Environmental Protection Acceptance Report for the Completion of the Salt Slag Comprehensive Utilization Project of Hunan Haohua Chemical Co., Ltd.

Hunan Haohua Chemical Co., Ltd.

Environmental Protection for the Completion of the Salt Residue Comprehensive Utilization Project

inspection

Receive

Capital

material

Construction Unit: Hunan Haohua Chemical Co., Ltd.

Prepared by: Hunan Jingxiu Environmental Protection Technology Co., Ltd.

Two 〇 Two One year Eight month

Table of Contents

One Self-Inspection Report of the Enterprise for Completion Environmental Protection Acceptance Monitoring

Two Environmental Protection Acceptance Monitoring Report upon Completion

III. Other Explanations

Self‑Inspection Report on Environmental Protection for the Completion of the Salt Slag Comprehensive Utilization Project of Hunan Haohua Chemical Co., Ltd.

Construction Entity: Hunan Haohua Chemical Co., Ltd.

Survey Date: August 2021

1 Project Overview

1.1 Project Overview

Investment by Hunan Haohua Chemical Co., Ltd. 501.4 Comprehensive utilization of sulfonation centrifugal sludge generated in the insecticide‑active‑ingredient workshop, with a capacity of ten thousand yuan (no external sources will be accepted). According to the environmental impact assessment and approval for the salt‑slag comprehensive utilization project of Hunan Haohua Chemical Co., Ltd., this project will not involve the construction of new buildings or structures, nor will it require additional land; the newly added major production equipment will be installed within the existing premises. 2# Production is carried out in the insecticide‑single workshop, while the raw material warehouse, finished‑product warehouse, and other auxiliary facilities are all integrated into the existing infrastructure. Upon completion, the project will be capable of annually processing a total amount of salt residue. 5000t/a , annual production of brick and tile antifreeze 3775t/a (Actual production capacity is determined based on the enterprise’s processing volume of sulfonation centrifugal waste residue; product composition test reports are provided in the appendix.) 10 ).

Table 1.1-1 Project Construction Overview Table

2 Status of Environmental Compliance Procedures

Environmental Impact Assessment Report for the Comprehensive Green Relocation and Upgrade Project of Hunan Haohua Biological Products Co., Ltd. at 2019 year 3 Monthly commission Hunan Baohua Environmental Protection Co., Ltd. Completed compilation ， and also 2019 year 4 month 16 The date was approved by the Hunan Provincial Department of Ecology and Environment. Xiang Environmental Impact Assessment [ 2019 ] 17 Number , the project was initiated in 2019 year 10 month 31 Passed acceptance on the same day; Environmental Impact Report for the Comprehensive Utilization Project of Salt Residue at Hunan Haohua Chemical Co., Ltd. at 2020 year 1 Monthly commission Hunan Jingxin Environmental Protection Technology Co., Ltd. Prepared, and on 2021 year 1 month 26 The approval was issued by the Zhuzhou Ecological Environment Bureau on [date]. Plant Environmental Impact Assessment [ 2021 ] 2 Number ) 。 According to the approval document, the enterprise is no longer required to purchase the full volume of discharge permits (as its original permit had a surplus); however, since the discharge permit did not cover the production line for the comprehensive utilization of salt slag, the enterprise has re-applied for a discharge permit (see attachment). 4 ) 。 This project involves the comprehensive utilization of hazardous waste. The environmental risks faced by the enterprise have not undergone any significant changes; therefore, no revision to the emergency response plan is required (Emergency Response Plan Filing No.: 430223-2019-040-H ).

3 Self-Inspection of Project Construction Status

3.1 Project Construction Content

Corporate investment 527.3 Comprehensive utilization of sulfonation centrifugation sludge generated in the insecticide‑dichlorvos workshop (no external sources will be accepted). This project will not involve the construction of new buildings or structures, nor will it require additional land; the newly added major production equipment will be installed within the existing facilities. 2# Production is carried out in the insecticide‑single workshop, while the raw material warehouse, finished‑product warehouse, and other auxiliary facilities are all integrated into the existing infrastructure. Upon completion, the project will be capable of annually processing a total amount of salt residue. 5000t/a , annual production of brick and tile antifreeze 3775t/a (Actual production capacity is determined based on the enterprise’s processing volume of sulfonation centrifugal sludge.)

Table 3.1-1 Comparison Table of Project Construction Contents

3.2 Main raw and auxiliary materials

The changes in the consumption of the project’s major raw and auxiliary materials are shown in the table below.

Table 3.2-1 Overview of the Project’s Raw and Auxiliary Materials and Energy Consumption

Note: The original salt residue refers to the salt sludge generated since the enterprise began trial production. 2019 year 7 month -2021 year 1 month), the newly generated salt sludge refers to the salt sludge produced by the enterprise since the start of trial production for the salt‑sludge comprehensive utilization project ( 2021 year 2 month -5 Since the start of trial production, a total of brick and tile antifreeze has been produced. 1234.201 t . The relevant circumstances have been reported to the competent authorities.

4 Self-Inspection of Environmental Protection Facility Construction

4.1 Exhaust gas

( 1 ) Production process exhaust gas

This project’s salt residue primarily contains sodium chloride, moisture, dimethoate, sodium thiosulfate, and other components such as methanol, sodium sulfite, sodium bisulfite, and sodium sulfide. Methanol in the salt residue is readily soluble in water and highly susceptible to oxidation by hydrogen peroxide; therefore, most of the methanol entrained in the residue can be oxidized by hydrogen peroxide into carbon dioxide and water. During the oxidation process with hydrogen peroxide, the dimethoate present in the salt residue will produce… NH ₃ Gaseous emissions. The waste gases generated in this project primarily originate from the production process and consist mainly of ammonia. NH ₃ The production rate is 0.29kg/h , resulting in a concentration of 144mg/m³ . The enterprise has installed a reactor off-gas collection system to capture and centrally treat the project’s exhaust gases as much as possible, ensuring organized emissions. After collection, the project’s exhaust gases are routed to… 2# Insecticide waste gas treatment unit (primary water spray) + After treatment by first‑stage alkaline spray scrubbing, the effluent is discharged through a rooftop stack to an emission height of approximately… 15m。

( 2 ) Wastewater treatment and exhaust gas

The wastewater generated by this project primarily consists of process‑related effluent and rinse water from equipment and workshop cleaning. The wastewater will be treated at the plant’s existing treatment facility. During the treatment process, odorous pollutants such as hydrogen sulfide and ammonia may be produced. Utilizing the enterprise’s existing exhaust‑gas collection system, the gases will be captured in a closed loop and subjected to primary alkaline scrubbing. + Photocatalysis + After treatment by the biological spray device, it is discharged from 25m Emission from the exhaust stack, with an air flow rate of 17000 m ³/h . The wastewater quality of this project is similar to that of the existing facility, with an additional volume compared to the existing facility of 12462t/a , the increase is 3.45% , the increase is very small; therefore, the concentrations of all gaseous pollutants generated by the wastewater treatment plant remain essentially unchanged. 。

The waste gas pollutant control measures for this project are shown in the table below.

Table 4.11 Overview of Measures for the Control of Project Emission Pollutants

4.2 Wastewater

The wastewater generated by this project primarily consists of condensate, filtrate, effluent from equipment and workshop cleaning, and periodic discharge from the circulating water station. It will be treated at the enterprise’s existing wastewater treatment facility. The main pollutants in the project’s wastewater are… Cash on Delivery 、 BOD , salt content, etc., In this project, the wastewater is first mixed with other high‑concentration effluents and conveyed to the plant’s central wastewater treatment station. After being blended with low‑concentration wastewater in a prescribed ratio, it enters the treatment process at the station. Once it meets the Class III standards of the Integrated Wastewater Discharge Standard and the influent design criteria of the park’s wastewater treatment plant, it is discharged into the park’s sewage network, sent to the park’s treatment facility for centralized treatment, and, upon compliance with discharge standards, released into the Mi River.