Combined treatment system for waste sodium dichromate and emulsified liquid

• Main Authors: XU YE, LIU WEN, ZHENG YANQING, ZHANG JIAFU, ZHOU WEI, ZOU LINHU, XU JING, XIAO WEI, ZHONG RUNZHI, SHU ZHENGHUA, WU TAO, HUANG ZHIQUAN, ZHANG ZHEN, REN QIANG, WAN QIAN
• Format: Patent
• Language: Chinese; English
• Published: 19.11.2019
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The utility model discloses a combined treatment system for waste sodium dichromate and emulsified liquid. The method comprises the following steps: by utilizing the oxidability of sodium dichromate and the reducibility of organic matters in emulsion in a physicochemical workshop, mixing the emulsion with the sodium dichromate, so that the mixed solution is subjected to oxidation-reduction reaction, high-valence chromium ions in the sodium dichromate are reduced into low-valence chromium ions with lower toxicity, and meanwhile, the organic matters in the emulsion are removed; mixed liquid obtained after reaction is subjected to direct filter pressing dehydration, separated solid substances are subjected to solidification treatment, and filtered water enters a sewage station to be subjectedto unified treatment after reaching the standard through detection. In this way, waste is treated with waste, hexavalent chromium in sodium dichromate is reduced into trivalent chromium with low toxicity, organic matter in e