4ng ngh\u1ec7, thi\u1ebft k\u1ebf k\u1ef9 thu\u1eadt v\u00e0 k\u1ef9 n\u0103ng v\u1eadn h\u00e0nh. Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u00fang c\u00f4ng ngh\u1ec7 ngay t\u1eeb \u0111\u1ea7u kh\u00f4ng ch\u1ec9 gi\u00fap doanh nghi\u1ec7p an t\u00e2m tr\u01b0\u1edbc c\u00e1c \u0111\u1ee3t thanh tra m\u00f4i tr\u01b0\u1eddng m\u00e0 c\u00f2n t\u1ed1i \u01b0u h\u00f3a chi ph\u00ed v\u1eadn h\u00e0nh, h\u01b0\u1edbng t\u1edbi m\u1ed9t quy tr\u00ecnh s\u1ea3n xu\u1ea5t “Xanh” tr\u01b0\u1eddng t\u1ed3n.<\/p>\n

                                  \n

                                  H\u1ec7 th\u1ed1ng x\u1eed l\u00fd n\u01b0\u1edbc th\u1ea3i c\u1ee7a b\u1ea1n \u0111ang g\u1eb7p v\u1ea5n \u0111\u1ec1 v\u1ec1 ch\u1ec9 ti\u00eau Nit\u01a1 v\u01b0\u1ee3t chu\u1ea9n? H\u00e3y \u0111\u1ec3 l\u1ea1i th\u00f4ng tin ho\u1eb7c li\u00ean h\u1ec7 v\u1edbi \u0111\u1ed9i ng\u0169 chuy\u00ean gia c\u1ee7a ch\u00fang t\u00f4i \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n gi\u1ea3i ph\u00e1p v\u00e0 kh\u1ea3o s\u00e1t mi\u1ec5n ph\u00ed!<\/em><\/p>\n<\/blockquote>\n

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                                      Trong c\u1ea5u tr\u00fac n\u01b0\u1edbc th\u1ea3i c\u1ee7a c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, gi\u1ebft m\u1ed5 gia s\u00fac, s\u1ea3n xu\u1ea5t h\u00f3a ch\u1ea5t, d\u1ec7t nhu\u1ed9m hay ph\u00e2n b\u00f3n, Nit\u01a1 (N) l\u00e0 m\u1ed9t trong nh\u1eefng th\u00e0nh ph\u1ea7n \u00f4 nhi\u1ec5m c\u1ee9ng \u0111\u1ea7u v\u00e0 kh\u00f3 x\u1eed l\u00fd nh\u1ea5t. N\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf tri\u1ec7t \u0111\u1ec3 tr\u01b0\u1edbc khi x\u1ea3…<\/p>\n","protected":false},"author":1,"featured_media":869,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-566","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/ktech4.k-tech-services.com\/toantam756\/wp-json\/wp\/v2\/posts\/566","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ktech4.k-tech-services.com\/toantam756\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ktech4.k-tech-services.com\/toantam756\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ktech4.k-tech-services.com\/toantam756\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ktech4.k-tech-services.com\/toantam756\/wp-json\/wp\/v2\/comments?post=566"}],"version-history":[{"count":5,"href":"https:\/\/ktech4.k-tech-services.com\/toantam756\/wp-json\/wp\/v2\/posts\/566\/revisions"}],"predecessor-version":[{"id":940,"href":"https:\/\/ktech4.k-tech-services.com\/toantam756\/wp-json\/wp\/v2\/posts\/566\/revisions\/940"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ktech4.k-tech-services.com\/toantam756\/wp-json\/wp\/v2\/media\/869"}],"wp:attachment":[{"href":"https:\/\/ktech4.k-tech-services.com\/toantam756\/wp-json\/wp\/v2\/media?parent=566"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ktech4.k-tech-services.com\/toantam756\/wp-json\/wp\/v2\/categories?post=566"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ktech4.k-tech-services.com\/toantam756\/wp-json\/wp\/v2\/tags?post=566"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}