GB/T 29999-2026Integrated treatment specification for acidic wastewater from copper mines (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part

1.Structure and Drafting Rules of Standardization Documents". Drafting. This document replaces GB/T 29999-2013 "Integrated Treatment Standard for Acidic Wastewater from Copper Mines". Compared with GB/T 29999-2013, except for... Aside from structural adjustments and editorial changes, the main technical changes are as follows:

a) The scope has been changed to include the collection, transportation, and storage of acidic water in copper mines (see Chapter 1, Chapter 1 of the.2013 edition);

b) The requirement of "simultaneous mining and restoration" has been added for open-pit mines and spoil heaps (see 4.1.3);

c) Increased requirements for the collection and transportation of acidic wastewater (see 4.2.1);

d) Increased requirements for seepage prevention in wastewater storage facilities during the wastewater treatment process (see 4.2.1);

e) The surface seepage prevention requirements for acidic reservoirs have been revised (see 4.2.2~4.2.4,

4.6 in the.2013 edition);

f) Increased vertical seepage prevention requirements for acidic reservoirs (see 4.2.5);

g) The requirements for the disposal of neutralized sludge have been changed (see 4.3.3,

4.8 of the.2013 edition);

h) The requirements for selecting the main wastewater treatment process have been changed (see Table 1, Table 1 in the.2013 edition);

i) Added process selection options for characteristic pollutants (see 5.3);

j) The relevant requirements for wastewater reuse and recycled water quality have been revised (see 6.2~6.5,

5 Selection of acidic wastewater treatment process

5.1 Based on the characteristics of acidic wastewater, a wastewater treatment process capable of stably treating it to meet discharge standards and facilitating reuse should be selected. Acidic wastewater... The main water treatment processes are shown in Table 1.

5.2 For the treatment of acidic wastewater, priority should be given to treatment processes that recover valuable metals or utilize them comprehensively.

5.3 In areas with special emission requirements for characteristic pollutants such as thallium and manganese, it is advisable to add advanced oxidation and nano-adsorption processes to the conventional treatment process. Pre-processing or deep processing devices.

6 Wastewater reuse

6.1 Acidic wastewater should be reused after treatment; wastewater that cannot be recycled should be discharged in compliance with standards.

6.2 When reusing effluent from lime neutralization and high-concentration slurry methods, it is advisable to periodically employ measures such as chemical scale inhibition, ion exchange, and biological scale inhibition to mitigate the effects of lime scale. Scaling and corrosion of pipelines and equipment during transportation and use.

6.3 When recycled water is used for spoil heaps, road dust suppression and wet dust collection, it shall comply with the provisions of GB 50988.

6.4 When recycled water is used as boiler feedwater, it should be further treated with softening, desalination, and ion exchange according to the boiler operating conditions until it reaches the required level. The boiler water quality must meet the standards for the corresponding operating conditions. For low-pressure boilers, the water quality should meet the standards for boiler feedwater in Table 5 of GB/T 1576-2018. Quality requirements. For medium-pressure boilers, the water quality should meet the boiler feedwater quality requirements in Table 2 of GB/T 12145-2016; for hot water boilers... For grid-connected and thermal extraction boilers, the water quality should meet the relevant industry standards.

6.5 When recycled water is used as process water, it shall meet the water quality requirements of GB/T 19923 or the relevant process and product water quality standards.

6.6 Users of recycled water should manage the use of recycled water, including monitoring water quality stability, water quality and quantity, and the transmission network and water-using equipment. Control and other related tasks.

6.7 Reclaimed water pipes shall be painted with a color that distinguishes them from fresh water pipes, and shall be marked with the words "Reclaimed Water". 6.8 "No Drinking" signs should be posted at the water points of the recycled water pipeline to prevent accidental drinking or misuse.

7 Monitoring and Emissions

7.1 The effluent sampling and monitoring point should be located at the outlet of the wastewater treatment facility, and a monitoring plan should be formulated to regularly sample the effluent in accordance with the requirements of HJ819. The quality was sampled, monitored, and analyzed.

7.2 The discharge outlet for wastewater shall be equipped with metering and online monitoring devices and comply with the provisions of HJ353, HJ355 and HJ212.

7.3 Wastewater discharge shall meet the requirements of GB 25467.In areas with special discharge requirements for characteristic pollutants, local discharge standards shall also be met. Standard requirements.

7.4 The methods for monitoring and analyzing pollutants in discharged wastewater shall comply with the provisions of GB 25467.