金海湖湖水经精密过滤-超滤预处理后，预处理出水经高压泵(CRN3-29，格兰富)泵入装有不同数量纳滤膜的脱盐系统，纳滤膜采用商品化聚酰胺4040卷式膜组件（VNF2，贵阳时代沃顿有限公司）。待压力和流速稳定半小时后采集产水水样，由第三方检测机构测定钙镁离子含量，计算钙镁脱除率。操作压力1.3 MPa，进水盐含量7.5 g/L，水温30 ± 2℃，进水流量 2 m3/h，膜组件数为6-8支。\n
钙镁离子含量测定根据《生活饮用水标准检验方法》GB/T 15452-2009标准规范测试方法和流程。测量精确到小数点后两位。纳滤脱盐系统对钙离子和镁离子的脱除率分别大于98.45%和 98.72%，达到任务书考核指标。", "ds_source": "
实验获得。", "ds_process_way": "
操作压力1.3 MPa，进水含盐量7.5 g/L，水温30 ± 2℃，进水流量 2 m3/h的条件下收集纳滤脱盐产水。湖水和纳滤产水中钙镁离子含量由第三方检测机构测定。", "ds_quality": "
(1)数据生产过程：金海湖湖水经精密过滤-超滤预处理后，预处理出水经高压泵(CRN3-29，格兰富)泵入装有不同数量纳滤膜的脱盐系统，纳滤膜采用商品化聚酰胺4040卷式膜组件（VNF2，贵阳时代沃顿有限公司）。待压力和流速稳定半小时后采集产水水样，由第三方检测机构测定钙镁离子含量，计算钙镁脱除率。\n
(2)方法：操作压力1.3 MPa，进水盐含量7.5 g/L，水温30 ± 2℃，进水流量 2 m3/h，膜组件数为6-8支。钙镁离子含量测定根据《生活饮用水标准检验方法》GB/T 15452-2009标准规范测试方法和流程。测量精确到小数点后两位。\n
(3)结果：纳滤脱盐系统对钙离子和镁离子的脱除率分别大于98.45%和 98.72%，达到任务书考核指标。", "ds_acq_start_time": "2020-07-20 00:00:00", "ds_acq_end_time": "2020-09-20 00:00:00", "ds_acq_place": "天津市滨海新区金海湖", "ds_acq_lon_east": null, "ds_acq_lat_south": null, "ds_acq_lon_west": null, "ds_acq_lat_north": null, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 542750, "ds_files_count": 2, "ds_format": "excel", "ds_space_res": null, "ds_time_res": "", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "7bfba711-0505-43fc-b294-1d9076def3eb.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "d6a6694f-4988-40e1-ac47-a19692c05b3d", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.5515" ], "quality_level": 3, "publish_time": "2021-10-22 15:26:32", "last_updated": "2025-05-29 17:26:49", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.MDBW.2021.15", "i18n": { "en": { "title": "Tianjin Jinhai Lake Water Nanofiltration Hardness Removal Rate Dataset (July-September 2020)", "ds_format": "excel", "ds_source": "
Experimentally obtained.", "ds_quality": "
(1) Data production process: after the lake water of Jinhai Lake is pre-treated by precision filtration-ultrafiltration, the pre-treated effluent is pumped by a high-pressure pump (CRN3-29, Grundfos) into the desalination system equipped with different quantities of nano-filtration membranes, which are made of commercialized polyamide 4040 rolled membrane module (VNF2, Guiyang Times Walden Co., Ltd.). After the pressure and flow rate were stabilized for half an hour, water samples of produced water were collected, and the calcium and magnesium ion content was determined by a third-party testing organization to calculate the calcium and magnesium removal rate.\n
(2) Methods: operating pressure 1.3 MPa, influent salt content 7.5 g/L, water temperature 30 ± 2 ℃, influent flow rate 2 m3/h, the number of membrane modules for 6-8. Calcium and magnesium ion content determination according to the “standard test methods for drinking water” GB/T 15452-2009 standard specification test methods and processes. The measurement is accurate to two decimal places.\n
(3) Results: the removal rate of calcium and magnesium ions by the nanofiltration desalination system is greater than 98.45% and 98.72%, respectively, and reaches the assessment index of the task book.", "ds_ref_way": "", "ds_abstract": "
After the lake water of Jinhai Lake was pre-treated by precision filtration-ultrafiltration, the pre-treated effluent was pumped by a high-pressure pump (CRN3-29, Grundfos) into the desalination system equipped with different numbers of nanofiltration membranes, which were made of commercialized polyamide 4040 rolled-type membrane modules (VNF2, Guiyang Times Walden Co., Ltd.). After the pressure and flow rate were stabilized for half an hour, water samples of produced water were collected, and the calcium and magnesium ion content was determined by a third-party testing organization to calculate the calcium and magnesium removal rate. The operating pressure was 1.3 MPa, the salt content of the influent water was 7.5 g/L, the water temperature was 30 ± 2°C, the influent flow rate was 2 m3/h, and the number of membrane modules was 6-8 pieces.\n
Calcium and magnesium ion content determination according to the “standard test methods for drinking water” GB/T 15452-2009 standard specification of the test method and process. Measurement is accurate to two decimal places. The removal rate of calcium and magnesium ions by nanofiltration desalination system is greater than 98.45% and 98.72% respectively, which reaches the assessment index of the task book.
", "ds_time_res": "", "ds_acq_place": "Jinhai Lake, Binhai New Area, Tianjin", "ds_space_res": "", "ds_projection": "", "ds_process_way": "Operating pressure of 1.3 MPa, inlet water salinity of 7.5 g/L, water temperature of 30 ± 2 ℃, inlet water flow rate of 2 m3/h under the conditions of collection of nanofiltration desalination water. The calcium and magnesium ion content of the lake water and nanofiltration produced water was measured by a third-party testing organization.", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "ds_topic_tags": [ "纳滤", "钙离子", "镁离子" ], "ds_subject_tags": [ "水文化学" ], "ds_class_tags": [], "ds_locus_tags": [ "天津市滨海新区金海湖" ], "ds_time_tags": [ 2020 ], "ds_contributors": [ { "true_name": "杜润红", "email": "durunhong@tiangong.edu.cn", "work_for": "天津工业大学", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "杜润红", "email": "durunhong@tiangong.edu.cn", "work_for": "天津工业大学", "country": "中国" } ], "ds_managers": [ { "true_name": "杜润红", "email": "durunhong@tiangong.edu.cn", "work_for": "天津工业大学", "country": "中国" } ], "category": "其他" }