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Photovoltaic wastewater

Photovoltaic wastewater

  1. Project Overview

  A solar energy Chengdu base is located in the first phase of a 1GW high-efficiency crystalline silicon battery production line project, which was officially launched on November 18, 2015, and was completed and put into production on June 30, 2016.

 

  The second-phase 2GW high-efficiency crystalline silicon battery production line project was started on February 18, 2017, and was completed and put into production on September 20, 2017.

 

  The Phase III 3.2GW high-efficiency crystalline silicon solar cell project, with a total investment of 2.023 billion yuan, was launched at the end of 2017 and was completed and put into production on November 18, 2018.

 

  While developing rapidly, the company attaches great importance to environmental protection and has its own sewage treatment plant. The process is as follows:

 

    2.the purpose of using Mianjin environmental protection products

  By using the Making Green Environmental Protection Micro Boost® series of nitrifying bacteria and total nitrogen removal bacteria, the ammonia nitrogen and total nitrogen in the effluent can be reduced to meet the emission requirements.

 

  3. the debugging process

  The biochemical process is composed of two-stage AO. The return sludge from the secondary settling tank is mixed with the physicochemical effluent and enters the biochemical system. The commissioning work was carried out in October 2018. The commissioning period is 10 days.

  The data during commissioning is as follows:

  4. Summary

  1) Making Green Environmental Protection Micro Boost® series nitrifying bacteria and total nitrogen removal bacteria are more suitable for the treatment of nitrogen in the sewage treatment of the photovoltaic industry;

  2) Due to the addition of lime and mixed acid neutralization in the physicochemical treatment, the consumption of acidity and calcium ions for alkalinity is relatively high. It is necessary to add sodium carbonate to the third level of physicochemical treatment to remove calcium as much as possible before entering biochemistry; the enterprise The ratio of nitrate nitrogen to ammonia nitrogen basically reaches 3 ~ 4: 1, so the alkalinity generated in the denitrification of the A pool can be used in the nitrification of the O pool, and the process basically does not need to increase the alkalinity.