SU1330079A1 - Method of purifying effluents from zinc ions - Google Patents

Abstract

The invention relates to methods for cleaning SEPTABLE. Water from ions QI) 1Ka and NO. It permits to reduce the duration of the process and the volume of sediment when stored in a high degree of purification. Waste water containing 743. Mg / l ZnSO, 1020 mg / l HjSO and 2700 mg / l NajSO is treated with a solution of ammophos to achieve a ratio of Zn and sol 1: (2.4-3.6), and then. sodium carbonate, about pH 5-6. At the same time, the time of sedimentation of sediment is significantly reduced, its volume at 99.72-99.98% of the degree of purification of wastewater from zinc ions. 1 hp f-ly. 1 tab. 00 with QD

Description

The invention relates to methods for treating wastewater from zinc ions and can be used in the chemical, metallurgical and engineering industries.

The purpose of the invention is to reduce the duration of the process and reduce the volume of sediment while maintaining a high degree of purification.

Example. Wastewater containing 743 mg / l ZnSO; 1020 mg / l N SO and 2700 mg / l Naj.SO, treated with various amounts of a 12% aqueous solution of ammophos, corresponding to the ratio

5.0 6.0 5.5 4.9 6.1 5.0 6.0

Famous

1: 0.5-1.4

As follows from the data presented, the subsequent upholding and separation

sequential administration of ammophos and car-sediment, characterized in that, in order to

sodium bonate reduces the continuation of the process

purification process and reduce and reduce the volume of sediment while maintaining the volume of the resulting precipitate while maintaining a high degree of purification, as

phosphorus-containing reagent is used ammophos, which is introduced into the wastewater before treatment with sodium carbonate.

Research Institute of high purity.

Claims (2)

1. The method of purification of waste water from zinc ions, including the treatment with sodium carbonate and phosphorus-containing reagent with 50 2. The method according to p. different in that. that ammophos is introduced in a ratio of PO 1: (2.5-3.5), and sodium carbonate until a pH of 5-6 is reached. Editor M. Nedo.luchenko Order 3533/23 Make up. L. Zanaveskin Tehred I. VeresKorrektor L. Patay Circulation 850 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 1 13035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4 1: (2.4-3.6), and then with 10% sodium carbonate solution until a pH of 4.9-6.1 is reached. After stirring, the precipitation time, the volume of sediment and the degree of wastewater purification from zinc ions are determined. For comparison, the wastewater of this composition was treated with sodium carbonate solution to a pH of 7 and phosphoric acid until a ratio of 1: (0.5-14). After mixing, the precipitation time, the volume of sediment and the degree of sewage purification from zinc ions were determined. The results of the experiments are given in the table. 18-22 12-30 99.96-99.98 50 2. The method according to p. different in that. that ammophos is introduced in a ratio of PO 1: (2.5-3.5), and sodium carbonate until a pH of 5-6 is reached.