diff --git a/db/config.py b/db/config.py
new file mode 100644
index 0000000..001c696
--- /dev/null
+++ b/db/config.py
@@ -0,0 +1,19 @@
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    DB_USER: str
+    DB_PASSWORD: str
+    DB_HOST: str
+    DB_PORT: int
+    DB_NAME: str
+
+    @property
+    def db_url_asyncpg(self):
+        # 'postgresql+asyncpg://username:password@localhost:5432/database_name'
+        return f'postgresql+asyncpg://{self.DB_USER}:{self.DB_PASSWORD}@{self.DB_HOST}:{self.DB_PORT}/{self.DB_NAME}'
+
+    model_config = SettingsConfigDict(env_file='../.env')
+
+
+settings = Settings()
\ No newline at end of file
diff --git a/db/db_connection.py b/db/db_connection.py
index 528db69..6cd6d8f 100644
--- a/db/db_connection.py
+++ b/db/db_connection.py
@@ -1,7 +1,6 @@
 from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine, async_sessionmaker
+from config import settings
 
-# Асинхронное подключение к PostgreSQL
-DATABASE_URL = 'postgresql+asyncpg://username:password@localhost:5432/database_name'
-engine = create_async_engine(DATABASE_URL, echo=True)
+engine = create_async_engine(url=settings.db_url_asyncpg, echo=True)
 
 async_session = async_sessionmaker(engine)
diff --git a/db/models/experiment_data_model.py b/db/models/experiment_data_model.py
index 0ac0fcc..1ee7167 100644
--- a/db/models/experiment_data_model.py
+++ b/db/models/experiment_data_model.py
@@ -2,7 +2,7 @@ from base import Base
 from sqlalchemy.orm import Mapped, mapped_column
 
 class ExperimentData(Base):
-    __tablename__ = 'ExperimentData'
+    __tablename__ = 'experiment_data'
 
     id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
     direction: Mapped[float]
diff --git a/db/models/experiment_parameters_model.py b/db/models/experiment_parameters_model.py
index 4b39fe1..ad41a9f 100644
--- a/db/models/experiment_parameters_model.py
+++ b/db/models/experiment_parameters_model.py
@@ -1,16 +1,20 @@
+from typing import Optional
+
+from sqlalchemy import ForeignKey
+
 from base import Base
 from sqlalchemy.orm import Mapped, mapped_column
 
 class ExperimentParameters(Base):
-    __tablename__ = 'ExperimentParameters'
+    __tablename__ = 'experiment_parameters'
 
     id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
     outer_blades_count: Mapped[int]
     outer_blades_length: Mapped[float]
     outer_blades_angle: Mapped[float]
     middle_blades_count: Mapped[int]
-    load_id: Mapped[int]
-    recycling_id: Mapped[int]
+    load_id: Mapped[Optional[int]] = mapped_column(ForeignKey('load_parameters.id', ondelete='SET NULL'))
+    recycling_id: Mapped[Optional[int]] = mapped_column(ForeignKey('recycling_parameters.id', ondelete='SET NULL'))
     experiment_hash: Mapped[str]
 
     def __repr__(self):
diff --git a/db/models/load_parameters_model.py b/db/models/load_parameters_model.py
index 4027656..5895199 100644
--- a/db/models/load_parameters_model.py
+++ b/db/models/load_parameters_model.py
@@ -2,7 +2,7 @@ from base import Base
 from sqlalchemy.orm import Mapped, mapped_column
 
 class LoadParameters(Base):
-    __tablename__ = 'LoadParameters'
+    __tablename__ = 'load_parameters'
 
     id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
     load: Mapped[int]
diff --git a/db/models/recycling_parameters_model.py b/db/models/recycling_parameters_model.py
index a21aae6..cea125a 100644
--- a/db/models/recycling_parameters_model.py
+++ b/db/models/recycling_parameters_model.py
@@ -1,11 +1,15 @@
+from typing import Optional
+
+from sqlalchemy import ForeignKey
+
 from base import Base
 from sqlalchemy.orm import Mapped, mapped_column
 
 class RecyclingParameters(Base):
-    __tablename__ = 'RecyclingParameters'
+    __tablename__ = 'recycling_parameters'
 
     id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
-    load_id: Mapped[int]
+    load_id: Mapped[Optional[int]] = mapped_column(ForeignKey('load_parameters.id', ondelete='SET NULL'))
     recycling_level: Mapped[int]
     co2: Mapped[float]
     n2: Mapped[float]